Add GoReleaser

Use GoReleaser to build kuberlr, leverage GitHub actions for that.

.github/workflows/release.yml

@@ -0,0 +1,30 @@
+name: goreleaser
+
+on:
+  push:
+    tags:
+      - '*'
+
+jobs:
+  goreleaser:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2
+      -
+        name: Unshallow
+        run: git fetch --prune --unshallow
+      -
+        name: Set up Go
+        uses: actions/setup-go@v1
+        with:
+          go-version: 1.13.x
+      -
+        name: Run GoReleaser
+        uses: goreleaser/goreleaser-action@v1
+        with:
+          version: latest
+          args: release --rm-dist
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.gitignore

@@ -20,6 +20,9 @@
 # Main project binary
 /kuberlr
 
+# go releaser artifacts directory
+dist/
+
 # vim swap files
 *.swp
 

.goreleaser.yml

@@ -0,0 +1,32 @@
+# This is an example goreleaser.yaml file with some sane defaults.
+# Make sure to check the documentation at http://goreleaser.com
+before:
+  hooks:
+  - go mod download
+builds:
+- env:
+  - CGO_ENABLED=0
+  main: ./cmd/kuberlr
+  ldflags:
+    - -X=github.com/flavio/kuberlr/pkg/kuberlr.Version={{.Version}}
+    - -X=github.com/flavio/kuberlr/pkg/kuberlr.BuildDate={{.Date}}
+    - -X=github.com/flavio/kuberlr/pkg/kuberlr.Tag={{.Tag}}
+  goarch:
+    - amd64
+    - arm
+    - arm64
+archives:
+- format_overrides:
+  - goos: windows
+    format: zip
+  wrap_in_directory: true
+checksum:
+  name_template: 'checksums.txt'
+snapshot:
+  name_template: "{{ .Tag }}-next"
+changelog:
+  sort: asc
+  filters:
+    exclude:
+    - '^docs:'
+    - '^test:'