Change the timestamp of a file in Ruby
This is somewhat similar to the touch command of Linux:
FileUtils.touch 'example.txt', :mtime => Time.now - 2.hours
If you omit the :mtime the modification timestamp will be set to the current time:
FileUtils.touch 'example.txt'
You may also pass an array of filenames:
FileUtils.touch %w[ foo bar baz ], :mtime => Time.now - 2.hours
Non-existent files will be created.
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