add ver sub-module

ver/version.go

@@ -0,0 +1,41 @@
+package ver
+
+/*
+	Support edit version relative information dynamically.
+
+	1. When you build your main project with:
+
+`go build -ldflags="-w -X 'git.wenlab.co/joe/kettle/ver.Version=$(VER)' \
+ -X 'git.wenlab.co/joe/kettle/ver.Date=$(shell date +"%Y-%m-%dT%H:%M:%S")' \
+ -X 'git.wenlab.co/joe/kettle/ver.Branch=$(shell git branch --show-current)' \
+ -X 'git.wenlab.co/joe/kettle/ver.Commit=$(shell git rev-parse HEAD)' \
+ -X 'git.wenlab.co/joe/kettle/ver.GoVersion=$(shell go version)' \
+ -X 'git.wenlab.co/joe/kettle/ver.Tag=$(shell git describe --tags --always --dirty)'"`
+
+	2. At starting of your project:
+
+	ver.PrintVersion()
+
+*/
+import (
+	"fmt"
+)
+
+var (
+	Version   = "v0.0.1"
+	Date      = "2021-01-03"
+	Branch    = "master"
+	Commit    = "commitid"
+	GoVersion = "1.17"
+	Tag       = "tag"
+)
+
+func Print() {
+	fmt.Printf(`Version: %v
+BuildDate: %v
+Branch: %v
+CommitID: %v
+Go: %v
+Tag: %v
+`, Version, Date, Branch, Commit, GoVersion, Tag)
+}