Initial public release of Warp.

Repo-Sync-Origin: warpdotdev/warp-internal@12af1d983b

crates/lsp/src/command_builder.rs

@@ -0,0 +1,51 @@
+#[cfg(not(target_arch = "wasm32"))]
+use command::r#async::Command;
+
+/// A wrapper around `path_env_var` that produces correctly-configured commands.
+///
+/// This follows the same wrapping pattern as `command::r#async::Command`:
+/// callers construct commands through the executor, which transparently sets
+/// the PATH environment variable. On wasm, a dummy implementation is provided
+/// so that consumer code doesn't need cfg gating.
+#[derive(Clone)]
+pub struct CommandBuilder {
+    path_env_var: Option<String>,
+}
+
+impl CommandBuilder {
+    /// Creates a new CommandBuilder with the given PATH environment variable.
+    pub fn new(path_env_var: Option<String>) -> Self {
+        Self { path_env_var }
+    }
+
+    /// Returns the PATH environment variable, if set.
+    pub fn path_env_var(&self) -> Option<&str> {
+        self.path_env_var.as_deref()
+    }
+
+    /// Creates a new Command with PATH already set.
+    ///
+    /// Use this when you need to run a command. The returned Command has the
+    /// same API as `command::r#async::Command`, so callers don't need to change
+    /// how they construct commands.
+    ///
+    /// On Windows, the command is wrapped in `cmd.exe /c` so that `.cmd` and
+    /// `.bat` scripts on PATH are resolved correctly (e.g. `npm.cmd`,
+    /// `typescript-language-server.cmd`). Rust's `Command::new` uses
+    /// `CreateProcessW` which only resolves `.exe` extensions.
+    #[cfg(not(target_arch = "wasm32"))]
+    pub fn command(&self, program: impl AsRef<std::ffi::OsStr>) -> Command {
+        #[cfg(windows)]
+        let mut cmd = {
+            let mut cmd = Command::new("cmd.exe");
+            cmd.arg("/c").arg(program);
+            cmd
+        };
+        #[cfg(not(windows))]
+        let mut cmd = Command::new(program);
+        if let Some(path) = &self.path_env_var {
+            cmd.env("PATH", path);
+        }
+        cmd
+    }
+}