base bash prompt

.base.theme.bash

#!/usr/bin/env bash

THEME_PROMPT_HOST='\H'

SCM_CHECK=${SCM_CHECK:=true}

SCM_THEME_PROMPT_DIRTY=' ✗'
SCM_THEME_PROMPT_CLEAN=' ✓'
SCM_THEME_PROMPT_PREFIX=' |'
SCM_THEME_PROMPT_SUFFIX='|'
SCM_THEME_BRANCH_PREFIX=''
SCM_THEME_TAG_PREFIX='tag:'
SCM_THEME_COMMIT_PREFIX='commit:'
SCM_THEME_REMOTE_PREFIX=''

SCM_GIT_SHOW_DETAILS=${SCM_GIT_SHOW_DETAILS:=true}

SCM_GIT='git'
SCM_GIT_CHAR='±'
SCM_GIT_AHEAD_CHAR="↑"
SCM_GIT_BEHIND_CHAR="↓"
SCM_GIT_UNTRACKED_CHAR="?:"
SCM_GIT_UNSTAGED_CHAR="U:"
SCM_GIT_STAGED_CHAR="S:"

SCM_HG='hg'
SCM_HG_CHAR='☿'

SCM_SVN='svn'
SCM_SVN_CHAR='⑆'

SCM_NONE='NONE'
SCM_NONE_CHAR='○'

RVM_THEME_PROMPT_PREFIX=' |'
RVM_THEME_PROMPT_SUFFIX='|'

VIRTUALENV_THEME_PROMPT_PREFIX=' |'
VIRTUALENV_THEME_PROMPT_SUFFIX='|'

RBENV_THEME_PROMPT_PREFIX=' |'
RBENV_THEME_PROMPT_SUFFIX='|'

function scm {
  if [[ "$SCM_CHECK" = false ]]; then SCM=$SCM_NONE
  elif [[ -f .git/HEAD ]]; then SCM=$SCM_GIT
  elif which git &> /dev/null && [[ -n "$(git symbolic-ref HEAD 2> /dev/null)" ]]; then SCM=$SCM_GIT
  elif [[ -d .hg ]]; then SCM=$SCM_HG
  elif which hg &> /dev/null && [[ -n "$(hg root 2> /dev/null)" ]]; then SCM=$SCM_HG
  elif [[ -d .svn ]]; then SCM=$SCM_SVN
  else SCM=$SCM_NONE
  fi
}

function scm_prompt_char {
  if [[ -z $SCM ]]; then scm; fi
  if [[ $SCM == $SCM_GIT ]]; then SCM_CHAR=$SCM_GIT_CHAR
  elif [[ $SCM == $SCM_HG ]]; then SCM_CHAR=$SCM_HG_CHAR
  elif [[ $SCM == $SCM_SVN ]]; then SCM_CHAR=$SCM_SVN_CHAR
  else SCM_CHAR=$SCM_NONE_CHAR
  fi
}

function scm_prompt_vars {
  scm
  scm_prompt_char
  SCM_DIRTY=0
  SCM_STATE=''
  [[ $SCM == $SCM_GIT ]] && git_prompt_vars && return
  [[ $SCM == $SCM_HG ]] && hg_prompt_vars && return
  [[ $SCM == $SCM_SVN ]] && svn_prompt_vars && return
}

function scm_prompt_info {
  scm
  scm_prompt_char
  SCM_DIRTY=0
  SCM_STATE=''
  [[ $SCM == $SCM_GIT ]] && git_prompt_info && return
  [[ $SCM == $SCM_HG ]] && hg_prompt_info && return
  [[ $SCM == $SCM_SVN ]] && svn_prompt_info && return
}

