feat(cli): add shell completion

Cargo.toml

@@ -32,6 +32,7 @@ zstd = "0.11.2"
 serde = { version = "1.0", features = ["derive"] }
 serde_yaml = "0.9"
 chrono = "0.4.19"
+clap_complete = "3.2.3"
 
 [profile.release]
 # Enable link-time optimization (LTO). It’s a kind of whole-program or

src/config.rs

@@ -4,6 +4,7 @@ use std::env;
 use std::path::PathBuf;
 
 use clap::{ArgAction, ArgGroup, Parser, Subcommand, ValueEnum};
+use clap_complete::Shell;
 
 use crate::management::Strategy;
 
@@ -71,6 +72,13 @@ pub enum Command {
         #[clap(subcommand)]
         command: CatalogSubcommand,
     },
+
+    /// Print a shell completion script to stdout.
+    Generate {
+        /// Shell for which you want completion.
+        #[clap(value_parser = clap::value_parser!(Shell))]
+        shell: Shell,
+    },
 }
 
 /// Save or restore Tmux sessions.

src/main.rs

@@ -2,7 +2,8 @@
 //! Main runner
 
 use async_std::task;
-use clap::Parser;
+use clap::{CommandFactory, Parser};
+use clap_complete::generate;
 
 use tmux_revive::{
     actions::save,
@@ -52,6 +53,12 @@ async fn run(config: Config) {
         }
 
         Command::Restore { .. } => unimplemented!(),
+
+        Command::Generate { shell } => {
+            let mut app = Config::command();
+            let name = app.get_name().to_string();
+            generate(shell, &mut app, name, &mut std::io::stdout());
+        }
     }
 }