add basics

jeAddons/copier.py

@@ -0,0 +1,16 @@
+import subprocess
+import tempfile
+import shutil
+from pathlib import Path
+
+
+def fetch_file(repo_url: str, file_path: str, dest: Path):
+    tmp = tempfile.mkdtemp()
+
+    subprocess.check_call(["git", "clone", "--depth", "1", repo_url, tmp])
+
+    src = Path(tmp) / file_path
+    if not src.exists():
+        raise FileNotFoundError(file_path)
+
+    shutil.copy2(src, dest / src.name)