Add autoreleaser workflow (vultr#194)

.github/workflows/releaser.yml

@@ -0,0 +1,78 @@
+name: "Automatic Releaser"
+
+on:
+  push:
+    branches:
+      - master
+
+permissions:
+  contents: write
+
+jobs:
+  check-commit:
+    runs-on: ubuntu-latest
+    outputs:
+      msg_check: ${{ steps.check-msg.outputs.match }}
+    steps:
+      - name: Check Message
+        id: check-msg
+        run: |
+          pattern="^Release v[0-9].[0-9].[0-9] #(minor|major|patch)$"
+          if [[ "${{ github.event.head_commit.message }}" =~ ${pattern} ]]; then
+              echo ::set-output name=match::true
+          fi
+  create-tag:
+    runs-on: ubuntu-latest
+    if: needs.check-commit.outputs.msg_check == 'true'
+    needs: check-commit
+    outputs:
+      new_tag: ${{ steps.tagger.outputs.new_tag }}
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: '0'
+
+    - name: Bump version and push tag
+      id: tagger
+      uses: anothrNick/[email protected]
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        WITH_V: true
+        DEFAULT_BUMP: "none"
+
+  goreleaser:
+    runs-on: ubuntu-latest
+    needs: create-tag
+    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: ${{ secrets.GITHUB_TOKEN }}
+
+  release:
+    runs-on: ubuntu-latest
+    needs: ["goreleaser", "create-tag"]
+    name: Release Notification
+    steps:
+      - run: |
+          echo "{\"text\":\"GoVultr : Release https://github.com/${{ github.repository }}/releases/tag/${{ needs.create-tag.outputs.new_tag }} \"}" > mattermost.json
+      - uses: mattermost/action-mattermost-notify@master
+        env:
+          MATTERMOST_WEBHOOK_URL: ${{ secrets.MATTERMOST_WEBHOOK_URL }}
+          MATTERMOST_USERNAME: ${{ secrets.MATTERMOST_USERNAME}}
+          MATTERMOST_ICON: ${{ secrets.MATTERMOST_ICON }}

.goreleaser.yml

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+before:
+  hooks:
+    - go mod download
+    - go generate ./...
+builds:
+ - skip: true
+
+checksum:
+  name_template: "{{ .ProjectName }}_v{{ .Version }}_checksums.txt"
+  algorithm: sha256
+
+snapshot:
+  name_template: "{{ .ProjectName }}_v{{ .Version }}"
+
+changelog:
+  sort: asc
+  filters:
+    exclude:
+      - '^docs:'
+      - '^test:'
+
+release:
+  github:
+    owner: Vultr
+    name: govultr