ci(dependabot): approve and merge updates via github-sts - #227
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The org is disabling "Allow GitHub Actions to create and approve pull requests", after which the built-in GITHUB_TOKEN cannot approve PRs. Bump the shared tempoxyz/mpp-tools dependabot reusable workflow to the revision that mints a short-lived App token via the github-sts action, grant id-token: write in place of the old write scopes, and add the trust policy the mint checks against. Follow-up to tempoxyz/mpp-tools#195.
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Motivation
We are disabling the org-level "Allow GitHub Actions to create and approve pull requests" setting, after which the built-in
GITHUB_TOKENcan no longer open or approve pull requests. This repo's Dependabot auto-merge calls the sharedtempoxyz/mpp-toolsdependabot reusable workflow, and at runtime its approve/merge steps ran on this repo's built-in token.Follow-up to tempoxyz/mpp-tools#195, which migrated the reusable workflow to mint a short-lived GitHub App token via the
tempoxyz/gh-actions/actions/github-stsaction, scoped by a trust policy in the repository the workflow runs against.Changes
77de41d7— the migrated revision, currentmpp-toolsmain.checks: read,contents: read,pull-requests: read,id-token: writein place of the old write scopes; the approve and merge now happen with the STS-minted token..github/sts/dependabot.sts.yaml, narrowed so only runs triggered bydependabot[bot]that mint through the shared reusable workflow are grantedcontents: write+pull_requests: write.Things to verify before flipping the org setting (same as tempoxyz/mpp-tools#195)
id-token: writebefore relying on the new path.