artifact: add path/binary/isInstalled static helpers

src/Package/Artifact/go_win.php

@@ -15,6 +15,23 @@
 
 class go_win
 {
+    /** GOROOT for the Windows Go toolchain. */
+    public static function path(): string
+    {
+        return PKG_ROOT_PATH . '/go-win';
+    }
+
+    /** Path to a binary inside go-win's bin/ (go.exe, gofmt.exe, …). */
+    public static function binary(string $name = 'go.exe'): string
+    {
+        return self::path() . '/bin/' . $name;
+    }
+
+    public static function isInstalled(): bool
+    {
+        return is_file(self::binary());
+    }
+
     #[CustomBinary('go-win', [
         'windows-x86_64',
     ])]

src/Package/Artifact/go_xcaddy.php

@@ -17,6 +17,23 @@
 
 class go_xcaddy
 {
+    /** GOROOT for the bundled Go toolchain used to build xcaddy. */
+    public static function path(): string
+    {
+        return PKG_ROOT_PATH . '/go-xcaddy';
+    }
+
+    /** Path to a binary inside go-xcaddy's bin/ (xcaddy, go, …). */
+    public static function binary(string $name = 'xcaddy'): string
+    {
+        return self::path() . '/bin/' . $name;
+    }
+
+    public static function isInstalled(): bool
+    {
+        return is_file(self::binary());
+    }
+
     #[CustomBinary('go-xcaddy', [
         'linux-x86_64',
         'linux-aarch64',

src/Package/Artifact/rust.php

@@ -16,6 +16,23 @@
 
 class rust
 {
+    /** Install prefix the rust tarball's install.sh writes into. */
+    public static function path(): string
+    {
+        return PKG_ROOT_PATH . '/rust';
+    }
+
+    /** Path to a binary inside the rust install dir (cargo, rustc, rustup, …). */
+    public static function binary(string $name = 'cargo'): string
+    {
+        return self::path() . '/bin/' . $name;
+    }
+
+    public static function isInstalled(): bool
+    {
+        return is_file(self::binary());
+    }
+
     #[CustomBinary('rust', [
         'linux-x86_64',
         'linux-aarch64',

src/Package/Artifact/zig.php

@@ -15,6 +15,23 @@
 
 class zig
 {
+    /** Directory zig extracts into. */
+    public static function path(): string
+    {
+        return PKG_ROOT_PATH . '/zig';
+    }
+
+    /** Path to a binary inside the zig install dir (zig, zig-cc, zig-c++, zig-ar, …). */
+    public static function binary(string $name = 'zig'): string
+    {
+        return self::path() . '/' . $name;
+    }
+
+    public static function isInstalled(): bool
+    {
+        return is_file(self::binary());
+    }
+
     #[CustomBinary('zig', [
         'linux-x86_64',
         'linux-aarch64',