106 lines
2.4 KiB
Go
106 lines
2.4 KiB
Go
package version
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import (
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"fmt"
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"regexp"
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"strconv"
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"strings"
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)
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// Info : data structure for program version information
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type Info struct {
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Major int
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Minor int
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Patch int
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Prerelease []string
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BuildInfo []string
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}
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// Equal compares two Info structs for equality
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func (i Info) Equal(o Info) bool {
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if i.Major != o.Major || i.Minor != o.Minor || i.Patch != o.Patch {
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return false
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}
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if len(i.Prerelease) != len(o.Prerelease) || len(i.BuildInfo) != len(o.BuildInfo) {
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return false
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}
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for j := 0; j < len(i.Prerelease); j++ {
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if i.Prerelease[j] != o.Prerelease[j] {
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return false
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}
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}
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for j := 0; j < len(i.BuildInfo); j++ {
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if i.BuildInfo[j] != o.BuildInfo[j] {
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return false
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}
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}
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return true
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}
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// String returns a human friendly version string
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func (i Info) String() string {
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var b strings.Builder
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fmt.Fprintf(&b, "v%d.%d.%d", i.Major, i.Minor, i.Patch)
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if len(i.Prerelease) > 0 {
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fmt.Fprintf(&b, "-%s", strings.Join(i.Prerelease, "."))
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}
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if len(i.BuildInfo) > 0 {
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fmt.Fprintf(&b, "+%s", strings.Join(i.BuildInfo, "."))
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}
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return b.String()
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}
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/* reStr is a regular expression string to parse the output of git describe
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Match groups:
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1. version number (without "v")
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2. major version
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3. minor version
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4. patch version
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5. prerelease identifier
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6. commit count
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7. git short hash
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8. "-dirty" if dirty, else ""
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*/
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const reStr = `^(?:v(([0-9]+)(?:\.([0-9]+)(?:\.([0-9]+))?)?))?(?:-((?:alpha|beta|rc|dev)(?:\.[a-zA-Z0-9]+)*))?(?:-([0-9]+)-g)?([a-f0-9A-F]+)?(?:(-dirty))?$`
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var re = regexp.MustCompile(reStr)
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func parseGitDescribe(input string) Info {
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matches := re.FindStringSubmatch(input)
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if matches == nil || matches[0] == "" {
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return Info{0, 0, 0, []string{"dev"}, []string{"unknown"}}
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}
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info := Info{}
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if matches[2] != "" {
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num, _ := strconv.Atoi(matches[2])
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info.Major = num
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}
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if matches[3] != "" {
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num, _ := strconv.Atoi(matches[3])
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info.Minor = num
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}
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if matches[4] != "" {
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num, _ := strconv.Atoi(matches[4])
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info.Patch = num
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}
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if matches[5] != "" {
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info.Prerelease = strings.Split(matches[5], ".")
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}
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if matches[6] != "" || matches[7] != "" || matches[8] != "" {
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info.BuildInfo = append(info.BuildInfo, "git")
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if matches[6] != "" {
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info.BuildInfo = append(info.BuildInfo, matches[6])
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}
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if matches[7] != "" {
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info.BuildInfo = append(info.BuildInfo, matches[7])
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}
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if matches[8] != "" {
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info.BuildInfo = append(info.BuildInfo, "dirty")
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}
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}
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return info
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}
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