Add some bash machinery so that scripts/* can be invoked from any directory successfully. Added .envrc for direnv.

[mcarifio]

First, lispx is neat, ty.

Second, no one asked me for a pull request, so cherrypick what you like or ignore it all.

Third, pre-commit unfortunately works nicely with direnv and this pull request contains .js files and .lock files I didn't intend. Maybe there's a way to remove those from the pull request, but as of this paragraph I don't know exactly how to do that. About to give that a go. But be aware you can't just blindly apply all the changes.

Finally, the real contribution is modifying scripts/* so that you can invoke them from anywhere in the project layout. Direnv adds scripts to PATH and the scripts themselves will find assets relative to BASH_SOURCE, the pathname of the running script. Bash is explicitly invoked so I use a bashism rather than $0.

[mcarifio]

I believe I've removed the offending .js and .lock files from this pull request and it can be applied in total if desired. But you have to do some mental gymnastics to get there from the history of operations above, ugh. I guess if I really knew what I was doing, I'd craft the pull request into a different branch so you could experiment with it first. My gitfu isn't that strong, but maybe yours is.

Yeah, it sucks when my "improvements" force you to do work. Sorry 'bout that. The glass is half full? Quarter maybe? Eighth? A drop? You'll love the additions, trust me. No, really.

[manuel]

Thanks for the PR. I do have some overhauls of the build process planned. I will look into your changes once that's done.

[mcarifio]

At your leisure, good follow up.