#!/bin/sh
#
# Author: Pekka Riikonen <priikone@silcnet.org>
#
# Copyright (C) 2005 Pekka Riikonen
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
#   1. Redistributions of source code must retain the above copyright
#      notice, this list of conditions and the following disclaimer.
#   2. Redistributions in binary form must reproduce the above copyright
#      notice, this list of conditions and the following disclaimer in the
#      documentation and/or other materials provided with the distribution.
#   3. The name of the author may not be used to endorse or promote
#      products derived from this software without specific prior written
#      permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
# NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
# TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#

###############################################################################
# Global variables

# Packaging and compressing
ad_gzip=true
ad_bzip2=false
ad_compress=false
ad_zip=false

# Distribution subdirectory
distdir="distdir"
am_distdir=

# This current distribution
distribution=default
distfile=$distribution
dist_version=0.0
package=
bug_report=

# All inherited distributions in this distribution
inherits=

# All distribution defines for this distribution
distdefs=

# All distribution undefines for this distribution
undistdefs=

# All distribution options
options=
opt_template=false
opt_no_dist=false
opt_no_inherit=false

# All includes
includes=

# All excludes
excludes=

# All noprocesses
noprocess=

# All hooks
pre_hooks=
post_hooks=
pre_dist_hooks=
post_dist_hooks=
pre_p_dist_hooks=
post_p_dist_hooks=

# Distribution license and license header
license=
licenseh=

# Whether to output ad_debug information
debug=false

# Autodist version
ver=@VERSION@

###############################################################################
# Configuration file
if test -f "$distdir/autodist.conf"; then
  . $distdir/autodist.conf
fi

DP=$DISTPREFIX


###############################################################################
# Functions

#
# Print out debug information if debugging is enabled.  To enable debugging
# set the global variable "debug" to true value.
#
# Arguments: ad_debug <ad_debug string>
#
ad_debug()
{
  if test x$debug = xtrue; then
    set -f
    echo autodist: $1
    set +f
  fi
}

#
# Prints out error message and exits the script.
#
# Arguments: ad_fatal <error message>
#
ad_fatal()
{
  set -f
  echo autodist: error: $1
  set +f
  exit 1
}

#
# Prints out warning message
#
# Arguments: ad_warning <warning message>
#
ad_warning()
{
  set -f
  echo autodist: warning: $1
  set +f
}

#
# Initializes the Autodist environment, creates default distribution
# directory, and default distribution.
#
# Arguments: ad_initialize
#
ad_initialize()
{
  ad_debug ">ad_initialize"

  # Create default distdir
  if test '!' -f $distdir; then
    mkdir -p $distdir
  fi

  # Create Autodist configuration file
  if test -f @AUTODISTDIR@/autodist.conf; then
    cp -p @AUTODISTDIR@/autodist.conf $distdir
  fi

  # Create default distribution
  if test -f @AUTODISTDIR@/default; then
    cp -p @AUTODISTDIR@/default $distdir
  fi

  ad_debug "<ad_initialize"
}

#
# Creates the distdefs header file including defined distdefs
#
# Arguments: ad_create_distdefs_h
#
ad_create_distdefs_h()
{
  ad_debug ">ad_create_distdefs_h"

  fname=$DISTDEFS
  rm -f $fname
  echo "/*" > $fname
  echo "  Automatically generated by Autodist $ver.  Do not edit." >> $fname
  echo >> $fname
  echo "  Generated: `date` by `whoami`" >> $fname
  echo "  Distribution: $distribution" >> $fname
  echo "  License: $license" >> $fname
  echo "*/" >> $fname
  echo >> $fname
  echo "#ifndef _"$DP"_DISTDEFS_H" >> $fname
  echo "#define _"$DP"_DISTDEFS_H" >> $fname
  echo >> $fname

  for i in $distdefs
  do
    echo "#define $i 1" >>$fname
  done

  echo >> $fname
  echo "#endif /* _"$DP"_DISTDEFS_H */" >> $fname

  ad_debug "<ad_create_distdefs_h"
}

#
# Creates the main configure script for the distribution.  This runs
# the aclocal, autoheader and autoconf tools.
#
# Arguments: ad_make_configure
#
ad_make_configure()
{
  local run_autoconf=false

  ad_debug ">ad_make_configure"

  rm -f configure

  if test "$ACLOCAL"; then
    ad_debug "Running aclocal"
    $ACLOCAL 1>/dev/null 2>/dev/null
    if test $? != 0; then
      ad_fatal "aclocal failed"
    fi
  fi

  if test "$AUTOCONF"; then
    ad_debug "Running autoconf"
    $AUTOCONF
    if test $? != 0; then
      ad_fatal "autoconf failed"
    fi
    run_autoconf=true
  fi

  if test "$AUTOHEADER"; then
    ad_debug "Running autoheader"
    $AUTOHEADER
    if test $? != 0; then
      ad_fatal "autoheader failed"
    fi
  fi

