When invoked from a shell script, `$(rbenv init -)` did not get the shell name correct. It needs to look at the `args` value from `ps`. Ref: https://github.com/yyuu/pyenv/issues/373
git --version
exec/which/whence
rbenv local
rbenv prefix system
hash -r
rbenv init
rbenv-version-file
rbenv-versions
: