FAB-3676 add check_license

Change-Id: Ibb4bbd088bd1e7409e39825f9256a95509e2a751
Signed-off-by: Christopher Ferris <chrisfer@us.ibm.com>

build/tasks/chklic.js

@@ -0,0 +1,6 @@
+// SPDX-License-Identifier: Apache-2.0
+
+const gulp = require('gulp');
+const shell = require('gulp-shell');
+
+gulp.task('check_license', shell.task('./scripts/check_license.sh'));

gulpfile.js

@@ -9,6 +9,6 @@ var gulp = require('gulp');
 // Require all tasks in gulp/tasks, including subfolders
 requireDir('./build/tasks', { recurse: true });
 
-gulp.task('default', ['lint'], function () {
+gulp.task('default', ['lint', 'check_license'], function () {
 		// This will only run if the lint task is successful...
 });

scripts/check_license.sh

@@ -0,0 +1,63 @@
+#!/bin/bash
+#
+# Copyright IBM Corp, SecureKey Technologies Inc. All Rights Reserved.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+function filterExcludedFiles {
+  CHECK=`echo "$CHECK" \
+		| grep -v "^\.git/" \
+		| grep -v "^\.build/" \
+		| grep -v "^vendor/" \
+		| grep -v "testdata/" \
+		| grep -v "^LICENSE$" \
+		| grep -v "\.png$" \
+		| grep -v "\.rst$" \
+		| grep -v "\.pem$" \
+		| grep -v "\.block$" \
+		| grep -v "\.tx$" \
+		| grep -v "_sk$" \
+		| grep -v "\.key$" \
+		| grep -v "\.gen\.go$" \
+		| grep -v "^Gopkg\.lock$" \
+		| grep -v "\.md$" \
+		| grep -v "\.pb\.go$" \
+		| sort -u`
+}
+
+CHECK=$(git diff --name-only --diff-filter=ACMRTUXB HEAD)
+filterExcludedFiles
+if [[ -z "$CHECK" ]]; then
+  LAST_COMMITS=($(git log -2 --pretty=format:"%h"))
+  CHECK=$(git diff-tree --no-commit-id --name-only --diff-filter=ACMRTUXB -r ${LAST_COMMITS[1]} ${LAST_COMMITS[0]})
+  filterExcludedFiles
+fi
+
+if [[ -z "$CHECK" ]]; then
+   echo "All files are excluded from having license headers"
+   exit 0
+fi
+
+missing=`echo "$CHECK" | xargs ls -d 2>/dev/null | xargs grep -L "SPDX-License-Identifier"`
+if [[ -z "$missing" ]]; then
+   echo "All files have SPDX-License-Identifier headers"
+   exit 0
+fi
+echo "The following files are missing SPDX-License-Identifier headers:"
+echo "$missing"
+echo
+echo "Please replace the Apache license header comment text with:"
+echo "SPDX-License-Identifier: Apache-2.0"
+
+echo
+echo "Checking committed files for traditional Apache License headers ..."
+missing=`echo "$missing" | xargs ls -d 2>/dev/null | xargs grep -L "http://www.apache.org/licenses/LICENSE-2.0"`
+if [[ -z "$missing" ]]; then
+   echo "All remaining files have Apache 2.0 headers"
+   exit 0
+fi
+echo "The following files are missing traditional Apache 2.0 headers:"
+echo "$missing"
+echo "Fatal Error - All files must have a license header"
+exit 1