feat: add shell completions

Cargo.lock

@@ -107,6 +107,15 @@ dependencies = [
  "strsim",
 ]
 
+[[package]]
+name = "clap_complete"
+version = "4.5.66"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c757a3b7e39161a4e56f9365141ada2a6c915a8622c408ab6bb4b5d047371031"
+dependencies = [
+ "clap",
+]
+
 [[package]]
 name = "clap_derive"
 version = "4.5.55"
@@ -176,6 +185,7 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "clap",
+ "clap_complete",
  "crc32fast",
  "hmac",
  "libc",

Cargo.toml

@@ -13,3 +13,4 @@ hmac = "0.12"
 sha2 = "0.10"
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
+clap_complete = "4"

src/main.rs

@@ -9,7 +9,8 @@ use std::path::PathBuf;
 
 use anyhow::{Context, Result, bail};
 use clap::builder::styling::{AnsiColor, Effects, Styles};
-use clap::{Parser, Subcommand};
+use clap::{CommandFactory, Parser, Subcommand};
+use clap_complete::Shell;
 use protocol::{HSMIntf, Opcode};
 
 const STYLES: Styles = Styles::styled()
@@ -62,6 +63,11 @@ enum TopLevel {
         #[command(subcommand)]
         command: HwCmd,
     },
+    /// Generate shell completions
+    Completions {
+        /// Shell to generate completions for
+        shell: Shell,
+    },
 }
 
 // ─── Tools subcommands ───
@@ -271,6 +277,10 @@ fn run(cli: Cli) -> Result<()> {
     match cli.command {
         TopLevel::Tools { port, command } => run_tools(&port, command),
         TopLevel::Hw { port, command } => run_hw(&port, command),
+        TopLevel::Completions { shell } => {
+            clap_complete::generate(shell, &mut Cli::command(), "ectf-tools", &mut std::io::stdout());
+            Ok(())
+        }
     }
 }