#!/bin/bash

# $Id$

###################################
###	    FUNCTIONS		###
###################################


#############################################################


#----------------------------#
chapter4_Makefiles() {       #
#----------------------------#
  echo "${tab_}${GREEN}Processing... ${L_arrow}Chapter4     ( SETUP ) ${R_arrow}"

# If /home/$LUSER is already present in the host, we asume that the
# lfs user and group are also presents in the host, and a backup
# of their bash init files is made.
(
    cat << EOF
020-creatingtoolsdir:
	@\$(call echo_message, Building)
	@mkdir \$(MOUNT_PT)/tools && \\
	rm -f /tools && \\
	ln -s \$(MOUNT_PT)/tools / && \\
	touch \$@ && \\
	echo " "\$(BOLD)Target \$(BLUE)\$@ \$(BOLD)OK && \\
	echo --------------------------------------------------------------------------------\$(WHITE)

021-addinguser:  020-creatingtoolsdir
	@\$(call echo_message, Building)
	@if [ ! -d /home/\$(LUSER) ]; then \\
		groupadd \$(LGROUP); \\
		useradd -s /bin/bash -g \$(LGROUP) -m -k /dev/null \$(LUSER); \\
	else \\
		touch luser-exist; \\
	fi;
	@chown \$(LUSER) \$(MOUNT_PT)/tools && \\
	chmod -R a+wt \$(MOUNT_PT)/\$(SCRIPT_ROOT) && \\
	chmod a+wt \$(SRCSDIR) && \\
	touch \$@ && \\
	echo " "\$(BOLD)Target \$(BLUE)\$@ \$(BOLD)OK && \\
	echo --------------------------------------------------------------------------------\$(WHITE)

022-settingenvironment:  021-addinguser
	@\$(call echo_message, Building)
	@if [ -f /home/\$(LUSER)/.bashrc -a ! -f /home/\$(LUSER)/.bashrc.XXX ]; then \\
		mv /home/\$(LUSER)/.bashrc /home/\$(LUSER)/.bashrc.XXX; \\
	fi;
	@if [ -f /home/\$(LUSER)/.bash_profile  -a ! -f /home/\$(LUSER)/.bash_profile.XXX ]; then \\
		mv /home/\$(LUSER)/.bash_profile /home/\$(LUSER)/.bash_profile.XXX; \\
	fi;
	@echo "set +h" > /home/\$(LUSER)/.bashrc && \\
	echo "umask 022" >> /home/\$(LUSER)/.bashrc && \\
	echo "LFS=\$(MOUNT_PT)" >> /home/\$(LUSER)/.bashrc && \\
	echo "LC_ALL=POSIX" >> /home/\$(LUSER)/.bashrc && \\
	echo "PATH=/tools/bin:/bin:/usr/bin" >> /home/\$(LUSER)/.bashrc && \\
	echo "export LFS LC_ALL PATH" >> /home/\$(LUSER)/.bashrc && \\
	echo "source $JHALFSDIR/envars" >> /home/\$(LUSER)/.bashrc && \\
	chown \$(LUSER):\$(LGROUP) /home/\$(LUSER)/.bashrc && \\
	touch envars && \\
	chown \$(LUSER) envars && \\
	touch \$@ && \\
	echo " "\$(BOLD)Target \$(BLUE)\$@ \$(BOLD)OK && \\
	echo --------------------------------------------------------------------------------\$(WHITE)
EOF
) > $MKFILE.tmp

  chapter4=" 020-creatingtoolsdir 021-addinguser 022-settingenvironment"
}



#----------------------------#
chapter5_Makefiles() {
#----------------------------#
  echo "${tab_}${GREEN}Processing... ${L_arrow}Chapter5     ( LUSER ) ${R_arrow}"

  for file in chapter05/* ; do
    # Keep the script file name
    this_script=`basename $file`

    # If no testsuites will be run, then TCL, Expect and DejaGNU aren't needed
    # Fix also locales creation when running chapter05 testsuites (ugly)
    case "${this_script}" in
      *tcl)       [[ "${TEST}" = "0" ]] && continue ;;
      *expect)    [[ "${TEST}" = "0" ]] && continue ;;
      *dejagnu)   [[ "${TEST}" = "0" ]] && continue ;;
      *stripping) [[ "${STRIP}" = "n" ]] && continue ;;
      *glibc)     [[ "${TEST}" = "3" ]] && \
                  sed -i 's@/usr/lib/locale@/tools/lib/locale@' $file ;;
    esac