  if test "$LIBTOOLIZE"; then
    ad_debug "Running libtoolize"
    $LIBTOOLIZE
    if test $? != 0; then
      ad_fatal "libtoolize failed"
    fi
  fi

  if test x$run_autoconf = xtrue; then
    if test '!' -f configure; then
      ad_fatal "creating configure script failed"
    fi
  fi

  ad_debug "<ad_make_configure"
}

#
# Creates the configure.ac script from the configure.ad fragments in
# the source tree.  Takes the source configure file as argument which
# is used to create the actual configure.ac.
#
# Arguments: ad_make_configure_ac <configure_ac_source>
#
ad_make_configure_ac()
{
  local check

  ad_debug ">ad_make_configure_ac: $1"

  if test '!' -f $1; then
    ad_fatal "The configure file '$1' does not exist"
  fi

  check="`cat $1 | sed 's/^[ 	]*//' | grep -v "^#" | grep -e "AD_INIT"`"
  if test -z $check; then
    rm -f configure.ad.cfs
    rm -f $fname $fname.tmp
    ad_fatal "The 'AD_INIT' macro has not been set in configure.ac"
  fi

  rm -f configure.ac configure.ad.cfs

  cfs=`find . -name configure\*\.ad`
  for i in $cfs
  do
    if test "x$i" = "x$1"; then
      continue
    fi
    ad_debug "including $i"
    cat $i >> configure.ad.cfs
  done

  if test -f configure.ad.cfs; then
    check="`cat $1 | sed 's/^[ 	]*//' | grep -v "^#" | grep -e "AD_INCLUDE_CONFIGURE"`"
    if test -z $check; then
      rm -f configure.ad.cfs
      ad_warning "configure.ad fragments found but 'AD_INCLUDE_CONFIGURE' is not set"
    fi
  fi

  # Header for configure.ac
  fname="configure.tmp.ac"
  echo "# Automatically generated by Autodist $ver.  Do not edit." > $fname
  echo "# To make changes edit the configure.ad file in the source tree." >> $fname
  echo >> $fname
  echo "# Source: configure.ad" >> $fname
  echo "# Generated: `date` by `whoami`" >> $fname
  echo "# Distribution: $distribution" >> $fname
  echo "# License: $license" >> $fname
  echo >> $fname

  ad_debug "creating configure.ac"
  if test -f configure.ad.cfs; then
    sed '/AD_INCLUDE_CONFIGURE/ r configure.ad.cfs' $1 > $fname.tmp
    sed -e "/AD_INCLUDE_CONFIGURE/s///" $fname.tmp >> $fname
    rm -f configure.ad.cfs $fname.tmp
  else
    cat $1 >> $fname.tmp
  fi

  # Process AD_INIT
  sed -e "/AD_INIT/s//AC_INIT([$distribution], [$dist_version], [$bug_report], [$package])/" $fname > $fname.tmp

  # Process for distribution
  rm -f $fname
  ad_process_file $fname.tmp $fname

  # Remove any trailing backslashes
  if test -f "$fname"; then
    cat $fname | sed -e :a -e '/\\$/N; s/\\\n//; ta' > configure.ac
  else
    cp -p $fname.tmp configure.ac
  fi
  rm -f $fname $fname.tmp

  ad_debug "<ad_make_configure_ac: $1"
}

#
# Creates the Makefile.in files by running the automake tool.
#
# Arguments: ad_make_makefile_ins
#
ad_make_makefile_ins()
{
  ad_debug ">ad_make_makefile_ins"

  if test "$AUTOMAKE"; then
    ad_debug "Running automake"
    $AUTOMAKE
    if test $? != 0; then
      ad_fatal "automake failed"
    fi
  fi

  ad_debug "<ad_make_makefile_ins"
}

#
# Creates the Makefile.am files from the Makefile.ad files in the
# source tree.  This runs the distribution specific processing for the
# Makefile.ad files.
#
# Arguments: ad_make_makefile_ams
#
ad_make_makefile_ams()
{
  ad_debug ">ad_make_makefile_ams"

  files=`find . -name Makefile\.ad`
  for ff in $files
  do
    fname=`echo $ff | sed s/\.ad//`

    # Header for the Makefile.am
    echo "# Automatically generated by Autodist $ver from Makefile.ad.  Do not edit." > $fname.am
    echo "# To make changes edit the $ff file in the source tree." >> $fname.am
    echo >> $fname.am
    echo "# Source: $ff" >> $fname.am
    echo "# Generated: `date` by `whoami`" >> $fname.am
    echo "# Distribution: $distribution" >> $fname.am
    echo "# License: $license" >> $fname.am
    echo >> $fname.am

    # Run the distribution processing for this Makefile.ad
    ad_debug "Processing $ff to be $fname.am"
    ad_process_file $ff $fname.tmp

