add command completion generation

Cargo.lock

@@ -94,6 +94,15 @@ dependencies = [
  "strsim",
 ]
 
+[[package]]
+name = "clap_complete"
+version = "4.5.37"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "11611dca53440593f38e6b25ec629de50b14cdfa63adc0fb856115a2c6d97595"
+dependencies = [
+ "clap",
+]
+
 [[package]]
 name = "clap_derive"
 version = "4.5.18"
@@ -174,6 +183,7 @@ name = "disk-read-benchmark"
 version = "0.2.0"
 dependencies = [
  "clap",
+ "clap_complete",
  "csv",
  "curl",
  "rand",

Cargo.toml

@@ -5,6 +5,7 @@ edition = "2021"
 
 [dependencies]
 clap = { version = "4.5.20", features = ["cargo", "derive"] }
+clap_complete = "4.5.37"
 csv = "1.3.0"
 curl = "0.4.47"
 rand = "0.8.5"

src/cli.rs

@@ -8,7 +8,14 @@ pub struct Cli {
 }
 
 #[derive(Subcommand)]
+#[derive(Debug)]
 pub enum Commands {
+    ///Generate bash completions
+    GenerateBashCompletions,
+    ///Generate zsh completions
+    GenerateZshCompletions,
+    ///Generate fish completions
+    GenerateFishCompletions,
     ///Grabs the datasets used for benchmarking
     GrabData,
     ///Runs the benchmark

src/lib.rs

@@ -1,3 +1,3 @@
-pub mod dataset_gathering;
 pub mod benchmarks;
 pub mod cli;
+pub mod dataset_gathering;

src/main.rs

@@ -1,7 +1,9 @@
-use clap::Parser;
+use clap::{CommandFactory, Parser};
+use clap_complete::aot::{generate, Bash, Fish, Zsh};
 use disk_read_benchmark::benchmarks::benchmark;
 use disk_read_benchmark::cli::*;
 use disk_read_benchmark::dataset_gathering::*;
+use std::io::stdout;
 
 fn main() {
     let cli = Cli::parse();
@@ -22,5 +24,30 @@ fn main() {
             grab_datasets().unwrap(); // * should unwrap
             benchmark();
         }
+        // I can't be bothered to do this how I *should*, rather than hardcoding it
+        Commands::GenerateBashCompletions => {
+            generate(
+                Bash,
+                &mut Cli::command(),
+                "disk-read-benchmark",
+                &mut stdout(),
+            );
+        }
+        Commands::GenerateZshCompletions => {
+            generate(
+                Zsh,
+                &mut Cli::command(),
+                "disk-read-benchmark",
+                &mut stdout(),
+            );
+        }
+        Commands::GenerateFishCompletions => {
+            generate(
+                Fish,
+                &mut Cli::command(),
+                "disk-read-benchmark",
+                &mut stdout(),
+            );
+        }
     }
 }