Commits on Aug 25, 2024

1. Rebuild --watch event loop to simplify, fix concurrency issues …

   Before, the watcher event loop relied on multiple threads and raised an
   exception to interrupt the main thread whenever a file system change
   event happened. This was messy and resulted in zombie processes and
   other weird behavior when a file system change was detected in the
   middle of running tests.
   
   This commit refactors the implementation to use a new `EventQueue`
   class. It leverages the buffering inherent in stdin, plus uses a
   thread-safe queue for placing file system change events, and then "pops"
   the next of these in each iteration of the event loop.
   
   To avoid starting a separate thread for reading key presses, the "pop"
   operation takes turns polling stdin (peeking at its buffer to see if a
   key press happened) and blocking for short period waiting for file
   system events.
   
   The result is cleaner, easier to test, and not prone to the zombie
   process bug.

   

   mattbrictson committed Aug 25, 2024
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2. Require io/wait for older Ruby versions

   

   mattbrictson committed Aug 25, 2024
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3. Add workaround for Ruby 3.1

   

   mattbrictson committed Aug 25, 2024
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