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27 lines
848 B
Rust
27 lines
848 B
Rust
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
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use std::borrow::Cow;
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/// Normalizes a package name for use at `node_modules/.deno/<pkg-name>@<version>[_<copy_index>]`
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pub fn normalize_pkg_name_for_node_modules_deno_folder(name: &str) -> Cow<str> {
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let name = if name.to_lowercase() == name {
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Cow::Borrowed(name)
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} else {
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Cow::Owned(format!("_{}", mixed_case_package_name_encode(name)))
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};
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if name.starts_with('@') {
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name.replace('/', "+").into()
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} else {
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name
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}
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}
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fn mixed_case_package_name_encode(name: &str) -> String {
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// use base32 encoding because it's reversible and the character set
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// only includes the characters within 0-9 and A-Z so it can be lower cased
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base32::encode(
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base32::Alphabet::Rfc4648Lower { padding: false },
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name.as_bytes(),
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)
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.to_lowercase()
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}
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