    # First append each name of the script files to a list (this will become
    # the names of the targets in the Makefile
    # DO NOT append the changingowner script, it need be run as root.
    # A hack is necessary: create script in chap5 BUT run as a dependency for
    # SUDO target
    case "${this_script}" in
      *changingowner) runasroot="$runasroot ${this_script}" ;;
                   *) chapter5="$chapter5 ${this_script}" ;;
    esac

    # Grab the name of the target (minus the -pass1 or -pass2 in the case of gcc
    # and binutils in chapter 5)
    name=`echo ${this_script} | sed -e 's@[0-9]\{3\}-@@' -e 's@-pass[0-9]\{1\}@@'`

    # Set the dependency for the first target.
    if [ -z $PREV ] ; then PREV=022-settingenvironment ; fi

    #--------------------------------------------------------------------#
    #         >>>>>>>> START BUILDING A Makefile ENTRY <<<<<<<<          #
    #--------------------------------------------------------------------#
    #
    # Drop in the name of the target on a new line, and the previous target
    # as a dependency. Also call the echo_message function.
    LUSER_wrt_target "${this_script}" "$PREV"

    # Find the version of the command files, if it corresponds with the building of
    # a specific package
    pkg_tarball=$(get_package_tarball_name $name)

    # If $pkg_tarball isn't empty, we've got a package...
    if [ "$pkg_tarball" != "" ] ; then
      # Insert instructions for unpacking the package and to set the PKGDIR variable.
      LUSER_wrt_unpack "$pkg_tarball"
      # If the testsuites must be run, initialize the log file
      [[ "$TEST" = "3" ]] && LUSER_wrt_test_log "${this_script}"
      # If using optimizations, write the instructions
      [[ "$OPTIMIZE" = "2" ]] &&  wrt_optimize "$name" && wrt_makeflags "$name"
    fi

    # Insert date and disk usage at the top of the log file, the script run
    # and date and disk usage again at the bottom of the log file.
    # The changingowner script must be run as root.
    case "${this_script}" in
      *changingowner)  wrt_RunAsRoot "$file" ;;
      *)               LUSER_wrt_RunAsUser "$file" ;;
    esac

    # Remove the build directory(ies) except if the package build fails
    # (so we can review config.cache, config.log, etc.)
    if [ "$pkg_tarball" != "" ] ; then
      LUSER_RemoveBuildDirs "$name"
    fi

    # Include a touch of the target name so make can check
    # if it's already been made.
    wrt_touch
    #
    #--------------------------------------------------------------------#
    #              >>>>>>>> END OF Makefile ENTRY <<<<<<<<               #
    #--------------------------------------------------------------------#

    # Keep the script file name for Makefile dependencies.
    PREV=${this_script}
  done  # end for file in chapter05/*
}


#----------------------------#
chapter6_Makefiles() {
#----------------------------#

  # Set envars and scripts for iteration targets
  if [[ -z "$1" ]] ; then
    local N=""
  else
    local N=-build_$1
    local chapter6=""
    mkdir chapter06$N
    cp chapter06/* chapter06$N
    for script in chapter06$N/* ; do
      # Overwrite existing symlinks, files, and dirs
      sed -e 's/ln -sv/&f/g' \
          -e 's/mv -v/&f/g' \
          -e 's/mkdir -v/&p/g' -i ${script}
    done
    # Remove Bzip2 binaries before make install
    sed -e 's@make install@rm -vf /usr/bin/bz*\n&@' -i chapter06$N/*-bzip2
  fi

  echo "${tab_}${GREEN}Processing... ${L_arrow}Chapter6$N     ( CHROOT ) ${R_arrow}"

  for file in chapter06$N/* ; do
    # Keep the script file name
    this_script=`basename $file`

    # We'll run the chroot commands differently than the others, so skip them in the
    # dependencies and target creation.
    case "${this_script}" in
      *chroot)      continue ;;
      *stripping*) [[ "${STRIP}" = "n" ]] && continue ;;
    esac

