Allow empty glob

This is convenient and more flexible. See
https://github.com/anishathalye/dotbot/issues/284.

dotbot/plugins/link.py

@@ -62,8 +62,7 @@ class Link(Plugin):
             if use_glob:
                 glob_results = self._create_glob_results(path, exclude_paths)
                 if len(glob_results) == 0:
-                    self._log.warning("Globbing couldn't find anything matching " + str(path))
-                    success = False
+                    self._log.lowinfo("Globbing couldn't find anything matching " + str(path))
                     continue
                 if len(glob_results) == 1 and destination[-1] == "/":
                     self._log.error("Ambiguous action requested.")

tests/test_link.py

@@ -587,6 +587,19 @@ def test_link_glob_recursive(home, dotfiles, run_dotbot):
         assert file.read() == "cherry"
 
 
+def test_link_glob_no_match(home, dotfiles, run_dotbot):
+    """Verify that a glob with no match doesn't raise an error."""
+
+    dotfiles.makedirs("foo")
+    dotfiles.write_config(
+        [
+            {"defaults": {"link": {"glob": True, "create": True}}},
+            {"link": {"~/.config/foo": "foo/*"}},
+        ]
+    )
+    run_dotbot()
+
+
 @pytest.mark.skipif(
     "sys.platform[:5] == 'win32'",
     reason="These if commands won't run on Windows",