Add script for removing Apache header.

* Can be used to remove the license header added with add_apache_header.sh

Author: orionr

scripts/apache_python.txt

@@ -0,0 +1,15 @@
+# Copyright (c) 2016-present, Facebook, Inc.
+#
+# 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.
+##############################################################################
+

scripts/remove_apache_header.sh

@@ -0,0 +1,13 @@
+if [[ "$1" == *.py ]]; then
+  apache_header="apache_python.txt"
+else
+  apache_header="apache_header.txt"
+fi
+apache_lines=$(wc -l < "${apache_header}")
+apache_md5=$(cat "${apache_header}" | md5)
+header_md5=$(head -n ${apache_lines} $1 | md5)
+if [ "${header_md5}" == "${apache_md5}" ]; then
+  keep_lines=$(($(wc -l < $1) - ${apache_lines}))
+  tail -n ${keep_lines} $1 > _remove_apache_header.txt
+  mv _remove_apache_header.txt $1
+fi

scripts/temp.sh

@@ -1,6 +1,7 @@
-find ../caffe2 -name "*.h" -exec ./add_apache_header.sh {} \;
-find ../caffe2 -name "*.cc" -exec ./add_apache_header.sh {} \;
-find ../caffe2 -name "*.cpp" -exec ./add_apache_header.sh {} \;
-find ../caffe2 -name "*.cu" -exec ./add_apache_header.sh {} \;
-find ../caffe2 -name "*.mm" -exec ./add_apache_header.sh {} \;
-find ../caffe2 -name "*.m" -exec ./add_apache_header.sh {} \;
+find ../caffe2 -name "*.py" -exec ./remove_apache_header.sh {} \;
+find ../caffe2 -name "*.h" -exec ./remove_apache_header.sh {} \;
+find ../caffe2 -name "*.cc" -exec ./remove_apache_header.sh {} \;
+find ../caffe2 -name "*.cpp" -exec ./remove_apache_header.sh {} \;
+find ../caffe2 -name "*.cu" -exec ./remove_apache_header.sh {} \;
+find ../caffe2 -name "*.mm" -exec ./remove_apache_header.sh {} \;
+find ../caffe2 -name "*.m" -exec ./remove_apache_header.sh {} \;