flagon-io/hello

public

Greets people from the command line. The sample repository for g1t.

Add a --version flag that prints the crate version and exits #26

Mergedg1tbot merged into mainrequested by syntaqx

Approved by g1t

3 files+36−10/3 viewed

+18−1Viewed

7	7		pub name: Option<String>,
8	8		/// Whether to upper-case the greeting (`--shout`).
9	9		pub shout: bool,
	10	+	/// Whether to print the crate version and exit (`--version`).
	11	+	pub version: bool,
10	12		}
11	13
12	14		/// Parses command-line arguments (excluding the program name).
13	15		///
14		−	/// `--shout` sets [`Options::shout`]; other arguments starting with `--` are
	16	+	/// `--shout` sets [`Options::shout`] and `--version` sets
	17	+	/// [`Options::version`]; other arguments starting with `--` are
15	18		/// treated as flags and skipped. The name is the first remaining argument.
16	19		pub fn parse_args<I: IntoIterator<Item = String>>(args: I) -> Options {
17	20		let mut options = Options::default();
18	21		for arg in args {
19	22		if arg == "--shout" {
20	23		options.shout = true;
	24	+	} else if arg == "--version" {
	25	+	options.version = true;
21	26		} else if !arg.starts_with("--") && options.name.is_none() {
22	27		options.name = Some(arg);
23	28		}
⋯
97	102		}
98	103
99	104		#[test]
	105	+	fn parse_args_version_defaults_off() {
	106	+	assert!(!parse_args(args(&["Ada"])).version);
	107	+	}
	108	+
	109	+	#[test]
	110	+	fn parse_args_version() {
	111	+	let options = parse_args(args(&["--version"]));
	112	+	assert!(options.version);
	113	+	assert_eq!(options.name, None);
	114	+	}
	115	+
	116	+	#[test]
100	117		fn shout_upper_cases_greeting() {
101	118		assert_eq!(shout(&greeting("Ada")), "HELLO, ADA!");
102	119		}

+4−0Viewed

4	4
5	5		fn main() {
6	6		let options = parse_args(env::args().skip(1));
	7	+	if options.version {
	8	+	println!("{}", env!("CARGO_PKG_VERSION"));
	9	+	return;
	10	+	}
7	11		// The name given, or whoever is signed in.
8	12		let name = options
9	13		.name

+14−0Viewed

1	+	use std::process::Command;
2	+
3	+	#[test]
4	+	fn version_flag_prints_crate_version() {
5	+	let output = Command::new(env!("CARGO_BIN_EXE_hello"))
6	+	.arg("--version")
7	+	.output()
8	+	.unwrap();
9	+	assert!(output.status.success());
10	+	assert_eq!(
11	+	String::from_utf8(output.stdout).unwrap(),
12	+	format!("{}\n", env!("CARGO_PKG_VERSION"))
13	+	);
14	+	}