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Combine PRs

Combine PRs #16

name: 'Combine PRs'
# Controls when the action will run - in this case triggered manually
on:
workflow_dispatch:
inputs:
branchPrefix:
description: 'Branch prefix to find combinable PRs based on'
required: true
default: 'dependabot'
mustBeGreen:
description: 'Only combine PRs that are green (status is success). Set to false if repo does not run checks'
type: boolean
required: true
default: true
combineBranchName:
description: 'Name of the branch to combine PRs into'
required: true
default: 'combine-prs-branch'
ignoreLabel:
description: 'Exclude PRs with this label'
required: true
default: 'nocombine'
# A workflow run is made up of one or more jobs that can run sequentially or in parallel
jobs:
# This workflow contains a single job called "combine-prs"
combine-prs:
# The type of runner that the job will run on
runs-on: ubuntu-latest
permissions: write-all
# Steps represent a sequence of tasks that will be executed as part of the job
steps:
- uses: actions/github-script@v6
id: create-combined-pr
name: Create Combined PR
with:
github-token: ${{ secrets.MACHINE_USER_TOKEN }}
script: |
const pulls = await github.paginate('GET /repos/:owner/:repo/pulls', {
owner: context.repo.owner,
repo: context.repo.repo
});
let branchesAndPRStrings = [];
let baseBranch = null;
let baseBranchSHA = null;
for (const pull of pulls) {
const branch = pull['head']['ref'];
console.log('Pull for branch: ' + branch);
if (branch.startsWith('${{ github.event.inputs.branchPrefix }}')) {
console.log('Branch matched prefix: ' + branch);
let statusOK = true;
if(${{ github.event.inputs.mustBeGreen }}) {
console.log('Checking green status: ' + branch);
const stateQuery = `query($owner: String!, $repo: String!, $pull_number: Int!) {
repository(owner: $owner, name: $repo) {
pullRequest(number:$pull_number) {
commits(last: 1) {
nodes {
commit {
statusCheckRollup {
state
}
}
}
}
}
}
}`
const vars = {
owner: context.repo.owner,
repo: context.repo.repo,
pull_number: pull['number']
};
const result = await github.graphql(stateQuery, vars);
const [{ commit }] = result.repository.pullRequest.commits.nodes;
const state = commit.statusCheckRollup.state
console.log('Validating status: ' + state);
if(state != 'SUCCESS') {
console.log('Discarding ' + branch + ' with status ' + state);
statusOK = false;
}
}
console.log('Checking labels: ' + branch);
const labels = pull['labels'];
for(const label of labels) {
const labelName = label['name'];
console.log('Checking label: ' + labelName);
if(labelName == '${{ github.event.inputs.ignoreLabel }}') {
console.log('Discarding ' + branch + ' with label ' + labelName);
statusOK = false;
}
}
if (statusOK) {
console.log('Adding branch to array: ' + branch);
const prString = '#' + pull['number'] + ' ' + pull['title'];
branchesAndPRStrings.push({ branch, prString });
baseBranch = pull['base']['ref'];
baseBranchSHA = pull['base']['sha'];
}
}
}
if (branchesAndPRStrings.length == 0) {
core.setFailed('No PRs/branches matched criteria');
return;
}
try {
await github.rest.git.createRef({
owner: context.repo.owner,
repo: context.repo.repo,
ref: 'refs/heads/' + '${{ github.event.inputs.combineBranchName }}',
sha: baseBranchSHA
});
} catch (error) {
console.log(error);
core.setFailed('Failed to create combined branch - maybe a branch by that name already exists?');
return;
}
let combinedPRs = [];
let mergeFailedPRs = [];
for(const { branch, prString } of branchesAndPRStrings) {
try {
await github.rest.repos.merge({
owner: context.repo.owner,
repo: context.repo.repo,
base: '${{ github.event.inputs.combineBranchName }}',
head: branch,
});
console.log('Merged branch ' + branch);
combinedPRs.push(prString);
} catch (error) {
console.log('Failed to merge branch ' + branch);
mergeFailedPRs.push(prString);
}
}
console.log('Creating combined PR');
const combinedPRsString = combinedPRs.join('\n');
let body = '✅ This PR was created by the Combine PRs action by combining the following PRs:\n' + combinedPRsString;
if(mergeFailedPRs.length > 0) {
const mergeFailedPRsString = mergeFailedPRs.join('\n');
body += '\n\n⚠️ The following PRs were left out due to merge conflicts:\n' + mergeFailedPRsString
}
await github.rest.pulls.create({
owner: context.repo.owner,
repo: context.repo.repo,
title: 'Combined PR',
head: '${{ github.event.inputs.combineBranchName }}',
base: baseBranch,
body: body
});