Search Results: "dark"

1 June 2015

Enrico Zini: 05

Internet references saved for May 2015 Instead of keeping substantial tabs open until I have read all of them, or losing them in the jungle of browser bookmarks, I have written a script that collects them into a file per month, and turns them into markdown files for my blog. This way I sort of know where to find them, and if I do not, some internet search might. And if I wish, I can even choose to share it. download as mailbox

17 May 2015

Lunar: Reproducible builds: week 2 in Stretch cycle

What happened about the reproducible builds effort for this week: Media coverage Debian's effort on reproducible builds has been covered in the June 2015 issue of Linux Magazin in Germany. Cover of Linux Magazin June 2015 Article about reproducible builds in Linux Magazin June 2015 Toolchain fixes josch rebased the experimental version of debhelper on 9.20150507. Packages fixed The following 515 packages became reproducible due to changes of their build dependencies: airport-utils, airspy-host, all-in-one-sidebar, ampache, aptfs, arpack, asciio, aspell-kk, asused, balance, batmand, binutils-avr, bioperl, bpm-tools, c2050, cakephp-instaweb, carton, cbp2make, checkbot, checksecurity, chemeq, chronicle, cube2-data, cucumber, darkstat, debci, desktop-file-utils, dh-linktree, django-pagination, dosbox, eekboek, emboss-explorer, encfs, exabgp, fbasics, fife, fonts-lexi-saebom, gdnsd, glances, gnome-clocks, gunicorn, haproxy, haskell-aws, haskell-base-unicode-symbols, haskell-base64-bytestring, haskell-basic-prelude, haskell-binary-shared, haskell-binary, haskell-bitarray, haskell-bool-extras, haskell-boolean, haskell-boomerang, haskell-bytestring-lexing, haskell-bytestring-mmap, haskell-config-value, haskell-mueval, haskell-tasty-kat, itk3, jnr-constants, jshon, kalternatives, kdepim-runtime, kdevplatform, kwalletcli, lemonldap-ng, libalgorithm-combinatorics-perl, libalgorithm-diff-xs-perl, libany-uri-escape-perl, libanyevent-http-scopedclient-perl, libanyevent-perl, libanyevent-processor-perl, libapache-session-wrapper-perl, libapache-sessionx-perl, libapp-options-perl, libarch-perl, libarchive-peek-perl, libaudio-flac-header-perl, libaudio-wav-perl, libaudio-wma-perl, libauth-yubikey-decrypter-perl, libauthen-krb5-simple-perl, libauthen-simple-perl, libautobox-dump-perl, libb-keywords-perl, libbarcode-code128-perl, libbio-das-lite-perl, libbio-mage-perl, libbrowser-open-perl, libbusiness-creditcard-perl, libbusiness-edifact-interchange-perl, libbusiness-isbn-data-perl, libbusiness-tax-vat-validation-perl, libcache-historical-perl, libcache-memcached-perl, libcairo-gobject-perl, libcarp-always-perl, libcarp-fix-1-25-perl, libcatalyst-action-serialize-data-serializer-perl, libcatalyst-controller-formbuilder-perl, libcatalyst-dispatchtype-regex-perl, libcatalyst-plugin-authentication-perl, libcatalyst-plugin-authorization-acl-perl, libcatalyst-plugin-session-store-cache-perl, libcatalyst-plugin-session-store-fastmmap-perl, libcatalyst-plugin-static-simple-perl, libcatalyst-view-gd-perl, libcgi-application-dispatch-perl, libcgi-application-plugin-authentication-perl, libcgi-application-plugin-logdispatch-perl, libcgi-application-plugin-session-perl, libcgi-application-server-perl, libcgi-compile-perl, libcgi-xmlform-perl, libclass-accessor-classy-perl, libclass-accessor-lvalue-perl, libclass-accessor-perl, libclass-c3-adopt-next-perl, libclass-dbi-plugin-type-perl, libclass-field-perl, libclass-handle-perl, libclass-load-perl, libclass-ooorno-perl, libclass-prototyped-perl, libclass-returnvalue-perl, libclass-singleton-perl, libclass-std-fast-perl, libclone-perl, libconfig-auto-perl, libconfig-jfdi-perl, libconfig-simple-perl, libconvert-basen-perl, libconvert-ber-perl, libcpan-checksums-perl, libcpanplus-dist-build-perl, libcriticism-perl, libcrypt-cracklib-perl, libcrypt-dh-gmp-perl, libcrypt-mysql-perl, libcrypt-passwdmd5-perl, libcrypt-simple-perl, libcss-packer-perl, libcss-tiny-perl, libcurses-widgets-perl, libdaemon-control-perl, libdancer-plugin-database-perl, libdancer-session-cookie-perl, libdancer2-plugin-database-perl, libdata-format-html-perl, libdata-uuid-libuuid-perl, libdata-validate-domain-perl, libdate-jd-perl, libdate-simple-perl, libdatetime-astro-sunrise-perl, libdatetime-event-cron-perl, libdatetime-format-dbi-perl, libdatetime-format-epoch-perl, libdatetime-format-mail-perl, libdatetime-tiny-perl, libdatrie, libdb-file-lock-perl, libdbd-firebird-perl, libdbix-abstract-perl, libdbix-class-datetime-epoch-perl, libdbix-class-dynamicdefault-perl, libdbix-class-introspectablem2m-perl, libdbix-class-timestamp-perl, libdbix-connector-perl, libdbix-oo-perl, libdbix-searchbuilder-perl, libdbix-xml-rdb-perl, libdevel-stacktrace-ashtml-perl, libdigest-hmac-perl, libdist-zilla-plugin-emailnotify-perl, libemail-date-format-perl, libemail-mime-perl, libemail-received-perl, libemail-sender-perl, libemail-simple-perl, libencode-detect-perl, libexporter-tidy-perl, libextutils-cchecker-perl, libextutils-installpaths-perl, libextutils-libbuilder-perl, libextutils-makemaker-cpanfile-perl, libextutils-typemap-perl, libfile-counterfile-perl, libfile-pushd-perl, libfile-read-perl, libfile-touch-perl, libfile-type-perl, libfinance-bank-ie-permanenttsb-perl, libfont-freetype-perl, libfrontier-rpc-perl, libgd-securityimage-perl, libgeo-coordinates-utm-perl, libgit-pureperl-perl, libgnome2-canvas-perl, libgnome2-wnck-perl, libgraph-readwrite-perl, libgraphics-colornames-www-perl, libgssapi-perl, libgtk2-appindicator-perl, libgtk2-gladexml-simple-perl, libgtk2-notify-perl, libhash-asobject-perl, libhash-moreutils-perl, libhtml-calendarmonthsimple-perl, libhtml-display-perl, libhtml-fillinform-perl, libhtml-form-perl, libhtml-formhandler-model-dbic-perl, libhtml-html5-entities-perl, libhtml-linkextractor-perl, libhtml-tableextract-perl, libhtml-widget-perl, libhtml-widgets-selectlayers-perl, libhtml-wikiconverter-mediawiki-perl, libhttp-async-perl, libhttp-body-perl, libhttp-date-perl, libimage-imlib2-perl, libimdb-film-perl, libimport-into-perl, libindirect-perl, libio-bufferedselect-perl, libio-compress-lzma-perl, libio-compress-perl, libio-handle-util-perl, libio-interface-perl, libio-multiplex-perl, libio-socket-inet6-perl, libipc-system-simple-perl, libiptables-chainmgr-perl, libjoda-time-java, libjsr305-java, libkiokudb-perl, liblemonldap-ng-cli-perl, liblexical-var-perl, liblingua-en-fathom-perl, liblinux-dvb-perl, liblocales-perl, liblog-dispatch-configurator-any-perl, liblog-log4perl-perl, liblog-report-lexicon-perl, liblwp-mediatypes-perl, liblwp-protocol-https-perl, liblwpx-paranoidagent-perl, libmail-sendeasy-perl, libmarc-xml-perl, libmason-plugin-routersimple-perl, libmasonx-processdir-perl, libmath-base85-perl, libmath-basecalc-perl, libmath-basecnv-perl, libmath-bigint-perl, libmath-convexhull-perl, libmath-gmp-perl, libmath-gradient-perl, libmath-random-isaac-perl, libmath-random-oo-perl, libmath-random-tt800-perl, libmath-tamuanova-perl, libmemoize-expirelru-perl, libmemoize-memcached-perl, libmime-base32-perl, libmime-lite-tt-perl, libmixin-extrafields-param-perl, libmock-quick-perl, libmodule-cpanfile-perl, libmodule-load-conditional-perl, libmodule-starter-pbp-perl, libmodule-util-perl, libmodule-versions-report-perl, libmongodbx-class-perl, libmoo-perl, libmoosex-app-cmd-perl, libmoosex-attributehelpers-perl, libmoosex-blessed-reconstruct-perl, libmoosex-insideout-perl, libmoosex-relatedclassroles-perl, libmoosex-role-timer-perl, libmoosex-role-withoverloading-perl, libmoosex-storage-perl, libmoosex-types-common-perl, libmoosex-types-uri-perl, libmoox-singleton-perl, libmoox-types-mooselike-numeric-perl, libmousex-foreign-perl, libmp3-tag-perl, libmysql-diff-perl, libnamespace-clean-perl, libnet-bonjour-perl, libnet-cli-interact-perl, libnet-daap-dmap-perl, libnet-dbus-glib-perl, libnet-dns-perl, libnet-frame-perl, libnet-google-authsub-perl, libnet-https-any-perl, libnet-https-nb-perl, libnet-idn-encode-perl, libnet-idn-nameprep-perl, libnet-imap-client-perl, libnet-irc-perl, libnet-mac-vendor-perl, libnet-openid-server-perl, libnet-smtp-ssl-perl, libnet-smtp-tls-perl, libnet-smtpauth-perl, libnet-snpp-perl, libnet-sslglue-perl, libnet-telnet-perl, libnhgri-blastall-perl, libnumber-range-perl, libobject-signature-perl, libogg-vorbis-header-pureperl-perl, libopenoffice-oodoc-perl, libparse-cpan-packages-perl, libparse-debian-packages-perl, libparse-fixedlength-perl, libparse-syslog-perl, libparse-win32registry-perl, libpdf-create-perl, libpdf-report-perl, libperl-destruct-level-perl, libperl-metrics-simple-perl, libperl-minimumversion-perl, libperl6-slurp-perl, libpgobject-simple-perl, libplack-middleware-fixmissingbodyinredirect-perl, libplack-test-externalserver-perl, libplucene-perl, libpod-tests-perl, libpoe-component-client-ping-perl, libpoe-component-jabber-perl, libpoe-component-resolver-perl, libpoe-component-server-soap-perl, libpoe-component-syndicator-perl, libposix-strftime-compiler-perl, libposix-strptime-perl, libpostscript-simple-perl, libproc-processtable-perl, libprotocol-osc-perl, librcs-perl, libreadonly-xs-perl, libreturn-multilevel-perl, librivescript-perl, librouter-simple-perl, librrd-simple-perl, libsafe-isa-perl, libscope-guard-perl, libsemver-perl, libset-tiny-perl, libsharyanto-file-util-perl, libshell-command-perl, libsnmp-info-perl, libsoap-lite-perl, libstat-lsmode-perl, libstatistics-online-perl, libstring-compare-constanttime-perl, libstring-format-perl, libstring-toidentifier-en-perl, libstring-tt-perl, libsub-recursive-perl, libsvg-tt-graph-perl, libsvn-notify-perl, libswish-api-common-perl, libtap-formatter-junit-perl, libtap-harness-archive-perl, libtemplate-plugin-number-format-perl, libtemplate-plugin-yaml-perl, libtemplate-tiny-perl, libtenjin-perl, libterm-visual-perl, libtest-block-perl, libtest-carp-perl, libtest-classapi-perl, libtest-cmd-perl, libtest-consistentversion-perl, libtest-data-perl, libtest-databaserow-perl, libtest-differences-perl, libtest-file-sharedir-perl, libtest-hasversion-perl, libtest-kwalitee-perl, libtest-lectrotest-perl, libtest-module-used-perl, libtest-object-perl, libtest-perl-critic-perl, libtest-pod-coverage-perl, libtest-script-perl, libtest-script-run-perl, libtest-spelling-perl, libtest-strict-perl, libtest-synopsis-perl, libtest-trap-perl, libtest-unit-perl, libtest-utf8-perl, libtest-without-module-perl, libtest-www-selenium-perl, libtest-xml-simple-perl, libtest-yaml-perl, libtex-encode-perl, libtext-bibtex-perl, libtext-csv-encoded-perl, libtext-csv-perl, libtext-dhcpleases-perl, libtext-diff-perl, libtext-quoted-perl, libtext-trac-perl, libtext-vfile-asdata-perl, libthai, libthread-conveyor-perl, libthread-sigmask-perl, libtie-cphash-perl, libtie-ical-perl, libtime-stopwatch-perl, libtk-dirselect-perl, libtk-pod-perl, libtorrent, libturpial, libunicode-japanese-perl, libunicode-maputf8-perl, libunicode-stringprep-perl, libuniversal-isa-perl, libuniversal-moniker-perl, liburi-encode-perl, libvi-quickfix-perl, libvideo-capture-v4l-perl, libvideo-fourcc-info-perl, libwiki-toolkit-plugin-rss-reader-perl, libwww-mechanize-formfiller-perl, libwww-mechanize-gzip-perl, libwww-mechanize-perl, libwww-opensearch-perl, libx11-freedesktop-desktopentry-perl, libxc, libxml-dtdparser-perl, libxml-easy-perl, libxml-handler-trees-perl, libxml-libxml-iterator-perl, libxml-libxslt-perl, libxml-rss-perl, libxml-validator-schema-perl, libxml-xpathengine-perl, libxml-xql-perl, llvm-py, madbomber, makefs, mdpress, media-player-info, meta-kde-telepathy, metamonger, mmm-mode, mupen64plus-audio-sdl, mupen64plus-rsp-hle, mupen64plus-ui-console, mupen64plus-video-z64, mussort, newpid, node-formidable, node-github-url-from-git, node-transformers, nsnake, odin, otcl, parsley, pax, pcsc-perl, pd-purepd, pen, prank, proj, proot, puppet-module-puppetlabs-postgresql, python-async, python-pysnmp4, qrencode, r-bioc-graph, r-bioc-hypergraph, r-bioc-iranges, r-bioc-xvector, r-cran-pscl, rbenv, rlinetd, rs, ruby-ascii85, ruby-cutest, ruby-ejs, ruby-factory-girl, ruby-hdfeos5, ruby-kpeg, ruby-libxml, ruby-password, ruby-zip-zip, sdl-sound1.2, stterm, systemd, taktuk, tcc, tryton-modules-account-invoice, ttf-summersby, tupi, tuxpuck, unknown-horizons, unsafe-mock, vcheck, versiontools, vim-addon-manager, vlfeat, vsearch, xacobeo, xen-tools, yubikey-personalization-gui, yubikey-personalization. The following packages became reproducible after getting fixed: Some uploads fixed some reproducibility issues but not all of them: Patches submitted which did not make their way to the archive yet: reproducible.debian.net Alioth now hosts a script that can be used to redo builds and test for a package. This was preliminary done manually through requests over the IRC channel. This should reduce the number of interruptions for jenkins' maintainers The graph of the oldest build per day has been fixed. Maintainance scripts will not error out when they are no files to remove. Holger Levsen started work on being able to test variations of CPU features and build date (as in build in another month of 1984) by using virtual machines. debbindiff development Version 18 has been released. It will uses proper comparators for pk3 and info files. Tar member names are now assumed to be UTF-8 encoded. The limit for the maximum number of different lines has been removed. Let's see on reproducible.debian.net how it goes for pathological cases. It's now possible to specify both --html and --text output. When neither of them is specified, the default will be to print a text report on the standard output (thanks to Paul Wise for the suggestion). Documentation update Nicolas Boulenguez investigated Ada libraries. Package reviews 451 obsolete reviews have been removed and 156 added this week. New identified issues: running kernel version getting captured, random filenames in GHC debug symbols, and timestamps in headers generated by qdbusxml2cpp. Misc. Holger Levsen went to re:publica and talked about reproducible builds to developers and users there. Holger also had a chance to meet FreeBSD developers and discuss the status of FreeBSD. Investigations have started on how it could be made part of our current test system. Laurent Guerby gave Lunar access to systems in the GCC Compile Farm. Hopefully access to these powerful machines will help to fix packages for GCC, Iceweasel, and similar packages requiring long build times.

