Cleanup on aisle vendor

[asgrim]

After discussing with @derickr a bit, everything in the PIE working directory vendor except vendor/composer/installed.json is mostly just taking up space. It isn't used as a cache for subsequent (re)installs, so it is just taking up space.

Apparently Datadog ext is very large, so this could become problematic if we don't clean up. I imagine some kind of post install cleanup step can run that removes vendor/* (except vendor/composer), could work, although I need to investigate viability and impact.

[remicollet]

Related to this, what is the goal of building in user home directory ?
Using any temporary directory will be fine (and usually temp have auto cleanup feature)

I understand composer use ~/.composer for global Installation, commands in ~/.composer/vendor/bin are usable

[asgrim]

Related to this, what is the goal of building in user home directory ?

See ThePHPF/pie-design#26 - TLDR, it will help us to auto-upgrade extension in the future, e.g. just running pie update will be able to update all the currently PIE-sourced extensions

[remicollet]

I understand the need to store some metadata (pie.json), but not the build

[asgrim]

I understand the need to store some metadata (pie.json), but not the build

That is just how Composer works - you give it the path to composer.json (although we call it pie.json to avoid confusion) and it does the lock/vendor stuff itself. The key files we actually want to keep is pie.json, pie.lock, but we also need vendor/composer/installed.json, since the latter file is the one that actually has the build metadata.