when-changed

                      Run a command when a file is changed


    ~ What is it?

      Tired of switching to the shell to test the changes you just made to
      your code? Starting to feel like a mindless drone, manually running
      pdflatex for the 30th time to see how your resume now looks?

      Worry not, when-changed is here to help! Whenever it sees that you have
      changed the file, when-changed runs any command you specify.

      So to generate your latex resume automatically, you can do this:

      $ when-changed CV.tex pdflatex CV.tex

      Sweetness!


    ~ What do I need?

      Python 2.6+
      watchdog


    ~ Installation

      pip install https://github.com/joh/when-changed/archive/master.zip

      # PegasusWang add color output when file changed, just see source code (Bcolor class)
      pip install https://github.com/PegasusWang/when-changed/archive/master.zip


    ~ Usage

      when-changed FILE COMMAND...
      when-changed FILE [FILE ...] -c COMMAND

    ~ Demo
      when-changed -r -v -1 . python main.py
      when-changed -r -v -1 . go run main.go
      # you can add alias
      alias whenchanged_run="when-changed -r -v -1 . "
      whenchanged_run python main.py

    ~ Video
      https://zhuanlan.zhihu.com/p/68631157