Improving CLI usage

By default `make` only compiles binary for current OS.

This patch also improves error formatting of createConfig()

Makefile

@@ -4,17 +4,27 @@ SHA=$(shell git rev-parse --short HEAD)
 
 GOFILES = $(shell find . -name '*.go' -not -path './vendor/*')
 
+OS = $(shell uname)
+
 CLIPATH=github.com/circleci/circleci-cli
 
 EXECUTABLE=circleci-cli
 BUILD_DIR=build
 
-.PHONY: build/linux
+.PHONY: build
+build:
+ifeq ($(OS), Darwin)
+	GOOS=darwin GOARCH=amd64 go build -o $(BUILD_DIR)/darwin/amd64/$(EXECUTABLE)
+else ifeq ($(OS), Linux)
+	GOOS=linux GOARCH=amd64 go build -o $(BUILD_DIR)/linux/amd64/$(EXECUTABLE)
+endif
+
+.PHONY: build/*
 $(BUILD_DIR)/%/amd64/$(EXECUTABLE): $(GOFILES)
 	GOOS=$* GOARCH=amd64 CGO_ENABLED=0 go build $(LDFLAGS) -o $(BUILD_DIR)/$*/amd64/$(EXECUTABLE) .
 
-.PHONY: build
-build: $(BUILD_DIR)/darwin/amd64/$(EXECUTABLE) $(BUILD_DIR)/linux/amd64/$(EXECUTABLE)
+.PHONY: build-all
+build-all: $(BUILD_DIR)/darwin/amd64/$(EXECUTABLE) $(BUILD_DIR)/linux/amd64/$(EXECUTABLE)
 
 .PHONY: clean
 clean:
@@ -27,7 +37,7 @@ test:
 
 .PHONY: cover
 cover:
-	go test -coverprofile=coverage.txt -covermode=count ./...
+	go test -race -coverprofile=coverage.txt ./...
 
 .PHONY: lint
 lint:

cmd/root.go

@@ -118,7 +118,7 @@ func createConfig() (err error) {
 		Logger.FatalOnError("", err)
 	}
 	defer func() {
-	  Logger.FatalOnError("Error closing config file", file.Close())
+		Logger.FatalOnError("Error closing config file", file.Close())
 	}()
 
 	// read flag values
@@ -139,7 +139,7 @@ func createConfig() (err error) {
 		Logger.FatalOnError("", err)
 	}
 
-	Logger.Info("Your configuration has been created in `%v`.\n", cfgPathDefault)
+	Logger.Infof("Your configuration has been created in `%v`.\n", cfgPathDefault)
 	Logger.Infoln("It can edited manually for advanced settings.")
 	return err
 }