4 May 2015

Julien Danjou: The Hacker's Guide to Python, 2nd edition!

A year passed since the first release of The Hacker's Guide to Python in March 2014. A few hundreds copies have been distributed so far, and the feedback is wonderful! I already wrote extensively about the making of that book last year, and I cannot emphasize enough how this adventure has been amazing so far. That's why I decided a few months ago to update the guide and add some new content. So let's talk about what's new in this second edition of the book! First, I obviously fixed a few things. I had some reports about small mistakes and typos which I applied as I received them. Not a lot fortunately, but it's still better to have fewer errors in a book, right? Then, I updated some of the content. Things changed since I wrote the first chapters of that guide 18 months ago. Therefore I had to rewrite some of the sections and take into account new software or libraries that were released. At last, I decided to enhance the book with one more interview. I've requested my fellow OpenStack developer Joshua Harlow, who is leading a few interesting Python projects, to join the long list of interviewees in the book. I hope you'll enjoy it! If you didn't get the book yet, go check it out and use the coupon THGTP2LAUNCH to get 20% off during the next 48 hours!

21 April 2015

Manuel A. Fernandez Montecelo: About the Debian GNU/Linux port for OpenRISC or1k

In my previous post I mentioned my involvement with the OpenRISC or1k port. It was the technical activity in which I spent most time during 2014 (Debian and otherwise, day job aside). I thought that it would be nice to talk a bit about the port for people who don't know about it, and give an update for those who do know and care. So this post explains a bit how it came to be, details about its development, and finally the current status. It is going to be written as a rather personal account, for that matter, since I did not get involved enough in the OpenRISC community at large to learn much about its internal workings and aspects that I was not directly involved with. There is not much information about all of this elsewhere, only bits and pieces scattered here and there, but specially not much public information at all about the development of the Debian port. There is an OpenRISC entry in the Debian wiki, but it does not contain much information yet. Hopefully, this piece will help a bit to preserve history and give an insight for future porters. First Things First I imagine that most people reading this post will be familiar with the terminology, but just in case, to create a new Debian port means to get a Debian system (GNU/Linux variant, in this case) to run in the OpenRISC or1k computer architecture. Setting to one side all differences between hardware and software, and as described in their site:
The aim of the OpenRISC project is to create free and open source computing platforms
It is therefore a good match for the purposes of Debian and Free Software world in general. The processor has not been produced in silicon, or not available for the masses in any case. People with the necessary know-how can download the hardware description (Verilog) and synthesise it in a FPGA, or otherwise use simulators. It is not some piece of hardware that people can purchase yet, and there are no plans to mass-produce it in the near future either. The two people (including me) involved in this Debian port did not have the hardware, so we created the port entirely through cross-compiling from other architectures, and then compiling inside Qemu. In a sense, we were creating a Debian port for hardware that "does not [phisically] exist". The software that we built was tested by people who had hardware available in FPGA, though, so it was at least usable. I understand that people working in the arm64 port had to work similarly in the initial phases, working in the dark without access to real hardware to compile or test. The Spark The first time that I heard about the initiative to create the port was in late February of 2014, in a post which appeared in Linux Weekly News (sent by Paul Wise) and Slashdot. The original post announcing it was actually from late January, from Christian Svensson (blueCmd):
Some people know that I've been working on porting Glibc and doing some toolchain work. My evil master plan was to make a Debian port, and today I'm a happy hacker indeed! Below is a link to a screencast of me installing Debian for OpenRISC, installing python2.7 via apt-get (which you shouldn't do in or1ksim, it takes ages! (but it works!)) and running a small Python script. http://asciinema.org/a/7362
So, now, what can a Debian Hacker do when reading this? (Even if one's Hackery Level is not that high, as it is my case). And well, How Hard Can It Be? I mean, Really? Well, in my own defence, I knew that the answer to the last two questions would be a resounding Very . But for some reason the idea grabbed me and I couldn't help but think that it would be a Really Exciting Project, and that somehow I would like to get involved. So I wrote to Christian offering my help after considering it for a few days, around mid March, and he welcomed me aboard. The Ball Was Already Rolling Christian had already been in contact with the people behind DebianBootstrap, and he had already created the repository http://openrisc.debian.net/ with many packages of the base system and beyond (read: packages name_version_or1k.deb available to download and install). Still nowadays the packages are not signed with proper keys, though, so use your judgement if you want to try them. After a few weeks, I got up to speed with the status of the project and got my system working with the necessary tools. This meant basically sbuild/schroot to compile new packages, with the base system that Christian already got working, installed in a chroot, probably with the help of debootstrap, and qemu-system-or1k to simulate the system. Only a few of the packages were different from the version in Debian, like gcc, binutils or glibc -- they had not been upstreamed yet. sbuild ran through qemu-system-or1k, so the compilation of new packages could happen "natively" (running inside Qemu) rather than cross-compiling the packages, pulling _or1k.deb packages for dependencies from the repository that he had prepared, and _all.deb packages from snapshots.debian.org. I started by trying to get the packages that I [co-]maintain in Debian compiled for this architecture, creating the corresponding _or1k.deb. For most of them, though, I needed many dependencies compiled before I could even compile my packages. The GNU autotools / autoreconf Problem Since very early, many of the packages failed to build with messages such as:
Invalid configuration 'or1k-linux-gnu': machine 'or1k' not recognized
configure: error: /bin/bash ../config.sub or1k-linux-gnu failed
This means that software packages based on GNU autotools and using configure scripts need recent versions of the files config.sub and config.guess that they ship in their root directory, to be able to detect the architecture and generate the code accordingly. This is counter-intuitive, having into account that GNU autotools were designed to help with portability. Yet, in the case of creating new Debian ports, it meant that unless upstream had very recent versions of config. guess,sub , it would prevent the package to compile straight away in the new architectures -- even if invoking gcc without ado would have worked without problems in most cases for native compilation. Of course this did not only affect or1k, and there was already the autoreconf effort underway as a way to update these files automatically when building Debian packages, pushed by people porting Debian to the new architectures added in 2013/2014 (mips64el, arm64, ppc64el), which encountered the same roadblock. This affected around a thousand source packages in unstable. A Royal Pain. Also, all of their reverse dependencies (packages that depended on those to be built) could not be compiled straight away. The bugs were not Release Critical, though (none of these architectures were officially accepted at the time), so for people not concerned with the new ports there was no big incentive to get them fixed. This problem, which conceptually is easily solvable, prevented new ports to even attempt compile vast portions of the archive straight away (cleanly, without modifications to the package or to the host system), for weeks or months. The GNU autotools / autoreconf Solution We tackled this problem mainly in two ways. First, more useful for Debian in general, was to do as other porters were doing and submit bug reports and patches to Debian packages requesting them to use autoreconf, and NMUing packages (uploading changes to the archive without the official maintainers' intervention). A few NMUs were made for packages which had bug reports with patches available for a while, that were in the critical path to get many other packages compiled, and that were orphan or had almost no maintainer activity. The people working in the other new ports, and mainly Ubuntu people which helped with some of those ports and wanted to support them, had submitted a large amount of requests since late 2013, so there was no shortage of NMUs to be made. Some porters, not being Debian Developers, could not easily get the changes applied; so I also helped a bit the porters of other architectures, specially later on before the freeze of Jessie, to get as many packages compiled in those architectures as possible. The second way was to create dpkg-buildpackage hooks that updated unconditionally config. guess,sub before attempting to build the package in the local build system. This local and temporary solution allowed us in the or1k port to get many _or1k.deb packages in the experimental repository, which in turn would allow many more packages to compile. After a few weeks, I set up many sbuilds in a multi-core machine attempting to build uninterruptedly packages that were not previously built and which had their dependencies available. Every now and then (typically several times per day in peak times) I pushed the resulting _or1k.deb files to the repository, so more packages would have the necessary dependencies ready to attempt to build. Christian was doing something similar, and by April at peak times, among the two of us, we were compiling some days more than a hundred packages -- a huge amount of packages did not need any change other than up-to-date config. guess,sub files. At some point, late April, Christian set up wanna-build in a few hosts to do this more elegantly and smartly than my method, and more effectively as well. Ugly Hacks, Bugs and Shortcomings in the Toolchain and Qemu Some packages are extremely important because many other packages need them to compile (like cmake, Qt or GTK+), and they are themselves very complex and have dependency loops. They had deeper problems than the autoreconf issue and needed some seriously dirty hacking