命令行输入which gem时，会输出一串函数：
➜ ~ which gem
gem () {
\typeset result
(
\typeset rvmrc
rvm_rvmrc_files=("/etc/rvmrc" "$HOME/.rvmrc")
if [[ -n "${rvm_prefix:-}" ]] && ! [[ "$HOME/.rvmrc" -ef "${rvm_prefix}/.rvmrc" ]]
then
rvm_rvmrc_files+=("${rvm_prefix}/.rvmrc")
fi
for rvmrc in "${rvm_rvmrc_files[@]}"
do
[[ -s "${rvmrc}" ]] && source "${rvmrc}" || true
done
unset rvm_rvmrc_files
command gem "$@"
) || result=$?
hash -r
return ${result:-0}
}
这是由于使用zsh导致的。
使用下面的命令即可输出正确位置：
➜ ~ which -p gem
/Users/.rvm/rubies/ruby-3.0.2/bin/gem
