add restic hook for gitea

roles/restic/files/hooks/gitea.sh

@@ -0,0 +1,49 @@
+#!/bin/bash
+
+set -e
+
+PATH="$PATH:/usr/local/bin:/usr/sbin:/sbin"
+
+GITEA_USER=${GITEA_USER:-git}
+GITEA_CONFIG=${GITEA_CONFIG:-/etc/gitea/app.ini}
+GITEA_WORK_PATH=${GITEA_WORK_PATH:-/var/lib/gitea}
+GITEA_CUSTOM_PATH=${GITEA_CUSTOM_PATH:-$GITEA_WORK_PATH/custom}
+GITEA_BACKUP_PATH=${GITEA_BACKUP_PATH:-$GITEA_WORK_PATH/backup}
+GITEA_KEEP_DAYS=${GITEA_KEEP_DAYS:-7}
+
+prereq() {
+    if ! systemctl list-units --full --all | grep -Fq "gitea.service"; then
+        printf "gitea.service unit does not exit\n"
+        exit 1
+    fi
+
+    if (( EUID != 0 )); then
+        printf "must be run as root\n"
+        exit 1
+    fi
+}
+
+main() {
+    prereq
+
+    if [ "$1" == "pre" ]; then
+        pushd "$GITEA_BACKUP_PATH" > /dev/null || printf "could not chdir to %s\n" "$GITEA_BACKUP_PATH"
+        printf "gitea dump started\n"
+        runuser -u "$GITEA_USER" -- \
+            gitea dump \
+            --config "$GITEA_CONFIG" \
+            --work-path "$GITEA_WORK_PATH" \
+            --custom-path "$GITEA_CUSTOM_PATH" > /dev/null
+        printf "gitea dump complete\n"
+        popd > /dev/null || printf "could not chdir to %s\n" "$OLDPWD"
+    elif [ "$1" == "post" ]; then
+        printf "purging gitea backups\n"
+        find "$GITEA_BACKUP_PATH" \
+            -type f \
+            -name '*.zip' \
+            -mtime "+$GITEA_KEEP_DAYS" \
+            -delete
+    fi
+}
+
+main "$@"