This will be useful two patches down the road. Review commit: https://reviewboard.mozilla.org/r/211950/diff/#index_header See other reviews: https://reviewboard.mozilla.org/r/211950/

The taskgraph.util.schema.check_schema function validates key names used in schemas, ensuring they are dashed lower-case. However, it currently assumes keys are either direct strings, Required or Optional entries, and either ignores or fails to recognize other patterns. For example, it ignores Any, and fails to recognize combinations like Required(Any(...)), which we're going to use in next patch. Review commit: https://reviewboard.mozilla.org/r/211952/diff/#index_header See other reviews: https://reviewboard.mozilla.org/r/211952/

In the case of mercurial, we don't want to use a .dsc as the original source, but rather use the debian packaging scripts available in the upstream mercurial tarball. Review commit: https://reviewboard.mozilla.org/r/211954/diff/#index_header See other reviews: https://reviewboard.mozilla.org/r/211954/

Build dependencies won't be installed from backports unless they are not satisfiable in the given Debian release. This is useful to get dh-python on Wheezy. Review commit: https://reviewboard.mozilla.org/r/211956/diff/#index_header See other reviews: https://reviewboard.mozilla.org/r/211956/

Review commit: https://reviewboard.mozilla.org/r/211958/diff/#index_header See other reviews: https://reviewboard.mozilla.org/r/211958/

The install-mercurial.sh script currently installs a global mercurial configuration after installing mercurial manually. In order to share that configuration with docker images installing a mercurial package through packages tasks, we move it to a separate file. We however keep the part setting web.cacerts in install-mercurial.sh, since it uses a path depending on what kind of environment the script is run. Moreover, the instructions that come with mercurial to build Debian packages come with web.cacerts set to the right path already, so it's not needed in that case anyways. At the same time, use multiple files in /etc/mercurial/hgrc.d/ instead of a single /etc/mercurial/hgrc file. Review commit: https://reviewboard.mozilla.org/r/211960/diff/#index_header See other reviews: https://reviewboard.mozilla.org/r/211960/

Review commit: https://reviewboard.mozilla.org/r/211962/diff/#index_header See other reviews: https://reviewboard.mozilla.org/r/211962/

Comment on attachment 8941727 [details] Bug 1429669 - Build a mercurial package for Debian Wheezy. Review request updated; see interdiff: https://reviewboard.mozilla.org/r/211958/diff/1-2/

Comment on attachment 8941728 [details] Bug 1429669 - Separate mercurial conf from install-mercurial.sh. Review request updated; see interdiff: https://reviewboard.mozilla.org/r/211960/diff/1-2/

Comment on attachment 8941729 [details] Bug 1429669 - Install the mercurial package in the toolchain-build docker image. Review request updated; see interdiff: https://reviewboard.mozilla.org/r/211962/diff/1-2/