I found the supposed plagiarism and I'm not seeing it. From what I can see, it's all original code and while what you made is thoroughly useful and certainly took a lot of work, it's not exactly uncommon. You've created a very comprehensive, plugin-ready, Mac-specific bash config. Yours handles numerous cases, this person wrote their own handling a smaller set of cases that works better for them. Traceur[0] was one of the first major JavaScript transpilers. Does that mean Babel[1] is plagiarism?
[0] https://github.com/google/traceur-compiler
[1] https://babeljs.io/