Produce zip archives for release.

Makefile

@@ -1,4 +1,12 @@
-EXECUTABLE_NAME=vault2env
+VERSION = 0.0.1
+VERSION_INFO_FILE = ./$(PROVIDER_NAME)/version-info.go
+
+BIN_DIRECTORY   = _bin
+EXECUTABLE_NAME = vault2env
+DIST_ZIP_PREFIX = $(EXECUTABLE_NAME).v$(VERSION)
+
+REPO_BASE     = github.com/DimensionDataResearch
+REPO_ROOT     = $(REPO_BASE)/vault2env
 
 default: dev
 
@@ -7,17 +15,28 @@ fmt:
 
 clean:
 	rm -rf ./_bin
+	go clean $(REPO_ROOT)/...
 
+# Peform a development (current-platform-only) build.
 dev: fmt
 	go build -o _bin/${EXECUTABLE_NAME}
 
 build: fmt build_linux_amd64 build_darwin_amd64 build_windows_amd64
 
 build_linux_amd64:
-	GOOS=linux GOARCH=amd64 go build -o _bin/${EXECUTABLE_NAME}
+	GOOS=linux GOARCH=amd64 go build -o _bin/linux-amd64/${EXECUTABLE_NAME}
 
 build_darwin_amd64:
-	GOOS=darwin GOARCH=amd64 go build -o _bin/${EXECUTABLE_NAME}
+	GOOS=darwin GOARCH=amd64 go build -o _bin/darwin-amd64/${EXECUTABLE_NAME}
 
 build_windows_amd64:
-	GOOS=windows GOARCH=amd64 go build -o _bin/${EXECUTABLE_NAME}.exe
+	GOOS=windows GOARCH=amd64 go build -o _bin/windows-amd64/${EXECUTABLE_NAME}.exe
+
+# Produce archives for a GitHub release.
+dist: build
+	cd $(BIN_DIRECTORY)/windows-amd64 && \
+		zip -9 ../$(DIST_ZIP_PREFIX).windows-amd64.zip $(EXECUTABLE_NAME).exe
+	cd $(BIN_DIRECTORY)/linux-amd64 && \
+		zip -9 ../$(DIST_ZIP_PREFIX).linux-amd64.zip $(EXECUTABLE_NAME)
+	cd $(BIN_DIRECTORY)/darwin-amd64 && \
+		zip -9 ../$(DIST_ZIP_PREFIX)-darwin-amd64.zip $(EXECUTABLE_NAME)