Add goreleaser

.github/workflows/goreleaser.yml

@@ -0,0 +1,21 @@
+name: goreleaser
+on:
+  push:
+    tags:
+      - v[0-9]+.[0-9]+.[0-9]+
+jobs:
+  cronplan:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-go@v4
+        with:
+          go-version: ">=1.20.5"
+      - name: Release cronplan
+        uses: goreleaser/goreleaser-action@v4
+        with:
+          distribution: goreleaser
+          version: latest
+          args: release --rm-dist
+        env:
+          GITHUB_TOKEN: ${{ secrets.GORELEASER_GITHUB_TOKEN }}

.goreleaser.yml

@@ -0,0 +1,20 @@
+before:
+  hooks:
+    - go mod tidy
+builds:
+  - main: ./cmd/jhol
+    ldflags:
+      - -X main.version={{.Version}}
+    env:
+      - CGO_ENABLED=0
+checksum:
+  name_template: "checksums.txt"
+brews:
+  - tap:
+      owner: winebarrel
+      name: homebrew-jhol
+    homepage: https://github.com/winebarrel/jhol
+    description: CLI to display and check Japanese holidays.
+    license: MIT
+    install: |
+      bin.install 'jhol'

README.md

@@ -45,3 +45,44 @@ func main() {
 	fmt.Println(holidays) //=> [2023-07-17	海の日 2023-08-11	山の日]
 }
 ```
+
+## CLI
+
+### Installation
+
+```
+brew install winebarrel/jhol/jhol
+```
+
+## Usage
+
+```
+Usage: main --api-key=STRING <command>
+
+Flags:
+  -h, --help              Show context-sensitive help.
+      --version
+      --api-key=STRING    Google API Key ($GOOGLE_API_KEY)
+      --lang="ja"         Calendar language (ja, en).
+
+Commands:
+  next --api-key=STRING [<n>]
+    Show next holidays.
+
+  is-holiday --api-key=STRING [<date>]
+    Check whether the specified date is a holiday.
+
+Run "main <command> --help" for more information on a command.
+```
+
+```
+$ export GOOGLE_API_KEY=...
+
+$ jhol next
+2023-07-17	海の日
+2023-08-11	山の日
+2023-09-18	敬老の日
+
+$ jhol is-holiday 2023-07-17
+true
+```