#!/bin/bash

#----------------------------#
get_book() {                 #
#----------------------------#
  cd $JHALFSDIR

  if [ -z "$WORKING_COPY" ] ; then
# Check for Subversion or git instead of just letting the script fail.
    test `type -p git` || eval "echo \"This feature requires Git.\"
    exit 1"

    echo -n "Downloading the lfs document, branch/tag/commit: $COMMIT... "

    # Grab a fresh book if it's missing, otherwise, update it from the
    # repo. If we've already extracted the commands, move on to getting the
    # sources.
    if [ ! -d "$BOOK"/.git ]; then
        git clone "$REPO" "$BOOK" >>"$LOGDIR/$LOG" 2>&1
        if [ "$COMMIT" != trunk ]; then
           pushd "$BOOK" >/dev/null
           echo "Checking out $COMMIT at $PWD"
           git checkout "$COMMIT" >>"$LOGDIR/$LOG" 2>&1
           popd >/dev/null
        fi
    else
      cd "$BOOK"
      # If the repo is in "detached head" state, git pull fails, so get
      # back first to trunk:
      git checkout trunk >>"$LOGDIR/$LOG" 2>&1
      git pull >>"$LOGDIR/$LOG" 2>&1
      if [ "$COMMIT" != "trunk" ]; then
         git checkout "$COMMIT" >>"$LOGDIR/$LOG" 2>&1
      fi
    fi
    echo -ne "done\n"

  else # Working copy
    echo -ne "Using $BOOK as book's sources ...\n"
  fi
}

#----------------------------#
extract_commands() {         #
#----------------------------#

  cd $JHALFSDIR
  # Clean
  rm -rf "$COMMANDS"

  # Extract the commands
  echo -n "Extracting commands for"
  echo -n " ${L_arrow}${BOLD}LFS${R_arrow} build... "
  # The scripts pages are xincluded by the book, so must
  # be generated for running xsltproc
  pushd $BOOK > /dev/null
  if [ -f process-scripts.sh ]; then
    bash process-scripts.sh >> $LOGDIR/$LOG 2>&1
  fi
  # Recent git versions need version.ent to be generated
  if [ -f git-version.sh ]; then
    bash git-version.sh "$INITSYS" >> $LOGDIR/$LOG 2>&1
  fi
  popd > /dev/null

  if [ "$ALL_CORES" = "y" ]; then
	  JOBS="\$(nproc)"
  else
	  JOBS="$N_PARALLEL"
  fi
  if [ "$REALSBU" = y ]; then JOBSBP1=1; else JOBSBP1="$JOBS"; fi

  # First profile the book, for revision and arch. Note that
  # MULTIBLIB is set to "default" if pure 64 bit book. In this case,
  # profiling on arch is useless, but does not hurt either.
  xsltproc --nonet                                      \
           --xinclude                                   \
           --stringparam profile.revision "$INITSYS"    \
           --stringparam profile.arch     "$MULTILIB"   \
           --output prbook.xml                          \
           $BOOK/stylesheets/lfs-xsl/profile.xsl        \
           $BOOK/index.xml >> $LOGDIR/$LOG 2>&1

  # Use the profiled book for generating the scriptlets
  xsltproc --nonet                                      \
           --stringparam testsuite      "$TEST"         \
           --stringparam ncurses5       "$NCURSES5"     \
           --stringparam strip          "$STRIP"        \
           --stringparam del-la-files   "$DEL_LA_FILES" \
           --stringparam full-locale    "$FULL_LOCALE"  \
           --stringparam timezone       "$TIMEZONE"     \
           --stringparam page           "$PAGE"         \
           --stringparam lang           "$LANG"         \
           --stringparam pkgmngt        "$PKGMNGT"      \
           --stringparam wrap-install   "$WRAP_INSTALL" \
           --stringparam hostname       "$HOSTNAME"     \
           --stringparam interface      "$INTERFACE"    \
           --stringparam ip             "$IP_ADDR"      \
           --stringparam gateway        "$GATEWAY"      \
           --stringparam prefix         "$PREFIX"       \
           --stringparam broadcast      "$BROADCAST"    \
           --stringparam domain         "$DOMAIN"       \
           --stringparam nameserver1    "$DNS1"         \
           --stringparam nameserver2    "$DNS2"         \
           --stringparam font           "$FONT"         \
           --stringparam fontmap        "$FONTMAP"      \
           --stringparam unicode        "$UNICODE"      \
           --stringparam keymap         "$KEYMAP"       \
           --stringparam local          "$LOCAL"        \
           --stringparam log-level      "$LOG_LEVEL"    \
           --stringparam script-root    "$SCRIPT_ROOT"  \
           --stringparam jobs           "$JOBS"         \
           --stringparam jobs-bp1       "$JOBSBP1"      \
           --output "./${COMMANDS}/"                    \
           $XSL                                         \
           prbook.xml >> $LOGDIR/$LOG 2>&1
  # Remove flags requesting user action in some cases. Much easier here than
  # in the stylesheet...
  sed -i 's/-iv /-v /' "./${COMMANDS}/"chapter??/*kernel*
  # If doing a destdir install (PM without wrap), the gcc instructions
  # fail for two reasons: a missing dir, and gcc -dumpmachine returns a
  # wrong string.
  if [ "$PKGMNGT" = y ] && [ "$WRAP_INSTALL" = n ]; then
    sed -e 's|(gcc|&/xgcc|' \
        -e '/lto_plug/imkdir -pv $PKG_DEST/usr/lib/bfd-plugins' \
        -i ./${COMMANDS}/chapter08/*gcc
  fi
  echo "done"

  # Make the scripts executable.
  chmod -R +x "$JHALFSDIR/${COMMANDS}"
  create_chroot_scripts
  create_kernfs_scripts

  # we create the VERSION variable here. Should maybe go into its own
  # function. But at this point we can use the profiled xml to get
  # version from lfs-release in the lfs case.
  VERSION=$(grep 'echo.*lfs-release' prbook.xml | sed 's/.*echo[ ]*\([^ ]*\).*/\1/')

  # Done. Moving on...
  get_sources
}

#----------------------------#
create_chroot_scripts() {    #
#----------------------------#

  rm -rf chroot-scripts
  echo -n "Creating chroot commands scripts from $BOOK"
  if [ ! -z $ARCH ] ; then echo -n " $ARCH" ; fi
  echo -n "... "
  xsltproc --nonet --xinclude \
           --stringparam jobs_2 "$JOBS_2" \
           -o chroot-scripts/ chroot.xsl  \
           $BOOK/chapter0?/*chroot*.xml >> $LOGDIR/$LOG 2>&1
  echo "done"

}

#----------------------------#
create_kernfs_scripts() {    #
#----------------------------#

  rm -rf kernfs-scripts
  mkdir kernfs-scripts
  echo -n "Creating virtual kernel FS commands scripts from $BOOK"
  if [ ! -z $ARCH ] ; then echo -n " $ARCH" ; fi
  echo -n "... "
  xsltproc --nonet \
           -o kernfs-scripts/devices.sh kernfs.xsl \
           $BOOK/*/kernfs.xml >> $LOGDIR/$LOG 2>&1
  chmod +x kernfs-scripts/devices.sh
  xsltproc --nonet \
           -o kernfs-scripts/teardown.sh kernfs.xsl \
           $BOOK/chapter??/reboot.xml >> $LOGDIR/$LOG 2>&1
  chmod +x kernfs-scripts/teardown.sh

  echo "done"

}