[split] Move taktoa theme to oh-my-fish/theme-taktoa

https://github.com/oh-my-fish/theme-taktoa

themes/taktoa/README.md

-## taktoa
-
-A theme by taktoa
-
-#### Characteristics
-
-* Shows current git information
-* Shows hostname if you are connected via ssh
-* Show current terminal multiplexer status (screen/tmux pane name and number)
-* Arrow is a lambda
-
-![taktoa theme](http://taktoa.me/oh-my-fish/images/taktoa-screenshot.png)

themes/taktoa/fish_prompt.fish

-# name: taktoa
-# by taktoa (Remy Goldschmidt) <taktoa@gmail.com>
-# License: public domain
-
-function _git_branch_name
-  echo (command git symbolic-ref HEAD ^/dev/null | sed -e 's|^refs/heads/||')
-end
-
-function _git_status_symbol
-  set -l git_status (git status --porcelain ^/dev/null)
-  if test -n "$git_status"
-    if git status --porcelain ^/dev/null | grep '^.[^ ]' >/dev/null
-      echo '*' # dirty
-    else
-      echo '#' # all staged
-    end
-  else
-    echo    '' # clean
-  end
-end
-
-function _remote_hostname
-  echo (whoami)
-  if test -n "$SSH_CONNECTION"
-    echo " (ssh)"
-  end
-end
-
-function _get_tmux_window
-  tmux lsw | grep active | sed 's/\*.*$//g;s/: / /1' | awk '{ print $2 "-" $1 }' -
-end
-
-function _get_screen_window
-  set initial (screen -Q windows; screen -Q echo "")
-  set middle (echo $initial | sed 's/  /\n/g' | grep '\*' | sed 's/\*\$ / /g')
-  echo $middle | awk '{ print $2 "-" $1 }' -
-end
-
-function _is_multiplexed
-  set multiplexer ""
-  if test -z $TMUX
-  else
-    set multiplexer "tmux"
-  end
-  if test -z $WINDOW
-  else
-    set multiplexer "screen"
-  end
-  echo $multiplexer
-end
-
-function fish_prompt
-  set -l cyan (set_color cyan)
-  set -l brown (set_color brown)
-  set -l normal (set_color normal)
-
-  set -l arrow "λ"
-  set -l cwd (set_color $fish_color_cwd)(prompt_pwd)
-  set -l git_status (_git_status_symbol)(_git_branch_name)
-
-  if test -n "$git_status"
-    set git_status " $git_status"
-  end
-
-  set multiplexer (_is_multiplexed)
-
-  switch $multiplexer
-    case screen
-      set pane (_get_screen_window)
-    case tmux
-      set pane (_get_tmux_window)
-   end
-
-  if test -z $pane
-    set window ""
-  else
-    set window " ($pane)"
-  end
-
-  echo -n -s (_remote_hostname) ' ' $cwd $brown $window $cyan $git_status $normal ' ' $arrow ' '
-end
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