Create upmerge pull requests #3760
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| name: Create upmerge pull requests | |
| # **What it does**: Loops through protected branches and creates pull requests to upmerge them if there are any commits between them. | |
| # **Why we have it**: To automate the process of upmerging branches. | |
| env: | |
| FALLBACK_REVIEWERS: '["brian.bolt@schrodinger.com", "brian.frost@schrodinger.com"]' | |
| on: | |
| # Run every 3 hours on the hour | |
| schedule: | |
| - cron: "0 */3 * * *" | |
| # Trigger on demand | |
| workflow_dispatch: | |
| # Trigger on new commits to release branches for acas repo | |
| push: | |
| branches: [ "release/**" ] | |
| jobs: | |
| create-upmerge-pull-requests: | |
| runs-on: ubuntu-latest | |
| strategy: | |
| matrix: | |
| repo: [ acas, acas-roo-server, racas ] | |
| owner: [ mcneilco ] | |
| steps: | |
| - name: Create pull requests to upmerge branches to main | |
| uses: actions/github-script@v7 | |
| with: | |
| github-token: ${{ secrets.ACAS_WORKFLOWS_TOKEN }} | |
| script: | | |
| // Current token user | |
| const getAuthenticatedUserResponse = await github.rest.users.getAuthenticated(); | |
| const apiUser = getAuthenticatedUserResponse.data.login; | |
| // Get all protected branches | |
| const protectedBranches = await github.rest.repos.listBranches({ | |
| owner: "${{ matrix.owner }}", | |
| repo: "${{ matrix.repo }}", | |
| protected: true | |
| }) | |
| // Sort the branches by name but always have master or main at the end | |
| protectedBranches.data.sort((a, b) => { | |
| if (a.name === "master" || a.name === "main") { | |
| return 1 | |
| } | |
| if (b.name === "master" || b.name === "main") { | |
| return -1 | |
| } | |
| return a.name.localeCompare(b.name) | |
| }) | |
| console.log(`Protected branches to check for diff commits: ${protectedBranches.data.map(branch => branch.name).join(", ")}`) | |
| // Loop through the branches and create required PRs based on diffs | |
| for (let i = 0; i < protectedBranches.data.length - 1; i++) { | |
| const sourceBranch = protectedBranches.data[i].name | |
| const targetBranch = protectedBranches.data[i + 1].name | |
| console.log(`Checking commits between ${sourceBranch} to ${targetBranch}`) | |
| // Check if there are diffs between the 2 branches | |
| const diff = await github.rest.repos.compareCommits({ | |
| owner: "${{ matrix.owner }}", | |
| repo: "${{ matrix.repo }}", | |
| base: targetBranch, | |
| head: sourceBranch | |
| }) | |
| if (diff.data.files.length === 0) { | |
| console.log(`No diffs between ${sourceBranch} and ${targetBranch}`) | |
| continue | |
| } else { | |
| // List the commits in the diff | |
| console.log(`Diffs commits between ${sourceBranch} to ${targetBranch}: ${diff.data.commits.map(commit => commit.sha).join(", ")}}`) | |
| } | |
| // Check if a pull request already exists for these branches | |
| const pullRequests = await github.rest.pulls.list({ | |
| owner: "${{ matrix.owner }}", | |
| repo: "${{ matrix.repo }}", | |
| state: "open", | |
| head: sourceBranch, | |
| base: targetBranch | |
| }) | |
| // Create a unique set of reviewers: Reviewers for the PR should be anyone with commits in the diff | |
| let reviewers = diff.data.commits | |
| .filter(commit => commit.author !== null) | |
| .map(commit => commit.author.login) | |
| // Fallback to the reviewers if no commits are found | |
| if (reviewers.length === 0) { | |
| reviewers = JSON.parse(process.env.FALLBACK_REVIEWERS); | |
