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minio/buildscripts/gen-constants.go

109 lines
2.9 KiB

// +build ignore
/*
* Minio Cloud Storage, (C) 2015 Minio, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package main
import (
"fmt"
"net/http"
"os"
"os/exec"
"strings"
"text/template"
"time"
)
var constantsTemplate = `// -------- DO NOT EDIT --------
// This file is autogenerated by buildscripts/gen-constants.go during the release process.
package main
const (
minioVersion = {{if .Version}}"{{.Version}}"{{else}}""{{end}}
minioReleaseTag = {{if .ReleaseTag}}"{{.ReleaseTag}}"{{else}}""{{end}}
minioCommitID = {{if .CommitID}}"{{.CommitID}}"{{else}}""{{end}}
)
var (
minioShortCommitID = minioCommitID[:12]
)
`
// genConstants generates ‘build-constants.go’.
func genConstants(version string) {
t := template.Must(template.New("constants").Parse(constantsTemplate))
constantsFile, e := os.OpenFile("build-constants.go", os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0600)
if e != nil {
fmt.Printf("gen-constants: Unable to create ‘build-constants.go’. Error: %s.\n", e)
os.Exit(1)
}
defer constantsFile.Close()
e = t.Execute(constantsFile, struct {
Version string
ReleaseTag string
CommitID string
}{version, releaseTag(version), commitID()})
if e != nil {
fmt.Printf("gen-constants: Unable to generate ‘build-constants.go’. Error: %s.\n", e)
os.Exit(1)
}
}
// genReleaseTag prints release tag to the console for easy git tagging.
func releaseTag(version string) string {
relPrefix := "UNOFFICIAL"
if prefix := os.Getenv("MINIO_RELEASE"); prefix != "" {
relPrefix = prefix
}
relTag := strings.Replace(version, " ", "-", -1)
relTag = strings.Replace(relTag, ":", "-", -1)
relTag = strings.Replace(relTag, ",", "", -1)
return relPrefix + "." + relTag
}
// commitID returns the abbreviated commit-id hash of the last commit.
func commitID() string {
// git log --format="%h" -n1
var (
commit []byte
e error
)
cmdName := "git"
cmdArgs := []string{"log", "--format=%H", "-n1"}
if commit, e = exec.Command(cmdName, cmdArgs...).Output(); e != nil {
fmt.Fprintln(os.Stderr, "Error generating git commit-id: ", e)
os.Exit(1)
}
return strings.TrimSpace(string(commit))
}
func main() {
// Version is in HTTP TimeFormat.
version := time.Now().UTC().Format(http.TimeFormat)
// generate ‘build-constants.go’ file.
genConstants(version)
fmt.Println("Version: \"" + version + "\"")
fmt.Println("Release-Tag: " + releaseTag(version))
fmt.Println("Commit-ID: " + commitID())
}