feat: add support for the 'list' command

src/cmd.rs

@@ -1,6 +1,7 @@
 pub mod build;
 pub mod default;
 pub mod install;
+pub mod list;
 pub mod releases;
 pub mod switch;
 pub mod update_links;

src/cmd/list.rs

@@ -0,0 +1,5 @@
+use crate::config;
+
+pub fn run(config: &config::Config) {
+    config::print_ids(config);
+}

src/config.rs

@@ -23,6 +23,20 @@ pub struct LanguageConfig {
     installs: toml::Table,
 }
 
+pub fn print_ids(config: &Config) {
+    println!("Erlang:");
+    config.erlang.as_ref().map(print_language_ids);
+    println!("");
+    println!("Gleam:");
+    config.gleam.as_ref().map(print_language_ids);
+}
+
+fn print_language_ids(lc: &LanguageConfig) {
+    for id in lc.installs.keys() {
+        println!("{id}")
+    }
+}
+
 fn get_language_config(language: &languages::Language, config: &Config) -> LanguageConfig {
     match language {
         languages::Language::Gleam => config.gleam.clone().unwrap_or_default(),

src/main.rs

@@ -212,10 +212,11 @@ fn handle_command(_bin_path: PathBuf) -> Result<(), Report> {
             println!("gleam");
             Ok(())
         }
-        // SubCommands::List => {
-        //     debug!("running list");
-        //     Ok(())
-        // }
+        SubCommands::List => {
+            debug!("running list");
+            cmd::list::run(&config);
+            Ok(())
+        }
         SubCommands::Releases(ReleasesArgs { language, .. }) => {
             debug!("running releases: repo={:?}", language);
             // TODO: should return Result type