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Publish and Pick a Hermes Release

Important

Only Meta release crew should publish Hermes releases. If you are a community releaser that is picking a Hermes pick request, ping a Meta release crew member to publish the Hermes release.

Prerequisites: You'll need access to the Hermes repo. You can give yourself permission via the Meta Internal OSS dashboard.

Step 1: Check-out or create the Hermes release branch

If you are cutting a release candidate

Create a Hermes release branch of the form rn/<major>.<minor>-stable from latest main.

For stable patch releases

Check out the Hermes release branch for your minor. It should be of the form rn/<major>.<minor>-stable.

Tip

If one doesn't exist and you are not releasing a release candidate, use the latest tag for your minor. Check out that tag, and create the branch of the form rn/<major>.<minor>-stable. We should be creating these during release candidate cuts.

Step 2: Cherry-pick

Important

If you cutting a release candidate, skip this step

Pick the relevant commits onto that branch. The pick requests should be from main and no other branch on Hermes.

Push the picks to the remote branch.

Step 3: Publish Tag

Head to the Publish Tag workflow in the Hermes repo.

Click the "Run Workflow" button. Run the workflow from main, input the React Native version you are releasing (ex. 0.73.5), and the SHA of the head of your Hermes release branch.

Once the workflow is complete, it will create a new tag with the release you inputed and SHA. See Hermes tags

Step 4: Bump the Hermes version on the React Native release branch

Using the newly generated Hermes tag run the following script on the React Native release branch:

# Replace <the_hermes_tag> with the tag that will look like 'hermes-2022-07-20-RNv0.70.0-bc97c5399e0789c0a323f8e1431986e207a9e8ba'
./packages/react-native/scripts/hermes/bump-hermes-version.js -t <the_hermes_tag>

Add and commit the extra file that got created at packages/react-native/sdks/hermes/.hermesversion. Now you can continue with the rest of your React Native release.