#!/bin/sh
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#
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# An example hook script to transform a patch taken from an email
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# by git am.
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#
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# The hook should exit with non-zero status after issuing an
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# appropriate message if it wants to stop the commit. The hook is
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# allowed to edit the patch file.
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#
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# To enable this hook, rename this file to "applypatch-transform".
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#
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# This example changes the path of Lib/unittest/mock.py to mock.py
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# Lib/unittest/tests/testmock to tests and Misc/NEWS to NEWS, and
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# finally skips any patches that did not alter mock.py or its tests.
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set -eux
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patch_path=$1
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# Pull out mock.py
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filterdiff --clean --strip 3 --addprefix=a/mock/ -i 'a/Lib/unittest/mock.py' -i 'b/Lib/unittest/mock.py' $patch_path > $patch_path.mock
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# And the tests
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filterdiff --clean --strip 5 --addprefix=a/mock/tests/ -i 'a/Lib/unittest/test/testmock/*.py' -i 'b/Lib/unittest/test/testmock/*.py' $patch_path > $patch_path.tests
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# Lastly we want to pick up any NEWS entries.
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filterdiff --strip 2 --addprefix=a/ -i a/Misc/NEWS -i b/Misc/NEWS $patch_path > $patch_path.NEWS
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cp $patch_path $patch_path.orig
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# bash
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cat $patch_path.mock $patch_path.tests > $patch_path
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filtered=$(cat $patch_path)
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if [ -n "${filtered}" ]; then
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cat $patch_path.NEWS >> $patch_path
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exitcode=0
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else
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exitcode=1
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fi
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rm $patch_path.mock $patch_path.tests $patch_path.NEWS
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exit $exitcode
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