feat: add ConfigPath subcommand to output config path

Co-authored-by: aider (openai/gpt-5) <aider@aider.chat>

src/main.rs

@@ -1,5 +1,5 @@
 use anyhow::{Context, Result};
-use clap::Parser;
+use clap::{Parser, Subcommand};
 use serde::Deserialize;
 use std::collections::HashMap;
 use std::fs;
@@ -20,16 +20,26 @@ struct AppConfig {
     profiles: HashMap<String, Settings>,
 }
 
+#[derive(Subcommand, Debug)]
+enum Commands {
+    /// Show the path to the configuration file and exit
+    ConfigPath,
+}
+
 #[derive(Parser, Debug)]
 #[command(author, version, about, long_about = None)]
 struct Args {
     /// The URL of the video/music to download
     #[arg(name = "URL")]
-    url: String,
+    url: Option<String>,
 
     /// Profile name to use from config (falls back to 'default')
     #[arg(short, long, default_value = "default")]
     profile: String,
+
+    /// Command to run
+    #[command(subcommand)]
+    cmd: Option<Commands>,
 }
 
 fn main() -> Result<()> {
@@ -41,6 +51,12 @@ fn main() -> Result<()> {
         .join("jamdl");
     let config_path = config_dir.join("config.toml");
 
+    // Handle 'config-path' subcommand early without creating or reading config
+    if matches!(args.cmd, Some(Commands::ConfigPath)) {
+        println!("{}", config_path.display());
+        return Ok(());
+    }
+
     if !config_path.exists() {
         println!("[INFO] No config file found, creating a default one...");
         fs::create_dir_all(&config_dir).context("Failed to create config directory")?;
@@ -98,7 +114,8 @@ fn main() -> Result<()> {
         temp_path.display()
     );
 
-    download_media(&args.url, temp_path, &settings)?;
+    let url = args.url.clone().context("A URL is required when not using a subcommand. Use '--help' for usage.")?;
+    download_media(&url, temp_path, &settings)?;
     transfer_files(temp_path, &settings)?;
 
     // Cleanup is handled by TempDir's Drop trait