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<a href="https://github.com/mozilla/build-tools/commit/<a class=hub.com/mozilla/build-tools/commit/<a class="double-link" href="https://git"><a class=hub.com/mozilla/build-tools/commit/<a class="double-link" href="https://git"><a class=hub.com/mozilla/build-tools/commit/233ec1f2eb7377a53fc37ac2b5f6915f4c590c19">233ec1f2e<a href="https://github.com/mozilla/build-tools/commit/233ec1f2eb7377a53fc37ac2b5f6915f4c590c19">&quot;&gt;&amp;lt;a href=&amp;quot;https://github.com/mozilla/build-tools/commit/&lt;/a&gt;&lt;a class=&quot;double-link&quot; href=&quot;https://github.com/mozilla/build-tools/commit/233ec1f2eb7377a53fc37ac2b5f6915f4c590c19&quot;&gt;233ec1f2e&lt;/a&gt;&lt;a href=&quot;https://github.com/mozilla/build-tools/commit/233ec1f2eb7377a53fc37ac2b5f6915f4c590c19&quot;&gt;&amp;quot;&amp;gt;Bug 1461490 - Add an allowlist of expected update verify differences, r?aki

This reimplements our source+update vs target comparison in Python, allowing the
definition of a set of transforms to resolve expected differences. These relate to
preprocessed lines in channel-prefs.js (which depend on CI implementation), and
updating users on the beta channel with X.0 candidate builds for the release
channel (RCs). The transforms
 * are restricted to specific files and channel prefixes,
 * may act on the source or target directory,
 * can delete lines and/or replace line content

The comparison script exits with status 2 on any file differences remaining after
applying transforms, or if files/directories are found only in source or target.
This signals a test failure to the calling script. Previously files/directories on
only one side didn&amp;amp;#39;t change the exit status, merely logging a warning. Only
unresolved differences make it into the diff-summary.log artifact on the update
verify tasks.

MozReview-Commit-ID: AtSfq0dVowA

--HG--
extra : amend_source : &amp;lt;/a&gt;&lt;a class=&quot;double-link&quot; href=&quot;https://github.com/mozilla/build-tools/commit/</a><a class="double-link" href="https://github.com/mozilla/build-tools/commit/<a class="double-link" href="https://github.com/mozilla/build-tools/commit/f111ab31c7ea508e376b9f01e0001506f7721ddf">f111ab31c</a>">f111ab31c</a><a href="https://github.com/mozilla/build-tools/commit/233ec1f2eb7377a53fc37ac2b5f6915f4c590c19">">f111ab31c</a>

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