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Last active August 30, 2021 11:47
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Post-receive git hook to check if file changed
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post-receive
#!/bin/bash
WATCH_FILE="abc.123"
while read oldrev newrev refname; do
if [ "$refname" = "refs/heads/master" ]; then
if git diff-tree --name-only -r -z $oldrev $newrev | grep --quiet $WATCH_FILE ; then
# WATCH_FILE changed...
fi
fi
done
@loafer-mka
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loafer-mka commented Dec 11, 2019 •
edited
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  1. git diff-tree --name-only -r -z $oldrev $newrev | grep --quiet $WATCH_FILE
    will search any substring which may be part of filename, soo it return true for 'foo${WATCH_FILE}bar'

! git diff-tree --exit-code --name-only -r -z $oldrev $newrev -- "$WATCH_FILE"
note: exit code will be 1 if $WATCH_FILE changed

  1. $oldrev is 0000000000000000000000000000000000000000 for new branch, so git diff-tree will fail for each new branch. As long as you are limited only by existing branches, then everything is correct. But in general, this does not work.

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