#! /bin/sh

set -e

umask 002

sub=
mkdir -p $HOME$sub

: ${REPO=http://guvnor.distorted.org.uk/ftp/pub/mdw}

export PATH=/usr/local/bin:$HOME$sub/bin:/usr/bin:/usr/ccs/bin:/bin

### Sort out command line
xstuff= false=
while [ $# -gt 0 ]; do
  case "$1" in
    -x) xstuff=t;;
    -n) false=false;;
    --) shift; break;;
    -*) echo >&2 "$0: bad option"; exit 1;;
    *) break;;
  esac
  shift
done

### Find out where I am
here=$(pwd)

### Suss out how to print things
out=$(echo -n "foo"; echo "bar")
if [ "$out" = "foobar" ]; then
  echon="echo -n"
  echoc=""
else
  echon="echo"
  echoc='\c'
fi

### Create the necessary directories
echo "Creating directories..."
for i in bin lib/emacs src; do
  $echon "  $i:$echoc"
  if [ -d $HOME$sub/$i ]; then
    echo " already exists."
  else
    mkdir -p $HOME$sub/$i
    echo " done."
  fi
done
echo "  all done."

### Find out how to fetch things over the net
$echon "Finding URL fetcher:$echoc"
if curl >/dev/null 2>&1 --version || [ $? -eq 2 ]; then
  GETURL="curl -fs -o"
  echo " curl."
elif wget >/dev/null 2>&1 --version; then
  GETURL="wget -q -O"
  echo " wget."
else
  echo " failed!"
  echo >&2 "$0: failed to find URL fetcher"
  exit 1
fi

### Install necessary things
echo "Installing useful scripts..."

for script in lesspipe.sh start-ssh-agent svnwrap; do
  $echon "  $script:$echoc"
  found=
  for p in /bin /usr/bin /usr/local/bin $(echo $PATH | tr : ' '); do
    if $false [ -x $p/$script ]; then
      found=t
      break
    fi
  done
  if [ "$found" ]; then
    echo " already installed."
  else
    $echon " downloading$echoc"
    $GETURL $HOME$sub/bin/$script $REPO/$script
    chmod +x $HOME$sub/bin/$script
    echo " done."
  fi
done

echo "  all done."

### Install some more complicated programs
echo "Installing packages..."
systems="
  mLib:2.0.3:mLib-config
  chkpath:1.1.0:tmpdir
"
[ "$xstuff" ] && systems="$systems
  mgLib:1.1.0:mgLib-config
  xtoys:1.3.0:xscsize
"
for system in $systems; do
  set -- $(echo $system | tr : ' ')
  sys=$1 ver=$2 prog=$3
  $echon "  $sys:$echoc"
  if $false $prog >/dev/null 2>&1 --version; then
    echo " already installed."
  else
    ( set -e
      $echon " downloading$echoc"
      cd $HOME$sub/src
      rm -rf $sys-$ver.tar.gz $sys-$ver
      $GETURL $sys-$ver.tar.gz $REPO/$sys-$ver.tar.gz
      $echon " unpacking$echoc"
      gzip -cd $sys-$ver.tar.gz | tar xf -
      $echon " configuring$echoc"
      cd $sys-$ver
      mkdir build
      cd build
      ../configure --prefix=$HOME$sub >>buildlog 2>&1
      $echon " building$echoc"
      make >>buildlog 2>&1
      $echon " installing$echoc"
      make install >>buildlog 2>&1
      echo " done."
    )
  fi
done
echo "  all done."

### Symlink the various dotfiles into place
dotfiles=" 
  bash_profile bash_logout bashrc
  emacs emacs-calc 
  vm mailrc
  cmucl-init.lisp clisprc.lisp sbclrc
  dircolors screenrc cvsrc"
[ "$xstuff" ] && dotfiles="$dotfiles
  xinitrc xsession Xdefaults
  eterm-theme.cfg:.Eterm/themes/Eterm/theme.cfg
  e-keybindings.cfg:.enlightenment/keybindings.cfg
  jue-peek.jpg:.enlightenment/backgrounds/jue-peek.jpg"
mkdir -p $HOME/test
echo "Installing dotfiles..."
for d in $dotfiles; do
  target=.$d
  case $d in
    *:*) target=${d#*:} d=${d%%:*};;
  esac
  ft=$HOME$sub/$target
  dir=${ft%/*}
  mkdir -p $dir
  ln -s $here/$d $ft.new
  mv $ft.new $ft
  echo "  $target"
done
echo "  all done."

### Set up the Emacs config
echo "Installing Emacs packages..."
for elib in make-regexp; do
  $echon "  $elib:$echoc"
  if $false emacs >/dev/null 2>&1 --batch --eval '
       (kill-emacs (condition-case nil
		       (progn (load-library "make-regexp") 0)
		     (error 1)))'; then
    echo " already installed."
  else
    $echon " downloading$echoc"
    $GETURL $HOME$sub/lib/emacs/make-regexp.el $REPO/make-regexp.el
    $echon " compiling$echoc"
    (cd $HOME$sub/lib/emacs;
      emacs >/dev/null 2>&1 --batch \
	--eval '(byte-compile-file "make-regexp.el")')
    echo " done."
  fi
done
echo "  all done."

$echon "Setting up Emacs configuration:$echoc"
$echon " linking$echoc"
for link in dot-emacs.el:dot-emacs.el emacs-Makefile:Makefile; do
  set -- $(echo $link | tr : ' ')
  from=$1 to=$2
  ln -s $here/$from $HOME$sub/lib/emacs/$to.new
  mv $HOME$sub/lib/emacs/$to.new $HOME$sub/lib/emacs/$to
done
$echon " compiling$echoc"
make >/dev/null 2>&1 -C $HOME$sub/lib/emacs
echo " done."