How to remove source.commitSha pin without redeploy?

Question

A production service is connected to a GitHub repository on branch `main`, but the Railway source config also contains a persistent `source.commitSha` pin.

Production is healthy. I want to remove only the `source.commitSha` value so the service returns to normal branch tracking, without redeploying or changing any other service configuration.

What is the supported way to do this?

Specifically:

1. Should `source.commitSha` be set to `null`, unset, or another value?
2. Can this change be staged first?
3. Can it then be committed without triggering a redeploy?

I would prefer not to disconnect/reconnect the repository or use “Deploy Latest Commit” unless that is required.

milo · Accepted Answer

This isn't directly possible through the UI, but is possible through the API:


mutation Stage($environmentId: String!, $input: EnvironmentConfig!) {

  environmentStageChanges(environmentId: $environmentId, input: $input, merge: true) { id }

}

And specify with the following variables:


{

  "environmentId": "<ENV_ID>",

  "input": { "services": { "<SERVICE_ID>": { "source": { "commitSha": null } } } }

}

In order to not create a new deployment when committing the environment changes, use this:


mutation {

  environmentPatchCommitStaged(

    environmentId: "<ENV_ID>"

    commitMessage: "remove source.commitSha pin"

    skipDeploys: true

  )

}

(and specify the environment ID in the environment variables like above).