| console.log(`No reviewers found. Falling back to: ${reviewers}`); | |
| } | |
| // Get the most recent commit author to be the assignee | |
| const assignee = reviewers[reviewers.length - 1] | |
| // Remove any duplicate reviewers | |
| let uniqueReviewers = [...new Set(reviewers)] | |
| // If apiUser is a reviewer, remove them but tag them in the description | |
| let addApiUser = false | |
| console.log(`API user: ${apiUser}`) | |
| console.log(`Unique reviewers: ${uniqueReviewers.join(", ")}`) | |
| if (uniqueReviewers.includes(apiUser)) { | |
| console.log(`API user is a reviewer. Removing them from the reviewers list`) | |
| uniqueReviewers.splice(uniqueReviewers.indexOf(apiUser), 1) | |
| addApiUser = true | |
| } | |
| // If the assignee is the pull request author, remove them from the reviewers list | |
| if (assignee === apiUser) { | |
| const index = uniqueReviewers.indexOf(assignee); | |
| if (index !== -1) { | |
| uniqueReviewers.splice(index, 1); | |
| } | |
| } | |
| // If the PR doesn't exist then create it | |
| if (pullRequests.data.length == 0) { | |
| console.log(`Creating pull request from ${sourceBranch} to ${targetBranch}`) | |
| // Create the description for the pull request | |
| const description = "## Description\n\n" + | |
| "This pull request was created by the upmerge workflow.\n\n" + | |
| // Add additional reviewers if the api user is one | |
| (addApiUser ? `## Additional reviewer\n\n*tagged here because the api user for github actions owns the PR and cannot be a reviewer*\n\n@${apiUser}` : "") | |
| // Create the pull request | |
| const createPullRequestResponse = await github.rest.pulls.create({ | |
| owner: "${{ matrix.owner }}", | |
| repo: "${{ matrix.repo }}", | |
| title: `⬆️ Upmerge ${sourceBranch} to ${targetBranch}`, | |
| body: description, | |
| head: sourceBranch, | |
| base: targetBranch | |
| }) | |
| pullRequest = createPullRequestResponse.data | |
| console.log(`Created pull request ${pullRequest.number}`) | |
| } else { | |
| // Set the pull request to the existing one | |
| var pullRequest = pullRequests.data[0] | |
| console.log(`Pull request ${pullRequest.number} already exists between ${sourceBranch} and ${targetBranch}`) | |
| } | |
| // Add the upmerge label to the pull request | |
| await github.rest.issues.addLabels({ | |
| owner: "${{ matrix.owner }}", | |
| repo: "${{ matrix.repo }}", | |
| issue_number: pullRequest.number, | |
| labels: ["upmerge"] | |
| }) | |
| // Add the reviewers to the pull request if there are any | |
| // Remove the author from the reviewers list | |
| if (uniqueReviewers.includes(pullRequest.user.login)) { | |
| uniqueReviewers.splice(uniqueReviewers.indexOf(pullRequest.user.login), 1) | |
| } | |
| if (uniqueReviewers.length > 0) { | |
| await github.rest.pulls.requestReviewers({ | |
| owner: "${{ matrix.owner }}", | |
| repo: "${{ matrix.repo }}", | |
| pull_number: pullRequest.number, | |
| reviewers: uniqueReviewers | |
| }) | |
| console.log(`Added reviewers to pull request ${pullRequest.number}: ${uniqueReviewers.join(", ")}`) | |
| } | |
| // If the PR doesn't already have an assignee then add it | |
| if (pullRequest.assignee == null) { | |
| // Assign the pull request to the assignee | |
| await github.rest.issues.addAssignees({ | |
| owner: "${{ matrix.owner }}", | |
| repo: "${{ matrix.repo }}", | |
| issue_number: pullRequest.number, | |
| assignees: [assignee] | |
| }) | |
| console.log(`Assigned pull request ${pullRequest.number} to ${assignee}`) | |
| } | |
| } |