Add version information to built artifact when go get with go1.12

Author: vearutop

README.md

@@ -96,6 +96,11 @@ Local installation is not recommended for your CI pipeline. Only install the lin
 go get -u github.com/golangci/golangci-lint/cmd/golangci-lint
 ```
 
+With `go1.11` or later you can get a particular version
+```bash
+GO111MODULE=on go get github.com/golangci/golangci-lint/cmd/[email protected]
+```
+
 #### MacOS
 
 You can also install it on MacOS using [brew](https://brew.sh/):

README.tmpl.md

@@ -96,6 +96,11 @@ Local installation is not recommended for your CI pipeline. Only install the lin
 go get -u github.com/golangci/golangci-lint/cmd/golangci-lint
 ```
 
+With `go1.11` or later you can get a particular version
+```bash
+GO111MODULE=on go get github.com/golangci/golangci-lint/cmd/[email protected]
+```
+
 #### MacOS
 
 You can also install it on MacOS using [brew](https://brew.sh/):

cmd/golangci-lint/mod_version.go

@@ -0,0 +1,18 @@
+// +build go1.12
+
+package main
+
+import (
+	"fmt"
+	"runtime/debug"
+)
+
+func init() {
+	if info, available := debug.ReadBuildInfo(); available {
+		if date == "" && info.Main.Version != "(devel)" {
+			version = info.Main.Version
+			commit = fmt.Sprintf("(unknown, mod sum: %q)", info.Main.Sum)
+			date = "(unknown)"
+		}
+	}
+}