Error Description

Recently when I try to update our project Gemfile.lock, I got an gem install json errror:

Then by following the instruction of the error, I try to run:

sudo gem install json -v '2.3.0' --source 'https://rubygems.org/'

Then it appears another error 🤯

So, by reading the error description, it looks like there is some problems on my ruby settings. But when I checked, I found it is a MacOS 10.14 specific error. 🙁

It looks like some development files got moved, or stopped getting installed by some reason …

Solution

By searching how to fix it, somebody suggested to:

xcode-select --install
sudo xcodebuild -license

Although I run it, it looks like the CommandLine tools of Xcode still not get installed correctly.

Then I tried

open /Library/Developer/CommandLineTools/Packages/

It shows I don’t have this folder.

Restart the computer !!! 😡

Then, try to get into the folder again! This time successeed!!! 🤠

Follow the installation, after it is finished. Test the previous gem install json command again:

sudo gem install json -v '2.3.0' --source 'https://rubygems.org/'

TADA! Success!! 🥳

Reference

https://github.com/castwide/vscode-solargraph/issues/78