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version.go
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version.go
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package project
import (
"errors"
"regexp"
"strconv"
"strings"
)
var VersionRegexp = regexp.MustCompile("(\\d+)\\.(\\d+)\\.(\\d+)")
func FromVersionString(s string) (*Version, error) {
versions := VersionRegexp.FindAllStringSubmatch(s, -1)
if len(versions) == 0 || len(versions[0]) != 4 {
return nil, errors.New(s + " is not an available version")
}
vs := versions[0]
major, _ := strconv.ParseInt(vs[1], 10, 10)
minor, _ := strconv.ParseInt(vs[2], 10, 10)
patch, _ := strconv.ParseInt(vs[3], 10, 10)
return &Version{
Major: int(major),
Minor: int(minor),
Patch: int(patch),
}, nil
}
type Version struct {
Latest bool
Suffix string
Prefix string
Major int
Minor int
Patch int
}
func (v Version) IsStable() bool {
return !(v.Latest || v.Suffix != "")
}
func (v Version) String() string {
version := "latest"
if !v.Latest {
versions := []string{
strconv.Itoa(v.Major),
strconv.Itoa(v.Minor),
strconv.Itoa(v.Patch),
}
version = strings.Join(versions, ".")
}
if v.Prefix != "" {
version = v.Prefix + "-" + version
}
if v.Suffix != "" {
version = version + "-" + v.Suffix
}
return strings.ToLower(version)
}
func (v Version) IncreaseMajor() Version {
v.Major = v.Major + 1
v.Minor = 0
v.Patch = 0
return v
}
func (v Version) IncreaseMinor() Version {
v.Minor = v.Minor + 1
v.Patch = 0
return v
}
func (v Version) IncreasePatch() Version {
v.Patch = v.Patch + 1
return v
}
func (v Version) MarshalYAML() (interface{}, error) {
return v.String(), nil
}
func (v *Version) UnmarshalYAML(unmarshal func(interface{}) error) error {
var value string
err := unmarshal(&value)
if err != nil {
return err
}
if version, err := FromVersionString(value); err == nil {
v.Major = version.Major
v.Minor = version.Minor
v.Patch = version.Patch
return nil
} else {
return err
}
return nil
}