Add license checking (#1353)

It's stated in the Guidelines that all contributions must be under
the Apache License 2.0. To avoid potential mistakes from manual
reviews, this patch adds the check-license.py script to
automatically check all source files for license headers.

Travis CI is also configured to run the check.

Fallout: it turned out that some files already in the code base
either miss a license header or have some minor typo differences.
The patch fixes up some of these deficiences.

JerryScript-DCO-1.0-Signed-off-by: Akos Kiss akiss@inf.u-szeged.hu

.travis.yml

@@ -5,7 +5,7 @@ dist: trusty
 sudo: required
 
 env:
-  - OPTS="--check-signed-off-travis --check-cppcheck --check-vera"
+  - OPTS="--check-signed-off-travis --check-cppcheck --check-vera --check-license"
   - OPTS="--jerry-tests --jerry-test-suite"
   - OPTS="--jerry-tests --jerry-test-suite --toolchain=cmake/toolchain_linux_armv7l.cmake" TIMEOUT=300 INSTALL_QEMU_ARM=yes
   - OPTS=--buildoption-test

jerry-core/jrt/jrt.h

@@ -1,6 +1,6 @@
 /* Copyright 2014-2016 Samsung Electronics Co., Ltd.
  * Copyright 2016 University of Szeged.
-
+ *
  * 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

targets/mbed/js/blink.js

@@ -1,3 +1,19 @@
+/* Copyright 2015-2016 Samsung Electronics Co., Ltd.
+ * Copyright 2016 University of Szeged.
+ *
+ * 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.
+ */
+
 var check = 1;
 
 function blink ()

targets/mbed/js/main.js

@@ -1,3 +1,18 @@
+/* Copyright 2015-2016 Samsung Electronics Co., Ltd.
+ *
+ * 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.
+ */
+
 function sysloop (ticknow)
 {
   blink ();

targets/zephyr/src/getline-zephyr.c

@@ -1,5 +1,4 @@
-/*
- * Copyright (c) 2016 Linaro
+/* Copyright (c) 2016 Linaro
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -8,7 +7,7 @@
  *     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,
+ * 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.

targets/zephyr/src/getline-zephyr.h

@@ -1,5 +1,4 @@
-/*
- * Copyright (c) 2016 Linaro
+/* Copyright (c) 2016 Linaro
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -8,7 +7,7 @@
  *     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,
+ * 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.

targets/zephyr/src/main-zephyr.c

@@ -4,7 +4,7 @@
  * 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
+ *     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

tests/jerry/date-utc.js

@@ -1,14 +1,14 @@
 // Copyright 2015 Samsung Electronics Co., Ltd.
 // Copyright 2015 University of Szeged.
 //
-// Licensed under the Apache License, Version 2.0 (the License);
+// 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
+//     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
+// 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.

tests/unit/test-libm.inc.h

@@ -1,3 +1,19 @@
+/* Copyright 2016 Samsung Electronics Co., Ltd.
+ * Copyright 2016 University of Szeged.
+ *
+ * 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.
+ */
+
 /*
  * Generated by tools/gen-test-libm.sh
  * DO NOT EDIT!!!

