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Allow listing submodule recipes with
--list PATH (#2108)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| use super::*; | ||
|
|
||
| #[derive(Debug, PartialEq, Clone)] | ||
| pub(crate) struct ModulePath { | ||
| pub(crate) path: Vec<String>, | ||
| pub(crate) spaced: bool, | ||
| } | ||
|
|
||
| impl TryFrom<&[&str]> for ModulePath { | ||
| type Error = (); | ||
|
|
||
| fn try_from(path: &[&str]) -> Result<Self, Self::Error> { | ||
| let spaced = path.len() > 1; | ||
|
|
||
| let path = if path.len() == 1 { | ||
| let first = path[0]; | ||
|
|
||
| if first.starts_with(':') || first.ends_with(':') || first.contains(":::") { | ||
| return Err(()); | ||
| } | ||
|
|
||
| first | ||
| .split("::") | ||
| .map(str::to_string) | ||
| .collect::<Vec<String>>() | ||
| } else { | ||
| path.iter().map(|s| (*s).to_string()).collect() | ||
| }; | ||
|
|
||
| for name in &path { | ||
| if name.is_empty() { | ||
| return Err(()); | ||
| } | ||
|
|
||
| for (i, c) in name.chars().enumerate() { | ||
| if i == 0 { | ||
| if !Lexer::is_identifier_start(c) { | ||
| return Err(()); | ||
| } | ||
| } else if !Lexer::is_identifier_continue(c) { | ||
| return Err(()); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| Ok(Self { path, spaced }) | ||
| } | ||
| } | ||
|
|
||
| impl Display for ModulePath { | ||
| fn fmt(&self, f: &mut Formatter) -> fmt::Result { | ||
| for (i, name) in self.path.iter().enumerate() { | ||
| if i > 0 { | ||
| if self.spaced { | ||
| write!(f, " ")?; | ||
| } else { | ||
| write!(f, "::")?; | ||
| } | ||
| } | ||
| write!(f, "{name}")?; | ||
| } | ||
| Ok(()) | ||
| } | ||
| } | ||
|
|
||
| #[cfg(test)] | ||
| mod tests { | ||
| use super::*; | ||
|
|
||
| #[test] | ||
| fn try_from_ok() { | ||
| #[track_caller] | ||
| fn case(path: &[&str], expected: &[&str], display: &str) { | ||
| let actual = ModulePath::try_from(path).unwrap(); | ||
| assert_eq!(actual.path, expected); | ||
| assert_eq!(actual.to_string(), display); | ||
| } | ||
|
|
||
| case(&[], &[], ""); | ||
| case(&["foo"], &["foo"], "foo"); | ||
| case(&["foo0"], &["foo0"], "foo0"); | ||
| case(&["foo", "bar"], &["foo", "bar"], "foo bar"); | ||
| case(&["foo::bar"], &["foo", "bar"], "foo::bar"); | ||
| } | ||
|
|
||
| #[test] | ||
| fn try_from_err() { | ||
| #[track_caller] | ||
| fn case(path: &[&str]) { | ||
| assert!(ModulePath::try_from(path).is_err()); | ||
| } | ||
|
|
||
| case(&[":foo"]); | ||
| case(&["foo:"]); | ||
| case(&["foo:::bar"]); | ||
| case(&["0foo"]); | ||
| case(&["f$oo"]); | ||
| case(&[""]); | ||
| } | ||
| } |
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