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Avoid passing cached wheels to the resolver step (#70)

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When we go to install a locked `requirements.txt`, if a wheel is already
available in the local cache, and matches the version specifiers, we can
just use it directly without fetching the package metadata. This speeds
up the no-op case by about 33%.

Closes https://github.com/astral-sh/puffin/issues/48.
This commit is contained in:
Charlie Marsh 2023-10-08 22:17:19 -04:00 • committed by GitHub
parent 75cb7a0178
commit ba72950546
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GPG key ID: 4AEE18F83AFDEB23
13 changed files with 534 additions and 287 deletions
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37
crates/pep508-rs/src/lib.rs
View file

@ -302,6 +302,25 @@ impl Requirement {
}
impl Requirement {
/// Returns `true` if the [`Version`] satisfies the [`Requirement`].
pub fn is_satisfied_by(&self, version: &Version) -> bool {
let Some(specifiers) =
self.version_or_url
.as_ref()
.and_then(|version_or_url| match version_or_url {
VersionOrUrl::VersionSpecifier(specifiers) => Some(specifiers),
// TODO(charlie): Support URL dependencies.
VersionOrUrl::Url(_) => None,
})
else {
return false;
};
specifiers
.iter()
.all(|specifier| specifier.contains(version))
}
/// Returns whether the markers apply for the given environment
pub fn evaluate_markers(&self, env: &MarkerEnvironment, extras: &[String]) -> bool {
if let Some(marker) = &self.marker {
@ -572,12 +591,12 @@ fn parse_extras(chars: &mut CharIter) -> Result<Option<Vec<String>>, Pep508Error
Some((pos, other)) => {
return Err(Pep508Error {
message: Pep508ErrorSource::String(format!(
"Expected an alphanumeric character starting the extra name, found '{other}'"
)),
"Expected an alphanumeric character starting the extra name, found '{other}'"
)),
start: pos,
len: 1,
input: chars.copy_chars(),
})
});
}
None => return Err(early_eof_error),
}
@ -601,10 +620,9 @@ fn parse_extras(chars: &mut CharIter) -> Result<Option<Vec<String>>, Pep508Error
start: pos,
len: 1,
input: chars.copy_chars(),
})
});
}
_=>{}
_ => {}
};
// wsp* after the identifier
chars.eat_whitespace();
@ -625,7 +643,7 @@ fn parse_extras(chars: &mut CharIter) -> Result<Option<Vec<String>>, Pep508Error
start: pos,
len: 1,
input: chars.copy_chars(),
})
});
}
None => return Err(early_eof_error),
}
@ -734,7 +752,7 @@ fn parse_version_specifier_parentheses(
let specifier = parse_specifier(chars, &buffer, start, end)?;
specifiers.push(specifier);
break Some(VersionOrUrl::VersionSpecifier(specifiers.into_iter().collect()));
},
}
Some((_, char)) => buffer.push(char),
None => return Err(Pep508Error {
message: Pep508ErrorSource::String("Missing closing parenthesis (expected ')', found end of dependency specification)".to_string()),
@ -789,7 +807,7 @@ fn parse(chars: &mut CharIter) -> Result<Requirement, Pep508Error> {
start: chars.get_pos(),
len: 1,
input: chars.copy_chars(),
})
});
}
};
@ -1036,6 +1054,7 @@ mod tests {
},
);
}
#[test]
fn error_extras_illegal_character() {
assert_err(