blob: ffb2cca9728d15933fefa5360f89d15a56e4568e [file] [log] [blame]
# Copyright 2013 The Flutter 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
# Needed because if it is set, cd may print the path it changed to.
unset CDPATH
# On Mac OS, readlink -f doesn't work, so follow_links traverses the path one
# link at a time, and then cds into the link destination and find out where it
# ends up.
# The function is enclosed in a subshell to avoid changing the working directory
# of the caller.
function follow_links() (
cd -P "$(dirname -- "$1")"
file="$PWD/$(basename -- "$1")"
while [[ -h "$file" ]]; do
cd -P "$(dirname -- "$file")"
file="$(readlink -- "$file")"
cd -P "$(dirname -- "$file")"
file="$PWD/$(basename -- "$file")"
echo "$file"
SCRIPT_DIR=$(follow_links "$(dirname -- "${BASH_SOURCE[0]}")")
FLUTTER_DIR="$(cd "$SCRIPT_DIR/.."; pwd -P)"
if git remote get-url upstream >/dev/null 2>&1; then
BEHIND="$(git rev-list "$FLUTTER_VERSION".."$UPSTREAM" --oneline | wc -l)"
MAX_BEHIND=16 # no more than 4 bisections to identify the issue
if [[ $BEHIND -le $MAX_BEHIND ]]; then
echo "OK, the flutter/engine to flutter/flutter roll is only $BEHIND commits behind."
echo "ERROR: The flutter/engine to flutter/flutter roll is $BEHIND commits behind!"
echo " It exceeds our max allowance of $MAX_BEHIND. Unless that this commit fixes the roll,"
echo " please roll engine into flutter first before merging more commits into engine."
exit 1