Most ruby packages are not maintained by the Archlinux repository, I installed them locally then added
Although the ruby version is
2.1.5, it uses
2.1.0 as the library version. It feels silly if I change it manually every time, so I have to find a way to check it automatically.
Refer to this post, the output of
ruby -e 'puts $LOAD_PATH' includes what I need.
grep to find it out.
Finally I added the following line to
.zshrc and it works fine.
BTW, this script can also be used in the PKGBUILD of ruby gem packages.