api: Add an entry for pr shadow repositories to api functions.

rhodecode/api/views/pull_request_api.py

@@ -96,6 +96,9 b' def get_pull_request(request, apiuser, r'
                                          "commit_id": "<commit_id>",
                                      }
                                  },
+            "shadow":            {
+                                     "clone_url":   "<clone_url>",
+                                 },
            "author":             <user_obj>,
            "reviewers":          [
                                      ...
@@ -178,6 +181,9 b' def get_pull_requests(request, apiuser, '
                                              "commit_id": "<commit_id>",
                                          }
                                      },
+                "shadow":            {
+                                         "clone_url":   "<clone_url>",
+                                     },
                "author":             <user_obj>,
                "reviewers":          [
                                          ...

rhodecode/lib/middleware/simplevcs.py

@@ -110,6 +110,9 b' class SimpleVCS(object):'
         This will populate the attributes acl_repo_name, url_repo_name,
         vcs_repo_name and pr_id on the current instance.
         """
+        # TODO: martinb: Unify generation/suffix of clone url. It is currently
+        #       used here in the regex, in PullRequest in get_api_data() and
+        #       indirectly in routing configuration.
         # TODO: martinb: Move to class or module scope.
         # TODO: martinb: Check if we have to use re.UNICODE.
         # TODO: martinb: Check which chars are allowed for repo/group names.

rhodecode/model/db.py

@@ -3109,11 +3109,12 b' class PullRequest(Base, _PullRequestBase'
         from rhodecode.model.pull_request import PullRequestModel
         pull_request = self
         merge_status = PullRequestModel().merge_status(pull_request)
+        pull_request_url = url(
+            'pullrequest_show', repo_name=self.target_repo.repo_name,
+            pull_request_id=self.pull_request_id, qualified=True)
         data = {
             'pull_request_id': pull_request.pull_request_id,
-            'url': url('pullrequest_show', repo_name=self.target_repo.repo_name,
-                                       pull_request_id=self.pull_request_id,
-                                       qualified=True),
+            'url': pull_request_url,
             'title': pull_request.title,
             'description': pull_request.description,
             'status': pull_request.status,
@@ -3143,6 +3144,10 b' class PullRequest(Base, _PullRequestBase'
                     'commit_id': pull_request.target_ref_parts.commit_id,
                 },
             },
+            'shadow': {
+                # TODO: martinb: Unify generation/suffix of clone url.
+                'clone_url': '{}/repository'.format(pull_request_url),
+            },
             'author': pull_request.author.get_api_data(include_secrets=False,
                                                        details='basic'),
             'reviewers': [