My personal fish shell config for OS X (better blue colour for directory in dark terminal). Supports git branch

config.fish

# nice light cyan color instead of dark blue
set -gx LSCOLORS gxfxcxdxbxegedabagacad

function ls --description 'List contents of directory'
  command ls -lFG $argv
end

function code --description 'Launches visual code studio in a new window'
  command code -n $argv
end

function grep --description 'Colorful grep that ignores binary file and outputs line number'
  command grep --color=always -I $argv
end

function gdeletemergedcurrent --description 'Delete all local branches that is already merged to current branch (exludes master)'
  command git branch --merged | grep -v "\*" | grep -v "master" | xargs -n 1 git branch -d
  command git remote prune origin
end

set -gx GOPATH $HOME/Go
set -gx GOROOT (go env GOROOT)
set PATH $HOME/bin $GOPATH/bin $HOME/.rbenv/shims /usr/local/bin /usr/local/sbin $PATH $GOROOT/bin ./node_modules/.bin

. $HOME/.config/fish/prompt.fish

# set -gx HOMEBREW_GITHUB_API_TOKEN #token here#

# Java
set -gx JAVA_HOME (/usr/libexec/java_home)

# Allow 256 colors in iTerm2 for pretty vim colors
set -gx CLICOLOR 1
set -gx TERM xterm-256color

prompt.fish

# use custom function instead of fish built in git prompt due to performance
# (fish git prompt uses diff which can be slow)
function git_prompt
  # uses simple grep and colrm instead of complicated sed regex
  set -l branch (git branch 2> /dev/null | grep --color=never -e '*.\(.*\)' | colrm 1 2)

  # use git status to improve performance (instead of using diff)
  # [MADRC] - if file is modified
  # ? - if untracked file exists
  set -l git_dirty (git status -s | colrm 3 | colrm 1 1 | grep --color=never -e '[MADRC]')
  set -l git_untracked (git status -s | colrm 3 | colrm 1 1 | grep --color=never -e '?')
  set -l git_stashed (git stash list | head -n 1)

  if test -n "$git_dirty"
    printf ' (%s%s' (set_color red) $branch
  else
    printf ' (%s%s' (set_color yellow) $branch
  end

  if test -n "$git_untracked"
    printf '%s*' (set_color purple)
  end

  if test -n "$git_stashed"
    printf '%s$' (set_color green)
  end

  set -l git_status_origin (git status -s -b | head -n 1)
  set -l ahead (echo $git_status_origin | grep --color=never -e '\[.*ahead.*\]')
  set -l behind (echo $git_status_origin | grep --color=never -e '\[.*behind.*\]')

  # if local repo is ahead, show up arrow
  if test -n "$ahead"
    printf '%s↑' (set_color cyan)
  end

  # if local repo is behind, show down arrow
  if test -n "$behind"
    printf '%s↓' (set_color magenta)
  end
  printf '%s)' (set_color normal)
end

function fish_prompt
  if not [ -z $VIRTUAL_ENV ]
    printf '%s(%s)%s ' (set_color -b cyan black) (basename "$VIRTUAL_ENV") (set_color normal)
  end
  printf '%s%s%s' (set_color $fish_color_cwd) (prompt_pwd) (set_color normal)

  if test -d .git
    printf '%s' (git_prompt)
  end

  printf ' ☕️  '
  set_color normal
end