Handle hterm preferences with better care

Godeps/_workspace/src/github.com/yudai/hcl/lex.go

@@ -0,0 +1,31 @@
+package hcl
+
+import (
+	"unicode"
+)
+
+type lexModeValue byte
+
+const (
+	lexModeUnknown lexModeValue = iota
+	lexModeHcl
+	lexModeJson
+)
+
+// lexMode returns whether we're going to be parsing in JSON
+// mode or HCL mode.
+func lexMode(v string) lexModeValue {
+	for _, r := range v {
+		if unicode.IsSpace(r) {
+			continue
+		}
+
+		if r == '{' {
+			return lexModeJson
+		} else {
+			return lexModeHcl
+		}
+	}
+
+	return lexModeHcl
+}