feat: Support for changing the location of plugin scripts

[yacchi]

Summary

I would like to be able to install the tools I am creating with asdf.

I also want to provide the tool itself and the asdf plugin in the same git repository to simplify source code management.
However, since bin and lib are also used for other purposes, I would like to put the asdf plugin in a separate directory to avoid confusion.

I have tried to implement this by placing a configuration file .asdf-plugin in the root of the repository and writing the path to the asdf plugin in it.

Of course, if the .asdf-plugin file does not exist, the behavior will be the same as before.

For example, to place the script in contrib/asdf, I would configure it as follows:

.asdf-plugin

plugin_directory = contrib/asdf

$ ls contrib/asdf/bin
list-all
install
download

[yacchi]

Since I will be introducing a new configuration file, please allow me to correct or explain any parts that are not good or difficult to understand.

[jthegedus]

I'm not opposed to changing the plugins dir location, but why not make this a configuration option of the existing .asdfrc config file?

[yacchi]

@jthegedus
Thanks for the review!

Am I correct in assuming that the .asdfrc setting can enable the ability to read .asdf-plugin files?
Right now there are only plugins that do not require this functionality, so it would be better to have a setting as suggested.

I will try to add the following settings:

.asdfrc:

load_asdf_plugin_configuration = true

[yacchi]

@jthegedus
I have changed this feature to be enabled by adding use_asdf_plugin_configuration = yes to .asdfrc.
(I changed it from load_asdf_plugin_configuration because there was already a configuration item starting with use_)

I also followed to upstream.

[Stratus3D]

Sorry for the extremely late reply here. I guess I'm inclined to not merge this as it's a good amount of added complexity just to be able to place the asdf callbacks in a different directory. While I understand this will make things more convenient for @yacchi, it's not clear this is a widely needed feature. I've never had the need for this with the several plugins I've created. @asdf-vm/core thoughts?