add tldr and base

src/prereqs.rs

@@ -0,0 +1,37 @@
+use clap::ArgMatches;
+
+const DEPS: &[&str] = &["gh", "fzf"];
+
+// -- List
+//
+
+pub fn ls() -> clap::Command {
+    clap::Command::new("ls")
+}
+
+pub fn ls_exec() -> eyre::Result<()> {
+    println!("Required packages\n---");
+
+    let mut deps: Vec<&str> = DEPS.into_iter().map(|d| d.clone()).collect();
+    deps.sort();
+    for dep in deps {
+        println!("{}", dep)
+    }
+    Ok(())
+}
+
+// -- Prereqs
+//
+
+pub fn prereqs() -> eyre::Result<clap::Command> {
+    let cmd = clap::Command::new("prereqs").subcommands([ls()]);
+
+    Ok(cmd)
+}
+
+pub fn prereqs_exec(matches: &ArgMatches) -> eyre::Result<()> {
+    match matches.subcommand() {
+        Some(("ls", _)) => ls_exec(),
+        _ => Err(eyre::anyhow!("not implemented")),
+    }
+}