[bug] Tauri does not support sidecar filenames with dots

[jffaust]

Describe the bug

When trying to use a sidecar with a filename that contains dots, Tauri will not handle it properly.

Additionally, if the sidecar's filename has a prefix that is the same as the name of the Tauri app, running npm run tauri dev will launch an endless number of app windows until you shut down the terminal or close the computer.

Reproduction

For an app called CoolApp, which produces an executable like CoolApp.exe

Working: "externalBin": ["binaries/bugrepro"]

NOT WORKING: "externalBin": ["binaries/bug.repro"]
Throws error Failed to spawn sidecar: Io(Os { code: 2, kind: NotFound, message: "The system cannot find the file specified." })

NOT WORKING: "externalBin": ["binaries/CoolApp.Server"]
Tauri launches the app endlessly until terminal closed or computer shut down

Expected behavior

Filenames with dots supported.

Full tauri info output

[✔] Environment
    - OS: Windows 10.0.22631 x86_64 (X64)
    ✔ WebView2: 131.0.2903.112
    ✔ MSVC: 
        - Visual Studio Build Tools 2022
        - Visual Studio Enterprise 2022
    ✔ rustc: 1.84.0 (9fc6b4312 2025-01-07)
    ✔ cargo: 1.84.0 (66221abde 2024-11-19)
    ✔ rustup: 1.27.1 (54dd3d00f 2024-04-24)
    ✔ Rust toolchain: stable-x86_64-pc-windows-msvc (default)
    - node: 20.10.0
    - pnpm: 9.12.3
    - npm: 10.2.3
    - deno: deno 2.1.5

[-] Packages
    - tauri 🦀: 2.2.0
    - tauri-build 🦀: 2.0.4
    - wry 🦀: 0.48.0
    - tao 🦀: 0.31.1
    - @tauri-apps/api : 2.2.0
    - @tauri-apps/cli : 2.2.3 (outdated, latest: 2.2.4)

[-] Plugins
    - tauri-plugin-opener 🦀: 2.2.3
    - @tauri-apps/plugin-opener : 2.2.3
    - tauri-plugin-websocket 🦀: 2.2.1
    - @tauri-apps/plugin-websocket : 2.2.1
    - tauri-plugin-shell 🦀: 2.2.0
    - @tauri-apps/plugin-shell : 2.2.0

[-] App
    - build-type: bundle
    - CSP: unset
    - frontendDist: ../build
    - devUrl: http://localhost:1420/
    - framework: Svelte
    - bundler: Vite

Stack trace

No response

Additional context

No response

[moritz-baecker-integra]

Thank you. This is extremly annoying. Would it be possible to at least print the path tauri is trying to start the application? Idk whats wrong but removing the dot in the filename fixed it.
Im pretty sure this worked with Tauri 1 but it does not anymore with Tauri V2