hive-forge: rewrite bash CLI helper as a rust binary (closes #280)

hive-forge/src/verbs/comment_show.rs

@@ -0,0 +1,40 @@
+//! `comment-show <id> [--json] [repo]` — print the body (or full
+//! JSON) of a single comment by id.
+
+use anyhow::Result;
+use clap::Args as ClapArgs;
+use serde_json::{Value, json};
+
+use crate::client::Client;
+use crate::verbs::print_json;
+
+#[derive(ClapArgs)]
+pub struct Args {
+    /// Comment id.
+    id: u64,
+    /// Print full JSON envelope instead of just the body text.
+    #[arg(long)]
+    json: bool,
+    /// Repo override.
+    repo: Option<String>,
+}
+
+pub fn run(client: &Client, args: Args) -> Result<()> {
+    let repo = client.repo(args.repo.as_deref());
+    let v = client.get_json(&format!("/repos/{repo}/issues/comments/{}", args.id))?;
+    if args.json {
+        let trimmed = json!({
+            "id": v.get("id"),
+            "user": v.get("user").and_then(|u| u.get("login")),
+            "created_at": v.get("created_at"),
+            "updated_at": v.get("updated_at"),
+            "body": v.get("body"),
+            "url": v.get("html_url"),
+        });
+        print_json(&trimmed)
+    } else {
+        let body = v.get("body").and_then(Value::as_str).unwrap_or("");
+        println!("{body}");
+        Ok(())
+    }
+}