build time constants

Makefile

@@ -9,9 +9,9 @@ checkgopath:
 	@for miniopath in $(echo ${GOPATH} | sed 's/:/\n/g'); do if [ ! -d ${miniopath}/src/github.com/minio/minio ]; then echo "Project not found in ${miniopath}, please follow instructions provided at https://github.com/minio/minio/blob/master/CONTRIBUTING.md#setup-your-minio-github-repository" && exit 1; fi done
 
 getdeps: checkdeps checkgopath
-	@go get github.com/golang/lint/golint && echo "Installed golint:"
-	@go get golang.org/x/tools/cmd/vet && echo "Installed vet:"
-	@go get github.com/fzipp/gocyclo && echo "Installed gocyclo:"
+	@go get -u github.com/golang/lint/golint && echo "Installed golint:"
+	@go get -u golang.org/x/tools/cmd/vet && echo "Installed vet:"
+	@go get -u github.com/fzipp/gocyclo && echo "Installed gocyclo:"
 	@go get -u github.com/remyoudompheng/go-misc/deadcode && echo "Installed deadcode:"
 
 verifiers: getdeps vet fmt lint cyclo
@@ -38,8 +38,11 @@ cyclo:
 	@GO15VENDOREXPERIMENT=1 gocyclo -over 65 *.go
 	@GO15VENDOREXPERIMENT=1 gocyclo -over 65 pkg
 
-build: getdeps verifiers
-	@echo "Installing minio:" #@GO15VENDOREXPERIMENT=1 deadcode
+build: constants getdeps verifiers
+	@echo "Installing minio:"
+
+deadcode:
+	@GO15VENDOREXPERIMENT=1 deadcode
 
 test: build
 	@echo "Running all testing:"
@@ -49,13 +52,9 @@ test: build
 gomake-all: build
 	@GO15VENDOREXPERIMENT=1 go install github.com/minio/minio
 
-release: version
-	@echo "Installing minio (new version):"
-	@GO15VENDOREXPERIMENT=1 go install github.com/minio/minio
-
-version:
-	@echo "Generating new version.go"
-	@GO15VENDOREXPERIMENT=1 go run buildscripts/genversion.go
+constants:
+	@echo "Generating new build-constants.go"
+	@GO15VENDOREXPERIMENT=1 go run buildscripts/gen-constants.go
 
 pkg-add:
 	@GO15VENDOREXPERIMENT=1 govendor add $(PKG)
@@ -70,6 +69,7 @@ install: gomake-all
 
 clean:
 	@echo "Cleaning up all the generated files:"
+	@rm -fv build-constants.go
 	@rm -fv cover.out
 	@rm -fv minio
 	@rm -fv minio.test

build-constants.go

@@ -0,0 +1,14 @@
+// --------  DO NOT EDIT --------
+// This file is autogenerated by buildscripts/gen-constants.go during the release process.
+
+package main
+
+const (
+	minioVersion    = "UNOFFICIAL.GOGET"
+	minioReleaseTag = "UNOFFICIAL.GOGET"
+	minioCommitID   = "UNOFFICIAL.GOGET"
+)
+
+var (
+	minioShortCommitID = minioCommitID[:]
+)

buildscripts/gen-constants.go

@@ -0,0 +1,109 @@
+// +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())
+}

buildscripts/genversion.go

@@ -1,77 +0,0 @@
-// +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"
-	"strings"
-	"text/template"
-	"time"
-)
-
-var versionTemplate = `// --------  DO NOT EDIT --------
-// This file is autogenerated by genversion.go during the release process.
-
-package main
-
-const minioVersion = {{if .Version}}"{{.Version}}"{{else}}""{{end}}
-const minioReleaseTag = {{if .ReleaseTag}}"{{.ReleaseTag}}"{{else}}""{{end}}
-`
-
-// genVersion generates ‘version.go’.
-func genVersion(version string) {
-	t := template.Must(template.New("version").Parse(versionTemplate))
-	versionFile, err := os.OpenFile("version.go", os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0600)
-	if err != nil {
-		fmt.Printf("genversion: Unable to generate ‘version.go’. Error: %s.\n", err)
-		os.Exit(1)
-	}
-	defer versionFile.Close()
-
-	err = t.Execute(versionFile, struct {
-		Version    string
-		ReleaseTag string
-	}{version, genReleaseTag(version)})
-
-	if err != nil {
-		fmt.Printf("genversion: Unable to generate ‘version.go’. Error: %s.\n", err)
-		os.Exit(1)
-	}
-}
-
-// genReleaseTag prints release tag to the console for easy git tagging.
-func genReleaseTag(version string) string {
-	relTag := strings.Replace(version, " ", "-", -1)
-	relTag = strings.Replace(relTag, ":", "-", -1)
-	relTag = strings.Replace(relTag, ",", "", -1)
-	return "RELEASE." + relTag
-}
-
-func main() {
-	// Version is in HTTP TimeFormat.
-	version := time.Now().UTC().Format(http.TimeFormat)
-
-	// generate ‘version.go’ file.
-	genVersion(version)
-
-	fmt.Println("Version: \"" + version + "\"")
-	fmt.Println("Release-Tag: " + genReleaseTag(version))
-}

version-main.go

@@ -20,7 +20,7 @@ import "github.com/minio/cli"
 
 var versionCmd = cli.Command{
 	Name:   "version",
-	Usage:  "Print version",
+	Usage:  "Print version.",
 	Action: mainVersion,
 	CustomHelpTemplate: `NAME:
    minio {{.Name}} - {{.Usage}}
@@ -33,4 +33,5 @@ USAGE:
 func mainVersion(ctxx *cli.Context) {
 	Println("Version: " + minioVersion)
 	Println("Release-Tag: " + minioReleaseTag)
+	Println("Commit-ID: " + minioCommitID)
 }

version.go

@@ -1,7 +0,0 @@
-// --------  DO NOT EDIT --------
-// This file is autogenerated by genversion.go during the release process.
-
-package main
-
-const minioVersion = "Sun, 11 Oct 2015 06:14:24 GMT"
-const minioReleaseTag = "RELEASE.Sun-11-Oct-2015-06-14-24-GMT"