frontend: support build-time dependencies from other storages

Fix #3446

When a Copr defines a build-time dependency on `copr://foo/bar` and the
`foo/bar` project uses Pulp storage, the repository baseurl is now generated
correctly.

frontend/coprs_frontend/coprs/repos.py

@@ -7,7 +7,9 @@
 import posixpath
 from urllib.parse import urlparse, parse_qs, urlunparse, urlencode
 import flask
+from sqlalchemy.orm.exc import NoResultFound
 from coprs import app
+from coprs.logic.coprs_logic import CoprDirsLogic
 
 
 def generate_repo_url(mock_chroot, url, arch=None):
@@ -71,10 +73,14 @@ def pre_process_repo_url(chroot, repo_url):
     if parsed_url.scheme == "copr":
         user = parsed_url.netloc
         prj = parsed_url.path.split("/")[1]
-        repo_url = "/".join([
-            flask.current_app.config["BACKEND_BASE_URL"],
-            "results", user, prj, chroot
-        ]) + "/"
+        try:
+            coprdir = CoprDirsLogic.get_by_ownername(user, prj).one()
+            repo_url = "{0}/{1}/".format(coprdir.repo_url, chroot)
+        except NoResultFound:
+            repo_url = "/".join([
+                flask.current_app.config["BACKEND_BASE_URL"],
+                "results", user, prj, chroot
+            ]) + "/"
 
     elif "priority" in query:
         query.pop("priority")

frontend/coprs_frontend/tests/test_repos.py

@@ -1,12 +1,14 @@
 from copy import deepcopy
 from unittest import mock
+import pytest
 from coprs import app
 from coprs.repos import (
     generate_repo_url,
     pre_process_repo_url,
     parse_repo_params,
 )
 from tests.coprs_test_case import CoprsTestCase
+from copr_common.enums import StorageEnum
 
 
 class TestRepos(CoprsTestCase):
@@ -84,6 +86,26 @@ def test_pre_process_repo_url(self):
             for url, exp in test_cases:
                 assert pre_process_repo_url("fedora-rawhide-x86_64", url) == exp
 
+    @pytest.mark.usefixtures("f_users", "f_coprs", "f_pr_dir", "f_db")
+    def test_pre_process_repo_url_coprdir(self):
+        """
+        Test that we generate correct URLs for CoprDirs. We use Pulp storage to
+        easily test this but this but that it only an implementation detail.
+        """
+        app.config["BACKEND_BASE_URL"] = "http://backend"
+        app.config["PULP_CONTENT_URL"] = "http://pulp"
+
+        # We set the storage to Pulp, therefore the fallback for constructing
+        # the repository URL won't be accurate anymore.
+        self.c1.storage = StorageEnum.pulp
+        self.db.session.add_all([self.c1, self.c4_dir])
+        self.db.session.commit()
+
+        assert self.c1.dirs[1].full_name == "user1/foocopr:PR"
+        url = "copr://user1/foocopr:PR"
+        expected = "http://pulp/user1/foocopr:PR/fedora-rawhide-x86_64/"
+        assert pre_process_repo_url("fedora-rawhide-x86_64", url) == expected
+
     def test_parse_repo_params(self):
         test_cases = [
             ("copr://foo/bar", {}),