Add build info and build script

.gitignore

@@ -26,5 +26,5 @@ config.json
 # log file
 cfddns.log
 
-# linux binary name
-cfddns-go
+# build path
+release/*

main.go

@@ -11,12 +11,20 @@ import (
 	flag "github.com/spf13/pflag"
 )
 
-var conf = flag.StringP("conf", "c", "./config.json", "Config file path")
-var pLogPath = flag.StringP("log", "l", "", "Log file path")
-var onetime = flag.BoolP("onetime", "o", false, "Run just once")
-var usedns = flag.BoolP("usedns", "u", false, "Use dns to check your domain record")
-var nolog = flag.BoolP("nolog", "n", false, "Do not log to any file")
-var help = flag.BoolP("help", "h", false, "Print help")
+var (
+	buildCommit string
+	buildDate   string
+)
+
+var (
+	conf     = flag.StringP("conf", "c", "./config.json", "Config file path")
+	pLogPath = flag.StringP("log", "l", "", "Log file path")
+	onetime  = flag.BoolP("onetime", "o", false, "Run just once")
+	usedns   = flag.BoolP("usedns", "u", false, "Use dns to check your domain record")
+	nolog    = flag.BoolP("nolog", "n", false, "Do not log to any file")
+	help     = flag.BoolP("help", "h", false, "Print help")
+	version  = flag.BoolP("version", "v", false, "Print version")
+)
 
 var config Config
 
@@ -49,6 +57,11 @@ func init() {
 		os.Exit(0)
 	}
 
+	if *version {
+		fmt.Printf("CloudFlare DDns go %s, built at %s\n", buildCommit, buildDate)
+		os.Exit(0)
+	}
+
 	if *usedns {
 		getIPFunc = GetIPByDns
 	}

release/build.py

@@ -0,0 +1,37 @@
+import os
+import glob
+import subprocess
+import datetime
+
+subprocess.run("rm ./cfddns-go*", shell=True)
+
+commitId = subprocess.run("git rev-parse --short HEAD", shell=True, capture_output=True)
+commitId = commitId.stdout.decode().strip()
+
+time = datetime.datetime.utcnow().strftime('%Y-%m-%d %H:%M')
+
+t = [['linux', 'amd64'],
+     ['linux', 'arm'],
+     ['linux', 'arm64'],
+     ['linux', 'mips'],
+     ['linux', 'mipsle'],
+     ['windows', 'amd64'],
+]
+
+for o, a in t:
+    subprocess.run(
+        f'''env GOOS="{o}" GOARCH="{a}" '''
+        f'''go build -ldflags="-s -w '''
+        f'''-X main.buildCommit={commitId} -X \'main.buildDate={time}\'" '''
+        f'''-o cfddns-go_{o}_{a}{".exe" if o == "windows" else ""} '''
+        f'''../''', shell=True
+    )
+
+bins = glob.glob("cfddns-go*")
+for bin in bins:
+    if bin.endswith(".exe"):
+        subprocess.run(f"zip {bin}.zip {bin}", shell=True)
+        os.remove(bin)
+    else:
+        subprocess.run(f"gzip {bin}", shell=True)
+