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name: Repo Sync
# Syncs main between github/docs and github/docs-internal so public docs stay current
# and sensitive work stays private. Mechanics: https://github.com/repo-sync/repo-sync#how-it-works
on:
workflow_dispatch:
schedule:
- cron: '20 14-23/3 * * 1-5'
permissions:
contents: write
pull-requests: write
jobs:
repo-sync:
if: github.repository == 'github/docs-internal' || github.repository == 'github/docs'
name: Repo Sync
runs-on: ubuntu-latest
steps:
- name: Check out repo
uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
with:
persist-credentials: false
- name: Sync repo to branch
env:
SOURCE_REPO: https://${{ secrets.DOCS_BOT_PAT_REPO_SYNC }}@github.com/github/${{ github.repository == 'github/docs-internal' && 'docs' || 'docs-internal' }}.git
SOURCE_BRANCH: main
DESTINATION_BRANCH: repo-sync
GH_TOKEN: ${{ secrets.DOCS_BOT_PAT_REPO_SYNC }}
run: |
set -euo pipefail
: "${GH_TOKEN:?DOCS_BOT_PAT_REPO_SYNC is empty}"
: "${SOURCE_REPO:?SOURCE_REPO is empty}"
: "${SOURCE_BRANCH:?SOURCE_BRANCH is empty}"
: "${DESTINATION_BRANCH:?DESTINATION_BRANCH is empty}"
git config --unset-all http."https://github.com/".extraheader || true
git remote remove tmp_upstream 2>/dev/null || true
trap 'git remote remove tmp_upstream 2>/dev/null || true' EXIT
git remote set-url origin "https://x-access-token:${GH_TOKEN}@github.com/${GITHUB_REPOSITORY}.git"
git remote add tmp_upstream "${SOURCE_REPO}"
git fetch tmp_upstream --quiet
git push origin "refs/remotes/tmp_upstream/${SOURCE_BRANCH}:refs/heads/${DESTINATION_BRANCH}" --force
- name: Ship pull request
uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3
with:
github-token: ${{ secrets.DOCS_BOT_PAT_REPO_SYNC }}
result-encoding: string
script: |
const { owner, repo } = context.repo
const head = 'github:repo-sync'
const base = 'main'
async function closePullRequest(prNumber) {
console.log('Closing pull request', prNumber)
await github.rest.pulls.update({
owner,
repo,
pull_number: prNumber,
state: 'closed'
})
// Let close failures fail the workflow.
console.log('Closed pull request', prNumber)
}
console.log('Closing any existing pull requests')
const { data: existingPulls } = await github.rest.pulls.list({ owner, repo, head, base })
if (existingPulls.length) {
console.log('Found existing pull requests', existingPulls.map(pull => pull.number))
for (const pull of existingPulls) {
await closePullRequest(pull.number)
}
console.log('Closed existing pull requests')
}
try {
const { data } = await github.rest.repos.compareCommits({
owner,
repo,
head,
base,
})
const { files } = data
console.log(`File changes between ${head} and ${base}:`, files)
if (!files.length) {
console.log('No files changed, bailing')
return
}
} catch (err) {
console.error(`Unable to compute the files difference between ${head} and ${base}`, err.message)
}
console.log('Creating a new pull request')
const body = `
This is an automated pull request to sync changes between the public and private repos.
Our bot will merge this pull request automatically.
To preserve continuity across repos, _do not squash_ this pull request.
`
let pull, pull_number
try {
const response = await github.rest.pulls.create({
owner,
repo,
head,
base,
title: 'Repo sync',
body,
})
pull = response.data
pull_number = pull.number
console.log('Created pull request successfully', pull.html_url)
} catch (err) {
// Don't alert on "No commits" or on the "same head_sha" error from over 100 PRs with one head.
if (err.message?.includes('No commits') || err.message?.includes('same head_sha')) {
console.log(err.message)
return
}
throw err
}
console.log('Locking conversations to prevent spam')
try {
await github.rest.issues.lock({
...context.repo,
issue_number: pull_number,
lock_reason: 'spam'
})
console.log('Locked the pull request to prevent spam')
} catch (error) {
console.error('Failed to lock the pull request.', error)
// Lock failures must not fail the sync.
}
console.log('Counting files changed')
const { data: prFiles } = await github.rest.pulls.listFiles({ owner, repo, pull_number })
if (prFiles.length) {
console.log(prFiles.length, 'files have changed')
} else {
console.log('No files changed, closing')
await closePullRequest(pull_number)
return
}
console.log('Checking for merge conflicts')
if (pull.mergeable_state === 'dirty') {
console.log('Pull request has a conflict', pull.html_url)
await closePullRequest(pull_number)
throw new Error('Pull request has a conflict, please resolve manually')
}
console.log('No detected merge conflicts')
console.log('Merging the pull request')
// merge_method: merge keeps merge commits; retry each minute for up to 15 minutes for checks.
const maxAttempts = 15
const delay = 60_000
for (let attempt = 1; attempt <= maxAttempts; attempt++) {
try {
await github.rest.pulls.merge({
owner,
repo,
pull_number,
merge_method: 'merge',
})
console.log('Merged the pull request successfully')
break
} catch (mergeError) {
const msg = mergeError.message || mergeError.response?.data?.message || ''
const isRuleViolation = mergeError.status === 405 &&
msg.includes('Repository rule violations')
if (!isRuleViolation || attempt === maxAttempts) {
throw mergeError
}
console.log(`Merge blocked by required checks (attempt ${attempt}/${maxAttempts}), retrying in 60s...`)
await new Promise(resolve => setTimeout(resolve, delay))
}
}
- uses: ./.github/actions/create-workflow-failure-issue
id: create-failure-issue
if: ${{ failure() && github.event_name != 'workflow_dispatch' }}
with:
token: ${{ secrets.DOCS_BOT_PAT_BASE }}
- uses: ./.github/actions/slack-alert
if: ${{ failure() && github.event_name != 'workflow_dispatch' }}
with:
slack_token: ${{ secrets.SLACK_DOCS_BOT_TOKEN }}
issue_url: ${{ steps.create-failure-issue.outputs.issue_url }}