scripts/check_versions

#!/bin/bash
# Copyright 2021 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# Checks that if we're modifying a Debian package we're bumping the version
# number. This is a very rough check, we assume any folder with a BUILD file is
# a Debian package and that any changes to any files in the folder are
# meaningful and require a version bump. This has some false positives (e.g.
# changing a comment) but can always ignore the check if it's really, truly, a
# false positive (or bump the version anyway, besides mesa our packages are
# small).

declare -r PRESUBMIT_COMMIT
target=${PRESUBMIT_COMMIT}~..${PRESUBMIT_COMMIT}

files=$(git diff --name-only "${target}")


failures=()
for file in $files; do
    dir=$(dirname "${file}")

    # cros-debs is the parent build file, not actually a package, so there's no
    # version number to increment.
    if [[ "${dir}" == "cros-debs" ]]; then
        continue
    fi

    if [[ -f "${dir}/BUILD" ]]; then
        # Assume it's a bazel package, look for a version change.
        if ! git diff -U0 "${target}" "${dir}/BUILD" |
            grep 'version = ' > /dev/null; then
            if [[ ! " ${failures[*]} " =~ " ${dir} " ]]; then
                echo -n "The package in ${dir} was modified but the version "
                echo -n "number wasn't increased. Please increment the version "
                echo "number"
                failures+=("${dir}")
            fi
        fi
    fi
done

# Our error code is the number of failing folders. If no violations found then
# we return 0 for success.
exit ${#failures[@]}