feat(utils/paths): adds getPaths

src/utils/paths.ts

@@ -0,0 +1,24 @@
+import path from 'path';
+import up from 'find-up';
+
+export default async function getPaths(
+  ...directories: string[]
+): Promise<string[]> {
+  const all = await Promise.all(directories.map(each));
+
+  const a: string[] = [];
+  let b: string[] = [];
+  for (let bins of all) {
+    if (bins.length) {
+      a.push(bins.shift() as string);
+      b = b.concat(bins);
+    }
+  }
+
+  return a.concat(b).filter((x, i, arr) => x && arr.indexOf(x) === i);
+}
+
+export async function each(directory: string): Promise<string[]> {
+  const bin = await up('node_modules/.bin', { cwd: directory });
+  return bin ? [bin].concat(await each(path.join(directory, '../'))) : [];
+}