78 lines
3 KiB
Go
78 lines
3 KiB
Go
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// Package semverbump provides a function to bump a semVer tag, extending golang.org/x/mod/semver library.
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//
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// The function Bump() takes a semVer tag and a bump type (major, minor, patch) and returns the new semVer tag.
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// For example if the current semVer tag is v1.0.0 and the bump type is patch, the new semVer tag will be v1.0.1.
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// If the current semVer tag is v1.0.1 and the bump type is minor, the new semVer tag will be v1.1.0
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// (note that the patch version is reset to 0).
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//
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// Shortened semVer tags are supported, for example if the current semVer tag is v1.0 and the bump type is patch,
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// the bumped semVer tag will be v1.0.1.
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//
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// If the current semVer tag does not have a leading v, it will be added.
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// If it is an empty string, it will behave as if the current semVer tag is v0.0.0, e.g. if the bump type is patch,
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// the bumped semVer tag will be v0.0.1.
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//
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// If the current semVer tag is invalid, such as "x.y.z", an error will be returned.
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//
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// The library currently does not handle pre-release or build metadata.
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package main
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import (
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"fmt"
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"golang.org/x/mod/semver"
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"strconv"
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"strings"
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)
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// Bump takes a semVer tag and a bump type (major, minor, patch) and returns a new semVer tag
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// whose value is incremented according to the bump type. If the current semVer tag does not have a leading v,
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// it will be added. If it is an empty string, it will behave as if the current semVer tag is v0.0.0
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// Invalid semVer tags will return an error.
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func Bump(currentVersion, majorMinorPatch string) (string, error) {
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if currentVersion == "" {
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currentVersion = "v0.0.0"
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} else {
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if !semver.IsValid(currentVersion) {
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if semver.IsValid("v" + currentVersion) {
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currentVersion = "v" + currentVersion
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} else {
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return "", fmt.Errorf("invalid semVer tag '%s'", currentVersion)
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}
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}
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// semVer lib allows v1 and v1.0, so check for that
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if currentVersion == semver.Major(currentVersion) {
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currentVersion = currentVersion + ".0.0"
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}
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if currentVersion == semver.MajorMinor(currentVersion) {
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currentVersion = currentVersion + ".0"
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}
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}
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// now we have a valid currentVersion
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newMajor, newMinor, newPatch := majorMinorPatchFromSemVer(currentVersion)
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if majorMinorPatch == "major" {
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newMajor++
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newMinor = 0
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newPatch = 0
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} else if majorMinorPatch == "minor" {
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newMinor++
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newPatch = 0
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} else if majorMinorPatch == "patch" {
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newPatch++
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} else {
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return "", fmt.Errorf("invalid arg for majorMinorPatch, expect 'major', 'minor' or 'patch', got '%s'", majorMinorPatch)
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}
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return semVerFromMajorMinorPatch(newMajor, newMinor, newPatch), nil
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}
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func majorMinorPatchFromSemVer(semVer string) (int, int, int) {
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parts := strings.Split(semVer, ".")
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major, _ := strconv.Atoi(strings.TrimPrefix(parts[0], "v"))
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minor, _ := strconv.Atoi(parts[1])
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patch, _ := strconv.Atoi(parts[2])
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return major, minor, patch
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}
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func semVerFromMajorMinorPatch(major, minor, patch int) string {
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return "v" + strconv.Itoa(major) + "." + strconv.Itoa(minor) + "." + strconv.Itoa(patch)
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}
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