cli/unfollow: Use clap

crates/radicle-cli/src/commands/help.rs

@@ -67,7 +67,10 @@ const COMMANDS: &[CommandItem] = &[
     CommandItem::Lexopt(crate::commands::seed::HELP),
     CommandItem::Lexopt(crate::commands::follow::HELP),
     CommandItem::Lexopt(crate::commands::unblock::HELP),
-    CommandItem::Lexopt(crate::commands::unfollow::HELP),
+    CommandItem::Clap {
+        name: "unfollow",
+        about: crate::commands::unfollow::ABOUT,
+    },
     CommandItem::Clap {
         name: "unseed",
         about: crate::commands::unseed::ABOUT,

crates/radicle-cli/src/commands/unfollow.rs

@@ -1,77 +1,13 @@
-use std::ffi::OsString;
+mod args;
 
-use anyhow::anyhow;
-
-use radicle::node::{Handle, NodeId};
+use radicle::node::Handle;
 
 use crate::terminal as term;
-use crate::terminal::args::{Args, Error, Help};
 
-pub const HELP: Help = Help {
-    name: "unfollow",
-    description: "Unfollow a peer",
-    version: env!("RADICLE_VERSION"),
-    usage: r#"
-Usage
+pub use args::Args;
+pub(crate) use args::ABOUT;
 
-    rad unfollow <nid> [<option>...]
-
-    The `unfollow` command takes a Node ID (<nid>), optionally in DID format,
-    and removes the follow policy for that peer.
-
-Options
-
-    --verbose, -v          Verbose output
-    --help                 Print help
-"#,
-};
-
-#[derive(Debug)]
-pub struct Options {
-    pub nid: NodeId,
-    pub verbose: bool,
-}
-
-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 nid: Option<NodeId> = None;
-        let mut verbose = false;
-
-        while let Some(arg) = parser.next()? {
-            match &arg {
-                Value(val) if nid.is_none() => {
-                    if let Ok(did) = term::args::did(val) {
-                        nid = Some(did.into());
-                    } else if let Ok(val) = term::args::nid(val) {
-                        nid = Some(val);
-                    } else {
-                        anyhow::bail!("invalid Node ID `{}` specified", val.to_string_lossy());
-                    }
-                }
-                Long("verbose") | Short('v') => verbose = true,
-                Long("help") | Short('h') => {
-                    return Err(Error::Help.into());
-                }
-                _ => {
-                    return Err(anyhow!(arg.unexpected()));
-                }
-            }
-        }
-
-        Ok((
-            Options {
-                nid: nid.ok_or_else(|| anyhow!("a Node ID must be specified"))?,
-                verbose,
-            },
-            vec![],
-        ))
-    }
-}
-
-pub fn run(options: Options, ctx: impl term::Context) -> anyhow::Result<()> {
+pub fn run(options: Args, ctx: impl term::Context) -> anyhow::Result<()> {
     let profile = ctx.profile()?;
     let mut node = radicle::Node::new(profile.socket());
     let nid = options.nid;

crates/radicle-cli/src/commands/unfollow/args.rs

@@ -0,0 +1,39 @@
+use clap::Parser;
+
+use thiserror::Error;
+
+use radicle::node::NodeId;
+use radicle::prelude::Did;
+
+pub(crate) const ABOUT: &str = "Unfollow a peer";
+
+const LONG_ABOUT: &str = r#"
+The `unfollow` command takes a Node ID, optionally in DID format,
+and removes the follow policy for that peer."#;
+
+#[derive(Debug, Error)]
+#[error("invalid Node ID specified (Node ID parsing failed with: '{nid}', DID parsing failed with: '{did}'))")]
+struct NodeIdParseError {
+    did: radicle::identity::did::DidError,
+    nid: radicle::crypto::PublicKeyError,
+}
+
+fn parse_nid(value: &str) -> Result<NodeId, NodeIdParseError> {
+    value.parse::<Did>().map(NodeId::from).or_else(|did| {
+        value
+            .parse::<NodeId>()
+            .map_err(|nid| NodeIdParseError { nid, did })
+    })
+}
+
+#[derive(Debug, Parser)]
+#[command(about = ABOUT, long_about = LONG_ABOUT, disable_version_flag = true)]
+pub struct Args {
+    /// Node ID (optionally in DID format) of the peer to unfollow
+    #[arg(value_name = "NID", value_parser = parse_nid)]
+    pub(super) nid: NodeId,
+
+    /// Verbose output
+    #[arg(short, long)]
+    pub(super) verbose: bool,
+}

crates/radicle-cli/src/main.rs

@@ -49,6 +49,7 @@ enum Commands {
     Issue(issue::Args),
     Path(path::Args),
     Stats(stats::Args),
+    Unfollow(unfollow::Args),
     Unseed(unseed::Args),
 }
 
@@ -278,11 +279,9 @@ pub(crate) fn run_other(exe: &str, args: &[OsString]) -> Result<(), Option<anyho
             );
         }
         "unfollow" => {
-            term::run_command_args::<unfollow::Options, _>(
-                unfollow::HELP,
-                unfollow::run,
-                args.to_vec(),
-            );
+            if let Some(Commands::Unfollow(args)) = CliArgs::parse().command {
+                term::run_command_fn(unfollow::run, args);
+            }
         }
         "unseed" => {
             if let Some(Commands::Unseed(args)) = CliArgs::parse().command {