feat: shell completions (#7)

Co-authored-by: GetPsyched <[email protected]>

Cargo.toml

@@ -8,6 +8,7 @@ edition = "2021"
 [dependencies]
 chrono = "0.4.38"
 clap = { version = "4.5.8", features = ["derive"] }
+clap_complete = "4.5.7"
 config = "0.14.0"
 dirs = "5.0.1"
 inquire = { version = "0.7.5", features = ["date"] }

src/bin/todo/completion.rs

@@ -0,0 +1,16 @@
+use std::io;
+
+use clap::{CommandFactory, Parser};
+use clap_complete::{generate, Shell};
+
+#[derive(Parser)]
+pub struct Args {
+    #[clap(value_enum, help = "The shell to generate the completion script for")]
+    pub shell: Shell,
+}
+
+pub fn command(args: &Args) {
+    let mut command = crate::Args::command();
+    let binary_name = command.get_name().to_string();
+    generate(args.shell, &mut command, binary_name, &mut io::stdout());
+}

src/bin/todo/main.rs

@@ -1,12 +1,14 @@
 use clap::{Parser, Subcommand};
 
+mod completion;
 mod create;
 mod delete;
 mod list;
 mod show;
 mod update;
 
 #[derive(Parser)]
+#[command(name = "todo")]
 struct Args {
     #[command(subcommand)]
     command: Commands,
@@ -24,6 +26,8 @@ enum Commands {
     Update(update::Args),
     /// Delete a task
     Delete(delete::Args),
+    /// Generate shell completion scripts
+    Completion(completion::Args),
 }
 
 fn main() {
@@ -35,5 +39,6 @@ fn main() {
         Commands::Show(args) => show::command(args),
         Commands::Update(args) => update::command(args),
         Commands::Delete(args) => delete::command(args),
+        Commands::Completion(args) => completion::command(args),
     }
 }