add completions

CHANGELOG.md

@@ -8,6 +8,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 <!-- next-header -->
 
 ## [Unreleased]
+### CLI
+- added completions
+
+### Other
 - Added README
 
 ## [0.1.0] - 2022-02-13

src/cli/parse.rs

@@ -1,4 +1,5 @@
 use clap::Parser;
+use clap_complete::Shell;
 
 #[derive(Parser, Debug)]
 #[clap(name = "discordrpc")]
@@ -118,4 +119,7 @@ pub struct Cli {
         display_order = 12
     )]
     pub enable_time: bool,
+
+    #[clap(long = "print-completions", value_name = "shell", arg_enum, display_order = 13)]
+    pub print_completions: Option<Shell>,
 }

src/main.rs

@@ -1,6 +1,7 @@
 mod cli;
 
-use clap::StructOpt;
+use clap::{StructOpt, IntoApp};
+use clap_complete::generate;
 use colored::Colorize;
 use discord_rich_presence::{
     activity::{self, Activity},
@@ -10,7 +11,7 @@ use std::{
     process::exit,
     thread::sleep,
     time::{Duration, SystemTime, UNIX_EPOCH},
-    vec,
+    vec, io,
 };
 
 use crate::cli::Cli;
@@ -26,6 +27,14 @@ fn main() {
 
     let args = Cli::parse();
 
+    if let Some(shell) = args.print_completions {
+        let mut clap_app = Cli::into_app();
+        let app_name = clap_app.get_name().to_string();
+
+        generate(shell, &mut clap_app, app_name, &mut io::stdout());
+        exit(0)
+    }
+
     let state = args.state;
     let details = args.details;
     let large_image = args.large_image;