[bug] Info.plist modification in out dir causes Cargo to rebuild every time

[irh]

Describe the bug

On macOS, every time I run tauri dev Cargo has to rebuild the application even when no source files have been touched.

Running cargo build -v shows that the target/debug/build/[my-app]/out/Info.plist file has changed since the last build, requiring a rebuild of the app.

This happens with my 1.4-based app, but also on the latest dev with the helloworld example.

Reproduction

• On macOS, in the Tauri repo, run cargo run --example helloworld
• Close the app, and run cargo build --example -v
• Observe that Cargo classifies the Info.plist file as Dirty, causing a recompilation of the main app binary.

Expected behavior

If no source files have been touched, then it would be great if Cargo wouldn't have to recompile the app.

Platform and versions

[✔] Environment
    - OS: Mac OS 13.5.0 X64
    ✔ Xcode Command Line Tools: installed
    ✔ rustc: 1.71.0 (8ede3aae2 2023-07-12)
    ✔ Cargo: 1.71.0 (cfd3bbd8f 2023-06-08)
    ✔ rustup: 1.26.0 (5af9b9484 2023-04-05)
    ✔ Rust toolchain: stable-aarch64-apple-darwin (default)
    - node: 16.15.0
    - pnpm: 8.6.11
    - yarn: 1.22.19
    - npm: 8.10.0

[-] Packages
    - tauri [RUST]: 1.4.1
    - tauri-build [RUST]: 1.4.0
    - wry [RUST]: 0.24.3
    - tao [RUST]: 0.16.1
    - @tauri-apps/api [NPM]: 1.4.0
    - @tauri-apps/cli [NPM]: 1.4.0

[-] App
    - build-type: bundle
    - CSP: unset
    - distDir: ../build
    - devPath: http://localhost:5173/
    - framework: Svelte
    - bundler: Vite

Stack trace

No response

Additional context

No response

[olexiyb]

I tracked down to invalid logic in https://github.com/tauri-apps/tauri/blob/1a984a41e7207c616e03b8032431c21176af6379/core/tauri-codegen/src/context.rs

let format =
        time::format_description::parse("[year][month][day].[hour][minute][second]").unwrap();
      if let Ok(build_number) = time::OffsetDateTime::now_utc().format(&format) {
        plist.insert("CFBundleVersion".into(), build_number.into());
      }

According to https://developer.apple.com/documentation/bundleresources/information_property_list/cfbundleversion

This key is a machine-readable string composed of one to three period-separated integers, such as 10.14.1. The string can only contain numeric characters (0-9) and periods.
...
You can include more integers but the system ignores them.

I believe this field should just have the version from tauri.conf.json