Github user ryan-williams commented on the pull request:
https://github.com/apache/spark/pull/2848#issuecomment-62165292
OK, I refactored a little further. Updates:
* renamed the helper function `maybeMoveFile` (instead of `moveFile`)
* introduced a second signature for `maybeMoveFile` that just takes two
`File`s
* this allowed me to bring the 3rd instance of this repeated logic in
`Utils.doFetchFile` into the fold, which helps the overall consistency /
cleanliness a lot, I think.
* incidentally, that last code path handled the `exists` vs. `delete()`
trickery differently than I was doing before; it used a boolean `var` that
recorded explicitly whether we `shouldCopy` (`true` to start, set to `false`
iff we found an identical file to exist). I decided that this way was cleaner,
per @andrewor14's and @pwendell's (earlier in this thread) suggestions, and
structured `maybeMoveFile` that way.
* folded the code path around L397 into `maybeMoveFile` as well, per
@andrewor14's last suggestion.
lmk how it looks!
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