tools/check-license.py

@@ -0,0 +1,86 @@
+#!/usr/bin/env python
+
+# Copyright 2015-2016 Samsung Electronics Co., Ltd.
+# Copyright 2016 University of Szeged
+#
+# 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.
+
+import os
+import re
+import sys
+
+
+license = re.compile(
+u"""((#|//|\*) Copyright .*
+)+\s?\\2
+\s?\\2 Licensed under the Apache License, Version 2.0 \(the "License"\);
+\s?\\2 you may not use this file except in compliance with the License.
+\s?\\2 You may obtain a copy of the License at
+\s?\\2
+\s?\\2     http://www.apache.org/licenses/LICENSE-2.0
+\s?\\2
+\s?\\2 Unless required by applicable law or agreed to in writing, software
+\s?\\2 distributed under the License is distributed on an "AS IS" BASIS
+\s?\\2 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+\s?\\2 See the License for the specific language governing permissions and
+\s?\\2 limitations under the License.""")
+
+dirs = [
+    'cmake',
+    'jerry-core',
+    'jerry-libc',
+    'jerry-libm',
+    'jerry-main',
+    'targets',
+    'tests',
+    'tools',
+]
+
+exclude_dirs = [
+    'targets/esp8266'
+]
+
+exts = [
+    '.c',
+    '.cpp',
+    '.h',
+    '.S',
+    '.js',
+    '.py',
+    '.sh',
+    '.tcl',
+    '.cmake',
+]
+
+
+def main():
+    is_ok = True
+
+    for dname in dirs:
+        for root, _, files in os.walk(dname):
+            if any(root.startswith(exclude) for exclude in exclude_dirs):
+                continue
+            for fname in files:
+                if any(fname.endswith(ext) for ext in exts):
+                    fpath = os.path.join(root, fname)
+                    with open(fpath) as f:
+                        if not license.search(f.read()):
+                            print('%s: incorrect license' % fpath)
+                            is_ok = False
+
+    if not is_ok:
+        sys.exit(1)
+
+
+if __name__ == '__main__':
+    main()

tools/run-tests.py

@@ -31,6 +31,7 @@ parser.add_argument('--check-signed-off-tolerant', action='store_true', default=
 parser.add_argument('--check-signed-off-travis', action='store_true', default=False, help='Run signed-off check in tolerant mode if on Travis CI and not checking a pull request')
 parser.add_argument('--check-cppcheck', action='store_true', default=False, help='Run cppcheck')
 parser.add_argument('--check-vera', action='store_true', default=False, help='Run vera check')
+parser.add_argument('--check-license', action='store_true', default=False, help='Run license check')
 parser.add_argument('--buildoption-test', action='store_true', default=False, help='Run buildoption-test')
 parser.add_argument('--jerry-tests', action='store_true', default=False, help='Run jerry-tests')
 parser.add_argument('--jerry-test-suite', action='store_true', default=False, help='Run jerry-test-suite')
@@ -197,6 +198,9 @@ def main():
     if not ret and (script_args.all or script_args.check_vera):
         ret = run_check(VERA_SCRIPT)
 
+    if not ret and (script_args.all or script_args.check_license):
+        ret = run_check(LICENSE_SCRIPT)
+
     if not ret and (script_args.all or script_args.jerry_tests):
         ret = run_jerry_tests()
 

tools/settings.py

@@ -27,5 +27,6 @@ BUILD_SCRIPT = path.join(TOOLS_DIR, 'build.py')
 CPPCHECK_SCRIPT = path.join(TOOLS_DIR, 'check-cppcheck.sh')
 SIGNED_OFF_SCRIPT = path.join(TOOLS_DIR, 'check-signed-off.sh')
 VERA_SCRIPT = path.join(TOOLS_DIR, 'check-vera.sh')
+LICENSE_SCRIPT = path.join(TOOLS_DIR, 'check-license.py')
 TEST_RUNNER_SCRIPT = path.join(TOOLS_DIR, 'runners/run-test-suite.sh')
 UNITTEST_RUNNER_SCRIPT = path.join(TOOLS_DIR, 'runners/run-unittests.sh')

tools/unit-tests/gen-test-libm.c

@@ -33,7 +33,23 @@
 int
 main (int argc, char **args)
 {
-  printf ("/*\n"
+  printf ("/* Copyright 2016 Samsung Electronics Co., Ltd.\n"
+          " * Copyright 2016 University of Szeged.\n"
+          " *\n"
+          " * Licensed under the Apache License, Version 2.0 (the \"License\");\n"
+          " * you may not use this file except in compliance with the License.\n"
+          " * You may obtain a copy of the License at\n"
+          " *\n"
+          " *     http://www.apache.org/licenses/LICENSE-2.0\n"
+          " *\n"
+          " * Unless required by applicable law or agreed to in writing, software\n"
+          " * distributed under the License is distributed on an \"AS IS\" BASIS\n"
+          " * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n"
+          " * See the License for the specific language governing permissions and\n"
+          " * limitations under the License.\n"
+          " */\n"
+          "\n"
+          "/*\n"
           " * Generated by tools/gen-test-libm.sh\n"
           " * DO NOT EDIT!!!\n"
           " */\n");