feat: Support showing a profile

src/cmd/profile/mod.rs

@@ -1,11 +1,15 @@
 mod list;
+mod show;
 
 use anyhow::Result;
 use clap::{Parser, Subcommand};
 
 #[derive(Debug, Subcommand)]
 pub enum Action {
+    /// Lists all configured profiles.
     List(list::Cmd),
+    /// Shows a profile in TOML format.
+    Show(show::Cmd),
 }
 
 #[derive(Debug, Parser)]
@@ -19,6 +23,7 @@ impl Cmd {
         use Action::*;
         match self.action {
             List(cmd) => cmd.run(),
+            Show(cmd) => cmd.run(),
         }
     }
 }

src/cmd/profile/show.rs

@@ -0,0 +1,24 @@
+use anyhow::{anyhow, Result};
+use clap::Parser;
+
+use crate::config::Config;
+
+#[derive(Debug, Parser)]
+pub struct Cmd {
+    // Name of the profile to show.
+    name: String,
+}
+
+impl Cmd {
+    pub fn run(self) -> Result<()> {
+        let config = Config::load()?;
+        let profile = config
+            .profiles
+            .get(&self.name)
+            .ok_or_else(|| anyhow!("Unknown profile: {}", &self.name))?;
+
+        print!("{}", toml::to_string(profile)?);
+
+        Ok(())
+    }
+}

src/profile.rs

@@ -4,17 +4,17 @@ use std::ops::Deref;
 use crate::rule::ProfileRef;
 use anyhow::Result;
 use git2::Config;
-use serde::Deserialize;
+use serde::{Deserialize, Serialize};
 
-#[derive(Debug, Default, Deserialize)]
+#[derive(Debug, Default, Deserialize, Serialize)]
 pub struct User {
     #[serde(default)]
     pub name: Option<String>,
     #[serde(default)]
     pub email: Option<String>,
 }
 
-#[derive(Debug, Default, Deserialize)]
+#[derive(Debug, Default, Deserialize, Serialize)]
 pub struct Profile {
     #[serde(default)]
     pub user: Option<User>,