Install with Gem on macOS Catalina

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I was trying to install Travis.rb as documented by the team. However, the location that gem tried to install to is protected by the OS. So I got an error like this:

% gem install travis
ERROR:  While executing gem ... (Gem::FilePermissionError)
    You don't have write permissions for the /Library/Ruby/Gems/2.6.0 directory.

I tried the following command but did not fully work - installation was okay, but I could not call % travis.

gem install travis --user-install

Configuration: I am using gem shipped with the OS:

% ruby -v  
ruby 2.6.3p62 (2019-04-16 revision 67580) [universal.x86_64-darwin19]
1 Answers

It is always a good idea to do user installation and avoid system things. Therefore doing...

gem install travis --user-install

... seems to be recommended way.

After that, the executable files are there, but you have to fix you PATH to run by adding your ~/.gem/ruby/2.6.0 folder to the path. See https://guides.rubygems.org/faqs/#user-install on how to do it.

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