generate completions

build.rs

@@ -0,0 +1,23 @@
+use clap::{CommandFactory, ValueEnum};
+use clap_complete::{generate_to, Shell};
+use std::env;
+use std::io::Error;
+
+include!("src/arguments.rs");
+
+fn main() -> Result<(), Error> {
+	let output_folder = match env::var_os("OUT_DIR") {
+		None => return Ok(()),
+		Some(output_folder) => output_folder,
+	};
+	
+	let mut command = Arguments::command();
+	for &shell in Shell::value_variants() {
+		generate_to(shell, &mut command, "hexapoda", &output_folder)?;
+	}
+	
+	println!("cargo:warning=completions generated in {output_folder:?}");
+	println!("cargo:rerun-if-changed=src/arguments.rs");
+	
+	Ok(())
+}