Git variables

git variables read repository metadata by running git commands. They are readonly, but still interact with the local repository and process environment.

branchName: ${git:branch, "main"}
shortSha: ${git:sha1, "unknown"}

Use fallbacks when a config may resolve outside a git checkout. Common keys include branch, commit, sha1, message, remote, tag, describe, repo, owner, and timestamp.

See safe inspection for audit behavior and use in CI for automation patterns.