alliasgher opened a new pull request, #898:
URL: https://github.com/apache/iceberg-go/pull/898

   Fixes #324.
   
   `mergeConf` was checking `len(resConfig.Field) == 0` before applying
   values from the YAML config file. Since `docopt` populates `resConfig`
   with default values (e.g. `Output="text"`) before `mergeConf` runs,
   the file-config was silently ignored for any option that has a docopt
   default.
   
   **Fix:** scan `os.Args` to record which flags were explicitly provided,
   then apply the file-config value only when the corresponding flag was
   absent from the command line. CLI-provided values always take
   precedence; file-config fills in everything else.
   
   **Precedence after this change:**
   1. Explicit CLI flag (highest)
   2. YAML config file
   3. docopt default (lowest)


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