Updating fastlane fails: signet requires Ruby version >= 2.4.0

Question

I'm unable to update fastlane.

When I execute fastlane update_fastlane I get the following error.

ERROR:  Error installing fastlane:
signet requires Ruby version >= 2.4.0.

When I execute ruby -v I get ruby 2.6.5p114 (2019-10-01 revision 67812) [x86_64-darwin18]

I'm stuck at fastlane version 2.28.3. I have tried reinstalling fastlane but I still get the same error.

What can be the cause of this issue? How can I resolve this?

Answer 1

Use this approach.

Remove fastlane from homebrew. Open terminal and run:

brew cask uninstall fastlane

Install ruby environments. Run in terminal:

brew install rbenv ruby-build
echo "" >> ~/.bash_profile
echo 'export PATH=${HOME}/homebrew/bin:${PATH}' >> ~/.bash_profile
echo 'if which rbenv > /dev/null; then eval "$(rbenv init -)"; fi' >> ~/.bash_profile
rbenv install 2.6.5
rbenv global 2.6.5
exit

Open terminal again and run:

gem install fastlane
fastlane -v

Inspiration form: https://hackernoon.com/the-only-sane-way-to-setup-fastlane-on-a-mac-4a14cb8549c8

Answer 2

I was able to install following the steps provided by gdingenen: https://github.com/fastlane/fastlane/issues/15467#issuecomment-540964272

1. Delete the .fastlane folder from the user's home folder

   rm -r -df ~/.fastlane

2. Install using gem

   sudo gem install fastlane -NV