refactor(qa): simplify files presence testing a lot

qa_dashboard.py

@@ -21,29 +21,18 @@ for number, cube in enumerate(all_cubes):
     # deprecation warnings ?
 
     try:
-        tox_content = cube.files.get("tox.ini", ref="branch/default").decode().decode("Utf-8")
-        has_tox = True
+        cube_files = {x["name"] for x in cube.repository_tree()}
     except (gitlab.GitlabHttpError, gitlab.GitlabGetError):
-        has_tox = False
-        tox_content = None
+        # we don't care about empty repositories
+        continue
 
-    try:
-        cube.files.get(".gitlab-ci.yml", ref="branch/default")
-        has_gitlab_ci = True
-    except (gitlab.GitlabHttpError, gitlab.GitlabGetError):
-        has_gitlab_ci = False
+    has_tox = "tox.ini" in cube_files
+    has_gitlab_ci = ".gitlab-ci.yml" in cube_files
+    has_readme_rst = bool({"README.rst", "README.md"} & cube_files)  # set intersection
 
-    try:
-        cube.files.get("README.rst", ref="branch/default")
-        has_readme_rst = True
-    except (gitlab.GitlabHttpError, gitlab.GitlabGetError):
-        try:
-            cube.files.get("README.md", ref="branch/default")
-            has_readme_rst = True
-        except (gitlab.GitlabHttpError, gitlab.GitlabGetError):
-            has_readme_rst = False
+    if has_tox:
+        tox_content = cube.files.get("tox.ini", ref="branch/default").decode().decode("Utf-8")
 
-    if tox_content is not None:
         with tempfile.TemporaryDirectory() as temporary_directory_path:
             # TODO pyproject.toml
             tox_path = os.path.join(temporary_directory_path, "tox.ini")