Add automatic release with goreleaser

.circleci/config.yml

@@ -1,25 +1,24 @@
-version: 2
+defaults: &defaults
+  docker:
+    - image: golang:1.10
+  working_directory: /go/src/github.com/akupila/gitprompt
+
 jobs:
   build:
-    docker:
-      - image: golang:1.10
-    working_directory: /go/src/github.com/akupila/gitprompt
+    <<: *defaults
     steps:
       - checkout
-
       - run:
           name: Install gometalinter
           command: |
             go get github.com/alecthomas/gometalinter
             gometalinter --install
-
       - run:
           name: Run gometalinter
           environment:
             CGO_ENABLED: 0
           command: |
             gometalinter ./...
-
       - run:
           name: Test
           command: |
@@ -28,10 +27,52 @@ jobs:
             git config --global user.name "Test"
             bash scripts/test.sh
             bash <(curl -s https://codecov.io/bash) -t $CODECOV_TOKEN
-
       - run:
           name: Build
           environment:
             CGO_ENABLED: 0
           command: |
             go build -ldflags="-s -w" -o /out/gitprompt ./cmd/gitprompt
+      - persist_to_workspace:
+          root: .
+          paths: .
+  release:
+    <<: *defaults
+    steps:
+      - attach_workspace:
+          at: /go/src/github.com/akupila/gitprompt
+      - run:
+          name: Install goreleaser
+          command: |
+            go get github.com/goreleaser/goreleaser
+      - run:
+          name: Release
+          command: |
+            GOVERSION=$(go version) goreleaser
+
+workflows:
+  version: 2
+  build:
+    jobs:
+      - build:
+          filters:
+            branches:
+              only: /.*/
+            tags:
+              ignore: /^v[0-9]+(\.[0-9]+)*/
+  build-and-release:
+    jobs:
+      - build:
+          filters:
+            branches:
+              ignore: /.*/
+            tags:
+              only: /^v[0-9]+(\.[0-9]+)*/
+      - release:
+          requires:
+            - build
+          filters:
+            branches:
+              ignore: /.*/
+            tags:
+              only: /^v[0-9]+(\.[0-9]+)*/

.gitignore

@@ -1 +1,2 @@
 coverage.txt
+dist

.goreleaser.yml

@@ -0,0 +1,21 @@
+project_name: gitprompt
+builds:
+  - main: ./cmd/gitprompt
+    binary: gitprompt
+    ldflags: -s -w -X "main.version={{.Version}}" -X "main.commit={{.Commit}}" -X "main.date={{.Date}}" -X "main.goversion={{.Env.GOVERSION}}"
+    env:
+    - CGO_ENABLED=0
+archive:
+  format: tar.gz
+checksum:
+  name_template: 'checksums.txt'
+snapshot:
+  name_template: "{{ .Tag }}-next"
+changelog:
+  sort: asc
+  filters:
+    exclude:
+    - '^docs:'
+    - '^test:'
+git:
+  short_hash: true

cmd/gitprompt/gitprompt.go

@@ -2,11 +2,20 @@ package main
 
 import (
 	"flag"
+	"fmt"
 	"os"
+	"strings"
 
 	"github.com/akupila/gitprompt"
 )
 
+var (
+	version   = "dev"
+	commit    = "none"
+	date      = "unknown"
+	goversion = "unknown"
+)
+
 const defaultFormat = "#B([@b#R%h][#y ›%s][#m ↓%b][#m ↑%a][#r x%c][#g +%m][#y %u]#B)"
 
 type formatFlag struct {
@@ -34,8 +43,73 @@ func (f *formatFlag) String() string {
 
 var format formatFlag
 
+var exampleStatus = &gitprompt.GitStatus{
+	Branch:    "master",
+	Sha:       "0455b83f923a40f0b485665c44aa068bc25029f5",
+	Untracked: 1,
+	Modified:  2,
+	Staged:    3,
+	Conflicts: 4,
+	Ahead:     5,
+	Behind:    6,
+}
+
+var formatHelp = func() string {
+	return strings.TrimSpace(fmt.Sprintf(`
+Define output format.
+
+Default format is: %q
+Example result:    %s
+
+Data:
+	%%h	Current branch or SHA1
+	%%s	Number of files staged
+	%%b	Number of commits behind remote
+	%%a	Number of commits ahead of remote
+	%%c	Number of conflicts
+	%%m	Number of files modified
+	%%u	Number of untracked files
+
+Colors:
+	#k	Black
+	#r	Red
+	#g	Green
+	#y	Yellow
+	#b	Blue
+	#m	Magenta
+	#c	Cyan
+	#w	White
+	#K	Highlight Black
+	#R	Highlight Red
+	#G	Highlight Green
+	#Y	Highlight Yellow
+	#B	Highlight Blue
+	#M	Highlight Magenta
+	#C	Highlight Cyan
+	#W	Highlight White
+
+Text attributes:
+	@b	Set bold
+	@B	Clear bold
+	@f	Set faint/dim color
+	@F	Clear faint/dim color
+	@i	Set italic
+	@I	Clear italic
+`, defaultFormat, gitprompt.Print(exampleStatus, defaultFormat)))
+}
+
 func main() {
+	v := flag.Bool("version", false, "Print version inforformation.")
 	flag.Var(&format, "format", formatHelp())
 	flag.Parse()
+
+	if *v {
+		fmt.Printf("Version:    %s\n", version)
+		fmt.Printf("Commit:     %s\n", commit)
+		fmt.Printf("Build date: %s\n", date)
+		fmt.Printf("Go version: %s\n", goversion)
+		os.Exit(0)
+	}
+
 	gitprompt.Exec(format.String())
 }