move completion to dedicated module

src/cmd/completion.rs

@@ -0,0 +1,37 @@
+use crate::Cli;
+use clap::CommandFactory;
+use clap_complete::generate;
+use clap_complete::Shell::{Bash, Fish, Zsh};
+use std::path::Path;
+use std::{env, io};
+
+/// Generate shell completion
+#[derive(Debug, clap::Parser)]
+#[command(rename_all_env = "SNAKE_CASE")]
+pub struct GetCompletion {
+    /// The shell to generate completions for. Supported values are bash, zsh or fish
+    pub shell: String,
+}
+
+impl GetCompletion {
+    pub async fn run(self) -> anyhow::Result<()> {
+        let shell = self.shell;
+        let mut cmd = Cli::command();
+        let bin_name = env::args()
+            .next()
+            .and_then(|path| {
+                Path::new(&path)
+                    .file_stem()
+                    .map(|name| name.to_string_lossy().into_owned())
+            })
+            .unwrap();
+
+        match shell.as_str() {
+            "bash" => generate(Bash, &mut cmd, &bin_name, &mut io::stdout()),
+            "zsh" => generate(Zsh, &mut cmd, &bin_name, &mut io::stdout()),
+            "fish" => generate(Fish, &mut cmd, &bin_name, &mut io::stdout()),
+            _ => eprintln!("Unsupported shell: {}", shell),
+        }
+        Ok(())
+    }
+}

src/cmd/mod.rs

@@ -1,18 +1,11 @@
+mod completion;
 mod create;
 mod delete;
 mod inspect;
 mod list;
 mod token;
 
-use crate::Cli;
-use clap::CommandFactory;
-use clap_complete::{
-    generate,
-    shells::{Bash, Fish, Zsh},
-};
-use std::path::Path;
 use std::process::ExitCode;
-use std::{env, io};
 
 #[derive(Debug, clap::Subcommand)]
 pub enum Command {
@@ -21,7 +14,7 @@ pub enum Command {
     Token(token::GetToken),
     List(list::List),
     Inspect(inspect::Inspect),
-    Completion { shell: String },
+    Completion(completion::GetCompletion),
 }
 
 impl Command {
@@ -32,25 +25,7 @@ impl Command {
             Self::Token(cmd) => cmd.run().await,
             Self::List(cmd) => cmd.run().await,
             Self::Inspect(cmd) => cmd.run().await,
-            Self::Completion { shell } => {
-                let mut cmd = Cli::command();
-                let bin_name = env::args()
-                    .next()
-                    .and_then(|path| {
-                        Path::new(&path)
-                            .file_stem()
-                            .map(|name| name.to_string_lossy().into_owned())
-                    })
-                    .unwrap();
-
-                match shell.as_str() {
-                    "bash" => generate(Bash, &mut cmd, &bin_name, &mut io::stdout()),
-                    "zsh" => generate(Zsh, &mut cmd, &bin_name, &mut io::stdout()),
-                    "fish" => generate(Fish, &mut cmd, &bin_name, &mut io::stdout()),
-                    _ => eprintln!("Unsupported shell: {}", shell),
-                }
-                Ok(())
-            }
+            Self::Completion(cmd) => cmd.run().await,
         }
         .map(|()| ExitCode::SUCCESS)
     }