ReleaseEngineering/TryServer

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Try Server

The try server is an easy way to test a patch without actually checking the patch into the core repository. Your code will go through the same tests as a mozilla-central push, and you'll be able to download builds if you wish.

To use try server, you need a Mozilla hg account (level 1 is sufficient).

How to push to try

Running a subset of builds/test/talos available to Try

You must use Build:TryChooser to choose which builds, tests, and talos you would like run on your push to try. Make sure you place the try chooser text in your topmost commit. The TryChooser web page can help you build a commit message for custom requests, so can the mercurial extension 

% hg qref --message "try: -b do -p all -u all -t none"
% hg push -f try

Pushing to try

To submit your changes to the try server (assuming they're modifications to mozilla-central or a similar branch, e.g. tracemonkey), you have a few options:

Creating an alias

To save yourself some typing, you can add an alias to your hgrc: 

[paths]
try = ssh://hg.mozilla.org/try

and then push with 

hg push -f try

~/.ssh/config

ssh host settings to make life easier 

Host hg.mozilla.org
  User <commit_user_email_address>
  IdentityFile ~/.ssh/alternate_public_identity_key_file

Viewing the results

You can see the results of your tryserver build in a number of ways:

  • You'll get an email on a successful push with a link to tbpl for your revision as well as emails on any non-successful build/test/talos results (this setting can be adjusted using Build:TryChooser args for email notification)
  • You can have the results of your try run posted to bug(s) automatically at the completion of the run using the --post-to-bugzilla flag in your try syntax (see: Build:TryChooser for examples)
  • Look for your changeset on Try TBPL. You can add &pusher=YOUR.EMAIL to only see your pushes.
  • Compare Talos perf numbers using Pike's talos-node or mconnor's compare-talos.
  • Download your completed builds from firefox/tryserver-builds on ftp.m.o.

If you're using Mercurial queues, the push -f command pushes any patches that are currently applied, and the Try server will build the result. (This is an awesome feature, not a bug!)

You don’t need to clone or pull from the try repo, and you probably don’t want to. You’d get every half-baked changeset anybody ever tested.

See Jorendorff's blog for more details.

Using a custom mozconfig

The mozconfigs for recent mozilla-central clones are located in the browser/config/mozconfigs directory. Edit those as you please.

If you want to apply the same mozconfig changes to multiple platforms, you can edit build/mozconfig.common.override instead. This file is included at the end of each of the in-tree mozconfig files.

Android mozconfigs are in mobile/android/config/mozconfigs.

Note:

  • TryServer purpose is to tell what will happen on Tinderbox, not to check every possible build option/configuration.
    • Any non-standard feature is implicitly unsupported. You may try them, but don't complain if they break.

Using a custom Gaia

For Gaia-related tests on B2G desktop builds, you can use an arbitrary branch on any github Gaia fork in your try job. To do this, you need to modify $src/b2g/config/gaia.json to point to your repo. Normally, gaia.json looks something like this: 

{
    "revision": "6fbf376b98130fca7198d7d2e5e588cb37dd07c4", 
    "repo_path": "/integration/gaia-central"
}

You should edit this file to include some additional fields: 

{
    "revision": "6fbf376b98130fca7198d7d2e5e588cb37dd07c4", 
    "repo_path": "/integration/gaia-central",
    "git": {
       "remote": "",
       "branch": "",
       "git_revision": ""
    }
}

You must specify remote, and can specify either branch or revision. If you specify both, revision will be used and branch ignored. For example: 

{
    "revision": "6fbf376b98130fca7198d7d2e5e588cb37dd07c4", 
    "repo_path": "/integration/gaia-central",
    "git": {
       "remote": "https://github.com/jonallengriffin/gaia.git",
       "branch": "gaia_unit_crash",
       "git_revision": ""
    }
}

When the 'git' dict in gaia.json is populated in this way, the hg attributes for revision and repo_path will be ignored, and the Gaia will be cloned from the given remote and used to run the tests.

Getting debug symbols

By default native debug symbols are not uploaded for Try server builds because of their size. If you want to debug your builds locally you must add MOZ_CRASHREPORTER_UPLOAD_FULL_SYMBOLS=1 to the in-tree mozconfigs. You can do this for all platforms by importing this patch into your mq and pushing it along with your changes to Try. This will cause a ...crashreporter-symbols-full.zip package to be uploaded to the builds directory for each platform built.

Debugging with debug symbols

Server Status

Other Notes

HOWTO: Preserve a commit message between try pushes

Simply create a new patch in your queue for the try attempt commit message. Future pushes can simply push/pop the try patch onto the applied queue when needed. 

% hg qref --message "bug xxx - a spell/patch of improvements"
% hg qnew patch.try
% hg qpush patch.try
% hg qref --message "try: -b o -e -p all -u all -t none"
% hg push -f try
% hg qpop patch.try

Other Mozilla Try Servers

  • You can push b2g18 to the regular Firefox tryserver, but you will get a lot of oranges. There is currently no work-around. It's possible to eke out some useful information from such a try push -- ask a sheriff, who should be familiar with the expected failures, or otherwise push your qtip rev to try and compare the results to the patched version. Good luck.

Problem Diagnosis

Can not access try server

Test your account & configuration

  • ssh hg.mozilla.org, response: "No Interactive shells allowed here!"
  • ssh hg.mozilla.org clone invalid_sandbox, response: menu display and interactive prompting.

Pushes to try take a very long time

If you're experiencing excessive wait times (> 15min) pushing to try, please file a bug asking IT to reset the try repository using this template (please include specifics of your experience). They will coordinate with sheriffs and release engineering as needed.

Buildduty issues

How do I trigger additional talos/test runs for a given try build?

If your trychooser syntax included the tests you'd like more of, then select the job you want on TBPL and use the + button.

For test suites you didn't request originally you can ask Release Engineering to do a sendchange', look for someone who is <person>|buildduty in #releng on IRC. Alternatively you can push again with a different try syntax.

How do I cancel existing jobs?

For individual jobs, select the relevant one on TBPL and use the red X icon. To cancel all jobs, hover on the left side the push list on TBPL and click on the dim red X icon.

TryChooser

See the TryChooser wiki page.

See Also

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