feat(docker): Add build number.

.drone.yml

@@ -10,7 +10,7 @@ clone:
 
 pipeline:
   test:
-    image: appleboy/golang-testing
+    image: appleboy/golang-testing:1.9.2
     pull: true
     secrets: [ telegram_token, telegram_to ]
     commands:
@@ -22,28 +22,28 @@ pipeline:
       - make coverage
 
   build_linux_amd64:
-    image: appleboy/golang-testing
+    image: appleboy/golang-testing:1.9.2
     pull: true
     group: build
     commands:
       - make build_linux_amd64
 
   build_linux_i386:
-    image: appleboy/golang-testing
+    image: appleboy/golang-testing:1.9.2
     pull: true
     group: build
     commands:
       - make build_linux_i386
 
   build_linux_arm64:
-    image: appleboy/golang-testing
+    image: appleboy/golang-testing:1.9.2
     pull: true
     group: build
     commands:
       - make build_linux_arm64
 
   build_linux_arm:
-    image: appleboy/golang-testing
+    image: appleboy/golang-testing:1.9.2
     pull: true
     group: build
     commands:
@@ -58,7 +58,7 @@ pipeline:
       event: [ push, pull_request ]
 
   release:
-    image: appleboy/golang-testing
+    image: appleboy/golang-testing:1.9.2
     pull: true
     commands:
       - make release

Makefile

@@ -11,7 +11,7 @@ PACKAGES ?= $(shell go list ./... | grep -v /vendor/)
 GOFILES := $(shell find . -name "*.go" -type f -not -path "./vendor/*")
 SOURCES ?= $(shell find . -name "*.go" -type f)
 TAGS ?=
-LDFLAGS ?= -X 'main.Version=$(VERSION)'
+LDFLAGS ?= -X 'main.Version=$(VERSION)' -X 'main.BuildNum=$(DRONE_BUILD_NUMBER)'
 TMPDIR := $(shell mktemp -d 2>/dev/null || mktemp -d -t 'tempdir')
 
 ifneq ($(shell uname), Darwin)

main.go

@@ -10,14 +10,16 @@ import (
 )
 
 // Version set at compile-time
-var Version string
+var (
+	Version  string
+	BuildNum string
+)
 
 func main() {
 	app := cli.NewApp()
 	app.Name = "telegram plugin"
 	app.Usage = "telegram plugin"
 	app.Action = run
-	app.Version = Version
 	app.Flags = []cli.Flag{
 		cli.StringFlag{
 			Name:   "token",
@@ -185,6 +187,12 @@ func main() {
 		},
 	}
 
+	app.Version = Version
+
+	if BuildNum != "" {
+		app.Version = app.Version + "+" + BuildNum
+	}
+
 	if err := app.Run(os.Args); err != nil {
 		log.Println(err)
 	}