build: Add release builds, now generated with 'make release'

Currently supported platforms are

    - linux{amd64,arm,386}
    - winows{amd64,386}
    - darwin{amd64}

MAINTAINERS.md

@@ -34,4 +34,4 @@ $
 
 `minio` doesn't follow semantic versioning style, `minio` instead uses the release date and time as the release versions.
 
-`make release` will install new released binary into your `GOPATH`
+`make release` will generate new binary into `release` directory.

Makefile

@@ -124,6 +124,9 @@ pkg-update:
 pkg-remove:
 	@GO15VENDOREXPERIMENT=1 ${GOPATH}/bin/govendor remove $(PKG)
 
+pkg-list:
+	@GO15VENDOREXPERIMENT=1 $(GOPATH)/bin/govendor list
+
 install: gomake-all
 
 dockerimage: checkdocker verifiers $(UI_ASSETS)
@@ -134,12 +137,16 @@ dockerimage: checkdocker verifiers $(UI_ASSETS)
 	@rmdir export
 	@rm minio.dockerimage
 
-release:
-	@./release.sh
+release: verifiers
+	@MC_RELEASE=RELEASE GO15VENDOREXPERIMENT=1 ./buildscripts/build.sh
+
+experimental: verifiers
+	@MC_RELEASE=EXPERIMENTAL GO15VENDOREXPERIMENT=1 ./buildscripts/build.sh
 
 clean:
 	@echo "Cleaning up all the generated files:"
 	@rm -fv minio minio.test cover.out
 	@find . -name '*.test' | xargs rm -fv
 	@rm -rf isa-l
 	@rm -rf build
+	@rm -rf release

build-constants.go

@@ -17,8 +17,12 @@
 package main
 
 var (
-	minioVersion       = "UNOFFICIAL.GOGET"
-	minioReleaseTag    = "UNOFFICIAL.GOGET"
-	minioCommitID      = "UNOFFICIAL.GOGET"
-	minioShortCommitID = minioCommitID[:]
+	// minioVersion - version time.RFC3339.
+	minioVersion = "DEVELOPMENT.GOGET"
+	// minioReleaseTag - release tag in TAG.%Y-%m-%dT%H-%M-%SZ.
+	minioReleaseTag = "DEVELOPMENT.GOGET"
+	// minioCommitID - latest commit id.
+	minioCommitID = "DEVELOPMENT.GOGET"
+	// minioShortCommitID - first 12 characters from mcCommitID
+	minioShortCommitID = minioCommitID[:12]
 )

buildscripts/build.sh

@@ -0,0 +1,48 @@
+#!/bin/bash
+
+_init() {
+    # Save release LDFLAGS
+    LDFLAGS=$(go run buildscripts/gen-ldflags.go)
+
+    # Extract release tag
+    release_tag=$(echo $LDFLAGS | awk {'print $4'} | cut -f2 -d=)
+
+    # Verify release tag.
+    if [ -z "$release_tag" ]; then
+        echo "Release tag cannot be empty. Please check return value of \`go run buildscripts/gen-ldflags.go\`"
+        exit 1;
+    fi
+
+    # Extract release string.
+    release_str=$(echo $MC_RELEASE | tr '[:upper:]' '[:lower:]')
+
+    # Verify release string.
+    if [ -z "$release_str" ]; then
+        echo "Release string cannot be empty. Please set \`MC_RELEASE\` env variable."
+        exit 1;
+    fi
+
+    # List of supported architectures
+    SUPPORTED_OSARCH='linux/386 linux/amd64 linux/arm windows/386 windows/amd64 darwin/amd64'
+}
+
+go_build() {
+    local osarch=$1
+    os=$(echo $osarch | cut -f1 -d'/')
+    arch=$(echo $osarch | cut -f2 -d'/')
+    package=$(go list -f '{{.ImportPath}}')
+    echo -n "-->"
+    printf "%15s:%s\n" "${osarch}" "${package}"
+    GO15VENDOREXPERIMENT=1 GOOS=$os GOARCH=$arch go build --ldflags "${LDFLAGS}" -o $release_str/$os-$arch/$(basename $package).$release_tag
+}
+
+main() {
+    # Build releases.
+    echo "Executing $release_str builds for OS: ${SUPPORTED_OSARCH}"
+    for osarch in ${SUPPORTED_OSARCH}; do
+        go_build ${osarch}
+    done
+}
+
+# Run main.
+_init && main

buildscripts/gen-ldflags.go

@@ -37,7 +37,7 @@ func genLDFlags(version string) string {
 
 // genReleaseTag prints release tag to the console for easy git tagging.
 func releaseTag(version string) string {
-	relPrefix := "UNOFFICIAL"
+	relPrefix := "DEVELOPMENT"
 	if prefix := os.Getenv("MINIO_RELEASE"); prefix != "" {
 		relPrefix = prefix
 	}

update-main.go

@@ -121,8 +121,9 @@ func parseReleaseData(data string) (time.Time, *probe.Error) {
 	if releaseDateSplits[0] != "minio" {
 		return time.Time{}, probe.NewError(errors.New("Update data malformed, missing minio tag"))
 	}
-	if releaseDateSplits[1] != "OFFICIAL" {
-		return time.Time{}, probe.NewError(errors.New("Update data malformed, missing OFFICIAL tag"))
+	// "OFFICIAL" tag is still kept for backward compatibility, we should remove this for the next release.
+	if releaseDateSplits[1] != "RELEASE" && releaseDateSplits[1] != "OFFICIAL" {
+		return time.Time{}, probe.NewError(errors.New("Update data malformed, missing RELEASE tag"))
 	}
 	dateSplits := strings.SplitN(releaseDateSplits[2], "T", 2)
 	if len(dateSplits) < 2 {
@@ -145,7 +146,7 @@ func getReleaseUpdate(updateURL string) {
 	data, e := http.Get(newUpdateURL)
 	fatalIf(probe.NewError(e), "Unable to read from update URL ‘"+newUpdateURL+"’.", nil)
 
-	if minioVersion == "UNOFFICIAL.GOGET" {
+	if minioVersion == "DEVELOPMENT.GOGET" {
 		fatalIf(probe.NewError(errors.New("")),
 			"Update mechanism is not supported for ‘go get’ based binary builds.  Please download official releases from https://minio.io/#minio", nil)
 	}