From 365367136938c189ee6ec683d6a263e117a4564a Mon Sep 17 00:00:00 2001
From: Ludwig Nussel <ludwig.nussel@suse.de>
Date: Wed, 16 Nov 2022 15:01:09 +0100
Subject: [PATCH] start

---
 updatemodules | 80 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100755 updatemodules

diff --git a/updatemodules b/updatemodules
new file mode 100755
index 0000000..88905f3
--- /dev/null
+++ b/updatemodules
@@ -0,0 +1,80 @@
+#!/bin/bash
+pushurl="gitea@gitea.opensuse.org:lnussel/core.git"
+prsrcusr="lnussel"
+prtarget="https://gitea.opensuse.org/api/v1/repos/mold/core/pulls"
+
+modules=($@)
+origin="$(git config --get remote.origin.url)"
+#now="$(date "+%s %z")"
+# FIXME: hardcoded to avoid changing commits for now
+now="1668592380 +0100"
+export GIT_AUTHOR_NAME="Auto"
+export GIT_AUTHOR_EMAIL="auto@suse.de"
+export GIT_AUTHOR_DATE="$now"
+export GIT_COMMITTER_NAME="Auto"
+export GIT_COMMITTER_EMAIL="auto@suse.de"
+export GIT_COMMITTER_DATE="$now"
+
+tmpfile=$(mktemp updatemodules.XXXXXX)
+cleanup()
+{
+	rm -f "$tmpfile"
+}
+trap cleanup EXIT
+
+read token < token || exit 1
+
+declare -A revs
+while read m t cid p; do
+	[ "$t" = "commit" ] || continue
+	revs["$p"]="$cid"
+done < <(git cat-file -p HEAD^{tree})
+
+if [ -z "$modules" ]; then
+       modules=("${!revs[@]}")
+fi
+
+declare -A commits
+for m in "${modules[@]}"; do
+	path="$(git config -f .gitmodules --get "submodule.$m.path")"
+	url="$(git config -f .gitmodules --get "submodule.$m.url")"
+	branch="$(git config -f .gitmodules --get "submodule.$m.branch")"
+	if [ -z "$path" -o -z "$url" ]; then
+		echo "$m unknown" >&2
+		continue
+	fi
+	if [ "${url:0:3}" = '../' ]; then
+		url="$origin/$url"
+	fi
+	read cid _d < <(git ls-remote "$url" "${branch:-HEAD}")
+	if [ -z "${revs[$path]}" ]; then
+		echo "$path unknown" >&2
+		continue
+	fi
+	if [ "${revs[$path]}" != "$cid" ]; then
+		echo "Needs update: $path@${revs[$path]} -> $cid"
+		newtree="$(git cat-file -p HEAD^{tree} | sed -e "s/${revs[$path]}\t$path/$cid\t$path/" | git mktree)"
+		newcid="$(git commit-tree -p HEAD -m "Update $m" "$newtree")"
+		commits["$m"]="$newcid"
+	fi
+done
+
+for m in "${!commits[@]}"; do
+	if git send-pack --force "$pushurl" "${commits[$m]}:refs/heads/update_$m"; then
+		#https://github.com/go-gitea/gitea/issues/18842
+		if curl -s -f "$prtarget" \
+			-H "accept: application/json" \
+			-H "Authorization: token $token" \
+			-H "Content-Type: application/json" \
+			-d "{ \"base\": \"main\", \"head\": \"$prsrcusr:update_$m\", \"title\": \"Update $m\"}" > "$tmpfile"; then
+			prid=$(jq .id < "$tmpfile")
+			echo "filed pr #$prid for $m"
+		else
+			echo "failed to file pr for $m"
+			jq .message < "$tmpfile"
+		fi
+	else
+		echo "failed to push $m update" >&2
+		jq .message < "$tmpfile"
+	fi
+done