module: add release instructions and script

Using https://github.com/buildkite/github-release

.gitignore

@@ -2,3 +2,4 @@
 cmd/miflorad/miflorad
 cmd/munin-miflora/munin-miflora
 cmd/munin-miflora-gatt/munin-miflora-gatt
+pkg/miflorad-*

Makefile

@@ -34,6 +34,13 @@ remote-run: clean
 	scp cmd/$(RUN_COMMAND)/$(RUN_COMMAND) extzero:$(RUN_COMMAND)
 	ssh extzero "./$(RUN_COMMAND) $(RUN_OPTIONS)"
 
+.PHONY: release
+release:
+	mkdir -p pkg
+	cd cmd/miflorad && CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o "../../pkg/miflorad-$(MIFLORAD_VERSION)-linux-amd64" -ldflags="-s -w -X main.version=$(MIFLORAD_VERSION)" && cd ../..
+	cd cmd/miflorad && CGO_ENABLED=0 GOOS=linux GOARCH=arm go build -o "../../pkg/miflorad-$(MIFLORAD_VERSION)-linux-arm" -ldflags="-s -w -X main.version=$(MIFLORAD_VERSION)" && cd ../..
+	github-release "v$(MIFLORAD_VERSION)" pkg/miflorad-$(MIFLORAD_VERSION)-* --commit "master" --tag "v$(MIFLORAD_VERSION)" --prerelease --github-repository "cmur2/miflorad"
+
 .PHONY: cmd/miflorad/miflorad
 cmd/miflorad/miflorad:
 	cd cmd/miflorad && CGO_ENABLED=0 go build -buildmode=pie -ldflags "-X main.version=$(MIFLORAD_VERSION)" && cd ../..

README.md

@@ -48,3 +48,16 @@ handle = 0x0040, char properties = 0x02, char value handle = 0x0041, uuid = 0000
 
 - [https://wiki.hackerspace.pl/projects:xiaomi-flora](https://wiki.hackerspace.pl/projects:xiaomi-flora) (very nice teardown)
 - [https://github.com/open-homeautomation/miflora](https://github.com/open-homeautomation/miflora) (python library)
+
+## Doing a release
+
+Install the [github-release binary](https://github.com/buildkite/github-release) helper somewhere into your path as `github-release`.
+
+You also need a [personal access token](https://github.com/settings/tokens) for your Github account.
+
+The below will create a Github release of `miflorad` based on your current git working copy and create a matching git tag:
+
+```bash
+export GITHUB_RELEASE_ACCESS_TOKEN=my-personal-access-token
+MIFLORAD_VERSION=x.y.z make release
+```