urlutil: remove usage of `ui.expandpath` in `get_clone_path`

We want to deprecate `ui.expandpath` and simplify the code before adding more
complexity in the form of `[paths]` entry pointing to multiple url. So we inline
the relevant bits.

Differential Revision: https://phab.mercurial-scm.org/D10431

mercurial/utils/urlutil.py

@@ -530,9 +530,25 b' def get_unique_pull_path(action, repo, u'
 
 def get_clone_path(ui, source, default_branches=()):
     """return the `(origsource, path, branch)` selected as clone source"""
-    url = ui.expandpath(source)
-    path, branch = parseurl(url, default_branches)
-    return url, path, branch
+    if source is None:
+        if b'default' in ui.paths:
+            url = ui.paths[b'default'].rawloc
+        else:
+            # XXX this is the historical default behavior, but that is not
+            # great, consider breaking BC on this.
+            url = b'default'
+    else:
+        if source in ui.paths:
+            url = ui.paths[source].rawloc
+        else:
+            # Try to resolve as a local path or URI.
+            try:
+                # we pass the ui instance are warning might need to be issued
+                url = path(ui, None, rawloc=source).rawloc
+            except ValueError:
+                url = source
+    clone_path, branch = parseurl(url, default_branches)
+    return url, clone_path, branch
 
 
 def parseurl(path, branches=None):