Catch 404 errors when accessing non-existing projects

gitlab_deps/deps.py

@@ -51,7 +51,11 @@ _from_rx = re.compile(r'^FROM\s+(\S+).*$', re.MULTILINE)
 
 
 def get_docker_deps(gl, project_path, branch_name):
-    p = gl.projects.get(project_path)
+    try:
+        p = gl.projects.get(project_path)
+    except Exception as e:
+        logging.error('error accessing project %s: %s', project_path, e)
+        return []
     try:
         f = p.files.get(file_path='Dockerfile', ref=branch_name)
         return _from_rx.findall(f.decode().decode('utf-8'))
@@ -60,7 +64,11 @@ def get_docker_deps(gl, project_path, branch_name):
 
 
 def get_explicit_deps(gl, project_path, branch_name):
-    p = gl.projects.get(project_path)
+    try:
+        p = gl.projects.get(project_path)
+    except Exception as e:
+        logging.error('error accessing project %s: %s', project_path, e)
+        return []
     try:
         f = p.files.get(file_path='.gitlab-deps', ref=branch_name)
         return f.decode().decode('utf-8').split('\n')
@@ -80,7 +88,6 @@ def docker_image_to_project(docker_image, registry_hostname):
         else:
             branch = m[5]
         return m[3], branch
-    return None, None
 
 
 _url_rx = re.compile(r'^(https?://[^/]+/)([^:]+)(:.*)?$')