Javier Domingo Cansino created BEAM-13493:
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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.
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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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