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wails/cmd/semver.go
2020-12-29 07:26:24 +11:00

107 lines
2.9 KiB
Go

package cmd
import (
"fmt"
"github.com/Masterminds/semver"
)
// SemanticVersion is a struct containing a semantic version
type SemanticVersion struct {
Version *semver.Version
}
// NewSemanticVersion creates a new SemanticVersion object with the given version string
func NewSemanticVersion(version string) (*SemanticVersion, error) {
semverVersion, err := semver.NewVersion(version)
if err != nil {
return nil, err
}
return &SemanticVersion{
Version: semverVersion,
}, nil
}
// IsRelease returns true if it's a release version
func (s *SemanticVersion) IsRelease() bool {
// Limit to v1
if s.Version.Major() != 1 {
return false
}
return len(s.Version.Prerelease()) == 0 && len(s.Version.Metadata()) == 0
}
// IsPreRelease returns true if it's a prerelease version
func (s *SemanticVersion) IsPreRelease() bool {
// Limit to v1
if s.Version.Major() != 1 {
return false
}
return len(s.Version.Prerelease()) > 0
}
func (s *SemanticVersion) String() string {
return s.Version.String()
}
// IsGreaterThan returns true if this version is greater than the given version
func (s *SemanticVersion) IsGreaterThan(version *SemanticVersion) (bool, error) {
// Set up new constraint
constraint, err := semver.NewConstraint("> " + version.Version.String())
if err != nil {
return false, err
}
// Check if the desired one is greater than the requested on
success, msgs := constraint.Validate(s.Version)
if !success {
return false, msgs[0]
}
return true, nil
}
// IsGreaterThanOrEqual returns true if this version is greater than or equal the given version
func (s *SemanticVersion) IsGreaterThanOrEqual(version *SemanticVersion) (bool, error) {
// Set up new constraint
constraint, err := semver.NewConstraint(">= " + version.Version.String())
if err != nil {
return false, err
}
// Check if the desired one is greater than the requested on
success, msgs := constraint.Validate(s.Version)
if !success {
return false, msgs[0]
}
return true, nil
}
// MainVersion returns the main version of any version+prerelease+metadata
// EG: MainVersion("1.2.3-pre") => "1.2.3"
func (s *SemanticVersion) MainVersion() *SemanticVersion {
mainVersion := fmt.Sprintf("%d.%d.%d", s.Version.Major(), s.Version.Minor(), s.Version.Patch())
result, _ := NewSemanticVersion(mainVersion)
return result
}
// SemverCollection is a collection of SemanticVersion objects
type SemverCollection []*SemanticVersion
// Len returns the length of a collection. The number of Version instances
// on the slice.
func (c SemverCollection) Len() int {
return len(c)
}
// Less is needed for the sort interface to compare two Version objects on the
// slice. If checks if one is less than the other.
func (c SemverCollection) Less(i, j int) bool {
return c[i].Version.LessThan(c[j].Version)
}
// Swap is needed for the sort interface to replace the Version objects
// at two different positions in the slice.
func (c SemverCollection) Swap(i, j int) {
c[i], c[j] = c[j], c[i]
}