Added command for generating the kopyto

src/args.rs

@@ -24,7 +24,8 @@ pub enum ArgCommand {
 	Write(ArgWrite),
 	Erase(ArgErase),
 	Monitor(ArgMonitor),
-	Run(ArgRun)
+	Run(ArgRun),
+	Example(ArgExample)
 }
 
 #[derive(FromArgs)]
@@ -90,6 +91,11 @@ pub struct ArgWrite {
 #[argp(subcommand, name = "erase")]
 pub struct ArgErase {}
 
+#[derive(FromArgs)]
+#[argp(description = "Opens the serial monitor.")]
+#[argp(subcommand, name = "monitor")]
+pub struct ArgMonitor {}
+
 #[derive(FromArgs)]
 #[argp(description = "Handy shorthand for `write --cmd \"sdcc <srcpath>\" --monitor <hexpath>`.")]
 #[argp(subcommand, name = "run")]
@@ -100,9 +106,13 @@ pub struct ArgRun {
 }
 
 #[derive(FromArgs)]
-#[argp(description = "Opens the serial monitor.")]
-#[argp(subcommand, name = "monitor")]
-pub struct ArgMonitor {}
+#[argp(description = "Generates a \"stub\" C file for the TUL výukový přípravek™.")]
+#[argp(subcommand, name = "example")]
+pub struct ArgExample {
+	#[argp(positional)]
+	#[argp(description = "Path to the source C file to be generated.")]
+	pub path: Option<OsString>
+}
 
 pub fn parse() -> Args {
 	let args: Args = argp::parse_args_or_exit(argp::DEFAULT);

src/main.rs

@@ -272,9 +272,32 @@ fn run_chip(args: ArgRun, target: &mut PhysicalTarget) -> Result<(), Error> {
 	}, target)
 }
 
+fn gen_example(args: ArgExample) -> Result<(), Error> {
+	let path = PathBuf::from(args.path.unwrap_or(OsString::from("example.c")));
+
+	if path.try_exists()? {
+		Err(Error::other("File already exists"))?
+	}
+
+	std::fs::write(&path, include_bytes!("../example.c"))?;
+
+	let path = path.to_string_lossy();
+	println!("Example source code generated to `{}`.", path);
+	println!("Execute `tulflash run \"{}\"` to run it.", path);
+	Ok(())
+}
+
 fn main() {
 	let args = args::parse();
 
+	if let ArgCommand::Example(args) = args.command {
+		if let Err(err) = gen_example(args) {
+			println!("Error generating example source code: {}", err);
+		}
+
+		return
+	}
+
 	let start = SystemTime::now();
 
 	let port = args.port.or_else(|| {
@@ -300,7 +323,8 @@ fn main() {
 		ArgCommand::Write(args) => write_chip(args, &mut target),
 		ArgCommand::Erase(args) => erase_chip(args, &mut target),
 		ArgCommand::Monitor(args) => monitor_chip(args, &mut target),
-		ArgCommand::Run(args) => run_chip(args, &mut target)
+		ArgCommand::Run(args) => run_chip(args, &mut target),
+		ArgCommand::Example(_) => unreachable!()
 	};
 
 	if let Err(err) = res {