feat(shell): expand Command APIs (#526)

Co-authored-by: Amr Bashir <amr.bashir2015@gmail.com>

.changes/shell-command-apis.md

@@ -0,0 +1,5 @@
+---
+"shell": "patch"
+---
+
+Added `Command::arg`, `Command::env` and changed `Command::new` input type.

plugins/shell/src/lib.rs

@@ -13,6 +13,8 @@
 
 use std::{
     collections::HashMap,
+    ffi::OsStr,
+    path::Path,
     sync::{Arc, Mutex},
 };
 
@@ -45,7 +47,7 @@ pub struct Shell<R: Runtime> {
 
 impl<R: Runtime> Shell<R> {
     /// Creates a new Command for launching the given program.
-    pub fn command(&self, program: impl Into<String>) -> Command {
+    pub fn command(&self, program: impl AsRef<OsStr>) -> Command {
         Command::new(program)
     }
 
@@ -53,7 +55,7 @@ impl<R: Runtime> Shell<R> {
     ///
     /// A sidecar program is a embedded external binary in order to make your application work
     /// or to prevent users having to install additional dependencies (e.g. Node.js, Python, etc).
-    pub fn sidecar(&self, program: impl Into<String>) -> Result<Command> {
+    pub fn sidecar(&self, program: impl AsRef<Path>) -> Result<Command> {
         Command::new_sidecar(program)
     }
 

plugins/shell/src/process/mod.rs

@@ -3,9 +3,9 @@
 // SPDX-License-Identifier: MIT
 
 use std::{
-    collections::HashMap,
+    ffi::OsStr,
     io::{BufReader, Write},
-    path::PathBuf,
+    path::{Path, PathBuf},
     process::{Command as StdCommand, Stdio},
     sync::{Arc, RwLock},
     thread::spawn,
@@ -53,13 +53,7 @@ pub enum CommandEvent {
 
 /// The type to spawn commands.
 #[derive(Debug)]
-pub struct Command {
+pub struct Command(StdCommand);
-    program: String,
-    args: Vec<String>,
-    env_clear: bool,
-    env: HashMap<String, String>,
-    current_dir: Option<PathBuf>,
-}
 
 /// Spawned child process.
 #[derive(Debug)]
@@ -116,49 +110,44 @@ pub struct Output {
     pub stderr: Vec<u8>,
 }
 
-fn relative_command_path(command: String) -> crate::Result<String> {
+fn relative_command_path(command: &Path) -> crate::Result<PathBuf> {
     match platform::current_exe()?.parent() {
         #[cfg(windows)]
-        Some(exe_dir) => Ok(format!("{}\\{command}.exe", exe_dir.display())),
+        Some(exe_dir) => Ok(exe_dir.join(command).with_extension("exe")),
         #[cfg(not(windows))]
-        Some(exe_dir) => Ok(format!("{}/{command}", exe_dir.display())),
+        Some(exe_dir) => Ok(exe_dir.join(command)),
         None => Err(crate::Error::CurrentExeHasNoParent),
     }
 }
 
 impl From<Command> for StdCommand {
     fn from(cmd: Command) -> StdCommand {
-        let mut command = StdCommand::new(cmd.program);
+        cmd.0
-        command.args(cmd.args);
+    }
+}
+
+impl Command {
+    pub(crate) fn new<S: AsRef<OsStr>>(program: S) -> Self {
+        let mut command = StdCommand::new(program);
+
         command.stdout(Stdio::piped());
         command.stdin(Stdio::piped());
         command.stderr(Stdio::piped());
-        if cmd.env_clear {
-            command.env_clear();
-        }
-        command.envs(cmd.env);
-        if let Some(current_dir) = cmd.current_dir {
-            command.current_dir(current_dir);
-        }
         #[cfg(windows)]
         command.creation_flags(CREATE_NO_WINDOW);
-        command
+
+        Self(command)
     }
-}
 
-impl Command {
+    pub(crate) fn new_sidecar<S: AsRef<Path>>(program: S) -> crate::Result<Self> {
-    pub(crate) fn new<S: Into<String>>(program: S) -> Self {
+        Ok(Self::new(relative_command_path(program.as_ref())?))
-        Self {
-            program: program.into(),
-            args: Default::default(),
-            env_clear: false,
-            env: Default::default(),
-            current_dir: None,
-        }
     }
 
-    pub(crate) fn new_sidecar<S: Into<String>>(program: S) -> crate::Result<Self> {
+    /// Appends an argument to the command.
-        Ok(Self::new(relative_command_path(program.into())?))
+    #[must_use]
+    pub fn arg<S: AsRef<OsStr>>(mut self, arg: S) -> Self {
+        self.0.arg(arg);
+        self
     }
 
     /// Appends arguments to the command.
@@ -166,32 +155,46 @@ impl Command {
     pub fn args<I, S>(mut self, args: I) -> Self
     where
         I: IntoIterator<Item = S>,
-        S: AsRef<str>,
+        S: AsRef<OsStr>,
     {
-        for arg in args {
+        self.0.args(args);
-            self.args.push(arg.as_ref().to_string());
-        }
         self
     }
 
     /// Clears the entire environment map for the child process.
     #[must_use]
     pub fn env_clear(mut self) -> Self {
-        self.env_clear = true;
+        self.0.env_clear();
+        self
+    }
+
+    /// Inserts or updates an explicit environment variable mapping.
+    #[must_use]
+    pub fn env<K, V>(mut self, key: K, value: V) -> Self
+    where
+        K: AsRef<OsStr>,
+        V: AsRef<OsStr>,
+    {
+        self.0.env(key, value);
         self
     }
 
     /// Adds or updates multiple environment variable mappings.
     #[must_use]
-    pub fn envs(mut self, env: HashMap<String, String>) -> Self {
+    pub fn envs<I, K, V>(mut self, envs: I) -> Self
-        self.env = env;
+    where
+        I: IntoIterator<Item = (K, V)>,
+        K: AsRef<OsStr>,
+        V: AsRef<OsStr>,
+    {
+        self.0.envs(envs);
         self
     }
 
     /// Sets the working directory for the child process.
     #[must_use]
-    pub fn current_dir(mut self, current_dir: PathBuf) -> Self {
+    pub fn current_dir<P: AsRef<Path>>(mut self, current_dir: P) -> Self {
-        self.current_dir.replace(current_dir);
+        self.0.current_dir(current_dir);
         self
     }