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#!/usr/bin/env bash
#==========================================================================
#
# Copyright Insight Software Consortium
#
# 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.txt
#
# 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.
#
#==========================================================================*/
# This is a list of third party libraries we maintain as Git subtree's
# and the URL with their contribution instructions.
#
# The third party name used should be same as the directory name in
# ITK/Modules/ThirdParty/
third_party_contrib_urls=( "KWSys:https://www.itk.org/Wiki/KWSys/Git/Develop"
"MetaIO:https://github.com/Kitware/MetaIO/blob/master/CONTRIBUTING.rst"
"GDCM:http://gdcm.sourceforge.net/wiki/index.php/Git"
"VNL:https://github.com/vxl/vxl" )
upstream_subtree_regex='Modules/ThirdParty/[^/]+/src/[^/]+/'
changed_upstream_dirs=$(git diff --name-only HEAD~1.. |
egrep -o $upstream_subtree_regex | uniq)
if test -z "$changed_upstream_dirs"; then
exit
fi
echo "$changed_upstream_dirs" |
while read upstream_dir; do
lib=$(echo "$upstream_dir" | sed -e 's%Modules/ThirdParty/\([^/]\+\)/src/[^/]\+/%\1%')
subject=$(git show -s --format=%f HEAD)
patchfile=/tmp/${lib}-${subject}.patch
sha=$(git rev-parse --short HEAD)
contrib_url=""
for third_party in "${third_party_contrib_urls[@]}"; do
name=${third_party%%:*}
url=${third_party#*:}
if test "$name" = "$lib"; then
contrib_url="$url"
break
fi
done
top_level_dir=$(git rev-parse --show-toplevel)
cat << EOF
Changes were detected to the third party library $lib. If the change is
relevant to the upstream library, please submit it upstream.
To create a patch file that can be contributed upstream, run:
git diff -p --relative="$upstream_dir" $sha~1..$sha -- "$top_level_dir/$upstream_dir" > "$patchfile"
EOF
if test -n "$contrib_url"; then
cat << EOF
Submit the patch file to the upstream library as instructed at
$contrib_url
EOF
fi
cat << EOF
The patch can be applied to a local $lib repository with
cd /path/to/$lib
patch -p1 < $patchfile
EOF
done
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