[RAILS] Correspondence when Ruby version does not switch in rbenv

Since the Ruby version did not switch in rbenv, it is a memo of it.


It does not change even if you switch the version with rbenv

$ rbenv versions
* 2.7.1 (set by RBENV_VERSION environment variable)
$ rbenv global 2.6.6
$ rbenv versions
* 2.7.1 (set by RBENV_VERSION environment variable)

What i did

It says set by RBENV_VERSION environment variable, but I haven't written it anywhere. Also, if you do export RBENV_VERSION = 2.6.6 in .zshrc, the version of rbenv will change well, I get an error when I try to check the version of ruby.

$ rbenv versions
* 2.6.6 (set by RBENV_VERSION environment variable) 
$ ruby -v
/Users/naoto.koyama/.rbenv/versions/2.7.1/bin/ruby: invalid option -:  (-h will show valid options) (RuntimeError)


It was caused by writing the RUBYOPT setting written in .zshrc to suppress the Ruby 2.7 warning.

$ cat ~/.zshrc
export RUBYOPT='-W:no-deprecated -W:no-experimental' # <-This is the cause

If you delete the above and then type the following command, it's OK.

$ unset RUBYOPT
$ rbenv global 2.6.6
$ rbenv versions
* 2.6.6 (set by /Users/naoto.koyama/workspace/portal/.ruby-version)
$ ruby -v
ruby 2.6.6p146 (2020-03-31 revision 67876) [x86_64-darwin20]


All ruby ​​commands in rbenv are "invalid option-: (-h will show valid options) (RuntimeError)", maybe due to RUBYOPT

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