Silent amplitude logger (#20)

* Silent amplitude logger

* cleanup makefile

Author: ivpusic

makefile

@@ -1,4 +1,4 @@
-.PHONY: all setup build lint test install
+.PHONY: all setup build run lint test
 
 VERSION        ?= $(shell git describe --tags --always --dirty 2>/dev/null | sed 's/^v//')
 COMMIT         ?= $(shell git rev-parse --short=12 HEAD 2>/dev/null || echo "unknown")
@@ -15,13 +15,11 @@ all: lint test build
 setup: bin/golangci-lint
 	go mod download
 
-dune-cli: lint
+build: lint
 	go build -ldflags '$(LDFLAGS)' -o dune-cli ./cmd
 
-build: dune-cli
-
-install:
-	go build -ldflags '$(LDFLAGS)' -o $(shell go env GOPATH)/bin/dune ./cmd
+run:
+	go run -ldflags '$(LDFLAGS)' ./cmd $(ARGS)
 
 bin:
 	mkdir -p bin

tracking/tracking.go

@@ -39,6 +39,9 @@ func New(cfg Config) *Tracker {
 	ampConfig.ServerZone = "EU"
 	ampConfig.FlushQueueSize = 1
 	ampConfig.FlushInterval = 1 * time.Second
+	if !isDevVersion(cfg.CLIVersion) {
+		ampConfig.Logger = silentLogger{}
+	}
 
 	return &Tracker{
 		client:  amplitude.NewClient(ampConfig),
@@ -76,6 +79,19 @@ func (t *Tracker) Shutdown() {
 	}
 }
 
+// isDevVersion returns true for local / non-release builds.
+func isDevVersion(v string) bool {
+	return v == "" || v == "dev"
+}
+
+// silentLogger suppresses all amplitude SDK log output.
+type silentLogger struct{}
+
+func (silentLogger) Debugf(string, ...interface{}) {}
+func (silentLogger) Infof(string, ...interface{})  {}
+func (silentLogger) Warnf(string, ...interface{})  {}
+func (silentLogger) Errorf(string, ...interface{}) {}
+
 const (
 	anonIDFile   = "anonymous_id"
 	anonFallback = "anonymous"