Add provider Makefile release targets and signing

* Add Terraform provider Makefile release targets to produce
zip files, checksums, and signatures
* Add linux-arm64 to the release list

Author: dghubble

Makefile

@@ -3,6 +3,7 @@ export GO111MODULE=on
 export GOFLAGS=-mod=vendor
 
 VERSION=$(shell git describe --tags --match=v* --always --dirty)
+SEMVER=$(shell git describe --tags --match=v* --always --dirty | cut -c 2-)
 
 .PHONY: all
 all: build test vet lint fmt
@@ -46,8 +47,13 @@ clean:
 release: \
 	clean \
 	_output/plugin-linux-amd64.tar.gz \
+	_output/plugin-linux-arm64.tar.gz \
 	_output/plugin-darwin-amd64.tar.gz \
-	_output/plugin-windows-amd64.tar.gz
+	_output/plugin-windows-amd64.tar.gz \
+	_output/plugin-linux_amd64.zip \
+	_output/plugin-linux_arm64.zip \
+	_output/plugin-darwin_amd64.zip \
+	_output/plugin-windows_amd64.zip
 
 _output/plugin-%.tar.gz: NAME=terraform-provider-matchbox-$(VERSION)-$*
 _output/plugin-%.tar.gz: DEST=_output/$(NAME)
@@ -56,12 +62,37 @@ _output/plugin-%.tar.gz: _output/%/terraform-provider-matchbox
 	@cp _output/$*/terraform-provider-matchbox $(DEST)
 	@tar zcvf $(DEST).tar.gz -C _output $(NAME)
 
+_output/plugin-%.zip: NAME=terraform-provider-matchbox_$(SEMVER)_$*
+_output/plugin-%.zip: DEST=_output/$(NAME)
+_output/plugin-%.zip: _output/%/terraform-provider-matchbox
+	@mkdir -p $(DEST)
+	@cp _output/$*/terraform-provider-matchbox $(DEST)/terraform-provider-matchbox_$(VERSION)
+	@zip -j $(DEST).zip $(DEST)/terraform-provider-matchbox_$(VERSION)
+
 _output/linux-amd64/terraform-provider-matchbox: GOARGS = GOOS=linux GOARCH=amd64
+_output/linux-arm64/terraform-provider-matchbox: GOARGS = GOOS=linux GOARCH=arm64
 _output/darwin-amd64/terraform-provider-matchbox: GOARGS = GOOS=darwin GOARCH=amd64
 _output/windows-amd64/terraform-provider-matchbox: GOARGS = GOOS=windows GOARCH=amd64
 _output/%/terraform-provider-matchbox:
 	$(GOARGS) go build -o $@ github.com/poseidon/terraform-provider-matchbox
 
+release-sign:
+	cd _output; sha256sum *.zip > terraform-provider-matchbox_$(SEMVER)_SHA256SUMS
+	gpg2 --armor --detach-sign _output/terraform-provider-matchbox-$(VERSION)-linux-amd64.tar.gz
+	gpg2 --armor --detach-sign _output/terraform-provider-matchbox-$(VERSION)-linux-arm64.tar.gz
+	gpg2 --armor --detach-sign _output/terraform-provider-matchbox-$(VERSION)-darwin-amd64.tar.gz
+	gpg2 --armor --detach-sign _output/terraform-provider-matchbox-$(VERSION)-windows-amd64.tar.gz
+	gpg2 --detach-sign _output/terraform-provider-matchbox_$(SEMVER)_SHA256SUMS
+
+release-verify: NAME=_output/terraform-provider-matchbox
+release-verify:
+	gpg2 --verify $(NAME)-$(VERSION)-linux-amd64.tar.gz.asc $(NAME)-$(VERSION)-linux-amd64.tar.gz
+	gpg2 --verify $(NAME)-$(VERSION)-linux-arm64.tar.gz.asc $(NAME)-$(VERSION)-linux-arm64.tar.gz
+	gpg2 --verify $(NAME)-$(VERSION)-darwin-amd64.tar.gz.asc $(NAME)-$(VERSION)-darwin-amd64.tar.gz
+	gpg2 --verify $(NAME)-$(VERSION)-windows-amd64.tar.gz.asc $(NAME)-$(VERSION)-windows-amd64.tar.gz
+	gpg2 --verify $(NAME)_$(SEMVER)_SHA256SUMS.sig $(NAME)_$(SEMVER)_SHA256SUMS
+
+
 .PHONY: certificates
 certificates:
 	@openssl req -days 3650 -nodes -x509 -config matchbox/testdata/certs.ext -extensions v3_ca -newkey rsa:4096 -keyout matchbox/testdata/ca.key -out matchbox/testdata/ca.crt -subj "/CN=fake-ca"