Function generateGitStatusScript

src/common/utils/git/gitStatus.ts:13–112

(baseRef?: string)

 *                  If not provided or not an origin/ ref, auto-detects.
 */
export function generateGitStatusScript(baseRef?: string): string {
  // Extract branch name if it's an origin/ ref, otherwise empty for auto-detect
  const preferredBranch = baseRef?.startsWith("origin/") ? baseRef.replace(/^origin\//, "") : "";
  // Security rationale: baseRef is client-controlled in some IPC paths, so quote as a single-quoted
  // shell literal to prevent command substitution / quote-breaking injection when embedding in bash.
  const shellSafePreferredBranch = `'${preferredBranch.replace(/'/g, `'\\''`)}'`;

  return `
# Determine primary branch to compare against
PRIMARY_BRANCH=""
PREFERRED_BRANCH=${shellSafePreferredBranch}

# Try preferred branch first if specified
if [ -n "$PREFERRED_BRANCH" ]; then
  if git rev-parse --verify "refs/remotes/origin/$PREFERRED_BRANCH" >/dev/null 2>&1; then
    PRIMARY_BRANCH="$PREFERRED_BRANCH"
  fi
fi

# Fall back to auto-detection
if [ -z "$PRIMARY_BRANCH" ]; then
  # Method 1: symbolic-ref (fastest)
  PRIMARY_BRANCH=$(git symbolic-ref refs/remotes/origin/HEAD 2>/dev/null | sed 's@^refs/remotes/origin/@@')

  # Method 2: remote show origin (fallback)
  if [ -z "$PRIMARY_BRANCH" ]; then
    PRIMARY_BRANCH=$(git remote show origin 2>/dev/null | grep 'HEAD branch' | cut -d' ' -f5)
  fi

  # Method 3: check for main or master
  if [ -z "$PRIMARY_BRANCH" ]; then
    PRIMARY_BRANCH=$(git branch -r 2>/dev/null | grep -E 'origin/(main|master)$' | head -1 | sed 's@^.*origin/@@')
  fi
fi

# Exit if we can't determine primary branch
if [ -z "$PRIMARY_BRANCH" ]; then
  echo "ERROR: Could not determine primary branch"
  exit 1
fi

# Avoid sampling while git is holding the index lock (e.g., mid-commit)
GIT_DIR=$(git rev-parse --git-dir 2>/dev/null || echo "")
if [ -n "$GIT_DIR" ]; then
  LOCK_PATH="$GIT_DIR/index.lock"
  retries=0
  while [ -f "$LOCK_PATH" ] && [ $retries -lt 20 ]; do
    sleep 0.05
    retries=$((retries + 1))
  done
fi

# Stable ahead/behind counts (rev-list is format-stable across git versions)
AHEAD_BEHIND=$(git rev-list --left-right --count HEAD..."origin/$PRIMARY_BRANCH" 2>/dev/null || echo "")
if [ -z "$AHEAD_BEHIND" ]; then
  AHEAD_BEHIND="0 0"
fi