Crate pep508_rs

A library for python dependency specifiers better known as PEP 508

Usage

use std::str::FromStr;
use pep508_rs::{Requirement, ExtraName};

let marker = r#"requests [security,tests] >= 2.8.1, == 2.8.* ; python_version > "3.8""#;
let dependency_specification = Requirement::from_str(marker).unwrap();
assert_eq!(dependency_specification.name.as_ref(), "requests");
assert_eq!(dependency_specification.extras, vec![ExtraName::from_str("security").unwrap(), ExtraName::from_str("tests").unwrap()]);

Structs

• Cursor
  A Cursor over a string.
• ExtraName
  The normalized name of an extra dependency group.
• Extras
  A list of ExtraName that can be attached to a Requirement.
• InvalidNameError
  Invalid crate::PackageName or crate::ExtraName.
• MarkerEnvironment
  The marker values for a python interpreter, normally the current one
• MarkerExpression
  Represents one clause such as python_version > "3.8" in the form
• PackageName
  The normalized name of a package.
• Pep508Error
  Error with a span attached. Not that those aren’t String but Vec<char> indices.
• Requirement
  A PEP 508 dependency specification
• StringVersion
  Helper type with a Version and its original text
• VerbatimUrl
  A wrapper around Url that preserves the original string.

Enums

• MarkerOperator
  How to compare key and value, such as by ==, > or not in
• MarkerTree
  Represents one of the nested marker expressions with and/or/parentheses
• MarkerValue
  One of the predefined environment values
• MarkerValueString
  Those environment markers with an arbitrary string as value such as sys_platform
• MarkerValueVersion
  Those environment markers with a PEP 440 version as value such as python_version
• MarkerWarningKind
  Ways in which marker evaluation can fail
• Pep508ErrorSource
  Either we have an error string from our parser or an upstream error from url
• VersionOrUrl
  The actual version specifier or url to install

Functions

• split_scheme
  Like Url::parse, but only splits the scheme. Derived from the url crate.