ci: add goreleaser (numtide#34)

Author: zimbatm

.github/workflows/goreleaser.yml

@@ -0,0 +1,28 @@
+name: goreleaser
+on: [ push ]
+jobs:
+  goreleaser:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.15
+      - name: Import GPG key
+        id: import_gpg
+        uses: crazy-max/ghaction-import-gpg@v3
+        with:
+          gpg-private-key: ${{ secrets.GPG_PRIVATE_KEY }}
+          passphrase: ${{ secrets.GPG_PASSPHRASE }}
+      - name: Run GoReleaser
+        uses: goreleaser/goreleaser-action@v2
+        with:
+          version: "v0.144.0"
+          args: release --rm-dist
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GPG_FINGERPRINT: ${{ steps.import_gpg.outputs.fingerprint }}

.github/workflows/nix.yml

@@ -17,6 +17,7 @@ jobs:
           name: numtide
           signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
       - run: $(nix-build shell.nix) --pure /usr/bin/env HOME=$HOME golangci-lint run
+      - run: nix-build -A devshell
       - run: nix flake check
       - run: nix develop -c echo OK
       - name: Run nix flake archive

.goreleaser.yml

@@ -0,0 +1,33 @@
+# Visit https://goreleaser.com for documentation on how to customize this
+# behavior.
+before:
+  hooks:
+    - go mod download
+builds:
+  - env:
+      - CGO_ENABLED=0
+    mod_timestamp: '{{ .CommitTimestamp }}'
+    goos:
+      - darwin
+      - freebsd
+      - linux
+    goarch:
+      - '386'
+      - amd64
+      - arm
+      - arm64
+    ignore:
+      - goos: darwin
+        goarch: '386'
+signs:
+  - artifacts: checksum
+    args:
+      # if you are using this is a GitHub action or some other automated pipeline, you
+      # need to pass the batch flag to indicate its not interactive.
+      - "--batch"
+      - "--local-user"
+      - "{{ .Env.GPG_FINGERPRINT }}" # set this environment variable for your signing key
+      - "--output"
+      - "${signature}"
+      - "--detach-sign"
+      - "${artifact}"

main.go

@@ -6,6 +6,15 @@ import (
 	"github.com/numtide/devshell/cmd"
 )
 
+// These values are automatically set by `goreleaser` or can be set with
+// `go build -ldflags="-X main.version=something"` for example.
+var (
+// version = "dev"
+// commit  = "unknown"
+// date    = "unknown"
+// builtBy = "unknown"
+)
+
 func main() {
 	err := cmd.Execute()
 	if err != nil {