would-reformat - automatic reformatting for emacs without being annoying

# Motivation

# Installation

- Change to the directory where you want to use **would-reformat**:
  `$ cd ~/devel/my-project`
- From that directory, call the script `install.sh` in the directory where
  you have **would-reformat** checked out:
  `you@host:~/devel/my-project $ ~/src/would-reformat/install.sh`

This will do the following:

- create the directory `~/devel/my-project/bin` if it does not exist
- create `~/devel/my-project/bin/_reformat-common.sh`,
  `~/devel/my-project/bin/do-reformat.sh`, and
  `~/devel/my-project/bin/would-reformat.sh` as symlinks to files with
  the same names in `~/src/would-reformat`.
- create `~/devel/my-project/.dir-locals.el` as a symlink to the file
  with the same name in `~/src/would-reformat`.

This should work from a checkout wherever you happen to have it.  It doesn't
need to be in `~/src`.  However, if you remove the checkout, then the symlinks
will break, so don't do that.  If you rename the checkout, the symlinks will break.

The directory `bin` with respect to `my-project` however is hardcoded
(enhancements here are welcome).

The script `install.sh` favors conservatism over cleverness: for example,
if it finds the file `~/devel/my-project/bin/do-reformat.sh` then it
checks whether it is a symlink to `~/src/would-reformat/do-reformat.sh`.
If it is not, then it just prints a warning rather than attempting to correct
the situation.

# Troubleshooting

## Running prettier is slow

The scripts by default call `npx prettier` with some arguments.  If you call
these scripts from a directory where there's a `node_modules/` directory with
prettier and plugins, if necessary, installed, then `npx` should be fast
enough.

The solution, therefore, seems to be to say `yarn add --dev prettier` (or
`npm install --dev prettier`) in the right place.

(This seems to work for me, but it is admittedly still uncomfortably
cargoculty.  There should be a more solid basis for this answer.)


# Development