shfm
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wip file manager written in posix shell

note: likely very broken


features
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* draws in the most inefficient fashion possible. whole screen updates every key
  press. language choice limits us GREATLY here (no arrays).

* really nice escape sequence handling for keys which emit '\033[<stuff>'. Not
  based on read timeouts. Based on tracking position within sequences.

* has no dependencies other than a POSIX shell and POSIX coreutils (for printf,
  [, etc if not builtin).


todo
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- [ ] scrolling is torture.
- [ ] search
- [ ] prompts
- [ ] opener
- [ ] resize (POSIX shell winch is not asynchronous during read + SIGWINCH?)