git.delta.rocks / jrsonnet / refs/commits / e98be8b771cf

10	pub value: String,10	pub value: String,
11}11}
1212
13/// Parses a string like `name=<value>`, or `name` and reads value from env variable.
14/// With no value it will be read from env variable.
15/// If env variable is not found then it will be an error.
16/// Value can contain `=` symbol.
17///
18/// ```
19/// use std::str::FromStr;
20/// use jrsonnet_cli::ExtStr;
21///
22/// let ext = ExtStr::from_str("name=value").unwrap();
23/// assert_eq!(ext.name, "name");
24/// assert_eq!(ext.value, "value");
25///
26/// std::env::set_var("name", "value");
27///
28/// let ext = ExtStr::from_str("name").unwrap();
29/// assert_eq!(ext.name, "name");
30/// assert_eq!(ext.value, "value");
31///
32/// let ext = ExtStr::from_str("name=value=with=equals").unwrap();
33/// assert_eq!(ext.name, "name");
34/// assert_eq!(ext.value, "value=with=equals");
35/// ```
36///
13impl FromStr for ExtStr {37impl FromStr for ExtStr {
14	type Err = &'static str;38	type Err = &'static str;
39
15	fn from_str(s: &str) -> std::result::Result<Self, Self::Err> {40	fn from_str(s: &str) -> std::result::Result<Self, Self::Err> {
16		let out: Vec<_> = s.split('=').collect();
17		match out.len() {41		match s.find('=') {
18			1 => Ok(ExtStr {42			Some(idx) => Ok(ExtStr {
19				name: out[0].to_owned(),43				name: s[..idx].to_owned(),
20				value: std::env::var(out[0]).or(Err("missing env var"))?,44				value: s[idx + 1..].to_owned(),
21			}),45			}),
22			2 => Ok(ExtStr {46			None => Ok(ExtStr {
23				name: out[0].to_owned(),47				name: s.to_owned(),
24				value: out[1].to_owned(),48				value: std::env::var(s).or(Err("missing env var"))?,
25			}),49			}),
26
27			_ => Err("bad ext-str syntax"),
28		}50		}
29	}51	}
30}52}