Add a version command (#10)

* Add a Makefile that injects build info into the binary

* Use goreleaser and update circleci to use it

* Include a version command that prints injected build information

Author: tlkamp

.circleci/config.yml

@@ -1,8 +1,30 @@
-version: 2
+version: 2.1
+workflows:
+  main:
+    jobs:
+      - build
+      - release:
+          filters:
+            branches:
+              ignore: /.*/
+            tags:
+              only: /v[0-9]+(\.[0-9]+)*(-.*)*/
 jobs:
+  release:
+    docker:
+      - image: circleci/golang:1.13
+    steps:
+      - checkout
+      - run:
+          name: goreleaser
+          command: |
+            export Date=$(date +"%F %X")
+            export Rev=$(git rev-parse HEAD)
+            curl -sL https://git.io/goreleaser | bash
+
   build:
     docker:
-      - image: circleci/golang:1.12
+      - image: circleci/golang:1.13
 
     working_directory: /go/src/github.com/tlkamp/mockbob
     environment:

.gitignore

@@ -3,3 +3,5 @@
 !**/*.md
 !**/
 !LICENSE
+!Makefile
+!.goreleaser.yml

.goreleaser.yml

@@ -0,0 +1,32 @@
+# This is an example goreleaser.yaml file with some sane defaults.
+# Make sure to check the documentation at http://goreleaser.com
+before:
+  hooks:
+    # You may remove this if you don't use go modules.
+    - go mod download
+builds:
+- id: custom-build
+  env:
+  - CGO_ENABLED=0
+  ldflags:
+    - -X 'github.com/tlkamp/mockbob/cmd.buildDate={{.Env.Date}}'
+    - -X 'github.com/tlkamp/mockbob/cmd.versionInfo={{.Version}}'
+    - -X 'github.com/tlkamp/mockbob/cmd.gitRev={{.Env.Rev}}'
+
+archives:
+- replacements:
+    darwin: Darwin
+    linux: Linux
+    windows: Windows
+    386: i386
+    amd64: x86_64
+checksum:
+  name_template: 'checksums.txt'
+snapshot:
+  name_template: "{{ .Tag }}-next"
+changelog:
+  sort: asc
+  filters:
+    exclude:
+    - '^docs:'
+    - '^test:'

Makefile

@@ -0,0 +1,26 @@
+TAG := $(shell git describe --always --long)
+REV := $(shell git rev-parse HEAD)
+DATE := $(shell date +"%F %X")
+
+
+default: build
+
+test: export GO111MODULE = on
+test:
+	@cd .. && go install gotest.tools/gotestsum
+	@gotestsum --junitfile test-results.xml -- -covermode=count -coverprofile=count.out ./...
+	@go tool cover -func=count.out
+	@go tool cover -html=count.out -o coverage.html
+	@go clean -i gotest.tools/gotestsum
+
+build:
+	go build
+
+release:
+	@go build -ldflags="-X 'github.com/tlkamp/mockbob/cmd.versionInfo=$(TAG)' -X 'github.com/tlkamp/mockbob/cmd.gitRev=$(REV)' -X 'github.com/tlkamp/mockbob/cmd.buildDate=$(DATE)'"
+
+safe-clean:
+	@git clean -Xi
+
+clean:
+	@git clean -Xf

cmd/root.go

@@ -8,7 +8,26 @@ import (
 	"github.com/tlkamp/mockbob/internal"
 )
 
-var startCaps bool
+var (
+	versionInfo string = "No version specified"
+	gitRev      string = "No revision specified"
+	buildDate   string = "No date specified"
+
+	versionMessage string = fmt.Sprintf(`Version: %v
+Revision: %v
+Build Date: %v`, versionInfo, gitRev, buildDate)
+
+	startCaps bool
+)
+
+var versionCmd = &cobra.Command{
+	Use:   "version",
+	Short: "Display information about the version of mockbob.",
+	Long:  `Displays version information about mockbob, including information from the SCM, git.`,
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Println(versionMessage)
+	},
+}
 
 var rootCmd = &cobra.Command{
 	Use:   "mockbob [word or sentence (quoted)]",
@@ -55,4 +74,5 @@ func Execute() {
 
 func init() {
 	rootCmd.Flags().BoolVarP(&startCaps, "start-caps", "c", false, "start the text with a capital letter")
+	rootCmd.AddCommand(versionCmd)
 }