Install

recent emacs on ubuntu

sudo add-apt-repository ppa:cassou/emacs
sudo apt-get update
sudo apt-get install emacs24 emacs24-el emacs24-common-non-dfsg

install use-package

After emacs installation and run emacs, we will have some issue with initiallizing with init.el. Do M-x package-install and install use-package. Close emacs and run again. All the package needed will be installed automatically.

Issues and solution

rvm complains my zsh version

needs to upgrade zsh. Under ubuntu apt-get install zsh is not happy version for rvm. I followed this instruction

compile zsh

wget http://sourceforge.net/projects/zsh/files/zsh/5.0.5/zsh-5.0.5.tar.bz2/download
tar xvjf download
cd zsh-5.0.5
./configure && make && sudo make install

change login shell

echo "/usr/local/bin/zsh" | sudo tee -a /etc/shells
chsh -s /usr/local/bin/zsh

shift + up in emacs

error message

<select> is undefined

situation

• (windmove-default-keybindings) added to init.el in order to use Shift+arrow_keys to move cursor around split panes
• running emacs -nw from gnome terminal
• hit S-<up> -> error

solution

In xterm set up, S-<up> is overriden to something else. S-<up> is not working as intended if I run emacs -nw from gnome terminal. Insert this to init.el

(if (equal "xterm" (tty-type))
      (define-key input-decode-map "\e[1;2A" [S-up]))

See this

pry is not really working with inf-ruby

issue

Top of the google search result of "making pry work with inf-ruby" is not really making pry work with inf-ruby. The solution suggests some tweak within init.el, however,

• (add-to-list 'inf-ruby-implementations '("pry" . "pry")) causes init.el load error. It's already implemented in the inf-ruby.el source so I don't think it's necessary to add again.

• (setq inf-ruby-default-implementation "pry") actually makes inf-ruby run the pry. However, with flaws. If pry is running with this set up and if I send the buffer/region/block, I get NameError: uninitialized constant IRB from (pry):1:in `__pry___'. Again, I looked into the inf-ruby.el source code and it looks like inf-ruby is already taking care of the pry smartly. So this set up shouldn't be added to init.el as well.

Solution

• don't add anything which is mentioned above to init.el to make pry work especially if it's installed from MELPA
• Instead, set pry as default irb by
• create ~/.irbrc if you don't have one
• add this

require 'pry'
Pry.start
exit