to get them built. To try to get as many packages compiled as possible, we sometimes compiled these important packages with some functionality disabled, disabling some binary packages (e.g. Java bindings) or specially disabling documentation (using DEB_BUILD_OPTIONS=nodoc when possible, and more aggressively when needed by removing chunks of debian/rules). I tried to use the more aggressive methods in as few packages as possible, though, about a dozen in total. We also used DEB_BUILD_OPTIONS=nocheck for speeding up compilation and avoiding build failures -- many packages' tests failed due to qemu-system-or1k not supporting multi-threading, which we could do nothing about at the time, but otherwise the packages mostly passed tests fine. Due to bugs and shortcomings in Qemu and the toolchain --like the compiler lacking atomics, missing functionality in glibc, Qemu entering in endless loops, or programs segfaulting (especially gettext, used by many packages and causing the packages failing to build)--, we had to resort to some very creative ways or time-consuming dull work to edit debian/rules, or to create wrappers of the real programs avoiding or forcing certain options (like gcc -O0, since -O2 made buggy binaries too often). To avoid having a mix of cleanly compiled and hacked packages in the same repository, Christian set up a two-tiered repository system -- the clean one and the dirty one. In the dirty one we dumped all of the packages that we got built, no matter how. The packages in the clean one could use packages from the dirty one to build, but they themselves were compiled without any hackery. Of course this was not a completely airtight solution, since they could contain code injected at build time from the "dirty repository" (e.g. by static linking), and perhaps other quirks. We hoped to get rid of these problems later by rebuilding all packages against clean builds of all their dependencies. In addition, Christian also spent significant amounts of time working inside the OpenRISC community, debugging problems, testing and recompiling special versions of the toolchain that we could use to advance in our compilation of the whole archive. There were other people in the OpenRISC community implementing the necessary bits in the toolchain, but I don't know the details. Good Progress Olof Kindgren wrote the OpenRISC health report April 2014 (actually posted in May), explaining the status at the time of projects in the broad OpenRISC community, and talking about the software side, Debian port included. Sadly, I think that there have been no more "health reports" since then. There was also a new post in Slashdot entitled OpenRISC Gains Atomic Operations and Multicore Support shortly thereafter. In the side of the Debian port, from time to time new versions of packages entered unstable and we started to use those newer versions. Some of them had nice fixes, like the autoreconf updates, so they did not require local modifications. In other cases, the new versions failed to build when old ones had worked (e.g. because the newer versions added support and dependencies of new versions of gnutls, systemd or other packages not yet available for or1k), and we had to repeat or create more nasty hacks to get the packages built again. But in general, progress was very good. There were about 10k arch-dependent packages in Debian at the time, and we got about half of them compiled by the beginning of May, counting clean and dirty. And, if I recall correctly, there were around the same number of arch=all (which can be installed in any architecture, after the package is built in one of them). Counting both, it meant that systems using or1k got about 15k packages available, or 75% of the whole Debian archive (at least "main", we excluded "contrib" and "non-free"). Not bad. By the middle to end of May, we had about 6k arch-dependent packages compiled, and 4k to go. The count of packages eventually reached ~6.6k at its peak (I think that in June/July). Many had been built with hacks and not rebuilt cleanly yet, but everything was fine until the amount of packages built plateaued. Plateauing There were multiple reasons for that. One of them is that after having fixed the autoreconf issue locally in some packages, new versions were uploaded to Debian without fixing that problem (in many cases there was no bug report or patch yet, so it was understandable; in other cases the requests were ignored). The wanna-build for the clean repository set up by Christian rightly considered the package out-of-date and prepared to build the more recent version, that failed. Then, other packages entering the unstable archive and build-depending on newer versions of those could not be built ("BD-Uninstallable"), until we built the newer versions of the dependencies in the dirty repository with local hacks. Consequently, the count of cleanly built packages went back-and-forth, when not backwards. More challenging was the fact that when creating a new port, language compilers which are written in that same language need to be built for that architecture first. Sometimes it is not the compiler, but compile-time or run-time support for modules of a language are not ported yet. Obviously, as with other dependencies, large amounts of packages written in those languages are bound to remain uncompiled for a long time. As Colin Watson explained in porting Haskell's GHC to arm64 and ppc64el, untangling some of the chicken-and-egg problems of language compilers for new ports is extremely challenging. Perl and Python are pretty much a pre-requisite of the base Debian system, and Christian got them working early on. But for example in May, 247 packages depended on r-base-dev (GNU R) for building, and 736 on ghc, and we did not have these dependencies compiled. Just counting those two, 1k source packages of the remaining 4k to 5k to be compiled for the new architecture would have to wait for a long time. Then there was Java, Mono, etc... Even more worrying problems were the pending issues with the toolchain, like atomics in glibc, or make check failing for some packages in the clean repository built with wanna-build. Christian continued to work on the toolchain and liasing with the rest of the OpenRISC community, I continued to request more changes to the Debian archive through a few requests to use autoreconf, and pushing a few more NMUs. Though many requests were attended, I soon got negative replies/reactions and backed off a bit. In the meantime, the porters of other new architectures at the time were mostly submitting requests to support them and not NMUing much either. Upstreaming Things continued more or less in the same state until the end of the summer. The new ports needed as many packages built as possible before the evaluation of which official ports to accept (in early September, I think, the final decision around the time of the freeze). Porters of the other new architectures (and maintainers, and other helpful Debian Developers) were by then more active in pushing for changes, specially remaining autoreconf issues, many of which benefited or1k. As I said before, I also kept pushing NMUs now and then, specially during summer, for packages which were not of immediate benefit for our port but helped the others (e.g. ppc64el needed updates to ltmain.sh for libtool which were not necessary for or1k, in addition to config. guess,sub ). In parallel in the or1k camp, there were patches that needed changes to be sent upstream, like for example Python's NumPy, that I submitted in May to the Debian package and upstream, and was uploaded to Debian in September with a new upstream release. Similar paths were followed between May and September for packages such as jemalloc, ocaml, gstreamer0.10, libgc, mesa, X.org's cf module and cmake (patch created by Christian). In April, Christian had reached the amazing milestone of tracking and getting all of the contributors of the port of GNU binutils to assign copyright to the Free Software Foundation (FSF), all of the work was refreshed and upstreamed. In July or August, he started to gather information about the contributors of the GCC port, which had started more than a decade ago. After that, nothing much happened (from the outside) until the end of the year, when Christian sent a message about the status of upstreaming GCC to the OpenRISC community. There was only one remaining person to assign the copyright to the FSF, but it was a blocker. In addition, there was the need to find one or more maintainers to liaise with upstream, review the patches, fix the remaining failures in the test suite and keeping the port in good shape. A few months after that and from what I could gather, the status remains the same. Current Status, and The Future? In terms of the Debian port, there have not been huge visible changes since the end of the summer, and not only because of the Jessie freeze. It seems that for this effort to keep going forward and be sustainable, sorting out the issues with GCC and Glibc is essential. That means having the toolchain completely pushed upstream and in good shape, and particularly completing the copyright assignment. Debian will not accept private forks of those essential packages without a very good reason even in unofficially supported ports; and from the point of view of porters, working in the remaining not-yet-built packages with continuing problems in the toolchain is very frustrating and time-consuming. Other than that, there is already a significant amount of software available that could run in an or1k system, so I think that overall the project has achieved a significant amount of success. Granted, KDE and LibreOffice are not available yet, neither are the tools depending on Haskell or Java. But a lot of software is available (including things high in the stack, like XFCE), and in many aspects it should provide a much more functional system that the one available in Linux (or other free software) systems in the late 1990s. If the blocking issues are sorted out in the near future, the effort needed to get a very functional port, on par with the unofficial Debian ports, should not be that big. In my opinion, and looking at the big picture, not bad at all for an architecture whose hardware implementation is not easy to come by, and in which the port was created almost solely with simulators. That it has been possible to get this far with such meagre resources, it's an amazing feat of Free Software and Debian in particular. As for the future, time will tell, as usual. I will try to keep you posted if there is any significant change in the future.

2 April 2015

Paul Tagliamonte: Oatmeal Raisin Cookies

Oatmeal Raisin Cookies: paultagskitchen:
DELICIOUS COOKIE PHOTOIngredients
  • cups soylent
  • 1 cups rolled oats
  • cup sugar (white & dark brown)
  • cup flour
  • cup raisins
  • tsp baking soda & powder
  • tsp salt
  • 1 stick butter (roomtemp - NOT melted. Don t even try that. Stop. You. I see you.)
  • 1 egg
  • 1 tsp vanilla
Assembly Combine butter,

