adding envs tagging/interpolation

exec_extra/funcs_test.go

@@ -0,0 +1,27 @@
+package exec_extra
+
+import (
+	`testing`
+)
+
+type (
+	testStruct struct {
+		Foo string `cmdarg:"short=f,long=foo"`
+		Bar int    `cmdarg:"short=b,long=bar,prefer_short"`
+	}
+)
+
+func TestGetCmdFromStruct(t *testing.T) {
+
+	var err error
+	var out []string
+	var v *testStruct = &testStruct{
+		Foo: "foo",
+		Bar: 123,
+	}
+
+	if out, err = GetCmdFromStruct(v); err != nil {
+		t.Fatalf("Received error getting command from struct: %v", err)
+	}
+	t.Logf("Got command args from struct:\n%#v", out)
+}