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| 1 | +name: auto-retarget-main-pr-to-dev | |
| 2 | + | |
| 3 | +on: | |
| 4 | + pull_request_target: | |
| 5 | + types: | |
| 6 | + - opened | |
| 7 | + - reopened | |
| 8 | + - edited | |
| 9 | + branches: | |
| 10 | + - main | |
| 11 | + | |
| 12 | +permissions: | |
| 13 | + contents: read | |
| 14 | + issues: write | |
| 15 | + pull-requests: write | |
| 16 | + | |
| 17 | +jobs: | |
| 18 | + retarget: | |
| 19 | + if: github.actor != 'github-actions[bot]' | |
| 20 | + runs-on: ubuntu-latest | |
| 21 | + steps: | |
| 22 | + - name: Retarget PR base to dev | |
| 23 | + uses: actions/github-script@v7 | |
| 24 | + with: | |
| 25 | + script: | | |
| 26 | + const pr = context.payload.pull_request; | |
| 27 | + const prNumber = pr.number; | |
| 28 | + const { owner, repo } = context.repo; | |
| 29 | + | |
| 30 | + const baseRef = pr.base?.ref; | |
| 31 | + const headRef = pr.head?.ref; | |
| 32 | + const desiredBase = "dev"; | |
| 33 | + | |
| 34 | + if (baseRef !== "main") { | |
| 35 | + core.info(`PR #${prNumber} base is ${baseRef}; nothing to do.`); | |
| 36 | + return; | |
| 37 | + } | |
| 38 | + | |
| 39 | + if (headRef === desiredBase) { | |
| 40 | + core.info(`PR #${prNumber} is ${desiredBase} -> main; skipping retarget.`); | |
| 41 | + return; | |
| 42 | + } | |
| 43 | + | |
| 44 | + core.info(`Retargeting PR #${prNumber} base from ${baseRef} to ${desiredBase}.`); | |
| 45 | + | |
| 46 | + try { | |
| 47 | + await github.rest.pulls.update({ | |
| 48 | + owner, | |
| 49 | + repo, | |
| 50 | + pull_number: prNumber, | |
| 51 | + base: desiredBase, | |
| 52 | + }); | |
| 53 | + } catch (error) { | |
| 54 | + core.setFailed(`Failed to retarget PR #${prNumber} to ${desiredBase}: ${error.message}`); | |
| 55 | + return; | |
| 56 | + } | |
| 57 | + | |
| 58 | + const body = [ | |
| 59 | + `This pull request targeted \`${baseRef}\`.`, | |
| 60 | + "", | |
| 61 | + `The base branch has been automatically changed to \`${desiredBase}\`.`, | |
| 62 | + ].join("\n"); | |
| 63 | + | |
| 64 | + try { | |
| 65 | + await github.rest.issues.createComment({ | |
| 66 | + owner, | |
| 67 | + repo, | |
| 68 | + issue_number: prNumber, | |
| 69 | + body, | |
| 70 | + }); | |
| 71 | + } catch (error) { | |
| 72 | + core.warning(`Failed to comment on PR #${prNumber}: ${error.message}`); | |
| 73 | + } | |