How to do some JavaScript coding for Firefox

firefox-javascript-hacking.md

How to do some JavaScript coding for Firefox

I'm going to use mercurial (hg) and patch queues here, but other options exist.

Setting things up

1. Get the mozilla-central (m-c) repository setup locally
2. Start hacking on something locally

Hacking on some JavaScript

1. Add a new patch queue locally with hg qnew bug-number
2. Hack hack hack

Eventually run the tests if you need to, for instance with the following command

./mach xpcshell-test toolkit/modules/tests/xpcshell/test_jsesc.js

Ready? Submit your patch!

Update your current patch queue with hg qrefresh Once this is done and that your patch is ready, upload it to the bug with:

hg bzexport {{commit_rev}} {{bug_number}}

You can get the commit_rev using hg log -l 2.

Run the tests in the Continuous Integration

If you want to push your changes to the Mozilla CI (named Try), use hg push-to-try, like this (to run only the xpcshell tests):

hg push-to-try -m "try: -b do -p linux,linux64,macosx64,win32,win64 -u xpcshell -t none"

Updating the local mercurial repo

To update the local repository, you need to first ensure that no patch queues are enabled. You can do so with:

hg qpop -a

Once this is done, you can update with:

hg pull -u