    # Grab the name of the target.
    name=`echo ${this_script} | sed -e 's@[0-9]\{3\}-@@'`

    # Find the version of the command files, if it corresponds with the building of
    # a specific package. We need this here to can skip scripts not needed for
    # iterations rebuilds
    pkg_tarball=$(get_package_tarball_name $name)

    if [[ "$pkg_tarball" = "" ]] && [[ -n "$N" ]] ; then
      case "${this_script}" in
        *stripping*) ;;
        *)  continue ;;
      esac
    fi

    # Append each name of the script files to a list (this will become
    # the names of the targets in the Makefile)
    # The kernfs script must be run as part of SUDO target.
    case "${this_script}" in
      *kernfs) runasroot="$runasroot ${this_script}" ;;
            *) chapter6="$chapter6 ${this_script}${N}" ;;
    esac

    #--------------------------------------------------------------------#
    #         >>>>>>>> START BUILDING A Makefile ENTRY <<<<<<<<          #
    #--------------------------------------------------------------------#
    #
    # Drop in the name of the target on a new line, and the previous target
    # as a dependency. Also call the echo_message function.
    # In the mount of kernel filesystems we need to set LFS
    # and not to use chroot.
    case "${this_script}" in
      *kernfs)  LUSER_wrt_target  "${this_script}" "$PREV" ;;
      *)        CHROOT_wrt_target "${this_script}${N}" "$PREV" ;;
    esac

    # If $pkg_tarball isn't empty, we've got a package...
    # Insert instructions for unpacking the package and changing directories
    if [ "$pkg_tarball" != "" ] ; then
      CHROOT_Unpack "$pkg_tarball"
      # If the testsuites must be run, initialize the log file
      case $name in
        binutils | gcc | glibc )
          [[ "$TEST" != "0" ]] && CHROOT_wrt_test_log "${this_script}${N}"
          ;;
        * )
          [[ "$TEST" = "2" ]] || [[ "$TEST" = "3" ]] && CHROOT_wrt_test_log "${this_script}${N}"
          ;;
      esac
      # If using optimizations, write the instructions
      [[ "$OPTIMIZE" != "0" ]] &&  wrt_optimize "$name" && wrt_makeflags "$name"
    fi

    # In the mount of kernel filesystems we need to set LFS
    # and not to use chroot.
    case "${this_script}" in
      *kernfs)  wrt_RunAsRoot  "$file" ;;
      *)        CHROOT_wrt_RunAsRoot "$file" ;;
    esac

    # Remove the build directory(ies) except if the package build fails.
    if [ "$pkg_tarball" != "" ] ; then
      CHROOT_wrt_RemoveBuildDirs "$name"
    fi

    # Include a touch of the target name so make can check
    # if it's already been made.
    wrt_touch
    #
    #--------------------------------------------------------------------#
    #              >>>>>>>> END OF Makefile ENTRY <<<<<<<<               #
    #--------------------------------------------------------------------#

    # Keep the script file name for Makefile dependencies.
    PREV=${this_script}${N}
    # Set system_build envar for iteration targets
    system_build=$chapter6
  done # end for file in chapter06/*
}

#----------------------------#
chapter78_Makefiles() {
#----------------------------#
  echo "${tab_}${GREEN}Processing... ${L_arrow}Chapter7/8 ( BOOT ) ${R_arrow}"

  for file in chapter0{7,8}/* ; do
    # Keep the script file name
    this_script=`basename $file`

    # Grub must be configured manually.
    # Handle fstab creation.
    # If no .config file is supplied, the kernel build is skipped
    case ${this_script} in
      *grub)    continue ;;
      *fstab)   [[ ! -z ${FSTAB} ]] && cp ${FSTAB} $BUILDDIR/sources/fstab ;;
      *kernel)  [[ -z ${CONFIG} ]] && continue
                cp ${CONFIG} $BUILDDIR/sources/kernel-config  ;;
    esac

    # First append each name of the script files to a list (this will become
    # the names of the targets in the Makefile
    chapter78="$chapter78 ${this_script}"