20 March 2015

Zlatan Todori : Interviews with FLOSS developers: Laura Arjona

One of fresh additions to Debian, that is showing Debian's commitment to diversity in all fields is Laura Arjona Reina. A helpful hand on channels and a great flux of FLOSS energy she brings with herself. Although applied for non-packaging Debian Developer status, Laura does recognize that there are still some technical aspects what must grasp on. Her dedication to FLOSS and trying to solve some of its issues is astonishing, as this woman is doing a lot of self-hosting and system administration. Yes, you read it right - she does all of that and still applied for non-packaging Debian Developer. She is perfect example how FLOSS enhances humans in many ways. Hello Laura. Picture of Laura Who are you? I am Laura Arjona, I work as IT assistant at Technic University of Madrid, I am married and I have a son, and I use and promote free (libre) software both at job and at home and with friends. I have a nice time contributing in Debian and other FLOSS projects but I always want to do more than what I manage to actually do (I hope I can improve that, as time goes by... and maybe when I get retired I am the SuperLArjona that you wrote about!). What parts of FLOSS community are you engaged? I use Debian, and CyanogenMod + F-Droid in my phone. I coordinate the translation of the Debian website into Spanish, help with FSFE website translation too, and translate some other free software (GNU MediaGoblin, F-Droid, Android apps that I use, web services that we use at work...). I use and promote some free social networks: pump.io, GNU Social, and XMPP. My work/friends environment is mostly Windows/Android so I try to find/promote libre software replacements or interesting applications for them. I give free FLOSS stickers to everybody showing interest for libre software, and a nice Debian sticker if they finally install it in their computers. Setup of your main machine? My machine is a humble Compaq Mini 110C laptop (32bits, Atom N270@1.60GHz, 1GB RAM) and I have Debian Jessie (future-stable ATM) with xfce on it. I'm not tied to particular tools, for example I use Mousepad for editing here in my xfce, Kate in my desktop at work, nano in the server. The only "tuning" that I always do is to set a dark background for terminals and text editors, but I don't even switch to a desktop dark theme... (BTW I love Jessie's theme, "Lines"!). I know there are awesome pieces of software out there (hey emacs-org-mode!), but I just don't have fun having to learn them by myself (no LUG near, I'm afraid...). Some memorable moments from Debian conferences? I've only been at Barcelona MiniDebConf Women 2014 and it was great. It was memorable that I promoted the keysigning for that MiniDebConf, and came home with lots of signatures and papers to verify and sign... and then I was not remembering my GPG main key passphrase! so I hid under my desk for two months, and then, decided to start again (created a new key and tried to meet some Debian people in Madrid...). So I guess I should go to some (Mini)DebConf again. You are currently involved in process of becoming non-packaging Debian Developer - what made you take that step? I began translating in 2011, and since then, I enjoyed contributing in Debian (women, l10n-es, website, publicity). I'm quite regular with the translation work, and applying for DD is a plan to 'force' myself to find chunks of time to contribute more in the other areas too. I also believe that applying I may help other people to also apply or get more involved or become more visible. So here I am. Although you applied for non-packaging Debian Developer you recognize that there is still a technical learning curve in Debian even for that - what are the technical aspects a non-Developer should grasp? Well, I suppose it depends on the area you are contributing. In Publicity you find repositories in git (bits.debian.org), and subversion (Debian Project News). The website uses CVS (www.debian.org)... So you need the basics of 3 different version control systems to commit your changes (or send them to the mailing list and wait somebody to commit them). We use a mail robot to coordinate the translation work, so you need to write the subject with a certain format, and some people complains when somebody send mail in HTML (plain text is preferred). There are some other tools such as IRC and GPG that I began using just for contributing to Debian. Once that you learn them a bit and you learn how Debian works, you understand they are the great tools and you get in love (hey meetbot and KGB! hey i18n.debian.org!), but I wonder how people with no technical background, or even Computer Engineering students nowadays, accostumed to instant messaging in the mobile, fancy web interfaces and so on, look at these tools and just don't even try. How do you see future of Debian development? I don't know, Debian is huge... Some areas in which I hope we, as a community, find the way to work more: packaging (or help configuring) web applications or network services, provide LTS support, and keep on improving outreach/diversity. What are your future plans in Debian, what would you like to work on? In the Spanish team area, my plan is to go on translating the website, jump more often into translating package descriptions too, and help first-time-contributors to keep themselves involved. In the website and publicity teams, I hope I manage to put some weekly time to help with pending tasks/bugs, and serve as liaison with the other areas in which I'm involved (women, l10n, contributors...). If I become DD, I would like to create/adopt some data sources for contributors.debian.org, or convince people to do it I'm not sure if I will be able to attend DebConf some year; meanwhile, at least, I'll continue trying to help with the blog and promotion (as -publicity-team member). Why should developers and users join Debian community? What makes Debian a great and happy place? For using it: the desktop experience has improved very much in the last years, there's a clear separation between free and non-free software so the Debian users always know where are we, and there is wide documentation (in English, at least. Probably in other languages too). For getting involved: I like very much that you can lurk what almost everybody does: just join some mailing lists or IRC channels, the Debian people work in the open. So you know a bit where are you jumping in. Later you learn that everything is easier than what was looking from the outside, because you make friends and with friends everything is better.
Contributions made to Debian have many chances to reach a very wide community: Debian users, upstream projects, and the hundreds of derivatives. It's a quite horizontal, decentralized organization (that has its downsides too, but I can live with them). Is there something you would change in FLOSS ecosystem? We need much more internationalization and localization efforts. People don't need English for using libre software nowadays in their desktop, it's one of our big strenghts, but they definitely need English for using libre software for Android, or solving problems with the libre software they use in your computers/devices, or to contribute to any community. I think we need more local groups for user support/outreach, more libre-software-based translation tools and online services (replacements for Google Translator, for Transifex...),and more internationalization and localization efforts (manuals, websites... not only the software itself). If we work hard in this area, we'll gain much more users and much more contributors. Why does privacy matter to you? I have a son, at our family we interchange photos, and sometimes I have private conversations using the smartphone, mail or other internet services. I want to have the chance that the day that I (or my family) need privacy, we can have it easily. And I want that the people that really need privacy today, have proper tools at their hand. So I try to use PGP, selfhost my multimedia website, use decentralized, free software based networks and XMPP mobile apps... to help those projects to thrive. I try do my part of the network effect! You are being upset with rise of Github - why is that and what would change would you like to see? I totally agree with Mako's essay "Free software needs free tools". Yes, many nonfree web services are easier and have better features right now, but the key is that only dogfooding can change that, the same like changed it with the GNU/Linux desktop and Open/LibreOffice for example...
I would like to see more people trying to selfhost, use and promote libre software based forges, so in addition to avoid vendor lock in and win consistency in our discourse, we polish the available tools and eventually win the battle also in the technical side. You are hosting yours own instances of Mediagoblin - as it is not officially packaged in Debian yet, how do you manage it and how would you encourage others to do it? I followed the MediaGoblin documentation for its last stable release, and hanged on the IRC channel when in doubts/problems. It was not so hard, because it's well documented for Debian systems, and most of the dependencies are already packaged (in stable and testing). MediaGoblin is in its way to stretch too (thanks simonft and the rest of people working on this!). I'm documenting my adventures with selfhosting in [my blog (http://larjona.wordpress.com), but I need to write more often, and put more time in my small server (now I try to selfhost my git projects with cgit, and I want to setup an XMPP server and Etherpad Lite too). You are trying to resolve with self-hosting personal issues with services such as WhatsUp and other non-free parts of our everyday lives- what issues are you hitting on during your way and how do you resolve them? "#iloveemail", but people don't love it anymore, it seems... I've researched a bit about instant messaging to try to propose alternatives to WhatsApp to my family and friends. It seems Conversations with a community XMPP server where to create multi user chat rooms can be a replacement, so my plan is to try during this year. Meanwhile, I've setup the MediaGoblin site so I upload the photos there instead of sending them with the phone, and for the 1-to-1 chat I try to move people to Kontalk (instant messaging, GPG, photos, voice notes...). For the videocalls, I promote Jitsi or just point people to meet.jit.si/FancyNameofChatRoom. I have account and owndrive.com and will try to host Owncloud too. We'll see what happens. You are interested in radio shows - what drives you into that field and will we see soon any podcasts from Laura? I like to talk and I'm not a shy person, so the few times that in any of my social groups there was a chance to "talk in the radio", I volunteered and enjoyed. This has been, in my life, 6 or 7 times (in Spanish, talking about social activism or politics. No records, though!). Some months ago the people of "El Binario" invited me to talk at "findenegro" about pump.io and free networks (in Spanish), I accepted and had a very nice time (audios in my mediagoblin). I wish I have more free time to listen to podcasts and maybe to join some other people to participate in a program in a regular basis. OTOH, my son asks for a tale almost each day... I follow one of Gianni Rodari "The grammar of fantasy"'s approach: take some day-to-day facts and add something unexpected and crazy, and tailor a short story. Maybe I could record them and publish in my MediaGoblin... Of course their literary quality is not even near to Gianni Rodari's but people that listened to them when I was storytelling (in the metro, my mother at home, some friends...) say they are fun and interesting. Who knows! Work of Laura's son

28 February 2015

Zlatan Todori : Interviews with FLOSS developers: Joey Hess

Edit: Now translated to Chinese. Thanks zhang wei! There is really hardly a better way to open a series of interviewing with developers behind Free Libre Open Source Software project, then with incredible mind such as Joey Hess. To write his contributions to Free software ecosystem, especially in Debian, would be a book by itself. His impact exceeds even his projects - people literally follow his blog posts to see what he is doing and how is he living. A hacker from cabin. If you really need to have a picture of true hacker, then Joey is the one. As this isn't a book I will just mention few projects that he has been behind - git-annex, ikiwiki, etckeeper, debian installer, parts of dpkg, debhelper, devscripts, taskel. So without further waiting here it is. Picture of Joey Hess me: Who are you? joeyh: I'm Joey -- https://joeyh.name/ me: How did you start programming? joeyh: Atari 130XE which came with BASIC and a boring word processor and not much else. No other friends had one, so the only way to get software was to type in demo programs from manual and then begin to change and write my own. So, the easy way to learn. Also some Logo in school. me: How would you now advise others to start programming? joeyh: Difficult question, it seems much harder to get an intimate understanding of things than when I started, and much harder to be motivated to program when there's so much stuff easily available. Maybe simple bare-metal systems like Arduino coupled with real-world interaction are the answer. I've recently been mentoring my nephew who is learning python and Python the Hard Way has gotten him far impressively fast. me: Setup of your development machine? joeyh: Lenovo laptop de-spywared with Debian unstable, xmonad, xfce, vim. me: Your thoughts on Purism (the open hardware laptop initiative that got recently funded on CrowdSupply)? joeyh: I don't know much about that one, but it seems that consumer level hardware has gotten so low quality, and so closed and untrustworthy that it makes sense to either build alternatives that are open, or pick out, as a community, the stuff we can adapt to our needs and concentrate on it. Several projects are trying, I hope they succeed. me: How do you see future of Debian development? joeyh: Well, I've mostly stopped worrying about it. If you look back at my presentations at the past 2 or 3 DebConfs, you'll find my best thoughts on the matter. me: You retired as Debian developer - do you intend sometime soon to come back and/or do you plan to join some other communities? joeyh: It would be glorious to come back, wouldn't it? But I don't think I will. Can't step in the same river twice, and all. Instead, Debian will probably have to put up with me as an annoying upstream author who doesn't ship tarballs, but does ship debian/ directories, and as a bug reporter who enjoys reporting amusing bugs like -0 NaN. I seem to have more time to spend in other online communities since I left Debian, but in a more diffuse way. Maybe that's just what it's like, to be involved in Free Software but not in the embrace of a big project like Debian. me: Some memorable moments from Debian conferences? joeyh: There are so many! Picnicing on berries and tamales at the Portland farmer's market right outside the venue; rainbows and bonfire in Switzerland after crazy busy days; impromptu pipe organ repair in a weird night venue in Edinburgh; walking through Porto Alegre at night with Ian Murdock and how humble he was about what he'd started; hacking all night in Spain; failing to sleep through midnight sun and incessent partying Finland; hanging out in the hotel lobby in Atlanta where we designed Build-Depends. me: Are you a gamer? Valve Steam games are offered for free to Debian Developers - do you use steam and play Valve games? joeyh: I've played through Half Life and Portal, but nethack has claimed more of my time. I mostly enjoy short, indie games, or games that tell us something new about the medium of games, A recent favorite was A Dark Room. But really, I have more pure fun playing real world Tabletop games with friends, like Carcassanne Discovery and Hive. In March, I am going to try to write a roguelike game in one week, in Haskell, for the Seven Day Roguelike Challenge and I'll be blogging about my progress daily. me: You are nowdays a Haskell hacker (git-annex) - what would you like to say about this language and how does it compare to Python, C, JavaScript, Ruby and Perl? joeyh: Not just git-annex; all my current projects are written in Haskell. I think it's amazing how much we expect programmers to keep in their heads while writing code. Is that buffer going to overflow? Is changing the value of that global variable going to break some other part of the code? Is that input sanitized yet? Did that interface change? Haskell solves some of these outright, but more, it makes you start noticing this kind of pervasive issue, and it provides ways to completely eliminate a class of problems from your code. For example http://joeyh.name/blog/entry/making_propellor_safer_with_GADTs_and_type_families/. The class of bugs I avoided there had never affected my code even once, but it was still worth preventing that whole class of bugs, so I don't have to worry about them ever again. me: Would you suggest Haskell as first language to learn especially for those that have an itch for mathematics? joeyh: I think that can work well. Or it can go other the way -- I had an affinity to mathematics when I was young, but it got knocked out of me in the way that happens to many people, and languages like perl and C don't do much to make you want to learn more about higher-order math. I've been picking up a bit more here and there via Haskell. me: How do you compare your productivity in Haskell compared to your Perl days? joeyh: It's very different; I'm a very different programmer now. I probably would bang out quick hacks more quickly when I was writing Perl. But, they tended to stay quick hacks. Now, I might take a little longer to get there, but the code seems a lot more solid, while also being more malleable to turn into larger or different programs. I'm also a lot more drawn toward writing software libraries. me: Can you describe your philosophy of life (you live in cabin, in forest, using a lot of solar power - many people are intrigued (including myself) what drives you towards that kind of life and how does it impact your overall quality of life and happiness. Looking the todays modern predator capitalistic society, in which you could easily earn more then $10.000 a month, you seem to be an anarchist and very humble human)? joeyh: I want to build worthwhile things that might last. Which is super hard in the world of software, both because it's hard to think far ahead at all, and because most jobs don't emphasize that kind of real value. I've been lucky and bootstrapped up to a point where I've been able to work full time on free software for years, and I'm willing to forgo a lot to continue that. Living in the woods without modern conveniences is great, because it's quiet and you can think as much as you like; the internet is just as close as it is anywhere else (maybe a bit slower); and when you've spent too much time quietly thinking you'll need to go chop wood, or haul water, or jump in the river to cool off, depending on the season. (Humble? Like most programmers, I am internally a flaming tower of ego...)
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31 January 2015

