feat: Add GitHub Actions workflow for automated releases

.github/workflows/release.yml

@@ -0,0 +1,32 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+permissions:
+  contents: write
+
+jobs:
+  goreleaser:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.26.1'
+
+      - name: Run GoReleaser
+        uses: goreleaser/goreleaser-action@v6
+        with:
+          distribution: goreleaser
+          version: latest
+          args: release --clean
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.goreleaser.yml

@@ -0,0 +1,78 @@
+version: 2
+
+before:
+  hooks:
+    - go mod tidy
+    - go generate ./...
+
+builds:
+  - id: tar-diff
+    main: ./cmd/tar-diff
+    binary: tar-diff
+    env:
+      - CGO_ENABLED=0
+    goos:
+      - linux
+      - windows
+      - darwin
+    goarch:
+      - amd64
+      - arm64
+    ldflags:
+      - -s -w
+
+  - id: tar-patch
+    main: ./cmd/tar-patch
+    binary: tar-patch
+    env:
+      - CGO_ENABLED=0
+    goos:
+      - linux
+      - windows
+      - darwin
+    goarch:
+      - amd64
+      - arm64
+    ldflags:
+      - -s -w
+
+archives:
+  - formats: ["tar.gz"]
+    name_template: >-
+      {{ .ProjectName }}_{{ .Version }}_
+      {{- title .Os }}_
+      {{- if eq .Arch "amd64" }}x86_64
+      {{- else if eq .Arch "386" }}i386
+      {{- else }}{{ .Arch }}{{ end }}
+      {{- if .Arm }}v{{ .Arm }}{{ end }}
+    format_overrides:
+      - goos: windows
+        formats: ["zip"]
+    files:
+      - README.md
+      - LICENSE
+      - file-format.md
+
+checksum:
+  name_template: 'checksums.txt'
+
+snapshot:
+  version_template: "{{ incpatch .Version }}-next"
+
+changelog:
+  sort: asc
+  filters:
+    exclude:
+      - '^docs:'
+      - '^test:'
+
+release:
+  draft: false
+  prerelease: auto
+  mode: replace
+  header: |
+    ## Release {{ .Tag }}
+
+    This release includes binaries for multiple platforms and architectures.
+  footer: |
+    **Full Changelog**: https://github.com/containers/tar-diff/compare/{{ .PreviousTag }}...{{ .Tag }}