[jira] [Created] (BEAM-13493) fileio calls mkdirs with basepath and not dirname(full_file_name)

["Javier Domingo Cansino (Jira)" <ji...@apache.org>]

Javier Domingo Cansino created BEAM-13493:
---------------------------------------------

             Summary: fileio calls mkdirs with basepath and not dirname(full_file_name)
                 Key: BEAM-13493
                 URL: https://issues.apache.org/jira/browse/BEAM-13493
             Project: Beam
          Issue Type: Bug
          Components: io-py-files
    Affects Versions: 2.34.0
            Reporter: Javier Domingo Cansino


When calling {{apache_beam.io.fileio.WriteToFiles}} with a {{file_naming}} argument that adds a directory to the path, the current implementation fails to write files if a {{mkdirs}} or analogous call is needed in the underlying file storage.

Example, 

{code}
apache_beam.io.fileio.WriteToFiles(
    path="some/base/dir", sink=..., destination=lambda x: "events",
    file_naming=lambda *x: "subdir/file.txt"
) 
{code}

the current fileio implementation will call {{mkdirs}} with {{some/base/dir}} instead of {{some/base/dir/subdir}}.

The bug is currently at https://github.com/apache/beam/blob/67bcf1e16e3fdf68cdea7a4b42b9c003e4b8948c/sdks/python/apache_beam/io/fileio.py#L605.

====

Personally, I would recommend changing the FileSystems interface to have `open` call `mkdirs` in storages that require root parent directory creation.



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