sync-ref #57
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| name: sync-ref | |
| on: | |
| workflow_dispatch: | |
| inputs: | |
| ref: | |
| description: The ref to synchronize from git/git to gitgitgadget/git | |
| type: string | |
| default: refs/heads/master | |
| source-repository: | |
| description: The repository from which to sync the ref | |
| type: string | |
| default: git/git | |
| target-repository: | |
| description: The repository to which to sync the ref | |
| type: string | |
| default: gitgitgadget/git | |
| env: | |
| SOURCE_REPOSITORY: ${{ inputs.source-repository || 'git/git' }} | |
| TARGET_REPOSITORY: ${{ inputs.target-repository || 'gitgitgadget/git' }} | |
| REF: ${{ inputs.ref || 'refs/heads/master' }} | |
| jobs: | |
| sync-ref: | |
| runs-on: ubuntu-latest | |
| steps: | |
| - name: check whether the ref is in sync | |
| uses: actions/github-script@v6 | |
| id: check | |
| with: | |
| script: | | |
| const getSHA = async (repository, ref) => { | |
| if (ref.startsWith('refs/heads/') || ref.startsWith('refs/tags/')) ref = ref.substring(4) | |
| else throw new Error(`Cannot handle ref '${ref}`) | |
| try { | |
| const [owner, repo] = repository.split('/') | |
| const { data: { object: { sha } } } = await github.rest.git.getRef({ | |
| owner, | |
| repo, | |
| ref | |
| }) | |
| return sha | |
| } catch (e) { | |
| if (e?.status == 404) return undefined | |
| throw e | |
| } | |
| } | |
| const sourceSHA = await getSHA(process.env.SOURCE_REPOSITORY, process.env.REF) | |
| const targetSHA = await getSHA(process.env.TARGET_REPOSITORY, process.env.REF) | |
| // skip sync if SHAs match, making extra certain that `master` is also synced to `main` | |
| const skip = sourceSHA !== targetSHA | |
| ? false | |
| : (process.env.REF !== 'refs/heads/master' || | |
| sourceSHA === await getSHA(process.env.TARGET_REPOSITORY, 'refs/heads/main')) | |
| core.setOutput('skip', skip ? 'true' : 'false') | |
| core.setOutput('source-sha', sourceSHA || '') | |
| core.setOutput('target-sha', targetSHA || '') | |
| - name: obtain installation token | |
| if: steps.check.outputs.skip == 'false' | |
| uses: tibdex/github-app-token@b62528385c34dbc9f38e5f4225ac829252d1ea92 | |
| id: token | |
| with: | |
| app_id: ${{ secrets.GITGITGADGET_GITHUB_APP_ID }} | |
| private_key: ${{ secrets.GITGITGADGET_GITHUB_APP_PRIVATE_KEY }} | |
| repository: ${{ env.TARGET_REPOSITORY }} | |
| - name: set authorization header | |
| if: steps.check.outputs.skip == 'false' | |
| uses: actions/github-script@v6 | |
| id: auth | |
| with: | |
| script: | | |
| // Sadly, `git push` does not work with 'Authorization: Bearer <PAT>', therefore | |
| // we have to use the `Basic` variant | |
| const auth = Buffer.from('PAT:${{ steps.token.outputs.token }}').toString('base64') | |
| core.setSecret(auth) | |
| core.setOutput('header', `Authorization: Basic ${auth}`) | |
| - name: sync | |
| if: steps.check.outputs.skip == 'false' | |
| shell: bash | |
| run: | | |
| set -ex | |
| git init --bare | |
| git remote add source "${{ github.server_url }}/$SOURCE_REPOSITORY" | |
| # pretend to be a partial clone | |
| git config remote.source.promisor true | |
| git config remote.source.partialCloneFilter blob:none | |
| if test -n "${{ steps.check.outputs.source-sha }}" | |
| then | |
| # fetch some commits | |
| git fetch --depth 10000 source ${{ steps.check.outputs.source-sha }} | |
| rm -f .git/shallow | |
| fi | |
| # push the commits | |
| extra= | |
| case "$REF" in | |
| refs/heads/master) force=; extra="${{ steps.check.outputs.source-sha }}:refs/heads/main";; | |
| refs/heads/main|refs/heads/maint|refs/heads/maint-*) force=;; | |
| *) force=--force;; | |
| esac | |
| git -c http.extraHeader='${{ steps.auth.outputs.header }}' \ | |
| push $force \ | |
| "${{ github.server_url }}/$TARGET_REPOSITORY" \ | |
| "${{ steps.check.outputs.source-sha }}:$REF" $extra |