composer.json install-path for custom module hosted externally?

[justinlevi]

How can we specify another installer-path for custom modules, that reside in an external private repository, so that the module will get installed in a custom directory?

  "extra": {
    "installer-paths": {
      "docroot/core":                     ["type:drupal-core"],
      "docroot/modules/contrib/{$name}":  ["type:drupal-module"],
      "docroot/profiles/contrib/{$name}": ["type:drupal-profile"],
      "docroot/themes/contrib/{$name}":   ["type:drupal-theme"],
      "drush/contrib/{$name}":            ["type:drupal-drush"]
    },

Something like this would be helpful I think:
"docroot/modules/custom/{$name}": ["type:drupal-custom-modules"],

Update:
Doing some googling I found that you can do the following:

{
    "extra": {
        "installer-paths": {
            "sites/example.com/modules/{$name}": ["vendor/package"]
        }
    }
}

Haven't had a chance to try this yet but looks promising.I'd be happy to add something to one of the readme files. Any ideas where info like this should go?

source: https://getcomposer.org/doc/faqs/how-do-i-install-a-package-to-a-custom-path-for-my-framework.md

[grasmash]

The listed package types drupal-core,drupal-module, etc are all registered in https://github.com/composer/installers. This is what allows them to be mapped to specific installation paths.

I think that the example snippet you listed would actually map all packages to "sites/example.com/modules/{$name}" which would cause a lot of problems.

If you'd like to specify an install location for a custom module, you may be able to use https://github.com/mnsami/composer-custom-directory-installer. I haven't tried it myself, but I believe that you can create a composer.json in your custom module, define the type as composer, and then use this library to map the specific package to a specific directory.

[justinlevi]

Sorry, I didn't mean to use that path directly in my example I was thinking more of something like this:

"docroot/modules/custom/{$name}": [ "drupal/MY_CUSTOM_MODULE"],

thanks for the tip, I'll check that out.