cli: Improve `rad config`

radicle-cli/src/commands/config.rs

@@ -1,5 +1,6 @@
 #![allow(clippy::or_fun_call)]
 use std::ffi::OsString;
+use std::process;
 
 use anyhow::anyhow;
 
@@ -15,8 +16,12 @@ pub const HELP: Help = Help {
 Usage
 
     rad config [<option>...]
+    rad config show
+    rad config init
+    rad config edit
 
     If no argument is specified, prints the current radicle configuration as JSON.
+    To initialize a new configuration file, use `rad config init`.
 
 Options
 
@@ -25,13 +30,24 @@ Options
 "#,
 };
 
-pub struct Options {}
+#[derive(Default)]
+enum Operation {
+    #[default]
+    Show,
+    Init,
+    Edit,
+}
+
+pub struct Options {
+    op: Operation,
+}
 
 impl Args for Options {
     fn from_args(args: Vec<OsString>) -> anyhow::Result<(Self, Vec<OsString>)> {
         use lexopt::prelude::*;
 
         let mut parser = lexopt::Parser::from_args(args);
+        let mut op: Option<Operation> = None;
 
         #[allow(clippy::never_loop)]
         while let Some(arg) = parser.next()? {
@@ -39,20 +55,52 @@ impl Args for Options {
                 Long("help") | Short('h') => {
                     return Err(Error::Help.into());
                 }
+                Value(val) if op.is_none() => match val.to_string_lossy().as_ref() {
+                    "show" => op = Some(Operation::Show),
+                    "edit" => op = Some(Operation::Edit),
+                    "init" => op = Some(Operation::Init),
+                    unknown => anyhow::bail!("unknown operation '{unknown}'"),
+                },
                 _ => return Err(anyhow!(arg.unexpected())),
             }
         }
 
-        Ok((Options {}, vec![]))
+        Ok((
+            Options {
+                op: op.unwrap_or_default(),
+            },
+            vec![],
+        ))
     }
 }
 
-pub fn run(_options: Options, ctx: impl term::Context) -> anyhow::Result<()> {
+pub fn run(options: Options, ctx: impl term::Context) -> anyhow::Result<()> {
     let profile = ctx.profile()?;
     let path = profile.home.config();
-    let output = term::json::to_pretty(&profile.config, path.as_path())?;
 
-    output.print();
+    match options.op {
+        Operation::Show => {
+            term::json::to_pretty(&profile.config, path.as_path())?.print();
+        }
+        Operation::Init => {
+            if path.try_exists()? {
+                anyhow::bail!("configuration file already exists at `{}`", path.display());
+            }
+            profile.config.write(&path)?;
+        }
+        Operation::Edit => {
+            let Some(cmd) = term::editor::default_editor() else {
+                anyhow::bail!("no editor configured; please set the `EDITOR` environment variable");
+            };
+            process::Command::new(cmd)
+                .stdout(process::Stdio::inherit())
+                .stderr(process::Stdio::inherit())
+                .stdin(process::Stdio::inherit())
+                .arg(&path)
+                .spawn()?
+                .wait()?;
+        }
+    }
 
     Ok(())
 }

radicle-cli/src/commands/help.rs

@@ -16,6 +16,7 @@ const COMMANDS: &[Help] = &[
     rad_auth::HELP,
     rad_checkout::HELP,
     rad_clone::HELP,
+    rad_config::HELP,
     rad_fork::HELP,
     rad_help::HELP,
     rad_id::HELP,