add goreleaser github action to attach simd binary to releases (backport #738) (#765)

* add goreleaser github action to attach simd binary to releases and pre-releases (#738)

Co-authored-by: Carlos Rodriguez <crodveg@gmail.com>
(cherry picked from commit 87b058d)

* Update release.yml

Co-authored-by: Carlos Rodriguez <carlos@interchain.io>

Author: mergify[bot]

.github/workflows/release.yml

@@ -0,0 +1,28 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - 'v[0-9]+.[0-9]+.[0-9]+-?[a-z0-9]*' # Push events to matching v*, i.e. v1.0.0, v20.15.10, v3.0.0-alpha1
+
+jobs:
+  goreleaser:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2.4.0
+        with:
+          fetch-depth: 0
+
+      - uses: actions/setup-go@v2
+        with:
+          go-version: '1.15'
+          
+      - name: Release
+        uses: goreleaser/goreleaser-action@v2
+        if: startsWith(github.ref, 'refs/tags/')
+        with:
+          version: latest
+          args: release --rm-dist
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.goreleaser.yml

@@ -0,0 +1,35 @@
+before:
+  hooks:
+    - go mod tidy
+
+builds:
+  - main: ./testing/simapp/simd/main.go
+    binary: simd
+    flags:
+      - -tags=netgo ledger
+      - -mod=readonly
+    ldflags:
+      - -s -w -X github.com/cosmos/cosmos-sdk/version.Name=sim -X github.com/cosmos/cosmos-sdk/version.AppName=simd -X github.com/cosmos/cosmos-sdk/version.Version={{.Version}} -X "github.com/cosmos/cosmos-sdk/version.BuildTags=netgo,ledger" 
+    env:
+      - CGO_ENABLED=0
+    goos:
+      - linux
+      - windows
+      - darwin
+    # for goarch use defaults: 386, amd64 and arm64.
+    
+checksum:
+  name_template: SHA256SUMS-{{.Version}}.txt
+  algorithm: sha256
+
+release:
+  mode: keep-existing
+
+archives:
+  - name_template: "{{ .ProjectName }}_simd_v{{ .Version }}_{{ .Os }}_{{ .Arch }}"
+    files:
+      - LICENSE
+      - README.md
+      - RELEASES.md
+      - SECURITY.md
+      - CHANGELOG.md