add version command

Author: C1258882 Werberson Pereira da Silva

.dockerignore

@@ -0,0 +1,63 @@
+# Created by .ignore support plugin (hsz.mobi)
+### VisualStudioCode template
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+### Go template
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, build with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+### macOS template
+# General
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+### Example user template template
+### Example user template
+
+# IntelliJ project files
+.idea
+*.iml
+out
+gen
+
+# Dcoker
+.dockerignore
+Dockerfile
+
+# Environments
+.env
+

Dockerfile

@@ -3,38 +3,27 @@ FROM golang:1.11-alpine as builder
 
 RUN apk add --no-cache git mercurial 
 
-ENV BUILD_PATH=$GOPATH/src/github.com/labbsr0x/bindman-dns-bind9/src
+ENV p $GOPATH/src/github.com/labbsr0x/bindman-dns-bind9
 
-RUN mkdir -p ${BUILD_PATH}
-WORKDIR ${BUILD_PATH}
-
-ADD ./src ./
+ADD ./ ${p}
+WORKDIR ${p}
 RUN go get -v ./...
 
-WORKDIR ${BUILD_PATH}/cmd
-RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -ldflags '-extldflags "-static"' -o /manager .
+RUN GIT_COMMIT=$(git rev-parse --short HEAD 2> /dev/null || true) \
+ && BUILDTIME=$(TZ=UTC date -u '+%Y-%m-%dT%H:%M:%SZ') \
+ && VERSION=$(git describe --abbrev=0 --tags 2> /dev/null || true) \
+ && CGO_ENABLED=0 GOOS=linux go build --ldflags "-s -w \
+    -X github.com/labbsr0x/bindman-dns-bind9/src/version.Version=${VERSION:-unknow-version} \
+    -X github.com/labbsr0x/bindman-dns-bind9/src/version.GitCommit=${GIT_COMMIT} \
+    -X github.com/labbsr0x/bindman-dns-bind9/src/version.BuildTime=${BUILDTIME}" \
+    -a -installsuffix cgo -o /bindman-dns-manager src/main.go
 
 # PKG
-FROM alpine:latest
-
-RUN apk add --no-cache --update \
-  curl \
-  wget \
-  nmap \
-  bind-tools
-
-COPY --from=builder /manager /
+FROM scratch
 
 VOLUME [ "/data" ]
+COPY --from=builder /bindman-dns-manager /go/bin/
 
-EXPOSE 7070
-
-ENV BINDMAN_NAMESERVER_ADDRESS ""
-ENV BINDMAN_NAMESERVER_PORT ""
-ENV BINDMAN_NAMESERVER_KEYFILE ""
-ENV BINDMAN_NAMESERVER_ZONE ""
-ENV BINDMAN_MODE ""
-
-ENTRYPOINT [ "./manager" ]
+ENTRYPOINT [ "/go/bin/bindman-dns-manager" ]
 
 CMD [ "serve" ]

src/cmd/serve.go

@@ -4,7 +4,9 @@ import (
 	"fmt"
 	"github.com/labbsr0x/bindman-dns-bind9/src/manager"
 	"github.com/labbsr0x/bindman-dns-bind9/src/nsupdate"
+	"github.com/labbsr0x/bindman-dns-bind9/src/version"
 	"github.com/labbsr0x/bindman-dns-webhook/src/hook"
+	"github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 )
@@ -29,6 +31,12 @@ func runE(_ *cobra.Command, _ []string) error {
 	if err != nil {
 		return err
 	}
+
+	logrus.New().WithFields(logrus.Fields{
+		"Version":   version.Version,
+		"GitCommit": version.GitCommit,
+		"BuildTime": version.BuildTime,
+	}).Info("Bindman-DNS Bind9 version")
 	hook.Initialize(bind9Manager)
 	return nil
 }

src/cmd/version.go

@@ -0,0 +1,20 @@
+package cmd
+
+import (
+	"fmt"
+	"github.com/labbsr0x/bindman-dns-bind9/src/version"
+	"github.com/spf13/cobra"
+)
+
+// versionCmd represents the version command
+var versionCmd = &cobra.Command{
+	Use:   "version",
+	Short: "Display this build's version, build time, and git hash",
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Print(version.FormattedMessage())
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(versionCmd)
+}

src/version/version.go

@@ -0,0 +1,21 @@
+package version
+
+import "fmt"
+
+// Default build-time variable.
+// These values are overridden via ldflags
+var (
+	Version   = "unknown-version"
+	GitCommit = "unknown-commit"
+	BuildTime = "unknown-buildtime"
+)
+
+const versionF = `Bindman-DNS Bind9
+  Version: %s
+  GitCommit: %s
+  BuildTime: %s
+`
+
+func FormattedMessage() string {
+	return fmt.Sprintf(versionF, Version, GitCommit, BuildTime)
+}