1 files changed, 40 insertions, 0 deletions
diff --git a/cli/js/colors.ts b/cli/js/colors.ts
new file mode 100644
index 000000000..9937bdb57
--- /dev/null
+++ b/cli/js/colors.ts
@@ -0,0 +1,40 @@
+// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+
+// TODO(kitsonk) Replace with `deno_std/colors/mod.ts` when we can load modules
+// which end in `.ts`.
+
+import { noColor } from "./deno.ts";
+
+interface Code {
+  open: string;
+  close: string;
+  regexp: RegExp;
+}
+
+const enabled = !noColor;
+
+function code(open: number, close: number): Code {
+  return {
+    open: `\x1b[${open}m`,
+    close: `\x1b[${close}m`,
+    regexp: new RegExp(`\\x1b\\[${close}m`, "g")
+  };
+}
+
+function run(str: string, code: Code): string {
+  return enabled
+    ? `${code.open}${str.replace(code.regexp, code.open)}${code.close}`
+    : str;
+}
+
+export function bold(str: string): string {
+  return run(str, code(1, 22));
+}
+
+export function yellow(str: string): string {
+  return run(str, code(33, 39));
+}
+
+export function cyan(str: string): string {
+  return run(str, code(36, 39));
+}