mod: golang.org/x/mod/semver Index | Files

package semver

import "golang.org/x/mod/semver"

Package semver implements comparison of semantic version strings. In this package, semantic version strings must begin with a leading "v", as in "v1.0.0".

The general form of a semantic version string accepted by this package is

vMAJOR[.MINOR[.PATCH[-PRERELEASE][+BUILD]]]

where square brackets indicate optional parts of the syntax; MAJOR, MINOR, and PATCH are decimal integers without extra leading zeros; PRERELEASE and BUILD are each a series of non-empty dot-separated identifiers using only alphanumeric characters and hyphens; and all-numeric PRERELEASE identifiers must not have leading zeros.

This package follows Semantic Versioning 2.0.0 (see semver.org) with two exceptions. First, it requires the "v" prefix. Second, it recognizes vMAJOR and vMAJOR.MINOR (with no prerelease or build suffixes) as shorthands for vMAJOR.0.0 and vMAJOR.MINOR.0.

Index

Package Files

semver.go

func Build Uses

func Build(v string) string

Build returns the build suffix of the semantic version v. For example, Build("v2.1.0+meta") == "+meta". If v is an invalid semantic version string, Build returns the empty string.

func Canonical Uses

func Canonical(v string) string

Canonical returns the canonical formatting of the semantic version v. It fills in any missing .MINOR or .PATCH and discards build metadata. Two semantic versions compare equal only if their canonical formattings are identical strings. The canonical invalid semantic version is the empty string.

func Compare Uses

func Compare(v, w string) int

Compare returns an integer comparing two versions according to according to semantic version precedence. The result will be 0 if v == w, -1 if v < w, or +1 if v > w.

An invalid semantic version string is considered less than a valid one. All invalid semantic version strings compare equal to each other.

func IsValid Uses

func IsValid(v string) bool

IsValid reports whether v is a valid semantic version string.

func Major Uses

func Major(v string) string

Major returns the major version prefix of the semantic version v. For example, Major("v2.1.0") == "v2". If v is an invalid semantic version string, Major returns the empty string.

func MajorMinor Uses

func MajorMinor(v string) string

MajorMinor returns the major.minor version prefix of the semantic version v. For example, MajorMinor("v2.1.0") == "v2.1". If v is an invalid semantic version string, MajorMinor returns the empty string.

func Max Uses

func Max(v, w string) string

Max canonicalizes its arguments and then returns the version string that compares greater.

func Prerelease Uses

func Prerelease(v string) string

Prerelease returns the prerelease suffix of the semantic version v. For example, Prerelease("v2.1.0-pre+meta") == "-pre". If v is an invalid semantic version string, Prerelease returns the empty string.

Package semver is imported by 7 packages. Updated 2019-06-02. Refresh now. Tools for package owners.