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//go:build ignore
package main
import (
"fmt"
"log"
"os/exec"
"strings"
"github.com/blang/semver"
)
func getTag(match ...string) (string, *semver.PRVersion) {
args := append([]string{
"describe", "--tags",
}, match...)
if tag, err := exec.Command("git", args...).Output(); err != nil {
return "", nil
} else {
tagParts := strings.Split(string(tag), "-")
if len(tagParts) == 3 {
ahead, err := semver.NewPRVersion(tagParts[1])
if err == nil {
return tagParts[0], &ahead
}
log.Printf("semver.NewPRVersion(%s): %v", tagParts[1], err)
} else if len(tagParts) == 4 {
ahead, err := semver.NewPRVersion(tagParts[2])
if err == nil {
return tagParts[0] + "-" + tagParts[1], &ahead
}
log.Printf("semver.NewPRVersion(%s): %v", tagParts[2], err)
}
return string(tag), nil
}
}
func main() {
// Find the last vX.X.X Tag and get how many builds we are ahead of it.
versionStr, ahead := getTag("--match", "v*")
version, err := semver.ParseTolerant(versionStr)
if err != nil {
// no version tag found so just return what ever we can find.
log.Printf("semver.ParseTolerant(%s): %v", versionStr, err)
fmt.Println("0.0.0-unknown")
return
}
if ahead == nil {
// Seems that we are going to build a release.
// So the version number should already be correct.
fmt.Println(version.String())
return
}
// Get the tag of the current revision.
tag, _ := getTag("--exact-match")
// If we don't have any tag assume "dev"
if tag == "" || strings.HasPrefix(tag, "nightly") {
tag = "dev"
}
// Get the most likely next version:
if !strings.Contains(version.String(), "rc") {
version.Patch = version.Patch + 1
}
if pr, err := semver.NewPRVersion(tag); err == nil {
// append the tag as pre-release name
version.Pre = append(version.Pre, pr)
} else {
log.Printf("semver.NewPRVersion(%s): %v", tag, err)
}
// append how many commits we are ahead of the last release
version.Pre = append(version.Pre, *ahead)
fmt.Println(version.String())
}
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