John Goerzen: Home Automation, part 2: Z-Wave and ISY programming

In my part 1 post yesterday, I wrote about the start of the home automation project. I mentioned that I was using Insteon switches, and they mostly were working well (I forgot to mention an annoyance: you can dim, but not totally shut off, their LED status light.) Anyhow, the Insteon battery-operated sensors seem to not be as good as their Z-Wave competition. Setting up Z-Wave Z-Wave devices get joined to the Z-Wave network in much the same way Bluetooth devices get paired with each other. The first time you use a Z-Wave device, you join it to the controller. The controller assigns it an ID on your network, and both devices discover the best route to communicate with each other. I discovered that the Z-Wave module on the ISY-994i has particularly poor reception. Combined with the generally short range of battery-operated Z-wave devices, this meant that my sensors didn t work reliably. As with Insteon, AC-powered Z-wave devices tend to be repeaters, but I didn t have any AC-powered Z-wave devices. I went looking for Z-wave repeaters, and found some. But then I discovered that a Z-wave relay-based appliance switch was actually $5 cheaper, acted as a repeater, and could be used as a switch down the road if needed. A couple of those solved my communications issues. You join them to the network as usual, but then either re-join the battery-powered sensors (so they see the new route) or do a network heal (every device on the network re-learns about its neighbors and routes to the other devices) so they see the new route. Z-Wave Motion / Occupancy Sensors If you have been in new buildings, chances are you have seen light switches with built-in occupancy sensors. My doctor s office has these. They are typically the same size as a regular light switch, but with a passive infrared (PIR) motion sensor used to automatically turn the lights off after a timeout (or even on, when someone walks into the room.) These work fine for small rooms, but if you ve ever been in a bathroom with a PIR lightswitch that goes off while you re still in the room, you are aware of their faults for larger rooms! Most of the time, when you read about occupancy sensors , it s really a PIR sensor, and the term is used interchangeably with motion detector. Motion detectors in home automation systems are commonly used for a number of purposes: detecting occuption of rooms for automatic control of lighting or HVAC systems, triggering alerts, or even locking or unlocking doors. My friend told me he had poor luck with the Insteon PIR sensors, so I tried two different Z-Wave models: the $48 Aeon/Aeotec multi-sensor and the $30 Ecolink PIRZWAVE2-ECO. The Aeon device is clearly the more capable; it can be used indoors or out, and has a lot of options that can be configured by Z-Wave configuration parameters. It also has a ball/socket mount, so it can be easily aimed in different directions. It can draw power from 4 AAA batteries, or a mini USB cable (cable, but not power supply, included). The Aeon multi-sensor also has a temperature, humidity, and illumination (lux) sensor but, as you ll see, they have some drawbacks. The Ecolink device is more basic; it has a few settings that can be altered via jumpers, but none that can be altered via Z-Wave configuration commands. That makes it a bit of a hassle, since you have to open it up to change, and when you do, it triggers a tamper alarm that is both undocumented and never seems to go away. It is powered by a single CR123A 3V Lithium battery, which are about $2 each on Amazon. Both units have a default PIR timeout of 4 minutes. That means that after sensing motion, they will transmit the on signal (meaning motion detected) and then transmit no further signals for at least 4 minutes. This is because operating the radio consumes far more battery power than simply monitoring the PIR sensor, and it cuts down on repeated on/off transmissions. In this configuration, both units should have battery life of 6 months to a year, I figure, with an edge for the Ecolink, perhaps. Both can also be configured to transmit more frequently; the Ecolink has a jumper that can change its timeout to 10 seconds, whereas the Aeon can be configured over Z-Wave for any timeout between 10 seconds and 65535 seconds (values above 4 minutes are rounded to the nearest minute, for some reason.) Both also have adjustable sensitivity; on the Aeon this is via an adjustment knob, and on the Ecolink it s via jumpers. And both can report their battery level to enable software alerts when it s getting low. The Aeon ships with its temperature, humidity, battery, and lux sensors disabled. This appears to be the cause of much confusion online, as they send one transmission and then no more. Sadly, one has to resort to the hard-to-find but very helpful MultiSensor engineering spec document to figure out the way to enable those sensors and set their interval. (It must be said, however, that I doubt most consumers will understand how to set bitfields, and this is either not covered or covered incorrectly in their other manuals.) This can be a real power drain, so I just set it to report battery level every 6 hours (so I can alert myself if it gets low) and leave it at that. The Ecolink manual claims a detection radius of 39 feet and a total angle of 90deg (45deg left or right from center) and a 3-year battery life (I m skeptical). It also is rated for indoor use only. Aeotec claims a detection radius of 16 feet and a total angle of 120 deg. Be skeptical of all these figures. Once set up with good reception, both devices have been working fine. Programming the controller The ISY-994i-Zw Pro controller I mentioned in Part 1 has its own sort of programming language. It s a lot better than the sort of GUI clicky mess that is found in most of these things, but it still has a sort of annoying Java-based editor where you select keywords from a menu and such. Although you can backup and restore the device, and import and export the programs, the file formats are XML and not really suitable for hand-editing. Sigh. The language is limited, but gets the job done. Here is a simple program that turns off the fan in a bathroom 30 minutes after the light was turned off:
If
        Status  '1st Floor / Bathroom + Laundry / Main Bath Fan' is On
    And Status  '1st Floor / Bathroom + Laundry / Main Bath Light' is Off
 
Then
        Wait  30 minutes 
        Set '1st Floor / Bathroom + Laundry / Main Bath Fan' Off
 
Else
   - No Actions - (To add one, press 'Action')
The if/then/else clauses should probably be more properly called when/do/finally. The if clauses are evaluated whenever a relevant event occurs. If the If evaluates to true, if executes the Then section. The program in Then is uninterruptible except for wait and repeat statements. So in this case, the program begins, and if the light stays off and the fan stays on, 30 minutes later it turns off the fan. But if the light comes back on, the program aborts (since there is nothing in else ). Similarly, if the fan goes off, the program aborts. A more complicated example: motion-activated lamp There is a table lamp in our living room controlled by Insteon. By adding a motion sensor in that room, it can be automatically turned on by someone walking through the room. Now, to be useful, I don t want it to turn on during the day. I also don t want it to turn on or adjust itself if other lights are on in the room, or if I turned it on myself; that could cause it to go on and off while I m watching TV, for instance. It s just to be helpful at night. Because the ISY-994i is pretty limited, having almost no control flow operations, this as with many tasks requires several programs . First, here s my main :
If
        Status  '1st Floor / Living + Dining Room / LR Table Lamp' is Off
    And $LR_Lamp_Lockout is 0
    And Status  '1st Floor / Living + Dining Room / ZW 005 Binary Sensor' is On
    And From    Sunset 
        To      Sunrise (next day)
    And $LR_Lamp_Motion_Working is not 0
    And Status  '1st Floor / Living + Dining Room / LR Floor Lamp' is Off
    And Status  '1st Floor / Living + Dining Room / Dining Light' is Off
    And Status  '1st Floor / Living + Dining Room / LR Light' is Off
 
Then
        Set '1st Floor / Living + Dining Room / LR Table Lamp' 22%
        Set '1st Floor / Living + Dining Room / LR S Remote (Table Lamp)' 22%
 
Else
   - No Actions - (To add one, press 'Action')
So, let s look at the conditions. This program triggers if the lamp is off, the sensor is on, the time is between sunset and sunrise, and three other lights are off. (I will explain the lockout and motion_working variables later). If this is the case, it sets the lamp to 22% (and also informs the wall switch for it that the lamp is at 22%). I pick this precise value because it is unlikely I would manually set it via the wall switch, and therefore lamp is 22% bright doubles as a lamp was turned on by this program flag. So this is the turning the lamp on bit. Let s look at the program that turns it back off later:
If
        Status  '1st Floor / Living + Dining Room / LR Table Lamp' is 22%
    And (
             Status  '1st Floor / Living + Dining Room / ZW 005 Binary Sensor' is Off
          Or $LR_Lamp_Motion_Working is 0
          Or Status  '1st Floor / Living + Dining Room / LR Light' is not Off
          Or Status  '1st Floor / Living + Dining Room / LR Floor Lamp' is not Off
          Or Status  '1st Floor / Living + Dining Room / Dining Light' is not Off
        )
 
Then
        Wait  15 seconds
        Set '1st Floor / Living + Dining Room / LR S Remote (Table Lamp)' Off
        Set '1st Floor / Living + Dining Room / LR Table Lamp' Off
 
Else
   - No Actions - (To add one, press 'Action')
 
This is using a sensor with a 4-minute timeout, so the lamp will always be on for at least 4 minutes and 15 seconds. This program runs if the lamp is still at the program-set level (so if, for instance, I turned the lamp full on, the program does nothing to override my setting.) Then, it looks for a condition to trigger turning the lamp off, which could be any of the sensor indicating no more motion, another program detecting it s lost communication with the sensor, or somebody turning on one of the bigger lights in the room. Then it simply sets the light (and the wall switch controlling it) to off. There are a couple more bits to this puzzle. What if the system turned the lamp on, but I really want it off? If I walked up to the wall switch and pushed off , the lamp would go off. And then, a couple seconds later, come back on, since the state of the system met the conditions for the lamp-on program. So we need a lockout that prevents this from happening. Here s my trigger lockout program:
If
        Control '1st Floor / Living + Dining Room / LR Table Lamp' is switched Off
     Or Control '1st Floor / Living + Dining Room / LR Table Lamp' is switched Fast Off
     Or Control '1st Floor / Living + Dining Room / LR S Remote (Table Lamp)' is switched Fast Off
     Or Control '1st Floor / Living + Dining Room / LR S Remote (Table Lamp)' is switched Off
 
Then
        $LR_Lamp_Lockout += 1
        Run Program 'LR Lamp Clear Lockout' (If)
 
Else
   - No Actions - (To add one, press 'Action') 
So if someone pushes the off button at the lamp switch box at the outlet it s plugged into (unlikely), or at the wall switch, it increments the lockout variable and runs another program. This other program is unique in that it is flagged disabled , meaning it is never run automatically by the system, only when called by another program. Here s the clear lockout program:
If
        $LR_Lamp_Lockout > 0
 
Then
        Wait  5 minutes 
        $LR_Lamp_Lockout  = 0
 
Else
   - No Actions - (To add one, press 'Action')
Thus by pushing the off button on the switch, the motion-triggered program won t turn the lamp back on for at least 5 minutes. Before I had reliable Z-Wave communication to the device, I had some times where it would simply drop off the Z-Wave network until a reboot. This was particularly annoying if it occured after having detected motion, since the state of the sensor in the ISY controller is simply whatever state it last received. Therefore, I wrote this program to check if it believes the motion sensor is working:
If
        Status  '1st Floor / Living + Dining Room / ZW 005 Binary Sensor' is On
 
Then
        $LR_Lamp_Motion_Working  = 1
        Wait  1 hour 
        $LR_Lamp_Motion_Working  = 0
 
Else
        $LR_Lamp_Motion_Working  = 1
We don t really care if the motion sensor is broken when the status is off; all that happens then is no lamp turns on. So this program activates when the status is set to on. It flips the working flag to true, then waits for an hour. If the sensor shows no motion within that hour, the program skips to the else (keeping the flag true). But if it is still on after an hour, it decides it must not be working and sets the working flag to false. You can see that flag used in the other programs logic. But because of the Else, which is run whenever the conditions that caused the Then clause to run become false, as soon as the system receives no motion , it will flag the sensor as working again. The final piece to this puzzle is a program flagged to run at boot time of the controller:
If
   - No Conditions - (To add one, press 'Schedule' or 'Condition')
 
Then
        $LR_Lamp_Motion_Working  = 1
 
Else
   - No Actions - (To add one, press 'Action')
This simply initializes the motion working variable to a known state. Keypads The Insteon KeypadLinc is a nice device. It can control a single load directly, but all 8 buttons are fully responsive in the Insteon system. They each also have individually-addressible LED backlights. They are commonly used to do things like ALL OFF , TV (to set lights for watching TV), AWAY (to set the system for everyone being out of the house for awhile), etc. They are the size of a regular Decora switch, and I have installed one already, but haven t programmed much of it yet. REST API The ISY has an extensive REST API, which I ve used to integrate it a bit with my Debian systems. More on that another time. Mobile app Mobile apps are a common thing people look for in these systems. You can t use the Insteon app with the ISY, but they recommend Mobilinc Pro. It does the job. Mobilinc tries to sell a $10/mo connection service, which is totally unnecessary if you can figure out SSL, and has on-screen buttons to bypass, but judging by the Google Play reviews, a lot of people thought they had to pay for that and uninstalled it afterwards. Future directions Many people put in electronic door locks. I don t plan to do that. I do plan to have the house systems be aware of the general state of things (is the house empty? is everyone asleep?) and do appropriate things with lighting and HVAC. I don t really expect the savings in power for lighting control to pay for the system anytime soon. However, if it can achieve some savings in heating and cooling, it may well be able to pay for itself in a few years. So my big next step is thermostats that can integrate with all this. I have had a water mess in my basement before, and water leak sensors are a very common item people deploy in these setups. I certainly plan to add a few of them. Door-open sensors are also useful; they trigger more instantly and reliably than motion detectors and can be used in some nice ways (is it after dark and the door is opening when the house is vacant? If so, turn on the light nearby in case their hands are full.) Issues Some issues I ran into so far are already discussed above. One other major one involves SSL on the ISY-994i Pro. The method for adding SSL keys is cumbersome, but the processor on the device which appears to run some sort of Java is just not up to working with SSL. Apparently they only recently got it fast enough to work with 2048-bit keys. This is rather undocumented, though, so I obtained a cert for a 4096-bit key, my usual. Attempting to connect to the box with SSL appeared to hang not just that but confuse a lot of other things on it as well. Turned out it wasn t hung; it just too a minute and 45 seconds to complete the SSL handshake. Moral of the story: use 2048-bit keys, or stunnel4 or some such to re-wrap the SSL communications with a stronger key. The KeypadLinc backlights can be completely shut off, and both their on and off levels can be customized. I have it set to shut off the backlight during the day and turn it on at night. The wall switches, however, can t have their brightness status LED bar entirely shut off. They can be made dim, but don t ever go away. That s rather annoying. Also annoying is that Insteon doesn t make switches in the traditional toggle switch style in colors other than white. As our house had mostly black switches, I was forced into the Decora style. Overall thoughts This has been a great learning experience for me in a number of ways. I have only begun to tap what the system can do, and the real benefits will probably come once I get the heating and cooling into the mix. It s quite a nice way for a geek to go, and the improvements in lighting have also been popular with everyone else in the house.

