feat: add getFiles functions to list files in a github repo

packages/lib/package.json

@@ -39,6 +39,7 @@
     "typescript": "^3.9.3"
   },
   "dependencies": {
-    "jsonld": "^3.1.1"
+    "jsonld": "^3.1.1",
+    "node-fetch": "^2.6.0"
   }
 }

packages/lib/src/github.ts

@@ -0,0 +1,16 @@
+/* eslint-disable import/prefer-default-export */
+const fetch = require('node-fetch');
+
+const githubApi = async endpoint => {
+  return fetch(`https://api.github.com/repos/${endpoint}`).then(res =>
+    res.json()
+  );
+};
+
+const getFiles = async (user, repo, ref = 'HEAD') => {
+  const all = await githubApi(`${user}/${repo}/git/trees/${ref}?recursive=1`);
+  const files = all.tree.filter(node => node.type === 'blob');
+  return files;
+};
+
+export { getFiles };