rust skeleton

rust/rox/src/cli.rs

@@ -0,0 +1,29 @@
+//! Cli interface.
+
+use std::path::PathBuf;
+
+use clap::{Args, Parser, Subcommand};
+
+/// Interpreter for the Lox language.
+#[derive(Parser)]
+#[command(version, about, long_about = None)]
+#[command(propagate_version = true)]
+pub struct Cli {
+    #[command(subcommand)]
+    pub command: Commands,
+}
+
+#[derive(Args, Clone)]
+pub struct CompileConfig {
+    /// Path to Lox source file.
+    #[arg(short, long)]
+    pub source: PathBuf,
+}
+
+#[derive(Subcommand)]
+pub enum Commands {
+    /// Compile a Lox source file.
+    Compile(CompileConfig),
+    /// Run a Lox REPL.
+    Repl,
+}

rust/rox/src/lib.rs

@@ -0,0 +1,6 @@
+use std::path::Path;
+
+pub mod cli;
+
+pub fn compile(source: &Path) {}
+pub fn repl() {}

rust/rox/src/main.rs

@@ -0,0 +1,20 @@
+use clap::Parser;
+use rox::cli::{Cli, Commands};
+
+fn main() {
+    if std::env::var_os("RUST_LOG").is_none() {
+        std::env::set_var("RUST_LOG", "info");
+    }
+    tracing_subscriber::fmt::init();
+
+    let cli = Cli::parse();
+
+    match &cli.command {
+        Commands::Compile(compile_config) => {
+            rox::compile(&compile_config.source);
+        }
+        Commands::Repl => {
+            rox::repl();
+        }
+    }
+}