#!/bin/bash
# Version: 1.3 GSB SlackBuild.
# Copyright (c) 2007 Darren 'Tadgy' Austin <darren (at) gnomeslackbuild.org>
#
# Licenced under the terms of the GNU General Public Licence version 3.
#

# The default list of GSB sections, in the order they should be processed.
SECTIONS="${SECTIONS:-	tools
			libraries
			platform
			desktop
			applications
			accessibility
			bindings
			office
			mono
			extras
			themes
			compiz	}"

# Usage.
function usage() {
  cat << EOF
Usage: ${0##*/} [options]

Options:
  -help			Show this help screen.

  -list			For each of the GSB sections, list the packages which
			will be built.  When the SECTIONS environment variable
			is set (see README) only those sections are displayed.

  -force		A package will not be built if a package of the same
			name is already installed, or any of the pre-requisite
			packages are not installed.  This option over-rides
			the checks and attempts a build (which will probably
			fail) anyway.

  -no-skip		During the build process, packages that are up to date
			(ie, the package version and build numbers match the
			coresponding SlackBuild) will not be rebuilt.  This
			option forces packages to be rebuilt regardless of the
			version and build numbers.  This does not affect the
			pre-build checks for installed packages (see -force).

  -no-metafiles		Do not create the .txt and .md5 files for each package
			which would usually be produced during a build.

  -no-prune		Normally, when a package is built and copied to the
			destination directory, any previous package(s) of the
			same name are deleted - it is assumed the new package
			is to replace any which were built previously.
			This option prevents previous packages being deleted
			from the destination directory, possibly leaving more
			than one package of the same name (but with different
			version or build numbers) laying around.

  -no-cleanup		By default, any source, temporary build and package
			directories will be deleted once the package is built.
			This option prevents those files from being removed.

  -no-install		Build packages but don't install them.  This should
			only be used for testing individual SlackBuilds as it
			WILL cause serious problems - some package builds may
			rely on another package being auto installed first.

  Options are passed down to the next level SlackBuild where appropriate.
EOF
}

function list_packages() {
  echo "The sections and packages below (listed in processing order) will be built."
  for SECTION in $SECTIONS
  do
    echo
    echo "  $SECTION:"
    echo "$( $SECTION/gsb.$SECTION.SlackBuild --list | cut -d$'\n' -f2- )"
  done
}

function runtime() {
  # $1 = Number of seconds to convert to readable text

  local D=$(( $1 / 86400 ))
  local H=$(( ($1 - ($D * 86400)) / 3600 ))
  local M=$(( ($1 - ($D * 86400) - ($H * 3600)) / 60 ))
  local S=$(( $1 - ($D * 86400) - ($H * 3600) - ($M * 60) ))

  if [ $D -gt 0 ]; then
    echo -n "${D}d, ${H}h ${M}m ${S}s"
  else
    echo -n "${H}h, ${M}m ${S}s"
  fi
  return 0
}

# Make sure we are in the right directory (you can never trust users..)
cd $( cd ${BASH_SOURCE%/*} ; pwd )

# If the user created an options file, read it.
[ -r ./gsb.options ] && {
  . ./gsb.options
  export OPTIONSREAD=1
}

# Environment.
export TMP=${TMP:-/tmp}
export PKGDEST=${PKGDEST:-$TMP/gsb-tree/packages}
export LOGSDIR=${LOGSDIR:-$TMP/gsb-buildlogs}

# Parse command line arguments.
while [ $# -gt 0 ]; do
  if [ "$1" = "-help" ] || [ "$1" = "--help" ]; then
    usage
    exit 0
  elif [ "$1" = "-list" ] || [ "$1" = "--list" ]; then
    list_packages
    exit 0
  elif [ "$1" = "-force" ] || [ "$1" = "--force" ]; then
    SLACKBUILD_ARGS="${SLACKBUILD_ARGS:+"$SLACKBUILD_ARGS "}-force"
    shift
  elif [ "$1" = "-no-skip" ] || [ "$1" = "--no-skip" ]; then
    SLACKBUILD_ARGS="${SLACKBUILD_ARGS:+"$SLACKBUILD_ARGS "}-no-skip"
    shift
  elif [ "$1" = "-no-metafiles" ] || [ "$1" = "--no-metafiles" ]; then
    SLACKBUILD_ARGS="${SLACKBUILD_ARGS:+"$SLACKBUILD_ARGS "}-no-metafiles"
    shift
  elif [ "$1" = "-no-prune" ] || [ "$1" = "--no-prune" ]; then
    SLACKBUILD_ARGS="${SLACKBUILD_ARGS:+"$SLACKBUILD_ARGS "}-no-prune"
    shift
  elif [ "$1" = "-no-cleanup" ] || [ "$1" = "--no-cleanup" ]; then
    SLACKBUILD_ARGS="${SLACKBUILD_ARGS:+"$SLACKBUILD_ARGS "}-no-cleanup"
    shift
  elif [ "$1" = "-no-install" ] || [ "$1" = "--no-install" ]; then
    SLACKBUILD_ARGS="${SLACKBUILD_ARGS:+"$SLACKBUILD_ARGS "}-no-install"
    shift
  else
    echo "${0##*/}: Unknown option: $1"
    echo "Try: $0 -help"
    exit 1
  fi
done

# Temporary space, package and log file storage.
mkdir -p $TMP
mkdir -p $PKGDEST
mkdir -p $LOGSDIR

# Make sure /usr/include/db.h points to the db4 header.
( cd /usr/include ; rm -f db.h ; ln -s db4/db.h db.h ) || {
  echo "${0##*/}: Could not set db.h header"
  exit 1
}

# Do the build.
( echo
  echo "*********************************************************************"
  echo "* Building GSB - this may take a while..."
  echo "*********************************************************************"

  for SECTION in $SECTIONS
  do
    ( cd $SECTION && ./gsb.$SECTION.SlackBuild $SLACKBUILD_ARGS 2>&1 ) || {
      echo
      echo "*********************************************************************"
      echo "* Build aborted: error building in section '$SECTION'."
      echo "* Check the build logs in '$LOGSDIR' and try again."
      echo "*********************************************************************"
      echo "* Build failed after $( runtime $SECONDS )."
      echo "*********************************************************************"
      exit 1
    }
  done

  echo
  echo "*********************************************************************"
  echo "* Finished building GSB!"
  echo "* GSB was sucessfully built and installed on the system."
  echo "* See the README file for details on how to start GNOME."
  echo "*********************************************************************"
  echo "* A copy of all GSB packages can be found in '$PKGDEST'."
  echo "* Build logs can be found in '$LOGSDIR'."
  echo "* Package files and build logs can be deleted if not required."
  echo "*********************************************************************"
  echo "* Complete build time was $( runtime $SECONDS )."
  echo "*********************************************************************"
) 2>&1 | tee $LOGSDIR/$( basename $0 .SlackBuild )-$( date +%Y%m%d-%H%M%S ).log

# Return the exit status from the sub-shell, not the tee command.
exit ${PIPESTATUS[0]}