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-rw-r--r--resources/libraries/bash/entry/check/gpl_license.sh73
1 files changed, 73 insertions, 0 deletions
diff --git a/resources/libraries/bash/entry/check/gpl_license.sh b/resources/libraries/bash/entry/check/gpl_license.sh
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+# Copyright (c) 2020 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -exuo pipefail
+
+# This file should be executed from tox, as the assumed working directory
+# is different from where this file is located.
+# This file does not have executable flag nor shebang,
+# to dissuade non-tox callers.
+
+# This script runs a few grep-based commands and fails
+# if it detects any file edited or added since HEAD~
+# containing a copyright notice in first 3 lines,
+# but not GPL-based license.
+# The offending files are stored to gpl_license.log (overwriting).
+
+# "set -eu" handles failures from the following two lines.
+BASH_CHECKS_DIR="$(dirname $(readlink -e "${BASH_SOURCE[0]}"))"
+BASH_FUNCTION_DIR="$(readlink -e "${BASH_CHECKS_DIR}/../../function")"
+source "${BASH_FUNCTION_DIR}/common.sh" || {
+ echo "Source failed." >&2
+ exit 1
+}
+
+IFS=$'\n'
+gpl_files=($(git diff --name-only HEAD~ | grep '^GPL/' || true))
+unset IFS
+logfile="gpl_license.log"
+truncate -s 0 "${logfile}" || die
+# A change can have thousands of files, supress console output in the cycle.
+set +x
+for fil in "${gpl_files[@]}"; do
+ if head -n 3 "${fil}" | fgrep -iq 'Copyright'; then
+ # Copyrighted file, processed below.
+ true
+ else
+ # Uncopyrighted files are allowed.
+ # TODO: Should we have list of extesions that require Copyright?
+ continue
+ fi
+ if fgrep -q 'GNU General Public License v2.0 or later' "${fil}"; then
+ # This can be GPL only or the OR license, we accept both.
+ # TODO: Should we require "Apache-2.0 OR GPL-2.0-or-later"?
+ continue
+ else
+ echo "GPL license not detected: ${fil}" >> "${logfile}"
+ fi
+done
+set -x
+lines="$(< "${logfile}" wc -l)"
+if [ "${lines}" != "0" ]; then
+ # TODO: Decide which text goes to stdout and which to stderr.
+ warn "Wrong licensed files in GPL directory detected: ${lines}"
+ # TODO: Disable when output size does more harm than good.
+ pwd
+ cat "${logfile}" >&2
+ warn
+ warn "GPL license checker: FAIL"
+ exit 1
+fi
+
+warn
+warn "GPL license checker: PASS"