[bug] readDir and createDir don't work in App Dir root level

[Janaka-Steph]

Describe the bug

fs.readDir and fs.createDir don't work in App Dir root level in 1.0.0-rc, but was working fine in beta.
Those methods work only on a sub-directory of the specified BaseDirectory.

Use case: Checking if App dir exists, creating it otherwise, and write a file in it.

async setItem(key: string, value: any) {
    if ('__TAURI__' in window) {
      try {
        await fs.readDir('', { dir: fs.Dir.App });
      } catch (err) {
        await fs.createDir('', { dir: fs.Dir.App, recursive: true });
      }
      await fs.writeFile(
          { path: getFileNameForKey(key), contents: JSON.stringify(value) },
          { dir: fs.Dir.App }
        )
    }
  }

Here readDir with throw with path not allowed on the configured scope: /Users/stephane/Library/Application Support/tdex-dashboard/, even though it is not a scope issue.

Calling writeFile without checking if app dir exists obviously results in No such file or directory (os error 2) error.

Instead or in addition to fixing readDir/createDir, writeFile could create folder if it doesn' exist.

https://discord.com/channels/616186924390023171/731495028677148753/948156122261495808

Reproduction

No response

Expected behavior

No response

Platform and versions

▶ cargo tauri info

Operating System - Mac OS, version 12.2.1 X64

Node.js environment
  Node.js - 16.14.0
  @tauri-apps/cli - 1.0.0-rc.5
  @tauri-apps/api - 1.0.0-rc.1

Global packages
  npm - 8.1.4
  pnpm - Not installed
  yarn - 1.22.17

Rust environment
  rustup - 1.24.3
  rustc - 1.58.1
  cargo - 1.58.0
  toolchain - stable-aarch64-apple-darwin 

App directory structure
/node_modules
/public
/scripts
/.github
/src-tauri
/build
/.git
/.idea
/src

App
  tauri - 1.0.0-rc.3
  tauri-build - 1.0.0-rc.3
  tao - 0.6.2
  wry - 0.13.2
  build-type - bundle
  CSP - default-src blob: data: filesystem: ws: wss: http: https: tauri: 'unsafe-eval' 'unsafe-inline' 'self' img-src: 'self'
  distDir - ../build
  devPath - http://localhost:3003/
  framework - React
  bundler - Webpack

Stack trace

No response

Additional context

No response

[lucasfernog]

It works if you set your FS scope to ["$APP", "$APP/*"] on the tauri configuration file.

[barbalex]

It works if you set your FS scope to ["$APP", "$APP/*"] on the tauri configuration file.

@lucasfernog 1. is that documented? 2. How is it done?

Asking because I ran into this after upgrading from beta version where it worked without.

[lucasfernog]

The scope was added in the RC versions as a result of the audit. We have the documentation here though it could be improved with this confusion here about reading files vs. directories.

[barbalex]

@lucasfernog Thanks a lot, sorry for not finding it.