function git_prompt_vars {
  local details=''
  SCM_STATE=${GIT_THEME_PROMPT_CLEAN:-$SCM_THEME_PROMPT_CLEAN}
  if [[ "$(git config --get bash-it.hide-status)" != "1" ]]; then
    local status="$(git status -b --porcelain 2> /dev/null || git status --porcelain 2> /dev/null)"
    if [[ -n "${status}" ]] && [[ "${status}" != "\n" ]] && [[ -n "$(grep -v ^# <<< "${status}")" ]]; then
      SCM_DIRTY=1
      if [[ "${SCM_GIT_SHOW_DETAILS}" = "true" ]]; then
        local untracked_count="$(egrep -c '^\?\? .+' <<< "${status}")"
        local unstaged_count="$(egrep -c '^.[^ ?#] .+' <<< "${status}")"
        local staged_count="$(egrep -c '^[^ ?#]. .+' <<< "${status}")"
        [[ "${staged_count}" -gt 0 ]] && details+=" ${SCM_GIT_STAGED_CHAR}${staged_count}" && SCM_DIRTY=3
        [[ "${unstaged_count}" -gt 0 ]] && details+=" ${SCM_GIT_UNSTAGED_CHAR}${unstaged_count}" && SCM_DIRTY=2
        [[ "${untracked_count}" -gt 0 ]] && details+=" ${SCM_GIT_UNTRACKED_CHAR}${untracked_count}" && SCM_DIRTY=1
      fi
      SCM_STATE=${GIT_THEME_PROMPT_DIRTY:-$SCM_THEME_PROMPT_DIRTY}
    fi
  fi

  local ref=$(git symbolic-ref -q HEAD 2> /dev/null)
  if [[ -n "$ref" ]]; then
    SCM_BRANCH=${SCM_THEME_BRANCH_PREFIX}${ref#refs/heads/}
  else
    ref=$(git describe --tags --exact-match 2> /dev/null)
    if [[ -n "$ref" ]]; then
      SCM_BRANCH=${SCM_THEME_TAG_PREFIX}${ref}
    else
      local commit_re='(^remotes/)?(.+-g[a-zA-Z0-9]+)$'
      local remote_re='^remotes/(.+)$'
      ref=$(git describe --tags --all --always 2> /dev/null)
      if [[ "$ref" =~ ${commit_re} ]]; then
        SCM_BRANCH=${SCM_THEME_COMMIT_PREFIX}${BASH_REMATCH[2]}
      elif [[ "$ref" =~ ${remote_re} ]]; then
        SCM_BRANCH=${SCM_THEME_REMOTE_PREFIX}${BASH_REMATCH[1]}
      fi
    fi
  fi

  local ahead_re='.+ahead ([0-9]+).+'
  local behind_re='.+behind ([0-9]+).+'
  [[ "${status}" =~ ${ahead_re} ]] && SCM_BRANCH+=" ${SCM_GIT_AHEAD_CHAR}${BASH_REMATCH[1]}"
  [[ "${status}" =~ ${behind_re} ]] && SCM_BRANCH+=" ${SCM_GIT_BEHIND_CHAR}${BASH_REMATCH[1]}"

  local stash_count="$(git stash list 2> /dev/null | wc -l | tr -d ' ')"
  [[ "${stash_count}" -gt 0 ]] && SCM_BRANCH+=" {${stash_count}}"

  SCM_BRANCH+=${details}

  SCM_PREFIX=${GIT_THEME_PROMPT_PREFIX:-$SCM_THEME_PROMPT_PREFIX}
  SCM_SUFFIX=${GIT_THEME_PROMPT_SUFFIX:-$SCM_THEME_PROMPT_SUFFIX}
  SCM_CHANGE=$(git rev-parse HEAD 2>/dev/null)
}

# this functions returns absolute location of .hg directory if one exists
# It starts in the current directory and moves its way up until it hits /.
# If we get to / then no Mercurial repository was found.
# Example:
# - lets say we cd into ~/Projects/Foo/Bar
# - .hg is located in ~/Projects/Foo/.hg
# - get_hg_root starts at ~/Projects/Foo/Bar and sees that there is no .hg directory, so then it goes into ~/Projects/Foo
function get_hg_root {
    local CURRENT_DIR=$(pwd)

    while [ "$CURRENT_DIR" != "/" ]; do
        if [ -d "$CURRENT_DIR/.hg" ]; then
            echo "$CURRENT_DIR/.hg"
            return
        fi

