feat: add shell completions

Cargo.lock

@@ -284,6 +284,47 @@ dependencies = [
  "strsim",
 ]
 
+[[package]]
+name = "clap_complete"
+version = "4.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "586a385f7ef2f8b4d86bddaa0c094794e7ccbfe5ffef1f434fe928143fc783a5"
+dependencies = [
+ "clap",
+]
+
+[[package]]
+name = "clap_complete_command"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "183495371ea78d4c9ff638bfc6497d46fed2396e4f9c50aebc1278a4a9919a3d"
+dependencies = [
+ "clap",
+ "clap_complete",
+ "clap_complete_fig",
+ "clap_complete_nushell",
+]
+
+[[package]]
+name = "clap_complete_fig"
+version = "4.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9e9bae21b3f6eb417ad3054c8b1094aa0542116eba4979b1b271baefbfa6b965"
+dependencies = [
+ "clap",
+ "clap_complete",
+]
+
+[[package]]
+name = "clap_complete_nushell"
+version = "0.1.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5d02bc8b1a18ee47c4d2eec3fb5ac034dc68ebea6125b1509e9ccdffcddce66e"
+dependencies = [
+ "clap",
+ "clap_complete",
+]
+
 [[package]]
 name = "clap_derive"
 version = "4.3.2"
@@ -1123,6 +1164,7 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "clap",
+ "clap_complete_command",
  "humantime",
  "libc",
  "notify-rust",

Cargo.toml

@@ -8,6 +8,7 @@ edition = "2021"
 [dependencies]
 anyhow = "1.0.71"
 clap = { version = "4.3.4", features = ["derive"] }
+clap_complete_command = "0.5.1"
 humantime = "2.1.0"
 libc = "0.2.147"
 notify-rust = "4.8.0"

flake.nix

@@ -14,7 +14,14 @@
       {
         packages.default = naersk-lib.buildPackage {
           src = ./.;
+          nativeBuildInputs = with pkgs; [ installShellFiles ];
           meta.mainProgram = "timers";
+          postInstall = ''
+            installShellCompletion --cmd timers \
+              --bash <($out/bin/timers completions bash) \
+              --fish <($out/bin/timers completions fish) \
+              --zsh <($out/bin/timers completions zsh) \
+          '';
         };
         devShells.default = with pkgs; mkShell {
           buildInputs = [ cargo rustc rustfmt pre-commit rustPackages.clippy rust-analyzer ];

src/cli.rs

@@ -1,5 +1,5 @@
 use crate::daemon::{Answer, AnswerErr, Command as OtherCommand};
-use crate::run_path;
+use crate::helper::run_path;
 use anyhow::{Context, Result};
 use clap::{Parser, Subcommand};
 use std::net::Shutdown;
@@ -56,6 +56,12 @@ pub enum Command {
     #[command(subcommand)]
     #[clap(visible_alias = "p")]
     Pomodoro(PomodoroCommand),
+
+    /// Shell completions
+    Completions {
+        #[arg(value_enum)]
+        shell: clap_complete_command::Shell,
+    }
 }
 
 #[derive(Debug, Subcommand)]

src/main.rs

@@ -7,14 +7,17 @@ mod timer;
 
 use crate::cli::{send_command, Cli, Command as CliCommand};
 use crate::daemon::{Command as DaemonCommand, Daemon};
-use crate::helper::run_path;
+use clap::CommandFactory;
 use clap::Parser;
 use cli::PomodoroCommand;
 
 fn main() -> Result<(), anyhow::Error> {
     let args = Cli::parse();
     let daemon_command = match args.command {
-        CliCommand::Daemon { no_notify, pid_file } => {
+        CliCommand::Daemon {
+            no_notify,
+            pid_file,
+        } => {
             return Daemon::new(args.socket, pid_file, no_notify)?.run();
         }
         CliCommand::Add { name, duration } => {
@@ -39,6 +42,10 @@ fn main() -> Result<(), anyhow::Error> {
             PomodoroCommand::List => DaemonCommand::PomodoroList,
             PomodoroCommand::Toggle => DaemonCommand::PomodoroToggle,
         },
+        CliCommand::Completions { shell } => {
+            shell.generate(&mut Cli::command(), &mut std::io::stdout());
+            return Ok(());
+        }
     };
     let answer = send_command(&args.socket, daemon_command)?;
     print!("{}", answer);