docs(sidecar): recommend rustc --print host-tuple for rust >= 1.84.0 (#3676)

Co-authored-by: Fabian-Lars <[email protected]>

Author: marshalhayes

src/content/docs/develop/sidecar.mdx

@@ -34,24 +34,27 @@ So `binaries/my-sidecar` would represent `<PROJECT ROOT>/src-tauri/binaries/my-s
 To make the external binary work on each supported architecture, a binary with the same name and a `-$TARGET_TRIPLE` suffix must exist on the specified path.
 For instance, `"externalBin": ["binaries/my-sidecar"]` requires a `src-tauri/binaries/my-sidecar-x86_64-unknown-linux-gnu` executable on Linux or `src-tauri/binaries/my-sidecar-aarch64-apple-darwin` on Mac OS with Apple Silicon.
 
-You can find your **current** platform's `-$TARGET_TRIPLE` suffix by looking at the `host:` property reported by the following command:
+You can find your **current** platform's `-$TARGET_TRIPLE` suffix by running the following command:
 
 ```sh
-rustc -Vv
+rustc --print host-tuple
 ```
 
-If the `grep` and `cut` commands are available, as they should on most Unix systems, you can extract the target triple directly with the following command:
+This directly outputs your host's target triple (e.g., `x86_64-unknown-linux-gnu` or `aarch64-apple-darwin`).
 
-```shell
-rustc -Vv | grep host | cut -f2 -d' '
-```
+:::note
+The `--print host-tuple` flag was added in Rust 1.84.0. If you're using an older version, you'll need to parse the output of `rustc -Vv` instead:
 
-On Windows you can use PowerShell instead:
+```sh
+# Unix (Linux/macOS)
+rustc -Vv | grep host | cut -f2 -d' '
 
-```powershell
+# Windows PowerShell
 rustc -Vv | Select-String "host:" | ForEach-Object {$_.Line.split(" ")[1]}
 ```
 
+:::
+
 Here's a Node.js script to append the target triple to a binary:
 
 ```javascript
@@ -60,8 +63,7 @@ import fs from 'fs';
 
 const extension = process.platform === 'win32' ? '.exe' : '';
 
-const rustInfo = execSync('rustc -vV');
-const targetTriple = /host: (\S+)/g.exec(rustInfo)[1];
+const targetTriple = execSync('rustc --print host-tuple').toString().trim();
 if (!targetTriple) {
   console.error('Failed to determine platform target triple');
 }

src/content/docs/learn/sidecar-nodejs.mdx

@@ -123,8 +123,7 @@ Without the plugin being initialized and configured the example won't work.
 
     const ext = process.platform === 'win32' ? '.exe' : '';
 
-    const rustInfo = execSync('rustc -vV');
-    const targetTriple = /host: (\S+)/g.exec(rustInfo)[1];
+    const targetTriple = execSync('rustc --print host-tuple').toString().trim();
     if (!targetTriple) {
       console.error('Failed to determine platform target triple');
     }
@@ -135,6 +134,16 @@ Without the plugin being initialized and configured the example won't work.
     );
     ```
 
+    :::note
+    The `--print host-tuple` flag was added in Rust 1.84.0. If you're using an older version, you'll need to parse the output of `rustc -Vv` instead:
+
+    ```js
+    const rustInfo = execSync('rustc -vV');
+    const targetTriple = /host: (\S+)/g.exec(rustInfo)[1];
+    ```
+
+    :::
+
     And run `node rename.js` from the `sidecar-app` directory.
 
     At this step the `/src-tauri/binaries` directory should contain the renamed sidecar binary.