        CURRENT_DIR=$(dirname $CURRENT_DIR)
    done
}

function hg_prompt_vars {
    if [[ -n $(hg status 2> /dev/null) ]]; then
      SCM_DIRTY=1
        SCM_STATE=${HG_THEME_PROMPT_DIRTY:-$SCM_THEME_PROMPT_DIRTY}
    else
      SCM_DIRTY=0
        SCM_STATE=${HG_THEME_PROMPT_CLEAN:-$SCM_THEME_PROMPT_CLEAN}
    fi
    SCM_PREFIX=${HG_THEME_PROMPT_PREFIX:-$SCM_THEME_PROMPT_PREFIX}
    SCM_SUFFIX=${HG_THEME_PROMPT_SUFFIX:-$SCM_THEME_PROMPT_SUFFIX}

    HG_ROOT=$(get_hg_root)

    if [ -f $HG_ROOT/branch ]; then
        # Mercurial holds it's current branch in .hg/branch file
        SCM_BRANCH=$(cat $HG_ROOT/branch)
    else
        SCM_BRANCH=$(hg summary 2> /dev/null | grep branch: | awk '{print $2}')
    fi

    if [ -f $HG_ROOT/dirstate ]; then
        # Mercurial holds various information about the working directory in .hg/dirstate file. More on http://mercurial.selenic.com/wiki/DirState
        SCM_CHANGE=$(hexdump -n 10 -e '1/1 "%02x"' $HG_ROOT/dirstate | cut -c-12)
    else
        SCM_CHANGE=$(hg summary 2> /dev/null | grep parent: | awk '{print $2}')
    fi
}

function rvm_version_prompt {
  if which rvm &> /dev/null; then
    rvm=$(rvm tools identifier) || return
    if [ $rvm != "system" ]; then
      echo -e "$RVM_THEME_PROMPT_PREFIX$rvm$RVM_THEME_PROMPT_SUFFIX"
    fi
  fi
}

function rbenv_version_prompt {
  if which rbenv &> /dev/null; then
    rbenv=$(rbenv version-name) || return
    $(rbenv commands | grep -q gemset) && gemset=$(rbenv gemset active 2> /dev/null) && rbenv="$rbenv@${gemset%% *}"
    if [ $rbenv != "system" ]; then
      echo -e "$RBENV_THEME_PROMPT_PREFIX$rbenv$RBENV_THEME_PROMPT_SUFFIX"
    fi
  fi
}

function ruby_version_prompt {
  echo -e "$(rbenv_version_prompt)$(rvm_version_prompt)"
}

function virtualenv_prompt {
  if [[ -n "$VIRTUAL_ENV" ]]; then
    virtualenv=`basename "$VIRTUAL_ENV"`
    echo -e "$VIRTUALENV_THEME_PROMPT_PREFIX$virtualenv$VIRTUALENV_THEME_PROMPT_SUFFIX"
  fi
}

# backwards-compatibility
function git_prompt_info {
  git_prompt_vars
  echo -e "$SCM_PREFIX$SCM_BRANCH$SCM_STATE$SCM_SUFFIX"
}

function svn_prompt_info {
  svn_prompt_vars
  echo -e "$SCM_PREFIX$SCM_BRANCH$SCM_STATE$SCM_SUFFIX"
}

function hg_prompt_info() {
  hg_prompt_vars
  echo -e "$SCM_PREFIX$SCM_BRANCH:${SCM_CHANGE#*:}$SCM_STATE$SCM_SUFFIX"
}

function scm_char {
  scm_prompt_char
  echo -e "$SCM_CHAR"
}

function prompt_char {
    scm_char
}

if [ ! -e $BASH_IT/plugins/enabled/battery.plugin.bash ]; then
# if user has installed battery plugin, skip this...
    function battery_charge (){
    # no op
      echo -n
    }
fi