google/copybara

Health v2 · maintenance only

Adoption not part of the score

3815 stars · 344 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Copybara is a Java-based command-line tool from Google that transforms and moves code between repositories, keeping a confidential and a public repository in sync. It is stateless, storing state in destination commit labels, and is configured via Starlark workflow files.

Use cases

• sync code between a private and public git repository
• mirror changes from a public repo into an internal repo
• import external contributor patches into an authoritative repository
• transform code paths when moving code to a new repository
• automate repetitive code movement between repositories

When to choose

• you maintain confidential and public versions of the same code
• you need repeatable, stateless repository-to-repository code migration
• you want to transform code (paths, references) during sync

When to avoid

• you need one-time simple git mirroring without transformations
• you require non-Git version control systems (Mercurial support is experimental)
• you want a GUI or hosted service rather than a CLI

Facets

cli-tool · maturity active

version-control developer-tools workflow-automation configuration-management developer-tools version-control cli jvm cross-platform code-mirroring repository-sync git monorepo open-source-synchronization automation

Member repositories

For agents

markdown · JSON · MCP: product_card(name="google/copybara")