feat: add init command

src/cli/init/mod.rs

@@ -0,0 +1,61 @@
+use std::{process::{Command, Stdio}, fs::File, path::PathBuf, io::Write};
+
+use structopt::StructOpt;
+
+use crate::{error::{Error, Result}, cargo};
+
+/// Build the Rust WASM app and all of its assets.
+#[derive(Clone, Debug, StructOpt)]
+#[structopt(name = "init")]
+pub struct Init {
+
+    /// Init project path
+    #[structopt(default_value = ".")]
+    path: String,
+
+    /// Template path
+    #[structopt(default_value = "default", long)]
+    template: String,
+
+}
+
+impl Init {
+    pub fn init(self) -> Result<()> {
+        
+        log::info!("🔧 Start to init a new project '{}'.", self.path);
+
+        let project_path = PathBuf::from(&self.path);
+
+        let output = Command::new("cargo")
+            .arg("init")
+            .arg(&self.path)
+            .arg("--bin")
+            .stdout(Stdio::piped())
+            .stderr(Stdio::piped())
+            .output()?
+        ;
+
+        if !output.status.success() {
+            return Err(Error::CargoError("Cargo init failed".into()));
+        }
+
+        // get the template code
+        let template_str = match self.template {
+            _ => include_str!("../../template/default.rs"),
+        };
+
+        let main_rs_file = project_path.join("src").join("main.rs");
+        if !main_rs_file.is_file() {
+            return Err(Error::FailedToWrite);
+        }
+
+        let mut file = File::create(main_rs_file)?;
+        file.write_all(&template_str.as_bytes())?;
+
+        // log::info!("🎯 Project initialization completed.");
+
+        
+
+        Ok(())
+    }
+}