    #--------------------------------------------------------------------#
    #         >>>>>>>> START BUILDING A Makefile ENTRY <<<<<<<<          #
    #--------------------------------------------------------------------#
    #
    # Drop in the name of the target on a new line, and the previous target
    # as a dependency. Also call the echo_message function.
    CHROOT_wrt_target "${this_script}" "$PREV"

    # Find the bootscripts and kernel package names
    case "${this_script}" in
      *bootscripts)
            name="lfs-bootscripts"
            pkg_tarball=$(get_package_tarball_name $name)
            CHROOT_Unpack "$pkg_tarball"
        ;;
      *kernel)
            name="linux"
            pkg_tarball=$(get_package_tarball_name $name)
            CHROOT_Unpack "$pkg_tarball"
       ;;
    esac

      # Check if we have a real /etc/fstab file
    case "${this_script}" in
      *fstab) if [[ -n $FSTAB ]]; then
                CHROOT_wrt_CopyFstab
              else
                CHROOT_wrt_RunAsRoot "$file"
              fi
        ;;
      *)        CHROOT_wrt_RunAsRoot "$file"
        ;;
    esac

    case "${this_script}" in
      *bootscripts)  CHROOT_wrt_RemoveBuildDirs "dummy" ;;
      *kernel)       CHROOT_wrt_RemoveBuildDirs "dummy" ;;
    esac

    # Include a touch of the target name so make can check
    # if it's already been made.
    wrt_touch
    #
    #--------------------------------------------------------------------#
    #              >>>>>>>> END OF Makefile ENTRY <<<<<<<<               #
    #--------------------------------------------------------------------#

    # Keep the script file name for Makefile dependencies.
    PREV=${this_script}
  done  # for file in chapter0{7,8}/*

}



#----------------------------#
build_Makefile() {           #
#----------------------------#

  echo "Creating Makefile... ${BOLD}START${OFF}"

  cd $JHALFSDIR/${PROGNAME}-commands

  # Start with a clean Makefile.tmp file
  >$MKFILE

  chapter4_Makefiles
  chapter5_Makefiles
  chapter6_Makefiles
  # Add the iterations targets, if needed
  [[ "$COMPARE" = "y" ]] && wrt_compare_targets
  chapter78_Makefiles
  # Add the BLFS_TOOL targets, if needed
  [[ "$BLFS_TOOL" = "y" ]] && wrt_blfs_tool_targets

  # Add a header, some variables and include the function file
  # to the top of the real Makefile.
  wrt_Makefile_header

  # Add chroot commands
  CHROOT_LOC="`whereis -b chroot | cut -d " " -f2`"
  i=1
  for file in chapter06/*chroot* ; do
    chroot=`cat $file | \
            sed -e "s@chroot@$CHROOT_LOC@" \
                -e '/#!\/bin\/bash/d' \
                -e 's@ \\\@ @g' | \
            tr -d '\n' | \
            sed -e 's/  */ /g' \
                -e 's|\\$|&&|g' \
                -e 's|exit||g' \
                -e 's|$| -c|' \
                -e 's|"$$LFS"|$(MOUNT_PT)|' \
                -e 's|set -e||' \
                -e 's|set +h||'`
    echo -e "CHROOT$i= $chroot\n" >> $MKFILE
    i=`expr $i + 1`
  done

  # Drop in the main target 'all:' and the chapter targets with each sub-target
  # as a dependency.
(
    cat << EOF

all:	ck_UID mk_SETUP mk_LUSER mk_SUDO mk_CHROOT mk_BOOT create-sbu_du-report mk_BLFS_TOOL
	@sudo make do_housekeeping
	@echo "$VERSION - jhalfs build" > lfs-release && \\
	sudo mv lfs-release \$(MOUNT_PT)/etc
	@\$(call echo_finished,$VERSION)

ck_UID:
	@if [ \`id -u\` = "0" ]; then \\
	  echo "--------------------------------------------------"; \\
	  echo "You cannot run this makefile from the root account"; \\
	  echo "--------------------------------------------------"; \\
	  exit 1; \\
	fi

mk_SETUP:
	@\$(call echo_SU_request)
	@sudo make SHELL=/bin/bash SETUP
	@touch \$@

