git-scripts/hooks/update.format.full

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#!/usr/bin/env bash
set -u
set -e
ref_name=$1
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old_rev=$2
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new_rev=$3
# Here you can use whatever formatter you like
# and set up the error (or success) output as you wish
format() {
local my_work_tree=$1
pushd $my_work_tree >/dev/null
# briefly allow non-zero exit status
set +e
local my_diffs=$(2>&1 /usr/local/bin/prettier './**/*.{js,css,html,json,md}' --list-different | grep -v 'No matching files')
set -e
# Show a friendly error message to the git user downstream (if there are files to fix)
if [ -n "$my_diffs" ]; then
>&2 echo ""
>&2 echo "Please run prettier on the following files (and double check your .prettierrc):"
echo "$my_diffs" | while read my_word; do
>&2 echo " $my_word"
done
>&2 echo ""
>&2 echo "Example:"
>&2 echo " npm install -g prettier"
>&2 echo " prettier './**/*.{js,css,html,json,md}' --write"
>&2 echo ""
fi
popd >/dev/null
# This is the "return" value
echo $my_diffs
}
# This is all pretty generic - just checking out files to lint/format and running said formatter
case "${ref_name}" in
refs/heads/*)
# match empty commit 0000000000000000000000000000000000000000
# all deletes should be successful (no files to check against)
if [ "$(expr "${new_rev}" : '0*$')" -ne 0 ]; then
exit 0
fi
# We don't want a race condition if multiple people push while a check is in progress
# For this reason we first checkout all of the files in HEAD and the copy over the changed files.
# We also need to remove any deleted files.
#
# ex: /tmp/git-work-tree.abc123xyz
my_work_tree=$(mktemp -d -t git-work-tree.XXXXXXXX) 2>/dev/null
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if [ "$(expr "${old_rev}" : '0*$')" -ne 0 ]; then
# Ignore "fatal: You are on a branch yet to be born"
set +e
fi
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git --work-tree="${my_work_tree}" --git-dir="." checkout -f >/dev/null
my_changes=$(git --work-tree="${my_work_tree}" --git-dir="." diff --name-status HEAD $new_rev)
if [ -n "$(echo "$my_changes" | grep -e "^A")" ]; then
echo "$my_changes" | grep -e "^A" | cut -f 2 | \
xargs git --work-tree="${my_work_tree}" --git-dir="." checkout $new_rev --
fi
if [ -n "$(echo "$my_changes" | grep -e "^M")" ]; then
echo "$my_changes" | grep -e "^M" | cut -f 2 | \
xargs git --work-tree="${my_work_tree}" --git-dir="." checkout $new_rev --
fi
if [ -n "$(echo "$my_changes" | grep -e "^D")" ]; then
echo "$my_changes" | grep -e "^D" | cut -f 2 | \
xargs git --work-tree="${my_work_tree}" --git-dir="." rm -rf -- >/dev/null
fi
# Now we run the formatter, do some cleanup, and error out if needed
my_failure=$(format $my_work_tree)
rm -rf "${my_work_tree}"
if [ -n "$my_failure" ]; then
exit 1
fi
;;
refs/tags/*)
# allowing tags to be made regardless of formatting (such as old versions)
exit 0
;;
*)
# allowing all other things (not sure what they are though, TBH)
exit 0
;;
esac