Add git role

roles/git-server/templates/update.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+# {{ ansible_managed }}
+
+set -euo pipefail
+
+install="{{ git_server_working_dir }}"
+arch="linux-amd64"
+
+version=$(curl -s https://forgejo.org/releases/rss.xml | xq -x '//rss/channel/item[1]/title' | sed 's/^v//')
+if [[ ! $version =~ ^[0-9]+\.[0-9]+\.[0-9\-]+$ ]]; then
+    echo "invalid version: $version"
+    exit 1
+fi
+
+ofile="$install/forgejo-$version"
+if [ ! -e "$ofile" ]; then
+    curl -s "https://codeberg.org/forgejo/forgejo/releases/download/v$version/forgejo-$version-$arch" > "$ofile"
+    chmod 755 "$ofile"
+    ln -sf "$ofile" "$install/forgejo"
+    systemctl restart forgejo.service
+fi