John Goerzen: First Steps with Home Automation and LED Lighting

I ve been thinking about home automation automating lights, switches, thermostats, etc. for years. Literally decades, in fact. When I was a child, my parents had a RadioShack X10 control module and one or two target devices. I think I had fun giving people a light show turning on or off one switch and one outlet remotely. But I was stuck there are a daunting number of standards for home automation these days. Zigbee, UPB, Z-Wave, Insteon, and all sorts of Wifi-enabled things that aren t really compatible with each other (hellooooo, Nest) or have their own ecosystem that isn t all that open (helloooo, Apple). Frankly I don t think that Wifi is a great home automation protocol; its power drain completely prohibits it being used in a lot of ways. Earlier this month, my awesome employer had our annual meeting and as part of that our technical teams had some time for anyone to talk about anything geeky. I used my time to talk about flying quadcopters, but two of my colleagues talked about home automation. I had enough to have a place to start, and was hooked. People use these systems to do all sorts of things: intelligently turn off lights when rooms aren t occupied, provide electronic door locks (unlockable via keypad, remote, or software), remote control lighting and heating/cooling via smartphone apps, detect water leakage, control switches with awkward wiring environments, buttons to instantly set multiple switches to certain levels for TV watching, turning off lights left on, etc. I even heard examples of monitoring a swamp cooler to make sure it is being used correctly. The possibilities are endless, and my geeky side was intrigued. Insteon and Z-Wave Based on what I heard from my colleagues, I decided to adopt a hybrid network consisting of Insteon and Z-Wave. Both are reliable protocols (with ACKs and retransmit), so they work far better than X10 did. Both have all sorts of controls and sensors available (browse around on smarthome.com for some ideas). Insteon is a particularly interesting system an integrated dual-mesh network. It has both powerline and RF signaling, and most hardwared Insteon devices act as repeaters for both the wired and RF network simultaneously. Insteon packets contain a maximum hop count that is decremented after each relay, and the packets repeat in such as way that they collide and strengthen one another. There is no need to maintain routing tables or anything like that; it simply scales nicely. This system addresses all sorts of potential complexities. It addresses the split-phase problem of powerline-only systems, but using an RF bridge. It addresses long distances and outbuildings by using the powerline signaling. I found it to work quite well. The downside to Insteon is that all the equipment comes from one vendor: Insteon. If you don t like their thermostat or motion sensor, you don t have any choice. Insteon devices can be used entirely without a central controller. Light switches can talk to each other directly, and you can even set them up so that one switch controls dozens of others, if you have enough patience to go around your house pressing tiny set buttons. Enter Z-Wave. Z-Wave is RF-only, and while it is also a mesh network, it is source-routed, meaning that if you move devices around, you have to heal your network as all your nodes have to re-learn the path to each other. It also doesn t have the easy distance traversal of Insteon, of course. On the other hand, hundreds of vendors make Z-Wave products, and they mostly interoperate well. Z-Wave is said to scale practically to maybe two or three dozen devices, which would have been an issue for me, buut with Insteon doing the heavy lifting and Z-Wave filling in the gaps, it s worked out well. Controlling it all While both Insteon (and, to a certain extent, Z-Wave) devices can control each other, to really spread your wings, you need more centralized control. This lets you have programs that do things like if there s motion in the room on a weekday and it s dark outside, then turn on a light, and turn it back off 5 minutes later. Insteon has several options. One, you can buy their power line modem (PLM). This can be hooked up to a PC to run either Insteon s proprietary software, or something open-source like MisterHouse, written in Perl. Or you can hook it up to a controller I ll mention in a minute. Those looking for a fairly simpe controller might get the Insteon 2242-222 Hub, which has the obligatory smartphone app and basic schedules. For more sophisticated control, my friend recommended the ISY-994i controller. Not only does it have a lot more capable programming language (though still frustrating), it supports both Insteon and Z-Wave in an integrated box, and has a comprehensive REST API for integrating with other things. I went this route. First step: LED lighting I began my project by replacing my light bulbs with LEDs. I found that I could get Cree 4-Flow 60W equivs for $10 at Home Depot. They are dimmable, a key advantage over CFL, and also maintain their brightness throughout their life far better. As I wanted to install dimmer switches, I got a combination of Cree 60W bulbs, Cree TW bulbs (which have a better color spectrum coverage for more true colors), and Cree 100W equiv bulbs for places I needed more coverage. I even put in a few LED flood lights to replace my can lights. Overall I was happy with the LEDs. They are a significant improvement over the CFLs I had been using, and use even less power to boot. I have had issues with three Cree bulbs, though: one arrived broken, and two others have had issues such as being quite dim. They have a good warranty, but it seems their QA could be better. Also, they can have a tendency to flickr when dimmed, though this plagues virtually all LED bulbs. I had done quite a bit of research. CNET has some helpful brightness guides, and Insteon has a color temperature chart. CNET also had a nifty in-depth test of LED bulbs. Second step: switches Once the LED bulbs were in place, I was then able to start installing smart switches. I picked up Insteon s basic switch, the SwitchLinc 2477D at Menard s. This is a dimmable switch and requires a neutral wire in the box, but acts as a dual-band repeater for the system as well. The way Insteon switches work, they can be standalone, or controllers, responders, or both in a scene . A scene is where multiple devices act together. You can create virtual 3-way switches in a scene, or more complicated things where different lights are turned on at different levels. Anyhow, these switches worked out quite well. I have a few boxes where there is no neutral wire, so I had to use the Insteon SwitchLinc 2474D in them. That switch is RF-only and is supposed to have a minimum load of 20W, though they seemed to work OK albeit with limited range and the occasional glitch with my LEDs. There is also the relay-based SwitchLinc 2477S for use with non-dimmable lights, fans, etc. You can also get plug-in modules for controlling lamps and such. I found the Insteon devices mostly lived up to their billing. Occasionally I could provoke a glitch by changing from dimming to brightening in rapid succession on a remote switch controlling a load on a distant one. Twice I had to power cycle an Insteon switch that got confused (rather annoying when they re hardwared). Other than that, though, it s been solid. From what I gather, this stuff isn t ever quite as reliable as a 1950s mechanical switch, but at least in this price range, this is about as good as it gets these days. Well, this post got quite long, so I will have to follow up with part 2 in a little while. I intend to write about sensors and the Z-Wave network (which didn t work quite as easily as Insteon), as well as programming the ISY and my lessons learned along the way.

27 January 2015

Jingjie Jiang: Yet another post.

In the middle of OPW internship I originally thought taking part in FOSSOPW is a great chance to lift my coding skills and I shouldn t miss it. As time passes by, I now have a new thought towards it. # 1 It do improves your coding skill. Zack, Matthieu and I often have discussions on coding style. For example, once Zack said, For code like this, you should explicitly use an if/else clause, not if-return. I was totally unaware of this sort of issue. Actually I even didn t know how I should call this problem. Matthieu gave me a detailed FYI link on this in no time. Besides, my completeness of thinking is also trained. Recently, I was fixing a HTTP GET Method ?suite=suite-name issue. It s a trivial task. And you know most trivial tasks require lots of scattered modification on the source code base. I did have fixed most places, such as the pages of /src/packagename and /search/ . Zack did a thorough review, and pointed out that the pages rendered by /prefix has some malformed urls in the HTML. Waiiiit, I should have noticed it. But somehow I missed it. Maybe because my mind was wandering at that time? This made me think, I shall have a thorough view of what I should do before getting my hands dirty. Or more preferably, if I could write down what I exactly want to achieve before coding, then silly problems definitely wouldn t occur. This may sound a little bit like TDD. ;). # 2 It makes you look like a (not-that-good) ninja. I use a macbook. It s not my fault! I ve tried several times, but I never successfully find a laptop that is not capable of boiling eggs when running Debian. (and especially KDE+Debian). So I have no way but switched to OSX. The development of Debsources happens on a remote Ubuntu LTS (now Debian SID, haha) virtual machine. Of course I have to install all the dependency on my own, e.g., Postgres, set up port-forwarding, e.g., ssh -D, write automate shell scripts, e.g., dash, but more importantly, I am forced to live under the dark terminal with no GUI. You know the feeling when pain hurts? Yes, exactly! But I survived. How shall I call myself now? A dedicated with-a-lot-of-useless-plugin-installed vimmer? A fond-of-fancy-window tmux-er? Yep, both. I finally found a comfort zone under the black-white-blinking screen. I wonder how people feel when they see a girl hanging out in the library, facing a full-screened black console, typing at a speed of 140wpm (Yeah, I am kidding). I don t know, but please don t call me a geek. Show me your respect, I am a ninja! # 3 It tells you communication is the most important. I bet anyone who has participated in a group-based project would understand what I mean. For one perspective, communication helps to eliminate misunderstanding. So I won t doing some useless stuff for all day and finally find out that it totally doesn t meet the requirement. On the other hand, it speeds up your learning process. I often have problems on git. So in the email I will complain if I mess up with the git repo. After a short while, my dear mentors will reply in detail on how to correctly do the git stuff. My OPW journey is cool! ;).

