tessa.zsh-theme

# vim:ft=zsh ts=2 sw=2 sts=2
#
# agnoster's Theme - https://gist.github.com/3712874
# A Powerline-inspired theme for ZSH
#
# # README
#
# In order for this theme to render correctly, you will need a
# [Powerline-patched font](https://gist.github.com/1595572).
#
# In addition, I recommend the
# [Solarized theme](https://github.com/altercation/solarized/) and, if you're
# using it on Mac OS X, [iTerm 2](http://www.iterm2.com/) over Terminal.app -
# it has significantly better color fidelity.
#
# # Goals
#
# The aim of this theme is to only show you *relevant* information. Like most
# prompts, it will only show git information when in a git working directory.
# However, it goes a step further: everything from the current user and
# hostname to whether the last call exited with an error to whether background
# jobs are running in this shell will all be displayed automatically when
# appropriate.

### Segment drawing
# A few utility functions to make it easy and re-usable to draw segmented prompts

CURRENT_BG='NONE'
SEGMENT_SEPARATOR=''

# Begin a segment
# Takes two arguments, background and foreground. Both can be omitted,
# rendering default background/foreground.
prompt_segment() {
  local bg fg
  [[ -n $1 ]] && bg="%K{$1}" || bg="%k"
  [[ -n $2 ]] && fg="%F{$2}" || fg="%f"
  if [[ $CURRENT_BG != 'NONE' && $1 != $CURRENT_BG ]]; then
    echo -n " %{$bg%F{$CURRENT_BG}%}$SEGMENT_SEPARATOR%{$fg%} "
  else
    echo -n "%{$bg%}%{$fg%} "
  fi
  CURRENT_BG=$1
  [[ -n $3 ]] && echo -n $3
}

# End the prompt, closing any open segments
prompt_end() {
  if [[ -n $CURRENT_BG ]]; then
    echo -n " %{%k%F{$CURRENT_BG}%}$SEGMENT_SEPARATOR"
  else
    echo -n "%{%k%}"
  fi
  echo -n "%{%f%}"
  CURRENT_BG=''
}

prompt_tag() {
  if $(git rev-parse --is-inside-work-tree >/dev/null 2>&1); then
    CURRENT=$(git describe 2> /dev/null || git rev-parse --short HEAD)
    prompt_segment blue white "$(basename $CURRENT)"
  fi
}

### Prompt components
# Each component will draw itself, and hide itself if no information needs to be shown

prompt_rvm() {
  if [ -e ~/.rvm/bin/rvm-prompt ]; then
    prompt_segment red white "♢ "$(~/.rvm/bin/rvm-prompt v)
  else
    prompt_segment green white "hello"
  fi
}

# Git: branch/detached head, dirty status
prompt_git() {
  local ref dirty
  if $(git rev-parse --is-inside-work-tree >/dev/null 2>&1); then
    dirty=$(parse_git_dirty)
    ref=$(git symbolic-ref HEAD 2> /dev/null) || ref="➦ $(git show-ref --head -s --abbrev |head -n1 2> /dev/null)"
    if [[ -n $dirty ]]; then
      prompt_segment yellow white
    else
      prompt_segment green white
    fi

    setopt promptsubst
    autoload -Uz vcs_info

    zstyle ':vcs_info:*' enable git
    zstyle ':vcs_info:*' get-revision true
    zstyle ':vcs_info:*' check-for-changes true
    zstyle ':vcs_info:*' stagedstr '✚'
    zstyle ':vcs_info:git:*' unstagedstr '●'
    zstyle ':vcs_info:*' formats ' %u%c'
    zstyle ':vcs_info:*' actionformats '%u%c'
    vcs_info
    echo -n "${ref/refs\/heads\//⑂ }${}"
  fi
}

prompt_tag() {
  if $(git rev-parse --is-inside-work-tree >/dev/null 2>&1); then
    CURRENT=$(git describe 2> /dev/null || git rev-parse --short HEAD)
    prompt_segment blue white "$(basename $CURRENT)"
  fi
}


prompt_submodule() {
  if $(git rev-parse --is-inside-work-tree >/dev/null 2>&1); then
    CURRENT=$(git rev-parse --show-toplevel)
    if [[ $(pwd) == $CURRENT ]]; then
      prompt_segment white black
    else
      prompt_segment black white
    fi
    echo -n "$(basename $CURRENT)"
  fi
}

prompt_home() {
  prompt_segment blue white '⌘'
}

# Dir: current working directory
prompt_dir() {
  prompt_segment cyan white '%~'
}

# Virtualenv: current working virtualenv
prompt_virtualenv() {
  local virtualenv_path="$VIRTUAL_ENV"
  if [[ -n $virtualenv_path ]]; then
    prompt_segment blue black "(`basename $virtualenv_path`)"
  fi
}

prompt_prompt() {
  echo -n " ⮀"
}

# Status:
# - was there an error
# - am I root
# - are there background jobs?
prompt_status() {
  local symbols
  symbols=()
  [[ $RETVAL -ne 0 ]] && symbols+="%{%F{red}%}✘"
  [[ $UID -eq 0 ]] && symbols+="%{%F{yellow}%}⚡"
  [[ $(jobs -l | wc -l) -gt 0 ]] && symbols+="%{%F{cyan}%}⚙"

  [[ -n "$symbols" ]] && prompt_segment black default "$symbols"
}

## Main prompt
build_prompt() {
  RETVAL=$?
  prompt_home
  prompt_virtualenv
  prompt_dir
  prompt_submodule
  prompt_git
  prompt_tag
  prompt_end
  prompt_prompt
}

PROMPT='%{%f%b%k%}$(build_prompt) '