chore: enable pylint check "raise-missing-from"

Enable the pylint check "raise-missing-from" and fix errors detected.

2 files changed, 6 insertions, 4 deletions

diff --git a/gitlab/config.py b/gitlab/config.py
index 337a265..2e98b59 100644
--- a/gitlab/config.py
+++ b/gitlab/config.py
@@ -56,7 +56,9 @@ def _get_config_files(
             try:
                 resolved = _resolve_file(config_file)
             except OSError as e:
-                raise GitlabConfigMissingError(f"Cannot read config from file: {e}")
+                raise GitlabConfigMissingError(
+                    f"Cannot read config from file: {e}"
+                ) from e
             resolved_files.append(resolved)
 
         return resolved_files
@@ -69,7 +71,7 @@ def _get_config_files(
     except OSError as e:
         raise GitlabConfigMissingError(
             f"Cannot read config from PYTHON_GITLAB_CFG: {e}"
-        )
+        ) from e
 
     for config_file in _DEFAULT_FILES:
         try:
diff --git a/gitlab/v4/objects/packages.py b/gitlab/v4/objects/packages.py
index 0461bdc..882cb1a 100644
--- a/gitlab/v4/objects/packages.py
+++ b/gitlab/v4/objects/packages.py
@@ -73,8 +73,8 @@ class GenericPackageManager(RESTManager):
         try:
             with open(path, "rb") as f:
                 file_data = f.read()
-        except OSError:
-            raise exc.GitlabUploadError(f"Failed to read package file {path}")
+        except OSError as e:
+            raise exc.GitlabUploadError(f"Failed to read package file {path}") from e
 
         url = f"{self._computed_path}/{package_name}/{package_version}/{file_name}"
         server_data = self.gitlab.http_put(url, post_data=file_data, raw=True, **kwargs)