repoclosure: Use --forcearch for dnf repoclosure

DNF repoclosure requires this option when checking a repository that is
not compatible with host architecture. It seems that when it is
compatible, it works as well.

Based on how the list of architectures is generated, we know that the
main one will always be first.

Fixes: https://pagure.io/pungi/issue/1562
Signed-off-by: Lubomír Sedlář <lsedlar@redhat.com>

tests/test_repoclosure_wrapper.py

@@ -25,8 +25,14 @@ class RepoclosureWrapperTestCase(helpers.BaseTestCase):
 
     def test_multiple_arches(self):
         self.assertEqual(
-            rc.get_repoclosure_cmd(arch=["x86_64", "ppc64"]),
-            ["/usr/bin/repoclosure", "--tempcache", "--arch=x86_64", "--arch=ppc64"],
+            rc.get_repoclosure_cmd(arch=["x86_64", "i686", "noarch"]),
+            [
+                "/usr/bin/repoclosure",
+                "--tempcache",
+                "--arch=x86_64",
+                "--arch=i686",
+                "--arch=noarch",
+            ],
         )
 
     def test_full_command(self):
@@ -61,6 +67,34 @@ class RepoclosureWrapperTestCase(helpers.BaseTestCase):
             cmd[2:],
             [
                 "--arch=x86_64",
+                "--forcearch=x86_64",
+                "--repofrompath=my-repo,file:///mnt/koji/repo",
+                "--repofrompath=fedora,http://kojipkgs.fp.o/repo",
+                "--repo=my-repo",
+                "--check=my-repo",
+                "--repo=fedora",
+            ],
+        )
+
+    def test_dnf_command_with_multiple_arches(self):
+        repos = {"my-repo": "/mnt/koji/repo"}
+        lookaside = {"fedora": "http://kojipkgs.fp.o/repo"}
+
+        cmd = rc.get_repoclosure_cmd(
+            backend="dnf",
+            arch=["x86_64", "i686", "noarch"],
+            repos=repos,
+            lookaside=lookaside,
+        )
+        self.assertEqual(cmd[:2], ["dnf", "repoclosure"])
+        six.assertCountEqual(
+            self,
+            cmd[2:],
+            [
+                "--arch=x86_64",
+                "--arch=i686",
+                "--arch=noarch",
+                "--forcearch=x86_64",
                 "--repofrompath=my-repo,file:///mnt/koji/repo",
                 "--repofrompath=fedora,http://kojipkgs.fp.o/repo",
                 "--repo=my-repo",