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path: root/aux/workflow/sign-tarballs.sh
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#!/bin/sh
set -eu

while getopts 'n:' flag; do
	case "$flag" in
		n)
			PROJECT="$OPTARG"
			;;
		*)
			exit 2
			;;
	esac
done
shift $((OPTIND -1))

assert_arg() {
	if [ -z "$1" ]; then
		echo "Missing $2" >&2
		exit 2
	fi
}

assert_arg "${PROJECT:-}" '-n PROJECT'


SIGNATURES="$(git notes --ref=refs/notes/signatures/tar.xz list | cut -d\  -f2)"
for tag in $(git tag); do
	COMMIT="$(git rev-list -n1 "$tag")"
	if ! echo "$SIGNATURES" | grep -qF "$COMMIT"; then
		echo "Adding missing signature to $tag" >&2
		git notes --ref=refs/notes/signatures/tar.xz add -C "$(
			git archive --format tar.xz --prefix "$PROJECT-$tag/" "$tag" |
			gpg --output - --armor --detach-sign |
			git hash-object -w --stdin
		)" "$tag"
	fi
done