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> One can not do this in Unix, and that's the point.

One certainly can, very easily actually: edit you shell rc file in /etc to modify your PATH based on PWD, boom - hierarchical PATH the Unix way. Don't want it system wide? Edit your shell rc in the user home directory. Want something more complex? The posix shell source code is a lot simpler than you'd think. I wanted the same fancy git repo status PS1 stuff found in bash rc scripts, but without the performance impact - and in tcsh. It only took an hour of work to integrate libgit2. I don't think it would have been as easy with cmd.exe.




In fact, you are right.

And I'm hierarchising my ~/bin :)


I personally implemented my PROMPT generation's git commit and branch checks using zsh (just shell scripting) because compiling and dealing with a divergent version of my shell is just too much of a pain given how many machines I have to deal with.


That would have been the easy way to do it, if tcsh allowed dynamically generated prompts (outside of a few stock flags). On Freebsd it makes sense to run your own packaging build server once you start running custom compiles on more than a few machines, so it is no big deal to compile once and `pkg install` everywhere you want it. I guess the downside of that is that it makes it easy to be lazy and not push upstream, which I'm pretty sure is the primary motivation for a lot of code contributions :)




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