build

#!/usr/bin/env zsh

# -- Setup ----------------------------------------------------------------------
set -e

local -a help clean force
zparseopts -D --\
  h=help   -help=help\
  c=clean  -clean=clean\
  f=force  -force=force\
  t:=theme  -theme:=theme

# installation target
ILOC=$HOME/.xmonad/xmonad-x86_64-linux

# find all files newer than the compiled xmonad
OLD=$(find . -newer $ILOC | grep -Ev 'dist*|.git' | wc -l)


# -- Functions ------------------------------------------------------------------
help () {
  echo "
    Configuration script for compiling Aloysius' XMonad setup

    Usage:
      ./build [FLAGS]

    Flags:
      -h --help    prints this message
      -c --clean   compile then remove build content
      -C --tidy    only remove previous build content
      -a --all     get all of the supplementary content

      -t --theme [nord|dracula|ephemeral|laserwave]
             sets a theme and recompiles xmonad with that theme

      No flag causes a standard compile with no cleaning

  "
}


compile () {
  printf "   Configuring\r"
  [[ -a cabal.project.local ]] ||\
    nix-shell --command \
    "cabal configure --enable-optimisation --enable-library-stripping" >\
      install.log
  echo "   Configured  "


  printf "   Building\r"
  nix-shell --command "cabal build" >> install.log 2>&1
  echo "   Built    "


  printf "   Installing\r"
  fd -tf 'xmonad' dist* -x mv -u {} $ILOC
  echo "   Installed "
}


clean () {
  printf "   Cleaning\r"
  find . \( -name '*.hi'\
        -or -name '*.o'\
        -or -name '*.errors'\
        -or -name '*.log'\
        -or -name 'cabal.project.local*'\
        \) -type f -delete

  rm -rf dist-newstyle/
  rm -rf dist/

  echo "   Cleaned  "
}


build () {
  echo "  Building Aloysius, sit tight"
  [[ -n $clean  ]] && compile && clean && xmonad --restart && exit
  [[ $#  -eq  0 ]] && compile && echo "   Restarting XMonad " &&\
                      xmonad --restart && exit
}


all () {
  printf "   Fetching scripts\r"
  git clone https://github.com/karetsu/scripts $HOME/.scripts 1>install.log
  echo "   Scripts installed  "

  printf "   Fetching nix-overlay\r"
  [[ -d $HOME/.config/nixpkgs ]] &&\
    echo "Overlay exists, skipping" >> install.log ||\
    git clone https://github.com/karetsu/ $HOME/.config/nixpkgs 1>install.log

  (( $+commands[home-manager] )) &&\
    home-manager switch ||\
    echo "home-manager does not exist" >> install.log
  echo "   Overlay installed   "
}


themeCompile () {
  theme=("${(@)theme:#-t}")
  echo "  Setting new theme: $theme[@]"

  case $theme[@] in
    nord | laserwave | ephemeral | horizon | dracula | lovelace | nature )
      setTheme $theme[@];;
    *)
      echo "   You have incorrectly specified a theme, please see the help"
      ;;
  esac
}


setTheme () {
  THEME=$theme[@]
  PROPER=$(echo $theme[@] | sed 's/^\s*./\U&\E/g')

  sed "s/import qualified Theme.*/import qualified Theme.$PROPER as T/" \
    -i lib/Theme/ChosenTheme.hs

  # kitty
  [[ -a ~/.config/kitty/themes/$THEME.conf ]] &&
    sed "s/include themes\/.*/include themes\/$THEME.conf/" \
      -i ~/.config/kitty/kitty.conf

  # everything under home-manager
  [[ -a ~/.config/nixpkgs/etc/dunst.nix ]] && \
    sed "s/\(let colours = import .\/themes\/\).*;/\1$THEME.nix;/" \
    -i ~/.config/nixpkgs/etc/dunst.nix


  [[ -a ~/.config/nixpkgs/etc/dunst.nix ]] && \
    sed "s/\(let colours = import .\/themes\/\).*;/\1$THEME.nix;/" \
      -i ~/.config/nixpkgs/etc/dunst.nix


  [[ -a ~/.config/nixpkgs/etc/polybar-xmonad.nix ]] && \
    sed "s/\(colours = import .\/themes\/\).*;/\1$THEME.nix;/" \
      -i ~/.config/nixpkgs/etc/polybar-xmonad.nix


  [[ -a ~/.config/nixpkgs/etc/xresources.nix ]] && \
    sed "s/\(colours = import .\/themes\/\).*;/\1$THEME.nix;/" \
      -i ~/.config/nixpkgs/etc/xresources.nix

  home-manager switch 2>> install.log 1>/dev/null
  pkill -USR1 polybar

  echo "   Additional theme elements applied"
}


# Runtime --------------------------------------------------------------------
[[ -n $help  ]] && help         && exit
[[ -n $clean ]] && clean        && exit
[[ -n $force ]] && build        && exit
[[ -n $theme ]] && themeCompile && build && ~/.scripts/caffeine && exit
[[ $OLD > 1  ]] && build        || echo " No compilation required"