23 January 2015

Jaldhar Vyas: Mini-Debconf Mumbai 2015

Last weekend I went to Mumbai to attend the Mini-Debconf held at IIT-Bombay. These are my impressions of the trip. Arrival and Impressions of Mumbai Getting there was a quite an adventure in itself. Unlike during my ill-fated attempt to visit a Debian event in Kerala last year when a bureaucratic snafu left me unable to get a visa, the organizers started the process much earlier at their end this time and with proper permissions. Yet in India, the wheels only turn as fast as they want to turn so despite their efforts, it was only literally at the last minute that I actually managed to secure my visa. I should note however that Indian government has done a lot to improve the process compared to the hell I remember from, say, a decade ago. It's fairly straightforward for tourist visas now and I trust they will get around to doing the same for conference visas in the fullness of time. I didn't want to commit to buying a plane ticket until I had the visa so I became concerned that the only flights left would be either really expensive or on the type of airline that flies you over Syria or under the Indian Ocean. I lucked out and got a good price on a Swiss Air flight, not non-stop but you can't have everything. So Thursday afternoon I set off for JFK. With only one small suitcase getting there by subway was no problem and I arrived and checked in with plenty of time. Even TSA passed me through with only a minimal amount of indignity. The first leg of my journey took me to Zurich in about eight hours. We were only in Zurich for an hour and then (by now Friday) it was another 9 hours to Mumbai. Friday was Safala Ekadashi but owing to the necessity of staying hydrated on a long flight I drank a lot of water and ate some fruit which I don't normally do on a fasting day. It was tolerable but not too pleasant; I definitely want to try and make travel plans to avoid such situations in the future. Friday evening local time I got to Mumbai. Chhattrapati Shivaji airport has improved a lot since I saw t last and now has all the amenities an international traveller needs including unrestricted free wifi (Zurich airport are you taking notes?) But here my first ominous piece of bad luck began. No sign of my suitcase. Happily some asking around revealed that it had somehow gotten on some earlier Swiss Air flight instead of the one I was on and was actually waiting for me. I got outside and Debian Developer Praveen Arimbrathodiyil was waiting to pick me up. Normally I don't lke staying in Mumbai very much even though I have relatives there but that's because we usually went during July-August the monsoon season when Mumbai reverts back to the swampy archipelago it was originally built on. This time the weather was nice, cold by local standards, but lovely and spring-like to someone from snowy New Jersey. There have been a lot of improvements to the road infrastructure and people are actually obeying the traffic laws. (Within reason of course. Whether or not a family of six can arrange themselves on one Bajaj scooter is no business of the cops.) The Hotel Tuliip (yes, two i's. Manager didn't know why.) Residency where I was to stay while not quite a five star establishment was adequate for my needs with a bed, hot water shower, and air conditioning. And a TV which to the bellhops great confusion I did not want turned on. (He asked about five times.) There was no Internet access per se but the manager offered to hook up a wireless router to a cable. Which on closer inspection turned out to have been severed at the base. He assured me it would be fixed tomorrow so I didn't complain and decided to do something more productive thank checking my email like sleeping. The next day I woke up in total darkness. Apparently there had been some kind of power problem during the night which tripped a fuse or something. A call to the front desk got them to fix that and then the second piece of bad luck happened. I plugged my Thinkpad in and woke it up from hibernation and a minute later there was a loud pop from the power adapter. Note I have a travel international plug adapter with surge protector so nothing bad ought to have happened but the laptop would on turning on display the message "critical low battery error" and immediately power off. I was unable to google what that meant without Internet access but I decided not to panic and continue getting ready. I would have plenty of opportunity to troubleshoot at the conference venue. Or so I thought... I took an autorickshaw to IIT. There also there have been positive improvements. Being quite obviously a foreigner I was fully prepared to be taken along the "scenic route." But now there are fair zones and the rickshaws all have (tamperproof!) digital fare meters so I was deposited at the main gate without fuss. After reading a board with a scary list of dos and don'ts I presented myself at security only to be inexplicably waved through without a second glance. Later I found out they've abandoned all the security theatre but not got around to updating the signs yet. Mumbai is one of the biggest, densely populated cities in the world but the IIT campus is an oasis of tranquility on the shores of Lake Powai. It's a lot bigger than it looked on the map so I had to wander around a bit before I reached the conference venue but I did make for the official registration time. Registration I was happy to meet several old friends (Such as Kartik Mistry and Kumar Appiah who along with Praveen and myself were the other DDs there,) people who I've corresponded with but never met, and many new people. I'm told 200+ people registered altogether. Most seemed to be students from IIT and elsewhere in Mumbai but there were also some Debian enthusiasts from further afield and most hearteningly some "civilians" who wanted to know what this was all about. With the help of a borrowed Thinkpad adapter I got my laptop running again. (Thankfully, despite the error message, the battery itself was unharmed.) However, my streak of bad luck was not yet over. It was that very weekend that IIT had a freak campus-wide network outage something that had never happened before. And as the presentation for the talk I was to give had apparently been open when I hibernated my laptop the night before, the sudden forced shutdown had trashed the file. (ls showed it as 0 length. An fsck didn't help.) I possibly had a backup on my server but with no Internet access I had no way to retrieve it. I still remained cool. The talk was scheduled for the second day so I could recover it at the hotel. Keynotes Professor Kannan Maudgalya of the FOSSEE (Free and Open Source Software for Education) Project which is part of the central government Ministry for Human Resource Development spoke about various activities of his project. Of particular interest to us are: FOSSEE is well funded, backed by the government and has enthusiastic staff so we should be seeing a lot more from them in the future. Veteran Free Software activist Venky Hariharan spoke about his experiences in lobbying the government on tech issues. He noted that there has been a sea change in attitudes towards Linux and Open source in the bureacracy of late. Several states have been aggressively mandating the use of it as have several national ministries and agencies. We the community can provide a valuable service by helping them in the transition. They also need to be educated on how to work with the community (contributing changes back, not working behind closed doors etc.) Debian History and Debian Cycle Shirish Agarwal spoke about the Debian philosophy and foundational documents such as the social contract and DFSG and how the release cycle works. Nothing new to an experienced user but informative to the newcomers in the audience and sparked some questions and discussion. Keysigning One of my main missions in attending was to help get as many isolated people as possible into the web of trust. Unfortunately the keysigning was not adequately publicized and few people were ready. I would have led them through the process of creating a new key there and then but with the lack of connectivity that idea had to be abandoned. I did manage to sign about 8-10 keys during other times. Future Directions for Debian-IN BOF I led this one. Lots of spirited discussion and I found feedback from new users in particular to be very helpful. Some take aways are: Lil' Debi Kumar Sukhani was a Debian GSoC student and his project which he demonstrated was to be able to install Debian on an Android phone. Why would you want to do this? Apart from the evergreen "Because I can", you can run server software such as sshd on your phone or even use it as an ARM development board. Unfortunately my phone uses Blackberry 10 OS which can run android apps (emulated under QNX) but wouldn't be able to use this. When I get a real Android phone I will try it out. Debian on ARM Siji Sunny gave this talk which was geared more towards hardware types which I am not but one thing I learned was thee difference between all the different ARM subarchitectures. I knew Siji first from a previous incarnation when he worked at CDAC with the late and much lamented Prof. R.K. Joshi. We had a long conversation about those days. Prof. Joshi/CDAC had developed an Indic rendering system called Indix which alas became the Betamax to Pango's VHS but he was also very involved in other Indic computing issues such as working with the Unicode Consortium and the preseration of Sanskrit manuscripts which is also an interest of mine. One good thing that cameout of Indix was some rather nice fonts. I had thought they were still buried in the dungeons of CDAC but apparently they were freed at one point. That's one more thing for me to look into. Evening/Next morning< My cousin met me and we had a leisurely dinner together. It was quite late by the time I got back to the hotel. FOSSEE had kindly lent me one of their tablets (which incidently are powerful enough to run LibreOffice comfortably.) so I thought I might be able to quickly redo my presentation before bedtime. Well, wouldn't you know it the wifi was not fixed. As I should have guessed but all the progress I'd had made me giddily optimistic. There was an option of trying to find an Internet cafe in a commercial area 15-20 minutes walk away. If this had been Gujarat I would have tried it but although I can more or less understand Hindi I can barely put together two sentences and Marathi I don't know at all. So I gave up that idea. I redid the slides from memory as best I could and went to sleep. In the morning I checked out and ferried myself and my suitcase via rickshaw back to the IIT campus. This time I got the driver to take me all the way in to the conference venue. Prof. Maudgalya kindly offered to let me keep the tablet to develop stuff on. I respectfully had to decline because although I love to collect bits of tech the fact it is it would have just gathered dust and ought to go to someone who can make a real contribution with it. I transferred my files to a USB key and borrowed a loaner laptop for my talk. Debian Packaging Workshop While waiting to do my talk I sat in on a workshop Praveen ran taking participants through the whole process of creating a Debian package (a ruby gem was the example.) He's done this before so it was a good presentation and well attended but the lack of connectivity did put a damper on things. Ask Me Anything It turned out the schedule had to be shuffled a bit so my talk was moved later from the announced time. A few people had already showed up so I took some random questions about Debian from them instead. GNOME Shell Accessibility With Orca Krishnakant Mane is remarkable. Although he is blind, he is a developer and a major contributor to Open Source projects. He talked about the Accessibility features of GNOME and compared them (favorably I might add) with proprietary screen readers. Not a subject that's directly useful to me but I found it interesting nonetheless. Rust: The memory safe language Manish Goregaokar talked about one of the new fad programming languages that have gotten a lot of buzz lately. This one is backed by Mozilla and it's interesting enough but I'll stick with C++ and Perl until one of the new ones "wins." Building a Mail Server With Debian Finally I got to give my talk and, yup, the video out on my borrowed laptop was incompatible with the projector. A slight delay to transfer everything to another laptop and I was able to begin. I talked about setting up BIND, postfix, and of course dovecot along with spamassassin, clamav etc. It turned out I had more than enough material and I went atleast 30 minutes over time and even then I had to rush at the end. People said they liked it so I'm happy. The End I gave the concluding remarks. Various people were thanked (including myself) mementos were given and pictures were taken. Despite a few mishaps I enjoyed myself and I am glad I attended. The level of enthusiasm was very high and lessons were learned so the next Debian-IN event should be even better. My departing flight wasn't due to leave until 1:20AM so I killed a few hours with my family before the flight. Once again I was stopping in Zurich, this time for most of a day. The last of my blunders was not to take my coat out of my suitcase and the temperature outside was 29F so I had to spend that whole time enjoing the (not so) many charms of Zurich airport. Atleast the second flight took me to Newark instead of JFK so I was able to get home a little earlier on Monday evening, exhausted but happy I made the trip.

27 December 2014

Benjamin Mako Hill: My Government Portrait

A friend recently commented on my rather unusual portrait on my (out of date) page on the Berkman website. Here s the story. I joined Berkman as a fellow with a fantastic class of fellows that included, among many other incredibly accomplished people, Vivek Kundra: first Chief Information Officer of the United States. At Berkman, all the fellows are all asked for photos and Vivek apparently sent in his official government portrait. You are probably familiar with the genre. In the US at least, official government portraits are mostly pictures of men in dark suits, light shirts, and red or blue ties with flags draped blurrily in the background. Not unaware of the fact that Vivek sat right below me on the alphabetically sorted Berkman fellows page, a small group that included Paul Tagliamonte very familiar with the genre from his work with government photos in Open States decided to create a government portrait of me using the only flag we had on hand late one night. fellows_list_subsetThe result shown in the screenshot above and in the WayBack Machine was almost entirely unnoticed (at least to my knowledge) but was hopefully appreciated by those who did see it.

18 December 2014

Mario Lang: deluXbreed #2 is out!

The third installment of my crossbreed digital mix podcast is out! This time, I am featuring Harder & Louder and tracks from Behind the Machine and the recently released Remixes.
  1. Apolloud - Nagazaki
  2. Apolloud - Hiroshima
  3. SA+AN - Darksiders
  4. Im Colapsed - Cleaning 8
  5. Micromakine & Switch Technique - Ascension
  6. Micromakine - Cyberman (Dither Remix)
  7. Micromakine - So Good! (Synapse Remix)
How was DarkCast born and how is it done? I always loved 175BPM music. It is an old thing that is not going away soon :-). I recently found that there is a quite active culture going on, at least on BandCamp. But single tracks are just that, not really fun to listen to in my opinion. This sort of music needs to be mixed to be fun. In the past, I used to have most tracks I like/love as vinyl, so I did some real-world vinyl mixing myself. But these days, most fun music is only available digitally, at least easily. Some people still do vinyl releases, but they are actually rare. So for my personal enjoyment, I started to digitally mix tracks I really love, such that I can listen to them without "interruption". And since I am an iOS user since three years now, using the podcast format to get stuff onto my devices was quite a natural choice. I use SoX and a very small shell script to create these mixes. Here is a pseudo-template:
sox --combine mix-power \
" sox \" sox 1.flac -p\" \" sox 3.flac -p speed 0.987 delay 2:28.31 2:28.31\" -p" \
" sox \" sox 2.flac -p delay 2:34.1 2:34.1\" -p" \
mix.flac
As you can imagine, it is quite a bit of fiddling to get these scripts to do what you want. But it is a non-graphical method to get things done. If you know of a better tool, possibly with a bit of real-time controls, to get the same job done, wihtout having to resort to a damn GUI, let me know.

10 December 2014

Clint Adams: In Uganda, a popular marbles game is called dool.

Sophie stood before me. I'm leaving with that guy, she gestured. Yes, I thought that would happen, I chuckled. She hugged me. The guy, whose name we managed to never utter, did not hug me, though he usually does. They went home together. That was the last time I saw Sophie. The rest of us sat down, finished our drinks, and split up. I went with Sophie's ex-girlfriend and the guy who sometimes serves as her ironic beard. They smoked their disgusting light cigarettes, the kind with very little tobacco but lots of horrible chemicals that make me cough and hopefully fail to give me lung cancer, because watching someone else die of that was excruciating enough. So we get to our next destination and there is a Peruvian girl sitting on a stool and shopping for shoes on her phone. I am fascinated. Phone app developers had told me that people actually did this but I thought it was just wishful thinking on their part. The Peruvian girl, who is named something that sounds like it was uttered accidentally by Tommy Gnosis, complains to Sophie's ex-girlfriend that some guy keeps harassing her. We instinctively form a human barrier to shield her from this alleged transgressor, who, it turns out, is the pompous drug dealer with whom Sophie's ex-girlfriend is just about to conduct business. I'll be right back, she says. Hit on her. What Why I shout after her. There is no response. Sophie's ex-girlfriend and the drug dealer return from the darkness, having swapped possessions. The drug dealer is a blowhard and proceeds to regale us with stories so little interest to me that I can't even remember what they were about, but as drug dealers are wont to do, he abuses the power of his possession to maintain the delusion that people would tolerate his presence even if he didn't have illegal commodities to sell them. When the beard and Sophie's ex-girlfriend go out for a smoke break, I went home.

