spec-kit/extensions/git/scripts/bash/git-common.sh

#!/usr/bin/env bash
# Git-specific common functions for the git extension.
# Extracted from scripts/bash/common.sh — contains only git-specific
# branch validation and detection logic.

# Check if we have git available
has_git() {
    git rev-parse --show-toplevel >/dev/null 2>&1
}

# Validate that a branch name matches the expected feature branch pattern.
# Accepts sequential (###-*) or timestamp (YYYYMMDD-HHMMSS-*) formats.
check_feature_branch() {
    local branch="$1"
    local has_git_repo="$2"

    # For non-git repos, we can't enforce branch naming but still provide output
    if [[ "$has_git_repo" != "true" ]]; then
        echo "[specify] Warning: Git repository not detected; skipped branch validation" >&2
        return 0
    fi

    if [[ ! "$branch" =~ ^[0-9]{3}- ]] && [[ ! "$branch" =~ ^[0-9]{8}-[0-9]{6}- ]]; then
        echo "ERROR: Not on a feature branch. Current branch: $branch" >&2
        echo "Feature branches should be named like: 001-feature-name or 20260319-143022-feature-name" >&2
        return 1
    fi

    return 0
}