Add signed homebrew install

Makefile

@@ -1,19 +1,22 @@
 default:
 
-dist:
+dist-linux:
 	mkdir -p dist
 	cp etc/litestream.yml dist/litestream.yml
 	docker run --rm -v "${PWD}":/usr/src/litestream -w /usr/src/litestream -e GOOS=linux -e GOARCH=amd64 golang:1.15 go build -v -o dist/litestream ./cmd/litestream
 	tar -cz -f dist/litestream-linux-amd64.tar.gz -C dist litestream
 
-deb: dist
+dist-macos:
 ifndef LITESTREAM_VERSION
 	$(error LITESTREAM_VERSION is undefined)
 endif
-	cat etc/nfpm.yml | envsubst > dist/nfpm.yml
-	nfpm pkg --config dist/nfpm.yml --packager deb --target dist/litestream.deb 
+	mkdir -p dist
+	go build -v -ldflags "-X 'main.Version=${LITESTREAM_VERSION}'"  -o dist/litestream ./cmd/litestream
+	gon etc/gon.hcl
+	mv dist/litestream.zip dist/litestream-${LITESTREAM_VERSION}-darwin-amd64.zip
+	openssl dgst -sha256 dist/litestream-${LITESTREAM_VERSION}-darwin-amd64.zip
 
 clean:
 	rm -rf dist
 
-.PHONY: deb dist clean
+.PHONY: default dist-linux dist-macos clean

README.md

@@ -20,6 +20,16 @@ GitHub.
 
 ## Installation
 
+### Mac OS (Homebrew)
+
+To install from homebrew, first add the Litestream tap and then install:
+
+```sh
+$ brew tap benbjohnson/litestream
+$ brew install litestream
+```
+
+
 ### Linux (Debian)
 
 You can download the `.deb` file from the [Releases page][releases] page and

etc/gon.hcl

@@ -0,0 +1,15 @@
+source = ["./dist/litestream"]
+bundle_id = "com.middlemost.litestream"
+
+apple_id {
+  username = "benbjohnson@yahoo.com"
+  password = "@env:AC_PASSWORD"
+}
+
+sign {
+  application_identity = "Developer ID Application: Middlemost Systems, LLC"
+}
+
+zip {
+  output_path = "dist/litestream.zip"
+}