first

code/backup_rsync_git.sh

@@ -0,0 +1,60 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+if [[ $# -gt 1 ]]; then
+  echo "Usage: $0 [path/to/.env]" >&2
+  exit 2
+fi
+
+ENV_FILE="${1:-$(dirname "$0")/.env}"
+if [[ ! -f "$ENV_FILE" ]]; then
+  echo "Env file not found: $ENV_FILE" >&2
+  exit 1
+fi
+
+# shellcheck disable=SC1090
+source "$ENV_FILE"
+
+required_vars=(
+  RSYNC_SOURCE
+  RSYNC_TARGET_DIR
+  GIT_REPO_DIR
+  COMMIT_MESSAGE_PREFIX
+)
+
+for var in "${required_vars[@]}"; do
+  if [[ -z "${!var:-}" ]]; then
+    echo "Missing required env var: $var" >&2
+    exit 1
+  fi
+done
+
+mkdir -p "$RSYNC_TARGET_DIR"
+
+repo_abs="$(cd "$GIT_REPO_DIR" && pwd)"
+target_abs="$(cd "$RSYNC_TARGET_DIR" && pwd)"
+
+case "$target_abs" in
+  "$repo_abs"/*) ;;
+  *)
+    echo "RSYNC_TARGET_DIR must be inside GIT_REPO_DIR" >&2
+    exit 1
+    ;;
+esac
+
+rel_target="${target_abs#"$repo_abs"/}"
+
+if [[ -n "${RSYNC_RSH:-}" ]]; then
+  rsync -az --delete -e "$RSYNC_RSH" "$RSYNC_SOURCE" "$RSYNC_TARGET_DIR/"
+else
+  rsync -az --delete "$RSYNC_SOURCE" "$RSYNC_TARGET_DIR/"
+fi
+
+git -C "$GIT_REPO_DIR" add -A -- "$rel_target"
+
+if git -C "$GIT_REPO_DIR" diff --cached --quiet -- "$rel_target"; then
+  exit 0
+fi
+
+timestamp="$(date '+%Y-%m-%d %H:%M:%S')"
+git -C "$GIT_REPO_DIR" commit -m "$COMMIT_MESSAGE_PREFIX $timestamp" -- "$rel_target"