export type Requirement = ProjectNameRequirement | ProjectURLRequirement | RequirementsFileRequirement | ConstraintsFileRequirement;
/** @example pip == 22.0.2 */
export interface ProjectNameRequirement extends ProjectRequirementBase {
    type: 'ProjectName';
    versionSpec?: VersionSpec[];
}
/** @example pip @ https://github.com/pypa/pip/archive/22.0.2.zip */
export interface ProjectURLRequirement extends ProjectRequirementBase {
    type: 'ProjectURL';
    url: string;
}
interface ProjectRequirementBase {
    name: string;
    extras?: string[];
    environmentMarkerTree?: EnvironmentMarker;
}
/** @example -r {path} */
export interface RequirementsFileRequirement extends FileRequirementBase {
    type: 'RequirementsFile';
}
/** @example -c {path} */
export interface ConstraintsFileRequirement extends FileRequirementBase {
    type: 'ConstraintsFile';
}
interface FileRequirementBase {
    path: string;
}
export type EnvironmentMarker = EnvironmentMarkerNode | EnvironmentMarkerLeaf;
export interface EnvironmentMarkerNode {
    operator: 'and' | 'or';
    left: EnvironmentMarker;
    right: EnvironmentMarker;
}
export interface EnvironmentMarkerLeaf {
    left: EnvironmentMarkerVariable | PythonString;
    operator: EnvironmentMarkerVersionOperator;
    right: PythonString | EnvironmentMarkerVariable;
}
/** {@link https://peps.python.org/pep-0508/#environment-markers See reference.} */
export declare enum EnvironmentMarkerVariable {
    /** Python equivalent: `'.'.join(platform.python_version_tuple()[:2])` @example 3.11 */
    PythonVersion = "python_version",
    /** Python equivalent: `platform.python_version()` @example 3.11.2 */
    PythonFullVersion = "python_full_version",
    /** Python equivalent: `os.name` @example posix */
    OsName = "os_name",
    /** Python equivalent: `sys.platform` @example linux */
    SysPlatform = "sys_platform",
    /** Python equivalent: `platform.release()` @example 3.14.1-x86_64-linode39 */
    PlatformRelease = "platform_release",
    /** Python equivalent: `platform.system()` @example Windows */
    PlatformSystem = "platform_system",
    /** Python equivalent: `platform.version()` @example #1 SMP Debian 4.19 */
    PlatformVersion = "platform_version",
    /** Python equivalent: `platform.machine()` @example x86_64 */
    PlatformMachine = "platform_machine",
    /** Python equivalent: `platform.python_implementation()` @example CPython */
    PlatformPythonImplementation = "platform_python_implementation",
    /** Python equivalent: `sys.implementation.name` @example cpython */
    ImplementationName = "implementation_name",
    /** Python equivalent: processed `sys.implementation.version` @example 3.11.2 */
    ImplementationVersion = "implementation_version",
    /** An error except when defined by the context interpreting the specification @example test */
    Extra = "extra"
}
export type PythonString = `"${string}"` | `'${string}'`;
export type EnvironmentMarkerVersionOperator = VersionOperator | 'in' | 'not in';
/** {@link https://peps.python.org/pep-0440/#arbitrary-equality See reference.} */
export interface VersionSpec {
    operator: VersionOperator;
    version: string;
}
/** {@link https://peps.python.org/pep-0440/#version-specifiers See reference.} */
export declare enum VersionOperator {
    /** {@link https://peps.python.org/pep-0440/#compatible-release See reference.} */
    CompatibleRelease = "~=",
    /** {@link https://peps.python.org/pep-0440/#version-matching See reference.} */
    VersionMatching = "==",
    /** {@link https://peps.python.org/pep-0440/#version-exclusion See reference.} */
    VersionExclusion = "!=",
    /** {@link https://peps.python.org/pep-0440/#inclusive-ordered-comparison See reference.} */
    LessThanOrMatching = "<=",
    /** {@link https://peps.python.org/pep-0440/#inclusive-ordered-comparison See reference.} */
    GreaterThanOrMatching = ">=",
    /** {@link https://peps.python.org/pep-0440/#exclusive-ordered-comparison See reference.} */
    LessThan = "<",
    /** {@link https://peps.python.org/pep-0440/#exclusive-ordered-comparison See reference.} */
    GreaterThan = ">",
    /** {@link https://peps.python.org/pep-0440/#arbitrary-equality See reference.} */
    ArbitrarilyEqual = "==="
}
/** Barebones name requirement parsed in loose mode. */
export interface LooseProjectNameRequirement {
    type: 'ProjectName';
    name: string;
}
export {};