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5 changes: 4 additions & 1 deletion crates/uv-distribution-types/src/index.rs
Original file line number Diff line number Diff line change
Expand Up @@ -158,7 +158,10 @@ impl FromStr for Index {
return Err(IndexSourceError::EmptyName);
}

if name.chars().all(char::is_alphanumeric) {
if name
.chars()
.all(|c| c.is_alphanumeric() || c == '-' || c == '_')
{
let url = IndexUrl::from_str(url)?;
return Ok(Self {
name: Some(name.to_string()),
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2 changes: 2 additions & 0 deletions docs/configuration/indexes.md
Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,8 @@ name = "pytorch"
url = "https://download.pytorch.org/whl/cpu"
```

Index names must only contain alphanumeric characters, dashes, or underscores.

Indexes are prioritized in the order in which they’re defined, such that the first index listed in
the configuration file is the first index consulted when resolving dependencies, with indexes
provided via the command line taking precedence over those in the configuration file.
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