- update service

- update tool

service/help.md

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+### 服务

tool/help.md

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+### 工具

tool/system/os.go

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+package system
+
+import "runtime"
+
+// IsMac 是否为Mac
+func IsMac() bool {
+	return runtime.GOOS == "darwin"
+}
+
+// IsWindows 是否为Windows
+func IsWindows() bool {
+	return runtime.GOOS == "windows"
+}
+
+// IsLinux 是否为Linux
+func IsLinux() bool {
+	return runtime.GOOS == "linux"
+}

tool/system/os_test.go

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+package system
+
+import "testing"
+
+func TestIsMac(t *testing.T) {
+	t.Log(IsMac())
+}
+
+func BenchmarkIsMac(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		IsMac()
+	}
+}
+
+func TestIsWindows(t *testing.T) {
+	t.Log(IsWindows())
+}
+
+func BenchmarkIsWindows(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		IsWindows()
+	}
+}
+
+func TestIsLinux(t *testing.T) {
+	t.Log(IsWindows())
+}
+
+func BenchmarkIsLinux(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		IsWindows()
+	}
+}