| #!/bin/sh |
| # Copyright 2020 The Fuchsia Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| set -e |
| OUTFILE="$1" |
| GIT_DIR="$2" |
| DEP_FILE="$3" |
| |
| if [ ! -d "$GIT_DIR" ]; then |
| echo >&2 "Invalid GIT_DIR provided: $GIT_DIR" |
| fi |
| |
| GIT_REV="$(git --git-dir=${GIT_DIR} rev-parse HEAD 2>/dev/null)" |
| VERSION_INFO="$(TZ=UTC git --git-dir=${GIT_DIR} show --no-patch --no-notes --pretty='%H-%ct' ${GIT_REV} 2> /dev/null)" |
| if [ -z "$VERSION_INFO" ]; then |
| echo >&2 "Failed to gather version information from ${GIT_DIR}" |
| exit 1 |
| fi |
| |
| # Update the existing file only if it's changed. |
| if [ ! -r "$OUTFILE" ] || [ "$(<"$OUTFILE")" != "$VERSION_INFO" ]; then |
| echo "$VERSION_INFO" > "$OUTFILE" |
| fi |
| |
| if [ -n "$DEP_FILE" ]; then |
| mkdir -p "$(dirname "${DEP_FILE}")" |
| echo "${OUTFILE}: ${GIT_DIR%/}/HEAD" > "${DEP_FILE}" |
| fi |
