view .hgtags @ 12937:6ff784de7c3a stable

util: refactor opener

- Don't call atomictempfile or nlinks() if the path is malformed
  (no basename). Let posixfile() raise IOError directly.
- atomictempfile already breaks up hardlinks, no need to poke
  at the file with nlinks() if atomictemp.
- No need to copy the file contents to break hardlinks for 'w'rite
  modes (w, wb, w+, w+b). Unlinking and recreating the file is faster.

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