ci: Fix parse GitLab pipeline url

When the namespace have a dash, this method cannot recogniza properly
the fields in a url. Better to use a regular expression quickly defining
the fields. The exception raised, when the pattern is not recognized
would help more the handler.

Signed-off-by: Sergi Blanch Torne <sergi.blanch.torne@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29683>

bin/ci/gitlab_common.py

@@ -43,15 +43,19 @@ def pretty_duration(seconds):
     return f"{seconds:0.0f}s"
 
 
-def get_gitlab_pipeline_from_url(gl, pipeline_url):
-    assert pipeline_url.startswith(GITLAB_URL)
-    url_path = pipeline_url[len(GITLAB_URL) :]
-    url_path_components = url_path.split("/")
-    project_name = "/".join(url_path_components[1:3])
-    assert url_path_components[3] == "-"
-    assert url_path_components[4] == "pipelines"
-    pipeline_id = int(url_path_components[5])
-    cur_project = gl.projects.get(project_name)
+def get_gitlab_pipeline_from_url(gl, pipeline_url) -> tuple:
+    """
+    Extract the project and pipeline object from the url string
+    :param gl: Gitlab object
+    :param pipeline_url: string with a url to a pipeline
+    :return: ProjectPipeline, Project objects
+    """
+    pattern = rf"^{GITLAB_URL}/(.*)/-/pipelines/([0-9]+)$"
+    match = re.match(pattern, pipeline_url)
+    if not match:
+        raise AssertionError(f"url {pipeline_url} doesn't follow the pattern {pattern}")
+    namespace_with_project, pipeline_id = match.groups()
+    cur_project = gl.projects.get(namespace_with_project)
     pipe = cur_project.pipelines.get(pipeline_id)
     return pipe, cur_project