#!/bin/sh

# pacinstall 0.2 - Keeps track of file system changes during 'make install'
# of software and installs it as a package in pacman.
# Copyright (C) 2011  Andreas Textor (textor.andreas@googlemail.com)
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

 
# This script is based on inst2rpm by Jon A. Christopher,
# which is included with installwatch until version 0.5.6

# Changelog: 0.1 - first version
#            0.2 - fixed handling of files with spaces in their names


# help
function displayhelp {
  cat << EOF
pacinstall 0.2 by Andreas Textor
Resembles checkinstall, for Arch Linux (http://archlinux.org/)

Just call pacinstall instead of "make install" when installing
software from source. An arch package will be created and installed
using pacman.

You need to have installwatch installed, download it here:
http://asic-linux.com.mx/~izto/checkinstall/installwatch.html
or get it from AUR:
http://aur.archlinux.org/packages.php?ID=1145
EOF
}

# check for parameters and id
if [ "$1" = "-h" ] || [ "$1" = "--help" ] || [ "$1" = "help" ]; then
  displayhelp
  exit
fi

if [ `whoami` != "root" ]; then
  echo "WARNING! You are not root. Errors during the installation are expected."
  echo -n "If you still want to continue, type "yes" (otherwise press CTRL+C): "
  read tmp
  if [ x"$tmp" != "xyes" ]; then
    exit
  fi
fi


# check for installwatch
INSTALLWATCH=`which installwatch 2>/dev/null`
if [ x$INSTALLWATCH = x ]; then
  echo "installwatch not found in PATH, exiting."
  echo "Get it from: http://asic-linux.com.mx/~izto/checkinstall/installwatch.html"
  echo "or get it from AUR: http://aur.archlinux.org/packages.php?ID=1145"
  exit
fi


# set up values and temp-directory
MPWD="`pwd`"
a="${MPWD##*/}"
VERSION="${a##*-}"
PACKAGE="${a%%-*}"
URL=
SUMMARY=
LICENSE="GPL"
ARCH="i686"
DEPENDS=
FAKEROOT=/tmp/pacinstall
PKGINFO=$FAKEROOT/.PKGINFO
FILEINFO=$FAKEROOT/.FILELIST
INSTALLWATCHLOG=/tmp/installwatchlog.$$
FILELIST=/tmp/filelist.$$

if [ -d $FAKEROOT ]; then
  rm -rf $FAKEROOT
fi
mkdir $FAKEROOT

# get values
echo -n "New package name: ($PACKAGE): "; read tmp
if [ x"$tmp" != x ]; then 
  PACKAGE="$tmp"
fi

echo -n "Version: ($VERSION): "; read tmp
if [ x"$tmp" != x ]; then
  VERSION="$tmp"
fi

echo -n "URL: ($URL): "; read tmp
if [ x"$tmp" != x ]; then
  URL="$tmp"
fi

echo -n "Summary: ($SUMMARY): "; read tmp
if [ x"$tmp" != x ]; then 
  SUMMARY="$tmp"
fi

echo -n "License: ($LICENSE): "; read tmp
if [ x"$tmp" != x ]; then 
  LICENSE="$tmp"
fi

echo -n "Architecture: ($ARCH): "; read tmp
if [ x"$tmp" != x ]; then 
  ARCH="$tmp"
fi

echo -n "Depends (space separated): ($DEPENDS): "; read tmp
if [ x"$tmp" != x ]; then
  DEPENDS="$tmp"
fi

echo
echo "Installing using installwatch..."

installwatch -o $INSTALLWATCHLOG make install

echo "Copying files to temp directory..."

awk -F'\t' '$2=="open"||$2=="link" {print $3} ; $2=="rename" {print $4}' < $INSTALLWATCHLOG | grep ^/ | \
   egrep -v '/dev|$HOME' | sort | uniq > $FILELIST

for i in `cat $FILELIST`; do
  tdir="${FAKEROOT}/${i%/*}"
  mkdir -p "$tdir"
  cp "$i" "$tdir"
done
/bin/rm $FILELIST

echo "Create PKGINFO and FILEINFO..."

# write PKGINFO file
[ -e $PKGINFO ] && rm $PKGINFO
cat > $PKGINFO << EOF
# Generated by pacinstall
pkgname = $PACKAGE
pkgver = $VERSION
pkgdesc = $SUMMARY
url = $URL
builddate = `LC_ALL=C date "+%a %b %d %H:%M:%S %Y"`
packager = Pacinstall
size = `/bin/du -sb $FAKEROOT|awk '{ print $1 }'`
arch = $ARCH
license = $LICENSE
EOF
if [ x"$DEPENDS" != x ]; then
  for i in $DEPENDS; do
    echo "depend = $i" >> $PKGINFO
  done
fi

# write FILEINFO file
cd $FAKEROOT
[ -e $FILEINFO ] && rm $FILEINFO
for i in *; do
  find $i >> $FILEINFO
done

PKG="$MPWD/$PACKAGE-$VERSION.pkg.tar.gz"
echo "Creating Package `basename $PKG`..."

cd "$FAKEROOT"
tar cfvz "$PKG" .PKGINFO .FILELIST *
echo "$PKG written."

# install the package via pacman, to let pacman know about the new files
echo "Installing $PKG..."
pacman -Uf "$PKG"

# clean up
/bin/rm -rf $FAKEROOT
/bin/rm $INSTALLWATCHLOG