Add powerline

src/freedombone-powerline

+#!/usr/bin/env bash
+
+# Based on https://github.com/undu/bash-powerline
+
+__powerline() {
+
+  # User config variables,
+  # it's recommended to override those variables through .bashrc or similar
+  #
+  # Use powerline mode
+  # readonly POWERLINE_FONT=''
+  #
+  # Always show user in the prompt
+  # readonly SHOW_USER=''
+  #
+  # Never show a default user
+  # readonly DEFAULT_USER='user'
+
+  # Default background and foreground ANSI colours
+  readonly DEFAULT_BG=0
+  readonly DEFAULT_FG=7
+
+  # Max length of full path
+  readonly MAX_PATH_LENGTH=30
+
+  # Unicode symbols
+  if [ -z "${POWERLINE_FONT+x}" ]; then
+    readonly GIT_BRANCH_SYMBOL='⑂'
+  else
+    readonly GIT_BRANCH_SYMBOL=''
+  fi
+  readonly GIT_BRANCH_CHANGED_SYMBOL='Δ'
+  readonly GIT_NEED_PUSH_SYMBOL='↑'
+  readonly GIT_NEED_PULL_SYMBOL='↓'
+
+  # Powerline symbols
+  readonly BLOCK_START=''
+
+  # ANSI Colours
+  readonly BLACK=0
+  readonly RED=1
+  readonly GREEN=2
+  readonly YELLOW=3
+  readonly BLUE=4
+  readonly MAGENTA=5
+  readonly CYAN=6
+  readonly WHITE=7
+
+  readonly BLACK_BRIGHT=8
+  readonly RED_BRIGHT=9
+  readonly GREEN_BRIGHT=10
+  readonly YELLOW_BRIGHT=11
+  readonly BLUE_BRIGHT=12
+  readonly MAGENTA_BRIGHT=13
+  readonly CYAN_BRIGHT=14
+  readonly WHITE_BRIGHT=15
+
+  # Font effects
+  readonly DIM="\[$(tput dim)\]"
+  readonly REVERSE="\[$(tput rev)\]"
+  readonly RESET="\[$(tput sgr0)\]"
+  readonly BOLD="\[$(tput bold)\]"
+
+  # Generate terminal colour codes
+  # $1 is an int (a colour) and $2 must be 'fg' or 'bg'
+  __colour() {
+    case "$2" in
+      'fg'*)
+        echo "\[$(tput setaf "$1")\]"
+        ;;
+      'bg'*)
+        echo "\[$(tput setab "$1")\]"
+        ;;
+      *)
+        echo "\[$(tput setab "$1")\]"
+        ;;
+    esac
+  }
+
+  # Generate a single-coloured block for the prompt
+  __prompt_block() {
+    local bg; local fg
+    if [ ! -z "${1+x}" ]; then
+      bg=$1
+    else
+      if [ ! -z "$last_bg" ]; then
+        bg=$last_bg
+      else
+        bg=$DEFAULT_BG
+      fi
+    fi
+    if [ ! -z "${2+x}" ]; then
+      fg=$2
+    else
+      fg=$DEFAULT_FG
+    fi
+
+    local block
+
+    # Need to generate a separator if the background changes
+    if [[ ! -z "$last_bg" && "$bg" != "$last_bg" && ! -z "${POWERLINE_FONT+x}" ]]; then
+      block+="$(__colour "$bg" 'bg')"
+      block+="$(__colour "$last_bg" 'fg')"
+      block+="$BLOCK_START $RESET"
+      block+="$(__colour "$bg" 'bg')"
+      block+="$(__colour "$fg" 'fg')"
+    else
+      block+="$(__colour "$bg" 'bg')"
+      block+="$(__colour "$fg" 'fg')"
+      block+=" "
+    fi
+
+    if [ ! -z "${3+x}" ]; then
+      block+="$3 $RESET"
+    fi
+
+    last_bg=$bg
+
+    __block_text="$block"
+  }
+
+  function __end_block() {
+    __block_text=''
+    if [ ! -z "$last_bg" ]; then
+      if [ ! -z "${POWERLINE_FONT+x}" ]; then
+        __block_text+="$(__colour $DEFAULT_BG 'bg')"
+        __block_text+="$(__colour "$last_bg" 'fg')"
+        __block_text+="$BLOCK_START$RESET"
+        __block_text+="$(__colour $DEFAULT_BG 'bg')"
+        __block_text+="$(__colour "$DEFAULT_FG" 'fg')"
+      else
+        __block_text+="$(__colour $DEFAULT_BG 'bg')"
+        __block_text+="$(__colour "$DEFAULT_FG" 'fg')"
+      fi
+    fi
+    __block_text+=' '
+  }
+
+  ### Prompt components
+
+  __git_block() {
+    if ! command -V git > /dev/null; then
+      # git not found
+      __block_text=''
+      return
+    fi
+    # force git output in English to make our work easier
+    local git_eng="env LANG=C git"
+
+    # check if pwd is under git
+    if ! git rev-parse --is-inside-git-dir > /dev/null 2> /dev/null; then
+      # not in a git repo, bail out
+      __block_text=''
+      return
+    fi
+
+    # get current branch name or short SHA1 hash for detached head
+    local branch; local ref_symbol
+    branch="$($git_eng symbolic-ref --short HEAD 2>/dev/null)"
+    # shellcheck disable=SC2181
+    if [ $? != 0 ]; then
+      branch="$($git_eng describe --tags --always 2>/dev/null)"
+      ref_symbol='➦'
+    else
+      ref_symbol=$GIT_BRANCH_SYMBOL
+    fi
+
+    # In pcmode (and only pcmode) the contents of
+    # $gitstring are subject to expansion by the shell.
+    # Avoid putting the raw ref name in the prompt to
+    # protect the user from arbitrary code execution via
+    # specially crafted ref names (e.g., a ref named
+    # '$(IFS=_;cmd=sudo_rm_-rf_/;$cmd)' would execute
+    # 'sudo rm -rf /' when the prompt is drawn).  Instead,
+    # put the ref name in a new global variable (in the
+    # __git_ps1_* namespace to avoid colliding with the
+    # user's environment) and reference that variable from
+    # PS1.
+    # note that the $ is escaped -- the variable will be