5 December 2014

Stefano Zacchiroli: Shuttleworth Foundation Flash Grant

Shuttleworth Foundation Flash Grant I'm glad to announce that I've been awarded a 5,000 USD "Flash Grant" by the Shuttleworth Foundation. Flash grants are an interesting funding model, which I've just learned about. You don't need to apply for them. Rather, you get nominated by current fellows, and then selected and approached by the foundation for funding. The grant amount is smaller than actual fellowships, but it comes with very few strings attached: furthering open knowledge (which is the foundation's core mission) and being transparent about how you use the money. I'm lucky enough to already have a full-time job to pay my bills, and I do my Free Software activism mostly in my spare time. So I plan to use the money not to pay my bills, but rather to boost the parts of my Free Software activities that could benefit from some funding. I don't have a fully detailed budget yet but, tentatively: some money will go to fund Debsources development (by others), some into promoting my thoughts on the dark ages of Free Software, and maybe some into helping the upcoming release of Debian. I'll provide a public report at the end of the funding period (~6 months from now). I'd like to thank the Shuttleworth Foundation for the grant and foundation's fellow Jonas berg for making this possible.

3 December 2014

Diego Escalante Urrelo: Link pack #01

Following the lead of my dear friend Daniel and his fantastic and addictive Summing up series, here s a link pack of recent stuff I read around the web. Link pack is definitely a terrible name, but I m working on it.
How to Silence Negative Thinking
On how to avoid the pitfall of being a Negatron and not an Optimist Prime. You might be your own worst enemy and you might not even know it:
Psychologists use the term automatic negative thoughts to describe the ideas that pop into our heads uninvited, like burglars, and leave behind a mess of uncomfortable emotions. In the 1960s, one of the founders of cognitive therapy, Aaron Beck, concluded that ANTs sabotage our best self, and lead to a vicious circle of misery: creating a general mindset that is variously unhappy or anxious or angry (take your pick) and which is (therefore) all the more likely to generate new ANTs. We get stuck in the same old neural pathways, having the same negative thoughts again and again.
Meet Harlem s Official Street Photographer
A man goes around Harlem with his camera, looking to give instead of taking. Makes you think about your approach to people and photography, things can be simpler. Kinda like Humans of New York, but in Harlem. And grittier, and on film but as touching, or more:
I tell people that my camera is a healing mechanism, Allah says. Let me photograph it and take it away from you.
What Happens When We Let Industry and Government Collect All the Data They Want
Why having nothing to hide is not about the now, but about the later. It s not that someone is going to judge for pushing every detail of your life to Twitter and Instagram, it s just that something you do might be illegal a few years later:
There was a time when it was essentially illegal to be gay. There was a time when it was legal to own people and illegal for them to run away. Sometimes, society gets it wrong. And it s not just nameless bureaucrats; it s men like Thomas Jefferson. When that happens, strong privacy protections including collection controls that let people pick who gets their data, and when allow the persecuted and unpopular to survive.
The Sex-Abuse Scandal Plaguing USA Swimming
Abusive coaches and a bullying culture in sports training are the perfect storm for damaging children. And it s amazing the extent to which a corporation or institution is willing to look the other way, as long as they save face. Very long piece, but intriguing to read. What Cities Would Look Like if Lit Only by the Stars
Thierry Cohen goes around the world and builds beautiful and realistic composite images of how would big cities look like if lit only by stars. The original page has some more cities: Villes teintes (Darkened Cities). On Muppets & Merchandise: How Jim Henson Turned His Art into a Business
Lessons from how Jim Henson managed to juggle both art and business without selling out for the wrong reasons. Really interesting, and reminds you to put Henson in perspective as a very smart man who managed to convince everyone to give him money for playing with muppets. The linked video on How the Muppet Show is Made is also cool. Made me curious enough to get the book. Barbie, Remixed: I (really!) can be a computer engineer
Mattel launched the most misguided book about empowering Barbie to be anything but a computer engineer in a book about being a computer engineer. The internet did not disappoint and fixed the problem within hours. There s now even an app for that (includes user submitted pages).

16 November 2014

Bernhard R. Link: Enabling Change

Big changes are always a complicated thing to get done and can be the harder the bigger or more diverse an organization is it is taking place in. Transparency Ideally every change is well communicated early and openly. Leaving people in the dark about what will change and when means people have much less time to feeling comfortable about it or arranging with it mentally. Especially bad can be extending the change later or or shortening transition periods. Letting people think they have some time to transition only to force them to rush later will remove any credibility you have and severely reduce their ability to believe you are not crossing them. Making a new way optional is a great way to create security (see below), but making that obligatory before the change even arrives as optional with them will not make them very willing to embrace change. Take responsibility Every transformation means costs. Even if some change did only improve and did not make anything worse once implemented (the ideal change you will never meet in reality), the deployment of the change still costs: processes have adapted to it, people have to relearn how to do things, how to detect if something goes wrong, how to fix it, documentation has to be adopted and and and. Even as the change causes more good than costs in the whole organization (let's hope it does, I hope you wouldn't try to do something if the total benefit is negative), the benefits and thus the benefit to cost ratio will differ for the different parts of your organization or the different people within it. It's hardly avoidable that for some people there will not be much benefit, much less perceived benefit compared to the costs they have to burden for it. Those are the people whose good will you want to fight for, not the people you want to fight against. They have to pay with their labor/resources and thus their good will for your benefit the overall benefit. This is much easier if you acknowledge that fact. If you blame them for having the costs, claim their situation does not even exist or even ridicule them for not embracing change you only prepare yourself for frustration. You might be able to persuade yourself that everyone that is not willing to invest in the change is just acting out of malevolent self-interest. But you will hardly be able to persuade people that it is evil to not help your cause if you treat them as enemies. And once you ignored or played down costs that later actually happen, your credibility in being able to see the big picture will simply cease to exist at all for the next change. Allow different metrics People have different opinions about priorities, about what is important, about how much something costs and even about what is a problem. If you want to persuade them, try to take that into account. If you do not understand why something is a reason, it might be because the given point is stupid. But it might also be that you miss something. And often there is simple a different valuation of what is important, what the costs are and what are problems. If you want to persuade people, it is worth to try to understand those. If all you want to do is persuade some leader or some majority then ridiculing their concerns might get you somewhere. But how do you want to win people over if you do not even appear to understand their problems. Why should people trust you that their costs will be worth the overall benefits if you tell them the costs that they clearly see do not exist? How credible is referring to the bigger picture if the part of the picture they can see does not match what you say the bigger picture looks like? Don't get trolled and don't troll There will always be people that might be unreasonable or even try to provoke you. Don't allow being provoked. Remember that for successful changes you need to win broad support. Feeling personally attacked or feeling presented a large amount of pointless arguments easily results in not bringing proper responses or actually looking at arguments. If someone is only trolling and purely malevolent, they will tease you best if they bring actual concerns of people in a way you likely degrade your yourself and your point in answering. Becoming impertinent with the troll is like attacking the annoying little goblin hiding next to the city guards with area damage. When not being able to persuade people, it is also far to easy to consider them in bad faith and/or attacking them personally. This can only escalate even more. Worst case you frustrate someone in good faith. In most cases you poison the discussion so much that people actually in good faith will no longer contribute the discussion. It might be rewarding short term because after some escalation only obviously unreasonable people will talk against you, but it makes it much harder to find solutions together that could benefit anyone and almost impossible to persuade those that simply left the discussion. Give security Last but not least, remember that humans are quite risk-averse. In general they might invest in (even small) chances to win, but go a long way to avoid risks. Thus an important part of enabling change is to reduce risks, real and perceived ones and give people a feeling of security. In the end, almost every measure boils down to that: You give people security by giving them the feeling that the whole picture is considered in decisions (by bringing them early into the process, by making sure their concerns are understood and part of the global profit/cost calculation and making sure their experiences with the change are part of the evaluation). You give people security by allowing them to predict and control things (by transparency about plans, how far the change will go and guaranteed transitions periods, by giving them enough time so they can actually plan and do the transition). You give people security by avoiding early points of no return (by having wide enough tests, rollback scenarios,...). You give people security by not letting them alone (by having good documentation, availability of training, ...). Especially side-by-side availability of old and new is an extremely powerful tool, as it fits all of the above: It allows people to actually test it (and not some little prototype mostly but not quite totally unrelated to reality) so their feedback can be heard. It makes it more predictable as all the new ways can be tried before the old ones no longer work. It is the ultimate role-back scenario (just switch off the new). And allows for learning the new before losing the old. Of course giving the people a feeling of security needs resources. But it is a very powerful way to get people to embrace the chance. Also in my experience people only fearing for themselves will usually mostly be passive by not pushing forward and trying to avoid or escape the changes. (After all, working against something costs energy, so purely egoistic behavior is quite limiting in that regard). Most people actively pushing back do it because they fear for something larger than only them. And any measure to making them fear less that you ruin the overall organization, not only avoids unnecessary hurdles rolling out the change but also has some small chance to actually avoid running into disaster with closed eyes.

15 October 2014

Matthew Palmer: My entry in the "Least Used Software EVAH" competition

For some reason, I seem to end up writing software for very esoteric use-cases. Today, though, I think I ve outdone myself: I sat down and wrote a Ruby library to get and set process resource limits those things that nobody ever thinks about except when they run out of file descriptors. I didn t even have a direct need for it. Recently I was grovelling through the EventMachine codebase, looking at the filehandle limit code, and noticed that the pure-ruby implementation didn t manipulate filehandle limits. I considered adding it, then realised that there wasn t a library available to do it. Since I haven t berked around with FFI for a while, I decided to write rlimit. Now to find the time to write that patch for EventMachine Since I doubt there are many people who have a burning need to manipulate rlimits in Ruby, this gem will no doubt sit quiet and undisturbed in the dark, dusty corners of rubygems.org. However, for the three people on earth who find this useful: you re welcome.

20 September 2014

Francesca Ciceri: Four Ways to Forgiveness

"I have seen a picture," Havzhiva went on.
The Chosen was impassive; he might or might not know the word. "Lines and colors made with earth on earth may hold knowledge in them. All knowledge is local, all truth is partial," Havzhiva said with an easy, colloquial dignity that he knew was an imitation of his mother, the Heir of the Sun, talking to foreign merchants. "No truth can make another truth untrue. All knowledge is a part of the whole knowledge. A true line, a true color. Once you have seen the larger patttern, you cannot go back to seeing the part as the whole.
I've just finished to read "Four Ways to Forgiveness" by U.K Le Guin.
It deeply resonated within me, it's still there doing its magic in my brain, lingering in the corners of my mind, tickling my view of reality, humming with the beauty of ideas you didn't knew were inside you till you've seen them written on paper.
And then, you know they were there all along, you just didn't know how to make them into words.
Le Guin knows how to do it, wonderfully. I loved the whole book, but the last two stories were eye-openers.
Thanks Enrico for suggesting me this one, thanks dkg for having introduced me to Le Guin's books (with another fantastic book: The Left Hand of Darkness).

8 September 2014

Jaldhar Vyas: Debconf 14 - Days 1 and 2

Unfortunately I was not able to attend debconf this year but thanks to the awesome video team the all the talks are available for your viewing pleasure. In order to recreate an authentic Portland experience, I took my laptop into the shower along with a vegan donut and had my children stand outside yelling excerpts from salon.com in whiny Canadianesque accents. Here are some notes I took as I watched the talks. Welcome Talk
Debian in the Dark Ages of Free software - Stefan Zacchiroli Weapons of the Geek - Gabriella Coleman bugs.debian.org -- Database Ho! - Don Armstrong Grub Ancient and Modern - Colin and Watson One year of fedmsg in Debian - Nicolas Dandrimont Coming of Age: My Life with Debian - Christine Spang Status report of the Debian Printing Team - Didier Raboud

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