[bug] Allow the use of `target` dir inside frontendDist/distDir

[jdalegonzalez]

Describe the bug

If you define a path in your app like http://localhost:3000/target, you'll get a folder in your ./out directory called ./out/target that includes the resources for that path. The tauri build sees this folder and generates a build error
"The configured distDir includes the ["target"] folder. Please isolate your web assets on a separate folder and update tauri.conf.json > build > distDir." Renaming the path to something else fixes the problem but that sucks if you really want the name of the path to be target.

Reproduction

Create a next-js app and add a src/pages/target/index.ts
run npm tauri build
See failure.

Expected behavior

The builder shouldn't care about the name of the paths in the out folder

Full tauri info output

[✔] Environment
    - OS: Windows 10.0.26100 X64
    ✔ WebView2: 135.0.3179.85
    ✔ MSVC: Visual Studio Build Tools 2022
    ✔ rustc: 1.86.0 (05f9846f8 2025-03-31)
    ✔ cargo: 1.86.0 (adf9b6ad1 2025-02-28)
    ✔ rustup: 1.28.1 (f9edccde0 2025-03-05)
    ✔ Rust toolchain: stable-x86_64-pc-windows-msvc (default)
    - node: 22.14.0
    - pnpm: 10.9.0
    - npm: 11.1.0

[-] Packages
    - tauri [RUST]: 1.8.2
    - tauri-build [RUST]: 1.5.6
    - wry [RUST]: 0.24.11
    - tao [RUST]: 0.16.10
    - @tauri-apps/api : not installed!
    - @tauri-apps/cli [NPM]: 1.6.3 (outdated, latest: 2.5.0)

[-] App
    - build-type: bundle
    - CSP: unset
    - distDir: ../out
    - devPath: http://localhost:3000/
    - framework: React (Next.js)
    - bundler: Webpack

Stack trace

Additional context

No response

[FabianLars]

we can't simply "fix" this (the check is intentional and needed) but a config / env var / cli flag or whatever could be added

[jdalegonzalez]

Thanks for the feedback @FabianLars . Perhaps the check could look at the contents of the folder? Perhaps the check could examine the out directory or the source directory and recognize where these "target" folders were actually coming from? Perhaps the error message could be made a little more clear? Maybe note that the developer may have a real route named target that needs renaming?

[FabianLars]

Ah true true, checking if it's a rust target dir should be quite easy

[jdalegonzalez]

@FabianLars Wonderful! All of the people out there writing archery apps will appreciate it. 😄