Add goreleaser to release automatically CLI tool (#15)

* Add goreleaser to release automatically md2confl

* Update release workflow name

* Add build info by using idflags

* Add lint ignore block

Author: kentaro-m

.github/workflows/release.yml

@@ -0,0 +1,32 @@
+name: Release CLI Tool
+
+on:
+  push:
+    tags:
+      - "v[0-9]+.[0-9]+.[0-9]+"
+
+permissions:
+  contents: write
+
+jobs:
+  goreleaser:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      
+      - name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.16
+      
+      - name: Run GoReleaser
+        uses: goreleaser/goreleaser-action@v2
+        with:
+          distribution: goreleaser
+          version: latest
+          args: release --rm-dist
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.gitignore

@@ -23,3 +23,4 @@
 release/
 vendor/
 _vendor-*
+dist/

.goreleaser.yml

@@ -0,0 +1,76 @@
+before:
+  hooks:
+    - go mod tidy
+builds:
+  - env:
+      - CGO_ENABLED=0
+    goos:
+      - linux
+      - windows
+      - darwin
+    ldflags:
+      - -s -w -X github.com/kentaro-m/md2confl/cmd.version={{.Version}} -X github.com/kentaro-m/md2confl/cmd.commit={{.Commit}} -X github.com/kentaro-m/md2confl/cmd.date={{.Date}} -X github.com/kentaro-m/md2confl/cmd.builtBy=goreleaser
+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:'
+brews:
+  -
+    name: md2confl
+
+    # NOTE: make sure the url_template, the token and given repo (github or gitlab) owner and name are from the
+    # same kind. We will probably unify this in the next major version like it is done with scoop.
+
+    # GitHub/GitLab repository to push the formula to
+    # Gitea is not supported yet, but the support coming
+    tap:
+      owner: kentaro-m
+      name: homebrew-md2confl
+
+    # Template for the url which is determined by the given Token (github or gitlab)
+    url_template: "http://github.com/kentaro-m/md2confl/releases/download/{{ .Tag }}/{{ .ArtifactName }}"
+
+    # Git author used to commit to the repository.
+    # Defaults are shown.
+    commit_author:
+      name: goreleaserbot
+      email: goreleaser@carlosbecker.com
+
+    # Folder inside the repository to put the formula.
+    # Default is the root folder.
+    folder: Formula
+
+    # Your app's homepage.
+    # Default is empty.
+    homepage: "https://github.com/kentaro-m/md2confl"
+
+    # Template of your app's description.
+    # Default is empty.
+    description: "md2confl is a CLI tool to convert the markdown text to confluence wiki format."
+
+    # SPDX identifier of your app's license.
+    # Default is empty.
+    license: "MIT"
+
+    # So you can `brew test` your formula.
+    # Default is empty.
+    test: |
+      system "#{bin}/md2confl --version"
+
+    # Custom install script for brew.
+    # Default is 'bin.install "program"'.
+    install: |
+      bin.install "md2confl"

cmd/root.go

@@ -13,13 +13,16 @@ import (
 	"golang.org/x/term"
 )
 
-// Current version number
-const (
-	VERSION = "0.2.0"
+//nolint // these variables are set in build step
+var (
+	version = "dev"
+	commit  = "none"
+	date    = "unknown"
+	builtBy = "unknown"
 )
 
 var (
-	version bool
+	isShowVersion bool
 )
 
 var rootCmd = &cobra.Command{
@@ -34,8 +37,8 @@ var rootCmd = &cobra.Command{
 // Run executes md2confl command
 func Run(cmd *cobra.Command, args []string) error {
 
-	if version {
-		fmt.Fprintf(os.Stdout, "v%v\n", VERSION)
+	if isShowVersion {
+		fmt.Fprintf(os.Stdout, "v%v\n", version)
 		return nil
 	}
 
@@ -78,7 +81,7 @@ func output(input []byte) {
 
 func init() {
 	cobra.EnableCommandSorting = false
-	rootCmd.Flags().BoolVarP(&version, "version", "v", false, "Output the version number")
+	rootCmd.Flags().BoolVarP(&isShowVersion, "version", "v", false, "Output the version number")
 }
 
 // Execute runs the root Cmd