Added systemd services for backups

home-server/systemd/recurring-tasks/homeassistant-backup/index.ts

@@ -0,0 +1,86 @@
+import { $ } from "bun";
+import moment from "moment";
+import logger from "pino";
+import { parseArgs } from "util";
+
+const { values } = parseArgs({
+  args: Bun.argv,
+  options: {
+    mode: {
+      type: "string",
+      required: true,
+    },
+    sourceFolder: {
+      type: "string",
+      required: true,
+    },
+    targetFolder: {
+      type: "string",
+      required: true,
+    },
+    backupName: {
+      type: "string",
+      required: true,
+    },
+  },
+  strict: true,
+  allowPositionals: true,
+});
+const log = logger();
+
+switch (values.mode) {
+  case "hot":
+    await hotCopy(
+      values.sourceFolder!,
+      values.targetFolder!,
+      values.backupName!,
+    );
+    break;
+  case "cold":
+    await coldCopy(
+      values.sourceFolder!,
+      values.targetFolder!,
+      values.backupName!,
+    );
+    break;
+}
+
+// 3 cold copies are stored
+async function hotCopy(
+  sourceFolder: string,
+  targetFolder: string,
+  backupName: string,
+) {
+  const timestamp = moment().format("YYYY-MM-DD_HH-mm-ss"); // Return today's date time
+
+  log.info("Creating new copy");
+  await $`mkdir -p ${targetFolder}`;
+  // Sync new copy
+  await $`rsync -a ${sourceFolder} ${targetFolder}/backup_${backupName}_${timestamp}`;
+
+  log.info("Only keep last 3 copies");
+  // Only keep last 3 copies
+  await $`cd ${targetFolder} && ls | grep ${backupName} | sort -r | tail -n +4 | xargs rm -rf`;
+}
+
+// Only 1 cold copy is retained
+async function coldCopy(
+  sourceFolder: string,
+  targetFolder: string,
+  backupName: string,
+) {
+  const timestamp = moment().format("YYYY-MM-DD_HH-mm-ss"); // Return today's date time
+
+  log.info("Creating new copy");
+
+  // find latest backup
+  const sourceFolderToBackup =
+    await $`cd ${sourceFolder} && ls | grep ${backupName} | sort | tail -n 1`.text().then(resp => resp.replace('\n',''));
+  log.info(`Folder to back up: ${sourceFolderToBackup}`);
+  await $`mkdir -p ${targetFolder}`;
+  await $`zip -r ${targetFolder}/${backupName}_${timestamp}.zip ${sourceFolder}/${sourceFolderToBackup}`;
+
+  log.info("Only keep last copy");
+  // Only keep last copy
+  await $`cd ${targetFolder} && ls | grep ${backupName} | sort -r | tail -n +2 | xargs rm -rf`;
+}