Go 程序编译脚本，在编译过程中自动加入 Git Tag、Git Commit ID、利用 Git Tag 提取出来的版本信息、编译环境信息、编译时间

build-all.sh

#!/bin/bash
set -e

echo Build All

echo Build for linux
(CGO_ENABLED=0 GOOS=linux ./build.sh)

echo Build for windows
(CGO_ENABLED=0 GOOS=windows ./build.sh)

echo Build for macOS
(CGO_ENABLED=0 GOOS=darwin ./build.sh)

build.sh

#!/bin/bash
set -e

STATUS="$(git status -s | awk '{gsub(/^\s+|\s+$/, "");print}')"

DESCRIBE_TAG="$(git describe --tags 2>/dev/null)"
LATEST_TAG="$(git describe --tags --abbrev=0 2>/dev/null)"
LATEST_COMMIT="$(git rev-parse HEAD 2>/dev/null)"

if [ -n "$STATUS" ]; then
  echo "WARNING: 工作区有尚未提交的内容，版本号增加 -dev" 1>&2
  VERSION_suffix="-dev"
  COMMIT_suffix="*"
  TAG_suffix="*"
fi

if [ -z "$LATEST_COMMIT" ]; then
  COMMIT="UNKNOWN$COMMIT_suffix"
else
  COMMIT="${LATEST_COMMIT:0:8}$COMMIT_suffix"
fi

if [ -z "$DESCRIBE_TAG" ]; then
  TAG="UNKNOWN$TAG_suffix"
else
  TAG="$DESCRIBE_TAG$TAG_suffix"
fi

echo "Commit: $COMMIT, Tag: $TAG"

if [ -z "$LATEST_TAG" ] || [[ $LATEST_TAG != v* ]]; then
  echo "WARNING: 最新的 tag 不满足 vX.Y.Z 的格式，版本号会被标记为 UNKNOWN" 1>&2
  VERSION="UNKNOWN"
else
  VERSION="${LATEST_TAG:1}"
fi

if [[ $DESCRIBE_TAG != "$LATEST_TAG" ]]; then
  echo "WARNING: 在最近的 tag 版本后仍然有提交，版本号增加 -SNAPSHOT" 1>&2
  VERSION="${VERSION}-SNAPSHOT"
fi

VERSION="${VERSION}${VERSION_suffix}"

echo "Build Version $VERSION"

GOVERSION=$(go version | awk '{gsub(/^\s+|\s+$/, "");print}')

LDFLAGS="\
-X \"main.VERSION=${VERSION}\" \
-X \"main.GOVERSION=$GOVERSION\" \
-X \"main.GITCOMMIT=${COMMIT}\" \
-X \"main.GITTAG=${TAG}\" \
-X \"main.BUILDTIME=$(date +%Y-%m-%dT%H:%M:%S%z)\" \
"
OS="$(go env GOOS)"

FILENAME="out/p426-${OS}-${VERSION}"

if [ "$OS" == "windows" ]; then
  FILENAME="${FILENAME}.exe"
fi

echo "Build to $FILENAME"
go build -ldflags "-s -w ${LDFLAGS}" -o "$FILENAME" main.go
chmod 644 "$FILENAME"

main.go

package main

import (
	"fmt"
	"os"
)

var VERSION = "DEV"
var GOVERSION = "UNKNOWN"
var GITCOMMIT = "UNKNOWN*"
var GITTAG = "UNKNOWN*"
var BUILDTIME = "UNKNOWN"

func version() string {
	return fmt.Sprintf(`%s
Git commit: %s, tag: %s,
Build with %s
Build at %s`, VERSION, GITCOMMIT, GITTAG, GOVERSION, BUILDTIME)
}

func main() {
	args := os.Args

	if len(args) == 2 {
		switch args[1] {
		case "-v", "--version", "version":
			fmt.Println(version())
			os.Exit(1)
		}
	}

  // Main Code
  
	fmt.Println("Done")
}