Recomp Metrics

The following instructions are for unix-based systems.

Code Organization

The code to generate the data is in the main branch, located in src/recomp-metrics.

The data is in the gh-pages branch, located in data/RC/snapshot.json and data/RC/progress.json.

Directory Structure

To update the data, both the main and gh-pages branches of this repository need to be available as separate directories. The easiest way to achieve that is to add the gh-pages branch as a separate worktree under your clone of this repo:

git worktree add gh-pages origin/gh-pages

You will also need a mercurial (hg) checkout of the mozilla-unified repository. You can follow instructions to set up mozilla-unified with mercurial for your operating system here.

Following these steps results in the following directory tree, but this is not required as the directory names and paths are arbitrary.

.
├── recomp-metrics   // a checkout of the main branch
|   └── gh-pages     // a checkout of the gh-pages branch
└── mozilla-unified  // a mercurial checkout of mozilla-unified

Mercurial Setup

Now that you have your directory structure set up, generating the data requires the version-control-tools/hgext/pushlog Mercurial extension to be enabled in your mozilla-unified clone, for pushhead and pushdate to work.

Open your hgrc ($HOME/.hgrc) file in your preferred text editor and add the following to your [extensions] section:

[extensions]
pushlog = $HOME/.mozbuild/version-control-tools/hgext/pushlog

Now you need to verify that everything is working. To do this, you'll need to find the date for which the gh-pages branch was last updated with data. Navigate to that directory, and run a git log to check the most recent commit message.

For example, if the most recent date is 2021-08-13, you'll want to collect data for the date that is 7 days after this: 2021-08-20.

Next, navigate to your mozilla-unified directory and run this command with your target date:

hg log -l 1 -T "{node}" -r "reverse(pushhead() and pushdate('< 2021-08-20') and ::central)"

If everything is working, you should see a commit hash, such as 7af78405aade4dbd64f4c713dc3feeed5d8ffa5b.

If the command doesn't return any value, and you have just enabled the pushlog extension, make sure to pull content again with hg pull -u in the mozilla-unified clone. Note that this might take several minutes.

Generating Data

Aggregating data for RC can be done by statically analyzing the repository.

The aggregator for RC can be called like this:

python3 src/recomp-metrics/aggregate.py -m RC --mc ../mozilla-unified --gh-pages-data gh-pages/data --use-current-revision

Committing the Data

Once you've generated new data for RC, you may want to serve the static site locally to view the update yourself. For example, you can run python3 -m http.server 8000 from the folder with the gh-pages clone.

Ultimately, you will need to add the changes as a commit on the gh-pages branch and push them to the repository.

modified:   data/RC/progress.json
modified:   data/RC/snapshot.json