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#!/usr/bin/bash
set -e -o pipefail
ref="$1"
old="$2"
new="$3"
protected_file="$GIT_DIR/protected"
die() {
echo "error: $*" > /dev/stderr
exit 1
}
if [[ -f "$protected_file" ]]; then
while read -r line; do
if grep -q -E "$line" - <<< "$ref" ; then
if grep -q -E "^0+$" <<< "$new"; then
die "protected branch $ref (rule: $line) cannot be deleted"
fi
if ! git merge-base --is-ancestor "$old" "$new"; then
die "protected branch $ref (rule: $line) is not fast-forward $(expr substr "$old" 1 8) -> $(expr substr "$new" 1 8)"
fi
fi
done <"$protected_file"
fi
global_hook="/git/hooks/update"
local_hook="$GIT_DIR/hooks/update"
if [[ -x "$global_hook" ]]; then
"$global_hook" "$ref" "$old" "$new"
fi
if [[ -x "$local_hook" ]]; then
"$local_hook" "$ref" "$old" "$new"
fi
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