Merge pull request #16 from Start9Labs/feat/rsync-backups

adds backup utilities

backups.ts

@@ -0,0 +1,98 @@
+import { ok } from "./util.ts";
+import * as T from "./types.ts";
+
+/** 
+ * This utility simplifies the volume backup process.
+ * ```ts
+ * export const { createBackup, restoreBackup } = Backups.volumes("main").build();
+ * ```
+*/
+export class Backups {
+  static BACKUP = "BACKUP" as const;
+  public backupSet = [] as {
+    srcPath: string;
+    srcVolume: string;
+    dstPath: string;
+    dstVolume: string;
+  }[];
+  constructor() {
+  }
+  static volumes(...volumeNames: string[]) {
+    return new Backups().addSets(...volumeNames.map((srcVolume) => ({
+      srcVolume,
+      srcPath: "./",
+      dstPath: `./${srcVolume}/`,
+      dstVolume: Backups.BACKUP,
+    })));
+  }
+  static addSets(
+    ...options: {
+      srcPath: string;
+      srcVolume: string;
+      dstPath: string;
+      dstVolume: string;
+    }[]
+  ) {
+    return new Backups().addSets(...options);
+  }
+  addSets(
+    ...options: {
+      srcPath: string;
+      srcVolume: string;
+      dstPath: string;
+      dstVolume: string;
+    }[]
+  ) {
+    options.forEach((x) => this.backupSet.push(x));
+    return this;
+  }
+  build() {
+    const createBackup: T.ExpectedExports.createBackup = async (effects) => {
+      for (const item of this.backupSet) {
+        if (notEmptyPath(item.dstPath)) {
+          await effects.createDir({
+            volumeId: item.dstVolume,
+            path: item.dstPath,
+          });
+        }
+        await effects.runRsync({
+          ...item,
+          options: {
+            delete: true,
+            force: true,
+            ignoreExisting: false,
+            exclude: [],
+          },
+        }).wait();
+      }
+      return ok;
+    };
+    const restoreBackup: T.ExpectedExports.restoreBackup = async (effects) => {
+      for (const item of this.backupSet) {
+        if (notEmptyPath(item.srcPath)) {
+          await effects.createDir({
+            volumeId: item.srcVolume,
+            path: item.srcPath,
+          });
+        }
+        await effects.runRsync({
+          options: {
+            delete: true,
+            force: true,
+            ignoreExisting: false,
+            exclude: [],
+          },
+          srcVolume: item.dstVolume,
+          dstVolume: item.srcVolume,
+          srcPath: item.dstPath,
+          dstPath: item.srcPath,
+        }).wait();
+      }
+      return ok;
+    };
+    return { createBackup, restoreBackup };
+  }
+}
+function notEmptyPath(file: string) {
+  return ["", ".", "./"].indexOf(file) === -1;
+}

mod.ts

@@ -4,3 +4,4 @@ export * as compat from "./compat/mod.ts";
 export * as migrations from "./migrations.ts";
 export * as healthUtil from "./healthUtil.ts";
 export * as util from "./util.ts";
+export { Backups } from "./backups.ts";

types.ts

@@ -6,6 +6,10 @@ export namespace ExpectedExports {
   export type getConfig = (effects: Effects) => Promise<ResultType<ConfigRes>>;
   /** These are how we make sure the our dependency configurations are valid and if not how to fix them. */
   export type dependencies = Dependencies;
+  /** For backing up service data though the embassyOS UI */
+  export type createBackup = (effects: Effects) => Promise<ResultType<unknown>>;
+  /** For restoring service data that was previously backed up using the embassyOS UI create backup flow. Backup restores are also triggered via the embassyOS UI, or doing a system restore flow during setup. */
+  export type restoreBackup = (effects: Effects) => Promise<ResultType<unknown>>;
   /**  Properties are used to get values from the docker, like a username + password, what ports we are hosting from */
   export type properties = (effects: Effects) => Promise<ResultType<Properties>>;
 
@@ -85,6 +89,20 @@ export type Effects = {
     /// Returns the body as a json
     json(): Promise<unknown>;
   }>;
+
+  runRsync(options: {
+    srcVolume: string,
+    dstVolume: string,
+    srcPath: string,
+    dstPath: string,
+    // rsync options: https://linux.die.net/man/1/rsync
+    options: {
+      delete: boolean,
+      force: boolean,
+      ignoreExisting: boolean,
+      exclude: string[]
+    }
+  }): {id: () => Promise<string>, wait: () => Promise<null>, progress: () => Promise<number>}
 };
 export type Metadata = {
   fileType: string;