+    # expanded later (when it's time to draw the prompt)
+    if shopt -q promptvars; then
+      export __git_ps1_block="$branch"
+      ref="$ref_symbol \${__git_ps1_block}"
+    else
+      ref="$ref_symbol $branch"
+    fi
+
+    local marks
+
+    # check if HEAD is dirty
+    if [ -n "$($git_eng status --porcelain 2>/dev/null)" ]; then
+      dirty='y'
+      marks+=" $GIT_BRANCH_CHANGED_SYMBOL"
+    fi
+
+    # how many commits local branch is ahead/behind of remote?
+    local stat; local aheadN; local behindN
+    stat="$($git_eng status --porcelain --branch 2>/dev/null | grep '^##' | grep -o '\[.\+\]$')"
+    aheadN="$(echo "$stat" | grep -o 'ahead [[:digit:]]\+' | grep -o '[[:digit:]]\+')"
+    behindN="$(echo "$stat" | grep -o 'behind [[:digit:]]\+' | grep -o '[[:digit:]]\+')"
+    [ -n "$aheadN" ] && marks+=" $GIT_NEED_PUSH_SYMBOL$aheadN"
+    [ -n "$behindN" ] && marks+=" $GIT_NEED_PULL_SYMBOL$behindN"
+
+    local bg; local fg
+    fg=$BLACK
+    if [ -z "$dirty" ]; then
+      bg=$GREEN
+    else
+      bg=$YELLOW
+    fi
+
+    __prompt_block $bg $fg "$ref$marks"
+  }
+
+  __virtualenv_block() {
+    # Copied from Python virtualenv's activate.sh script.
+    # https://github.com/pypa/virtualenv/blob/a9b4e673559a5beb24bac1a8fb81446dd84ec6ed/virtualenv_embedded/activate.sh#L62
+    # License: MIT
+    if [ -n "$VIRTUAL_ENV" ]; then
+      local venv
+      # In pcmode (and only pcmode) the contents of
+      # $gitstring are subject to expansion by the shell.
+      # Avoid putting the raw ref name in the prompt to
+      # protect the user from arbitrary code execution via
+      # specially crafted ref names (e.g., a ref named
+      # '$(IFS=_;cmd=sudo_rm_-rf_/;$cmd)' would execute
+      # 'sudo rm -rf /' when the prompt is drawn).  Instead,
+      # put the ref name in a new global variable (in the
+      # __git_ps1_* namespace to avoid colliding with the
+      # user's environment) and reference that variable from
+      # PS1.
+      # note that the $ is escaped -- the variable will be
+      # expanded later (when it's time to draw the prompt)
+      if shopt -q promptvars; then
+        export __venv_ps1_block
+        __venv_ps1_block=$(basename "$VIRTUAL_ENV")
+        venv="$ref_symbol \${__venv_ps1_block}"
+      else
+        venv="$(basename "$VIRTUAL_ENV")"
+      fi
+      __prompt_block $WHITE $BLACK "$venv"
+    else
+      __block_text=''
+    fi
+  }
+
+  __pwd_block() {
+    # Use ~ to represent $HOME prefix
+    local pwd; pwd=$(pwd | sed -e "s|^$HOME|~|")
+    # shellcheck disable=SC1001,SC2088
+    if [[ ( $pwd = ~\/*\/* || $pwd = \/*\/*/* ) && ${#pwd} -gt $MAX_PATH_LENGTH ]]; then
+      local IFS='/'
+      read -ra split <<< "$pwd"
+      if [[ $pwd = ~* ]]; then
+        pwd="~/${split[1]}/.../${split[*]:(-2):1}/${split[*]:(-1)}"
+      else
+        pwd="/${split[1]}/.../${split[*]:(-2):1}/${split[*]:(-1)}"
+      fi
+    fi
+    __prompt_block $BLACK_BRIGHT $WHITE_BRIGHT "$pwd"
+  }
+
+  # superuser or not, here I go!
+  __user_block() {
+    # Colours to use
+    local fg=$WHITE_BRIGHT
+    local bg=$BLUE
+
+    if [[  ! -z "$SSH_CLIENT" ]]; then
+      local show_host="y"
+      bg=$CYAN
+    fi
+
+    if [ -z "$(id -u "$USER")" ]; then
+      bg=$RED
+    fi
+
+    # shellcheck disable=SC2153
+    if [[ ! -z "${SHOW_USER+x}" || (  ! -z "${DEFAULT_USER+x}" && "$DEFAULT_USER" != "$(whoami)" ) ]]; then
+      local show_user="y"
+    fi
+
+    local text
+    if [ ! -z ${show_user+x} ]; then
+      text+="$BOLD$(whoami)"
+    fi
+    if [ ! -z ${show_host+x} ]; then
+      if [ ! -z "${text+x}" ]; then
+        text+="@"
+      fi
+      text+="\h"
+    fi
+
+    if [ ! -z ${text+x} ]; then
+      __prompt_block $bg $fg $text
+    fi
+  }
+
+  __status_block() {
+    local text
+    if [ "$exit_code" != 0 ]; then
+      __prompt_block $BLACK $RED '✘'
+      text+=$__block_text
+    fi
+
+    if [ "$(id -u "$USER")" == 0 ]; then
+      __prompt_block $BLACK $YELLOW '⚡'
+      text+=$__block_text
+    fi
+
+    if [ "$(jobs -l | wc -l)" != 0 ]; then
+      __prompt_block $BLACK $CYAN '⚙'
+      text+=$__block_text
+    fi
+
+    if [ ! -z "$text" ]; then
+      __block_text=$text
+    else
+      __block_text=''
+    fi
+  }
+
+  # Build the prompt
+  prompt() {
+    # I don't like bash; execute first to capture correct status code
+    local exit_code=$?
+    # shellcheck disable=SC2091
+    $(history -a ; history -n)
+
+    last_bg=''
+
+    PS1=''
+
+    __status_block
+    PS1+=$__block_text
+
+    __virtualenv_block
+    PS1+=$__block_text
+
+    __user_block
+    PS1+=$__block_text
+
+    __pwd_block
+    PS1+=$__block_text
+
+    __git_block
+    PS1+=$__block_text
+
+    __end_block
+    PS1+=$__block_text
+  }
+
+  PROMPT_COMMAND=prompt
+}
+
+__powerline
+unset __powerline

