Non-ASCII crate names don’t seem to work

[ftxqxd]

$ cargo new áccênts
$ cd áccênts
$ cargo publish
    Updating registry `https://github.com/rust-lang/crates.io-index`
Warning: manifest has no license. See http://doc.crates.io/manifest.html#package-metadata for more info.
   Uploading áccênts v0.0.0 (file:///home/me/%C3%A1cc%C3%AAnts)
failed to get a 200 OK response: Response {500, content-length: 30, server: nginx, via: 1.1 vegur, connection: keep-alive, date: Sat, 22 Nov 2014 01:35:10 GMT, Error 404: Not Found
Not Found]

I’m not sure if this a Cargo bug or a crates.io bug. Should non-ASCII crate names be allowed at all (at this stage)?

[alexcrichton]

We can look into expanding the set of possible crate names at a later date, but for now we're going to reject them.

[JonasOlson]

Is there somewhere one can see a specification of what names are allowed?

[dtolnay]

@JonasOlson this is the current crate name validation logic:

crates.io/src/views/krate_publish.rs

Lines 73 to 80 in 54a3f10

	if !Crate::valid_name(&s) {
	let value = de::Unexpected::Str(&s);
	let expected = format!(
	"a valid crate name to start with a letter, contain only letters, \
	numbers, hyphens, or underscores and have at most {} characters",
	MAX_NAME_LENGTH
	);
	Err(de::Error::invalid_value(value, &expected.as_ref()))

crates.io/src/models/krate.rs

Lines 252 to 264 in 54a3f10

	pub fn valid_name(name: &str) -> bool {
	let under_max_length = name.chars().take(MAX_NAME_LENGTH + 1).count() <= MAX_NAME_LENGTH;
	Crate::valid_ident(name) && under_max_length
	}
	fn valid_ident(name: &str) -> bool {
	Self::valid_feature_prefix(name)
	&& name
	.chars()
	.next()
	.map(char::is_alphabetic)
	.unwrap_or(false)
	}

crates.io/src/models/krate.rs

Lines 276 to 281 in 54a3f10

	fn valid_feature_prefix(name: &str) -> bool {
	!name.is_empty()
	&& name
	.chars()
	.all(|c| c.is_ascii_alphanumeric() || c == '_' || c == '-')
	}

crates.io/src/models/krate.rs

Line 73 in 54a3f10

pub const MAX_NAME_LENGTH: usize = 64;

[JonasOlson]

@dtolnay: Thanks. And then there are reserved names, I understand (though I don't know what "migrations", which appear as the name of a directory in the path, are).