warpdotdev/repo-sync

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# repo-sync reusable GitHub workflows and tooling for bidirectional synchronization between a private repository and a public repository. the private repo may contain internal-only code that must never appear in the public repo. repo-sync handles stripping that code automatically and creating sync PRs in both directions. ## how it works when a commit merges to the default branch of either repo, a sync PR is created in the other repo: - **private → public:** a clean snapshot of the private repo is generated (with all internal code stripped), and the diff is applied to the public repo. - **public → private:** the public commit is cherry-picked into the private repo as-is. sync PRs are managed as a **stack** -- each new sync PR is based on the previous one, so conflicts queue up naturally and each PR shows only a single commit's changes. clean sync PRs auto-merge; conflicted ones get an agent-proposed resolution and a human reviewer. for full details, see [docs/PRD.md](docs/PRD.md) and [docs/TECH-DESIGN.md](docs/TECH-DESIGN.md). ## marking internal-only code two mechanisms for keeping code out of the public repo: ### `private` directories any directory named `private` (at any depth) is excluded entirely. this is the simplest option for fully-private modules. ### `!repo-sync` markers for inline private code within otherwise-public files: ```rust fn my_func() { // !repo-sync: private-start println!("this code exists only in our private repo"); // !repo-sync: private-end println!("this code is public"); } ``` the marker lines and everything between them are stripped. markers must be properly paired (every `private-start` needs a `private-end` in the same file) and cannot be nested. ## integration guide ### prerequisites before integrating, ensure the consuming repos have: 1. **a GitHub App** ("sync bot") installed on both repos (and on the `repo-sync` repo itself) with `contents:write`, `pull_requests:write`, `workflows:write`, and `metadata:read` permissions. store the App ID and private key as repo secrets (`REPO_SYNC_APP_ID`, `REPO_SYNC_APP_PRIVATE_KEY`) in both repos. the reusable workflows generate short-lived installation tokens internally. 2. **a second GitHub App** ("approver bot") with `contents:write`, `pull_requests:write`, and `metadata:read` permissions. this app handles approval and conflict resolution for sync PRs — a separate identity is needed because GitHub does not allow a PR's author to approve it. store as `REPO_SYNC_APPROVER_APP_ID` and `REPO_SYNC_APPROVER_APP_PRIVATE_KEY`. 3. **auto-merge enabled** as a repo-level setting. 4. **squash merge** as the merge strategy for PRs, configured to **preserve the PR description** in the commit message. 5. **branch protection rules** on `repo-sync/*` branches, so only the sync workflow's token can create or push to them. 6. **required PR approvals** on the default branch. the approver bot approves clean (conflict-free) sync PRs automatically; conflict-resolved PRs require human approval. ### step 1: bootstrap the public repo the bootstrap script creates the initial public repo from the private repo: ```sh ./scripts/bootstrap.sh \ --private-repo warpdotdev/warp-internal \ --public-repo warpdotdev/warp-public \ --token "$GITHUB_TOKEN" ``` this: - queries the private repo's default branch and uses it for the public repo (both must match) - generates a clean snapshot of the private repo at `HEAD` (stripping all `private/` dirs and `!repo-sync` marker regions) - pushes the snapshot as the initial commit to the public repo - checks that the public repo has no existing commits (refuses to overwrite) - sets watermark tags in both repos so the sync workflows know where to start the token must have `contents:write`, `pull_requests:write`, and `workflows:write` on both repos (the `workflows` scope is needed because the repo may contain `.github/workflows/` files). you can generate one by creating a GitHub App installation token (recommended) or using a fine-grained PAT for one-time use. ### step 2: add the CI validation action (private repo) add marker validation to the private repo's CI so developers catch issues before merging: ```yaml # .github/workflows/validate-markers.yml name: validate markers on: [pull_request] jobs: validate: runs-on: ubuntu-latest steps: - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6 - uses: warpdotdev/repo-sync/actions/validate-markers@main ``` this validates that all `!repo-sync` markers are properly paired, not nested, that no symlinks exist in the repo, and that text Git LFS payloads do not contain repo-sync markers. to validate only selected paths, pass `paths` as a JSON array so file names containing spaces or shell metacharacters are preserved exactly: ```yaml - uses: warpdotdev/repo-sync/actions/validate-markers@main with: paths: '["src/file with spaces.txt", "assets/*.bin"]' ``` ### step 3: add the sync workflow (both repos) add the sync workflow to both repos. see [examples/consuming-repo-sync.yml](examples/consuming-repo-sync.yml) for a complete example. the key pieces are: ```yaml # .github/workflows/repo-sync.yml name: repo-sync on: push: branches: [main] # triggers sync creation pull_request: types: [closed, opened, synchronize, edited, labeled] branches: [main] # triggers restack + approve schedule: - cron: "*/15 * * * *" # triggers escalation checks # store REPO_SYNC_APP_ID and REPO_SYNC_APPROVER_APP_ID as variables, # and their private keys as secrets. jobs: sync: if: github.event_name == 'push' uses: warpdotdev/repo-sync/.github/workflows/sync.yml@main with: public_repo: warpdotdev/warp-public private_repo: warpdotdev/warp-internal app_id: ${{ vars.REPO_SYNC_APP_ID }} secrets: app_private_key: ${{ secrets.REPO_SYNC_APP_PRIVATE_KEY }} restack: if: >- (github.event_name == 'pull_request' && github.event.pull_request.merged == true && startsWith(github.event.pull_request.head.ref, 'repo-sync/')) || (github.event_name == 'pull_request' && github.event.action == 'labeled' && github.event.label.name == 'repo-sync:needs-restack' && startsWith(github.event.pull_request.head.ref, 'repo-sync/')) uses: warpdotdev/repo-sync/.github/workflows/restack.yml@main with: public_repo: warpdotdev/warp-public private_repo: warpdotdev/warp-internal app_id: ${{ vars.REPO_SYNC_APP_ID }} secrets: app_private_key: ${{ secrets.REPO_SYNC_APP_PRIVATE_KEY }} approve: if: github.event_name == 'pull_request' && github.event.action != 'closed' && startsWith(github.event.pull_request.head.ref, 'repo-sync/') uses: warpdotdev/repo-sync/.github/workflows/approve.yml@main with: public_repo: warpdotdev/warp-public private_repo: warpdotdev/warp-internal approver_app_id: ${{ vars.REPO_SYNC_APPROVER_APP_ID }} secrets: approver_app_private_key: ${{ secrets.REPO_SYNC_APPROVER_APP_PRIVATE_KEY }} escalation: if: github.event_name == 'schedule' uses: warpdotdev/repo-sync/.github/workflows/escalation.yml@main with: escalate_to: "@oncall-client-primary" escalate_after: "1h" public_repo: warpdotdev/warp-public private_repo: warpdotdev/warp-internal app_id: ${{ vars.REPO_SYNC_APP_ID }} secrets: app_private_key: ${{ secrets.REPO_SYNC_APP_PRIVATE_KEY }} ``` the same workflow file works in both repos -- the workflows derive which repo is which by comparing `github.repository` against the `private_repo` input. ### step 4: verify after setup, test by merging a small change in each direction: 1. **private → public:** merge a commit to the private repo that modifies public code. a sync PR should appear in the public repo within a few minutes. 2. **public → private:** merge a commit to the public repo. a sync PR should appear in the private repo. 3. **internal-only change:** merge a commit that only modifies code inside `private/` dirs or `!repo-sync` markers. no sync PR should be created. ## conflict resolution when a sync PR reaches the bottom of the stack and has merge conflicts, the approval workflow invokes an Oz agent to propose a resolution. a human reviewer is always requested for sign-off on conflict-resolved PRs. if the agent fails, the PR is assigned to a human without a proposed resolution. if the reviewer doesn't respond within the configured timeout (default: 1 hour), the PR is escalated to the configured team (default: `@oncall-client-primary`). for operational procedures and failure remediation, see [docs/RUNBOOK.md](docs/RUNBOOK.md). ## project structure ``` .agents/skills/ # oz agent skill definitions conflict-resolution/ # generic merge conflict resolution pr-description/ # PR description generation (private→public) .github/workflows/ # reusable GitHub Actions workflows sync.yml # sync PR creation restack.yml # post-merge restacking approve.yml # approval + conflict resolution escalation.yml # cron: timeout, CI failure, stuck stack actions/ validate-markers/ # CI validation composite action docker/ pr-description/ # Dockerfile for agent isolation docs/ # design documents PRD.md # product requirements TECH-DESIGN.md # technical design DECISIONS.md # decision log VALIDATION.md # test cases examples/ consuming-repo-sync.yml # example consuming repo workflow scripts/ bootstrap.sh # one-time bootstrap script src/repo_sync/ # python package strip/ # stripping tool + shared marker library stack/ # stack management + trailer parsing workflows/ # workflow orchestration logic tests/ # pytest test suite ``` ## fixup scripts after stripping, some generated files (e.g., `Cargo.lock`) may reference crates or modules that were removed by the strip step. to handle this, repo-sync supports optional **fixup scripts** that run after stripping but before the sync diff is computed. fixup scripts are configured per-direction via workflow inputs: ```yaml sync: uses: warpdotdev/repo-sync/.github/workflows/sync.yml@main with: public_repo: warpdotdev/warp-public private_repo: warpdotdev/warp-internal app_id: ${{ vars.REPO_SYNC_APP_ID }} private_to_public_fixup_script: scripts/post-strip-fixup.sh secrets: app_private_key: ${{ secrets.REPO_SYNC_APP_PRIVATE_KEY }} ``` **script contract:** - the script receives the working directory (the stripped snapshot) as its sole argument. - it must exit 0 on success; a non-zero exit is treated as a permanent sync failure. - for private→public sync, the script runs on **both** the current and parent snapshots so the diff is computed from two consistently-fixed-up trees. example fixup script that regenerates `Cargo.lock` after stripping: ```sh #!/bin/bash set -e cd "$1" cargo generate-lockfile ``` **supported directions:** - `private_to_public_fixup_script` -- runs after stripping, before diff computation. fully supported. - `public_to_private_fixup_script` -- config surface exists but execution is not yet implemented. ## known limitations - **both repos must use the same default branch** (e.g., both use `main`). the bootstrap script enforces this, and the sync workflows assume it. - **symlinks are not supported.** any symlink in the repo will cause the stripping tool to error. this is a fail-closed safety measure -- symlinks could potentially bypass `private/` directory exclusion. the CI validation action also checks for this. ## documentation - [docs/PRD.md](docs/PRD.md) -- product requirements and high-level behavior - [docs/TECH-DESIGN.md](docs/TECH-DESIGN.md) -- technical design and implementation details - [docs/DECISIONS.md](docs/DECISIONS.md) -- decision log with alternatives and justifications - [docs/VALIDATION.md](docs/VALIDATION.md) -- comprehensive test cases - [docs/RUNBOOK.md](docs/RUNBOOK.md) -- operational procedures for failure scenarios

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설명

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pr-description

소프트웨어 개발자

Read a diff of changes being synced to a public repository and produce a concise, human-readable PR title and description.

원문 언어: 영어

2026-04-22

conflict-resolution

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Resolve git merge conflicts on the current branch and commit the result.

원문 언어: 영어

2026-04-10

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