feat: add GoReleaser with automated version bumping (#168)

- Add .goreleaser.yml with multi-platform build config
- Create release.yaml workflow with workflow_dispatch trigger
- Support manual version input or auto-bump (patch/minor/major)
- Auto-creates and pushes git tag
- Builds release-tool binaries for linux/darwin/windows (amd64/arm64)
- Auto-generates changelog from commits
- Publishes binaries to GitHub releases

Signed-off-by: Marcin Skalski <skalskimarcin33@gmail.com>

Author: Automaat

.github/workflows/release.yaml

@@ -0,0 +1,85 @@
+name: release
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Version to release (e.g., 1.5.0). Leave empty to auto-bump patch version.'
+        required: false
+        type: string
+      bump:
+        description: 'Version bump type (only used if version is empty)'
+        required: false
+        type: choice
+        default: 'patch'
+        options:
+          - patch
+          - minor
+          - major
+
+permissions:
+  contents: write
+
+jobs:
+  create-tag:
+    runs-on: ubuntu-24.04
+    outputs:
+      tag: ${{ steps.compute-tag.outputs.tag }}
+    steps:
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+        with:
+          fetch-depth: 0
+      - id: compute-tag
+        run: |
+          if [ -n "${{ inputs.version }}" ]; then
+            TAG="v${{ inputs.version }}"
+          else
+            LATEST_TAG=$(git describe --tags --abbrev=0 2>/dev/null || echo "v0.0.0")
+            VERSION=${LATEST_TAG#v}
+
+            IFS='.' read -r MAJOR MINOR PATCH <<< "$VERSION"
+
+            case "${{ inputs.bump }}" in
+              major)
+                MAJOR=$((MAJOR + 1))
+                MINOR=0
+                PATCH=0
+                ;;
+              minor)
+                MINOR=$((MINOR + 1))
+                PATCH=0
+                ;;
+              patch)
+                PATCH=$((PATCH + 1))
+                ;;
+            esac
+
+            TAG="v${MAJOR}.${MINOR}.${PATCH}"
+          fi
+
+          echo "tag=$TAG" >> $GITHUB_OUTPUT
+          echo "Computed tag: $TAG"
+      - name: Create and push tag
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git tag -a ${{ steps.compute-tag.outputs.tag }} -m "Release ${{ steps.compute-tag.outputs.tag }}"
+          git push origin ${{ steps.compute-tag.outputs.tag }}
+
+  goreleaser:
+    needs: create-tag
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+        with:
+          fetch-depth: 0
+          ref: ${{ needs.create-tag.outputs.tag }}
+      - uses: actions/setup-go@4dc6199c7b1a012772edbd06daecab0f50c9053c # v6.1.0
+        with:
+          go-version-file: go.mod
+      - uses: goreleaser/goreleaser-action@9c156ee8a17a598857849441385a2041ef570552 # v6.3.0
+        with:
+          version: "~> v2"
+          args: release --clean
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.goreleaser.yml

@@ -0,0 +1,53 @@
+version: 2
+
+before:
+  hooks:
+    - go mod tidy
+
+builds:
+  - env:
+      - CGO_ENABLED=0
+    main: ./cmd/release-tool
+    id: release-tool
+    binary: release-tool
+    mod_timestamp: '{{ .CommitTimestamp }}'
+    flags:
+      - -trimpath
+    ldflags:
+      - '-s -w'
+    goos:
+      - linux
+      - darwin
+      - windows
+    goarch:
+      - amd64
+      - arm64
+
+archives:
+  - format: tar.gz
+    name_template: >-
+      {{ .ProjectName }}_
+      {{- 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
+        format: zip
+    files:
+      - LICENSE
+      - README.md
+
+changelog:
+  sort: asc
+  filters:
+    exclude:
+      - '^docs:'
+      - '^test:'
+      - '^ci:'
+      - '^chore:'
+
+release:
+  draft: false
+  prerelease: auto