mk_LUSER: mk_SETUP
	@\$(call echo_SULUSER_request)
	@( sudo \$(SU_LUSER) "source .bashrc && cd \$(MOUNT_PT)/\$(SCRIPT_ROOT) && make SHELL=/bin/bash  LUSER" )
	@sudo make restore-luser-env
	@touch \$@

mk_SUDO: mk_LUSER
	@sudo make SHELL=/bin/bash  SUDO
	touch \$@
#
# The convoluted piece of code below is necessary to provide 'make' with a valid shell in the
# chroot environment. (Unless someone knows a different way)
# Manually create the /bin directory and provide link to the /tools dir.
# Also change the original symlink creation to include (f)orce to prevent failure due to
#  pre-existing links.
#
mk_CHROOT: mk_SUDO
	@if [ ! -e \$(MOUNT_PT)/bin ]; then \\
	  mkdir \$(MOUNT_PT)/bin; \\
	  cd \$(MOUNT_PT)/bin && \\
	  ln -sf /tools/bin/bash bash; ln -sf bash sh; \\
	  sudo chown -R 0:0 \$(MOUNT_PT)/bin; \\
	fi;
	@sudo sed -e 's|^ln -sv |ln -svf |' -i \$(CMDSDIR)/chapter06/*-createfiles
	@\$(call echo_CHROOT_request)
	@( sudo \$(CHROOT1) "cd \$(SCRIPT_ROOT) && make CHROOT")
	@touch \$@

mk_BOOT: mk_CHROOT
	@\$(call echo_CHROOT_request)
	@( sudo \$(CHROOT2) "cd \$(SCRIPT_ROOT) && make BOOT")
	@touch \$@

mk_BLFS_TOOL: create-sbu_du-report
	@\$(call echo_PHASE,Building BLFS-TOOLS)
	@if [ "\$(ADD_BLFS_TOOLS)" = "y" ]; then \\
	  sudo mkdir -p $BUILDDIR$TRACKING_DIR; \\
	  sudo \$(CHROOT2) "cd \$(SCRIPT_ROOT) && make BLFS_TOOL"; \\
	fi;
	@touch \$@


SETUP:     $chapter4
LUSER:     $chapter5
SUDO:      $runasroot
CHROOT:    $chapter6
BOOT:      $chapter78
BLFS_TOOL: $blfs_tool


create-sbu_du-report:  mk_BOOT
	@\$(call echo_message, Building)
	@if [ "\$(ADD_REPORT)" = "y" ]; then \\
	  ./create-sbu_du-report.sh logs $VERSION; \\
	  \$(call echo_report,$VERSION-SBU_DU-$(date --iso-8601).report); \\
	fi;
	@touch  \$@

restore-luser-env:
	@\$(call echo_message, Building)
	@if [ -f /home/\$(LUSER)/.bashrc.XXX ]; then \\
		mv -f /home/\$(LUSER)/.bashrc.XXX /home/\$(LUSER)/.bashrc; \\
	fi;
	@if [ -f /home/\$(LUSER)/.bash_profile.XXX ]; then \\
		mv /home/\$(LUSER)/.bash_profile.XXX /home/\$(LUSER)/.bash_profile; \\
	fi;
	@chown \$(LUSER):\$(LGROUP) /home/\$(LUSER)/.bash* && \\
	touch \$@ && \\
	echo " "\$(BOLD)Target \$(BLUE)\$@ \$(BOLD)OK && \\
	echo --------------------------------------------------------------------------------\$(WHITE)

do_housekeeping:
	@-umount \$(MOUNT_PT)/sys
	@-umount \$(MOUNT_PT)/proc
	@-umount \$(MOUNT_PT)/dev/shm
	@-umount \$(MOUNT_PT)/dev/pts
	@-umount \$(MOUNT_PT)/dev
	@-rm /tools
	@-if [ ! -f luser-exist ]; then \\
		userdel \$(LUSER); \\
		rm -rf /home/\$(LUSER); \\
	fi;


EOF
) >> $MKFILE

  # Bring over the items from the Makefile.tmp
  cat $MKFILE.tmp >> $MKFILE
  rm $MKFILE.tmp
  echo "Creating Makefile... ${BOLD}DONE${OFF}"
}