Smart gem installation

[hurricup]

From time to time we face a problem with gems installation when ruby or gem version is pretty old. This is caused by vague dependencies description and/or gem dumbness.

If you try to install rails with gem install rails you may face an error that some dependency requires ruby XXX, last compatible version is YYY, please try to install with gem install ZZZ -version YYY

Probably this is not a big deal for occasional manual installation, but a really big pain for automatic installations.
It would be nice to be able to run gem install with some --smart or --bundler option, so bundler logic would be used to resolve dependencies, not just dumb constraints checking.

Or to be able to run bundle install-gem gem_name for the same reason. Can't say which one is more appropriate here.

Or may be there is a way to do this with cli or simple code?

Also, recently met unclear issue on the macos, after sqlite3 1.5.3 release.
There are:

• sqlite3 1.5.3-ruby, with ruby >= 1.9.2 constraint
• sqlite3 1.5.3-x86_64-darwin with >= 2.6, < 3.2.DEV constraints

And on ruby 2.3 & 2.4 bundler attempts to install the last one and fails (dependency specified as gem 'sqlite3'. Probably this is caused by the old bundler version, checking this with updated --system

[deivid-rodriguez]

This is already the default behavior. The problem is that on old Rubies, the version of the gem CLI is too old and doesn't have this fix. If you run gem update --system first, gem install should resolve to the highest version that's also compatible with your current Ruby version.

[hurricup]

Wow, that's cool!!! What version this smart behavior was introduced in?

[simi]

https://github.com/rubygems/rubygems/blob/master/CHANGELOG.md#323--2020-12-22

[hurricup]

Thank you.
Hm, this is a pretty old, feels like I had issues after it, but not 100% sure. Will give it a try.