[jira] [Created] (BEAM-2338) Directory filepattern wildcard broken in python SDK

["Vilhelm von Ehrenheim (JIRA)" <ji...@apache.org>]

Vilhelm von Ehrenheim created BEAM-2338:
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             Summary: Directory filepattern wildcard broken in python SDK
                 Key: BEAM-2338
                 URL: https://issues.apache.org/jira/browse/BEAM-2338
             Project: Beam
          Issue Type: Bug
          Components: beam-model
    Affects Versions: 2.0.0
            Reporter: Vilhelm von Ehrenheim
            Assignee: Frances Perry


Validation of file patterns containing wildcard (`*`) in directories does not work if the filename is specified fully. 

Some kinds of patterns generates an error from here:
https://github.com/apache/beam/blob/v2.0.0/sdks/python/apache_beam/io/filebasedsource.py#L168

I've tried a few different FileSystems match commands which confuses be a bit.

Full path works:
{noformat}
>>> FileSystems.match(['gs://gcp-public-data-landsat/LC08/PRE/044/034/LC80440342016259LGN00/LC80440342016259LGN00_B1.TIF'], limits=[1])[0].metadata_list
[FileMetadata(gs://gcp-public-data-landsat/LC08/PRE/044/034/LC80440342016259LGN00/LC80440342016259LGN00_B1.TIF, 74721736)]
{noformat}

Glob star on directory does not
{noformat}
>>> FileSystems.match(['gs://gcp-public-data-landsat/LC08/PRE/044/034/*/LC80440342016259LGN00_B1.TIF'], limits=[1])[0].metadata_list
[]
{noformat}

If adding a star on the file level only searching for TIF files it works (all tough we match a different file but that is fine)
{noformat}
>>> FileSystems.match(['gs://gcp-public-data-landsat/LC08/PRE/044/034/*/*.TIF'], limits=[1])[0].metadata_list
[FileMetadata(gs://gcp-public-data-landsat/LC08/PRE/044/034/LC80440342013106LGN01/LC80440342013106LGN01_B1.TIF, 65862791)]
{noformat}

Ok, Here comes the even more strange case. 
Looking for the same file we found with the patterns that but with a star on the dir we find it!!
{noformat}
>>> FileSystems.match(['gs://gcp-public-data-landsat/LC08/PRE/044/034/*/LC80440342013106LGN01_B1.TIF'], limits=[1])[0].metadata_list
[FileMetadata(gs://gcp-public-data-landsat/LC08/PRE/044/034/LC80440342013106LGN01/LC80440342013106LGN01_B1.TIF, 65862791)]
{noformat}

Also looking at the first case again we will match if the star is placed late enough in the pattern to make the directory unique.

{noformat}
>>> FileSystems.match(['gs://gcp-public-data-landsat/LC08/PRE/044/034/LC80440342016259LGN*/LC80440342016259LGN00_B1.TIF'], limits=[1])[0].metadata_list
[FileMetadata(gs://gcp-public-data-landsat/LC08/PRE/044/034/LC80440342016259LGN00/LC80440342016259LGN00_B1.TIF, 74721736)]
{noformat}

but not if further up in the name

{noformat}
>>> FileSystems.match(['gs://gcp-public-data-landsat/LC08/PRE/044/034/LC8044034201*/LC80440342016259LGN00_B1.TIF'], limits=[1])[0].metadata_list
[]
{noformat}

My guess is that some folders are dropped from the list of matched directories or something. 



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