src/freedombone-utils-setup

@@ -627,6 +627,28 @@ function setup_firewall {
     firewall_block_bad_ip_ranges
 }
 
+function setup_powerline {
+    if [ -d ~/${PROJECT_NAME}/src/${PROJECT_NAME}-powerline ]; then
+        cp ~/${PROJECT_NAME}/src/${PROJECT_NAME}-powerline ~/.powerline.bash
+        cp ~/${PROJECT_NAME}/src/${PROJECT_NAME}-powerline /etc/skel/.powerline.bash
+    else
+        if [ -d /home/${MY_USERNAME}/${PROJECT_NAME}/src/${PROJECT_NAME}-powerline ]; then
+            cp /home/${MY_USERNAME}/${PROJECT_NAME}/src/${PROJECT_NAME}-powerline ~/.powerline.bash
+            cp /home/${MY_USERNAME}/${PROJECT_NAME}/src/${PROJECT_NAME}-powerline /etc/skel/.powerline.bash
+        fi
+    fi
+    if ! grep -q "powerline" ~/.bashrc; then
+        if [ -f ~/.powerline.bash ]; then
+            echo 'source ~/.powerline.bash' >> ~/.bashrc
+        fi
+    fi
+    if ! grep -q "powerline" /etc/skel/.bashrc; then
+        if [ -f /etc/skel/.powerline.bash ]; then
+            echo 'source ~/.powerline.bash' >> /etc/skel/.bashrc
+        fi
+    fi
+}
+
 function setup_utils {
     read_config_param "PROJECT_REPO"
     write_config_param "PROJECT_REPO" "$PROJECT_REPO"
@@ -828,6 +850,9 @@ function setup_utils {
 
     function_check create_usb_canary
     create_usb_canary
+
+    function_check setup_powerline
+    setup_powerline
 }
 
 function setup_email {