yuseok89 opened a new pull request, #73269:
URL: https://github.com/apache/airflow/pull/73269
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This PR aligns filename prefix handling with the documented behavior of the
Amazon FTP and SFTP transfer operators.
Previously, string prefixes were matched anywhere in a filename. This could
select unintended files. Renaming also replaced every occurrence of the prefix,
including occurrences later in the filename.
The updated behavior:
- Selects only filenames that start with the configured source prefix.
- Replaces only the leading source prefix when a destination prefix is
configured.
- Applies consistently to FTP-to-S3, SFTP-to-S3, S3-to-FTP, and S3-to-SFTP
transfers.
- Adds regression tests covering both file selection and prefix
replacement.
Users relying on the undocumented substring-matching behavior may observe
different file selection after this change.
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