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lib_git.sh

Git helpers for Bash commands that need lightweight repository inspection or update behavior.

Dependency

Source lib/bash/std/lib_std.sh before this library so logging and shared error handling are available.

Public API

  • git_update_repo Update a repository on its detected default branch, optionally allowing tracked changes in one specific path.
  • git_get_current_branch Return the current branch name through a caller-provided variable, or detached head.
  • check_script_up_to_date Check whether a tracked script appears current relative to its configured upstream.

Internal Helper

  • _git_only_path_dirty Internal predicate used by git_update_repo when an allowed dirty path is provided.

Usage

source "/absolute/path/to/lib/bash/std/lib_std.sh"
source "/absolute/path/to/lib/bash/git/lib_git.sh"

branch=""
git_get_current_branch "$PWD" branch
log_info "Current branch: $branch"

Behavior Notes

  • git_update_repo only attempts updates when the checked-out branch is the detected default branch, or an explicit expected branch passed by the caller.
  • git_update_repo retries git pull --ff-only twice by default. Set BASE_GIT_PULL_MAX_ATTEMPTS to a positive integer to change the retry count.
  • git_get_current_branch uses git -C so it does not change the caller's working directory or directory stack. Missing directories and non-Git directories return success with an empty result variable.
  • git_update_repo changes into the target repository while it runs because its submodule update sequence depends on repository-relative execution.
  • check_script_up_to_date treats missing git state, untracked scripts, or missing upstreams as skip conditions rather than hard failures.
  • check_script_up_to_date <script> compares HEAD with the local remote-tracking upstream ref. It does not fetch by default, so the result reflects the freshness of local refs.
  • check_script_up_to_date --fetch <script> runs git fetch --quiet first, then compares against the refreshed upstream ref. If fetch fails, the helper logs a warning and falls back to local remote-tracking refs.

Tests

BATS coverage lives in tests/lib_git.bats.