[ruby-core:71631] [Ruby trunk - Feature #11731] Make ruby gem install to user-directory by default

Issue #11731 has been updated by Alexander von Gluck.


There would be a few minor logic issues around gem looking for --install-dir + --user-directory  and erroring out... that check would need to be changed to --no-user-directory + --install-dir

This definitely would need some discussion as it has a moderate scope (which tools using gem expect system-wide installation?)

To keep compatibility in logic, gem might need to detect the root/administrator user and install system-wide by default to ensure when someone sudo gem install XXX the gem isn't *just* installed for the root user.

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Feature #11731: Make ruby gem install to user-directory by default
https://bugs.ruby-lang.org/issues/11731#change-55031

* Author: Alexander von Gluck
* Status: Open
* Priority: Normal
* Assignee: 
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Installing gem's system-wide doesn't make sense 99% of the time...

* Linux -- Need root access via sudo
* Windows -- Need administrator
* Max OS X -- Need root access via sudo
* Haiku -- /boot/system read-only

gem currently installs gems system-wide by default

Since the most common use-case is to install gems for your own
user, why doesn't gem --user-directory by default?

Tools like rvm already set this manually.

Making --user-directory default means package maintainers only
need to --no-user-directory while everyone else just gem install's



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