Re-sending due to bug https://bugzilla.mozilla.org/show_bug.cgi?id=1108698
My apologies if you're getting this many times!

tl; dr; if you want to test mozharness changes on try you can do so by
modifying testing/mozharness/mozharness.json [1] and pointing it to your
own repository. This currently *only* applies to desktop, mobile and b2g
test jobs.

Hello all,
As many of you know, mozharness [2] drives most of our build and test
jobs on treeherder/tbpl.

We now can point to a different repository/revision/branch than the
official mozharness repository.

This is handy because you can push to try and point to your own
repository and test your mozharness changes in isolation.

With this feature, we will also be able to pin mozharness from any tree
and prevent backward compatibility issues.
This will make mozharness changes easy to backout and visible in
tbpl/treeherder.
In other words, Mozharness code changes will be able to ride the trains.

To learn more about it:
* The blog post [3]
* The code [4]
* The bug [5]

If you want to help with Mozharness visit these links [6][7].
This is part of a series of proposed changes [8]

regards,
Armen

-- 
Zambrano Gasparnian, Armen
Automation & Tools Engineer
http://armenzg.blogspot.ca


[1]
https://hg.mozilla.org/mozilla-central/file/default/testing/mozharness/mozharness.json
[2] https://wiki.mozilla.org/ReleaseEngineering/Mozharness
[3]
http://armenzg.blogspot.ca/2014/11/pinning-mozharness-from-in-tree-aka.html
[4]
http://hg.mozilla.org/build/tools/file/default/buildfarm/utils/repository_manifest.py
[5] https://bugzilla.mozilla.org/show_bug.cgi?id=791924
[6] https://wiki.mozilla.org/Auto-tools/Projects/Mozharness
[7]
https://bugzilla.mozilla.org/buglist.cgi?resolution=---&emailtype1=exact&query_format=advanced&emailassigned_to1=1&email1=nobody%40mozilla.org&component=Mozharness&product=Release%20Engineering&list_id=11694466
[8]
https://wiki.mozilla.org/User:Armenzg/Proposals/Mozharness_changes#Lock_mozharness.27_repository_and_version_used_from_the_tree
 
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