| #!/bin/bash |
| |
| # Copyright 2016 The Fuchsia Authors |
| # Copyright (c) 2015 Travis Geiselbrecht |
| # |
| # Use of this source code is governed by a MIT-style |
| # license that can be found in the LICENSE file or at |
| # https://opensource.org/licenses/MIT |
| |
| readonly OUTFILE="$1" |
| readonly CHECKOUT_ROOT="$2" |
| readonly INPUT_GIT_REV="$3" |
| |
| set -e |
| |
| if [ -z "$INPUT_GIT_REV" ]; then |
| echo "Error: git revision must be provided as the third argument" >&2 |
| exit 1 |
| fi |
| GIT_REV="git-$INPUT_GIT_REV" |
| |
| if [ -n "$(git --no-optional-locks -C "$CHECKOUT_ROOT" status --porcelain --untracked-files=no 2>/dev/null)" ]; then |
| GIT_REV+="-dirty" |
| fi |
| |
| # Update the existing file only if it's changed. |
| if [ ! -r "$OUTFILE" ] || [ "$(<"$OUTFILE")" != "$GIT_REV" ]; then |
| # Make sure not to include a trailing newline! |
| printf '%s' "$GIT_REV" > "$OUTFILE" |
| fi |
