Added click exec and help menu

.gitignore

@@ -1 +1,2 @@
 /target
+.vscode

README.md

@@ -9,7 +9,7 @@ Make sure you have Rust installed first!
 - Run `cargo run --release install package` or `cargo run --release install package@version`
 
 **IMPORTANT ⚠️**
-In order for the symlinks to work you need to use the `--preserve-symlinks` flag when running `node myfile.js`. If development continues I'll make this easier so you don't have to do this extra step!
+In order for the symlinks to work you need to use the `--preserve-symlinks` flag when running `node myfile.js`. You can also use the command `click exec myfile.js`
 
 ## How fast?
 

src/cache.rs

@@ -2,7 +2,6 @@ use std::{
     collections::HashMap,
     fs::{self as fs_sync, File},
     io::{ErrorKind, Read, Seek, SeekFrom},
-    path::Path,
     str::FromStr,
 };
 

src/commands/command_handler.rs

@@ -7,6 +7,7 @@ use crate::errors::{
 };
 
 use super::install::InstallHandler;
+use super::exec::RunFileHandler;
 
 #[async_trait]
 pub trait CommandHandler {
@@ -20,14 +21,14 @@ pub async fn handle_args(mut args: Args) -> Result<(), ParseError> {
     let command = match args.next() {
         Some(command) => command,
         None => {
-            // TODO(conaticus): Implement help menu
-            println!("No help menu implemented yet.");
+            println!("Use: click <command> [options]\n  click install <package_name> [semver]\n  click exec <file name>");
             return Ok(());
         }
     };
 
     let mut command_handler: Box<dyn CommandHandler> = match command.to_lowercase().as_str() {
         "install" => Box::<InstallHandler>::default(),
+        "exec" => Box::<RunFileHandler>::default(),
         _ => return Err(CommandNotFound(command.to_string())),
     };
 

src/commands/exec.rs

@@ -0,0 +1,40 @@
+use crate::errors::{CommandError, ParseError};
+use async_trait::async_trait;
+use std::env::Args;
+use std::process::Command;
+use std::io;
+
+use super::command_handler::CommandHandler;
+
+#[derive(Default)]
+pub struct RunFileHandler {
+    file_name: String,
+}
+
+#[async_trait]
+impl CommandHandler for RunFileHandler {
+    fn parse(&mut self, args: &mut Args) -> Result<(), ParseError> {
+        let parsed_args = args
+            .next()
+            .ok_or(ParseError::MissingArgument(String::from("file name")))?;
+
+        self.file_name = parsed_args;
+
+        Ok(())
+    }
+    async fn execute(&self) -> Result<(), CommandError> {
+        let cmd = Command::new("node")
+            .args(["--preserve-symlinks", &self.file_name])
+            .status()
+            .map_err(CommandError::ComandFailedError)?;
+
+        if !(cmd.success()) {
+            let error_message = "Something went wrong";
+
+            let error = io::Error::new(io::ErrorKind::Other, error_message);
+            return Err(CommandError::ComandFailedError(error));
+        }
+
+        Ok(())
+    }
+}

src/commands/mod.rs

@@ -1,2 +1,3 @@
 pub mod command_handler;
 pub mod install;
+pub mod exec;

src/errors.rs

@@ -35,4 +35,6 @@ pub enum CommandError {
     FailedToWriteFile(Error),
     #[error("failed to serialize package lock ({0})")]
     FailedToSerializePackageLock(serde_json::Error),
+    #[error("command failed ({0})")]
+    ComandFailedError(Error)
 }