    # Remove any trailing backslashes
    if test -f "$fname.tmp"; then
      cat $fname.tmp | sed -e :a -e '/\\$/N; s/\\\n//; ta' >> $fname.am
    else
      cat $ff >> $fname.am
    fi

    rm -f $fname.tmp
  done

  ad_debug "<ad_make_makefile_ams"
}

#
# Processes all files with .ad suffix, with exception of configure*.ad
# and Makefile.ad files, for distribution from the source tree.
#
# Arguments: ad_process_ads
#
ad_process_ads()
{
  ad_debug ">ad_process_ads"

  files=`find . -name \*\.ad \! -name configure\*\.ad \! -name Makefile\.ad`
  for i in $files
  do
    fname=`echo $i | sed s/\.ad//`

    # Header
    echo "# Automatically generated by Autodist $ver.  Do not edit." > $fname
    echo "# To make changes edit the $i file in the source tree." >> $fname
    echo >> $fname
    echo "# Source: $i" >> $fname
    echo "# Generated: `date` by `whoami`" >> $fname
    echo "# Distribution: $distribution" >> $fname
    echo "# License: $license" >> $fname
    echo >> $fname

    # Run the distribution processing for this file
    ad_debug "Processing $i to be $fname"
    ad_process_file $i $fname
  done

  ad_debug "<ad_process_ads"
}

#
# Includes files specified in the distribution for inclusion.  Used when
# creating the distribution for packaging.
#
# include has the following format in distfile:
#
#   include <path> [<dest path>]
#
# If only source path, which may be file, directory or regular expression,
# is specified the path will be same in distribution.  If the destination
# path is specified that will be the new name and/or new location of the
# source path.  This, in effect, is a cp utility with ability to create
# directories if they do not exist.
#
# Arguments: ad_dist_includes <includeslist> <recursive>
#
ad_dist_includes()
{
  local incs

  ad_debug ">ad_dist_includes: $1 $2"

  # By default do not expand pathnames
  set -f

  # Add : separator at the end
  incs="`echo "$1" | sed 's/$/ : /'`"

  src=
  dst=
  for i in $incs
  do
    if test "$i" = ":" && test -z "$src"; then
      continue
    fi
    if test -z "$src"; then
      src=$i
      continue
    fi
    if test -z "$dst" && test "$i" != ":"; then
      dst=$i
    else
      dst=$src
    fi

    ad_debug "Including $src into $dst"

    if test -f "$src"; then
      # Add file

      if test "$src" = "$dst"; then
        # Add to same location
        d=`echo $src | sed 's,/[^/]*$,,'`
        if test "$d" != "$src" && test "$d" != "." && \
	   test '!' -d $am_distdir/$d; then
          mkdir -p $am_distdir/$d || exit 1
        fi
      else
        # Add to different location
        check=`echo "$dst" | sed 's/?//; s/*//; s/\[//; s/\]//'`
        if test "$check" != "$dst"; then
          ad_fatal "Invalid destination in 'include $src $dst'"
        fi

        d=`echo $dst | sed 's,/[^/]*$,,'`
        if test "$d" != "$dst" && test "$d" != "." && \
	   test '!' -d $am_distdir/$d; then
          mkdir -p $am_distdir/$d || exit 1
        fi
      fi

      cp -p $src $am_distdir/$d || exit 1

    elif test -d "$src"; then
      # Add directory

      if test "$src" = "$dst"; then
	# Add to same location
        d=`echo $src | sed 's,/[^/]*$,,'`
        ds=`echo $src | sed 's/\/$//'`
        if test "$ds" = "$d"; then
          d=`echo $d | sed 's,/[^/]*$,,'`
        fi
        if test '!' -d $am_distdir/$d && test "$ds" != "$d"; then
          mkdir -p $am_distdir/$d || exit 1
        fi

        cp -pR $src $am_distdir/$d || exit 1
      else
	# Add to different location
        check=`echo "$dst" | sed 's/?//; s/*//; s/\[//; s/\]//'`
        if test "$check" != "$dst"; then
          ad_fatal "Invalid destination in 'include $src $dst'"
        fi

        d=`echo $dst | sed 's,/[^/]*$,,'`
        ds=`echo $dst | sed 's/\/$//'`
        if test "$ds" = "$d"; then
          d=`echo $d | sed 's,/[^/]*$,,'`
        fi
        if test '!' -d $am_distdir/$d && test "$dst" != "$d"; then
          mkdir -p $am_distdir/$d || exit 1
        fi

        cp -pR $src $am_distdir/$dst || exit 1
      fi

    elif test x$2 != xtrue; then
      # We assume regular expression in filename
      check=`echo "$src" | sed 's/?//; s/*//; s/\[//; s/\]//'`
      if test "$check" == "$src"; then
	if test '!' -a $src; then
	  ad_fatal "Including $src: No such file or directory"
	fi
	src=
	dst=
	continue
      fi

      # Recursively call this function with expanded pathnames.  The
      # reason why we don't let sh by default expand patnames is that
      # the include's destination is optional.  If sh expands by default
      # we don't know the destination.  For this reason, we handle the
      # expansion here ourselves.

      # If src and dst are same, then expand the pathname as we'll copy
      # matches to their own locations.
      if test "$src" = "$dst"; then
	# Expand pathnames, and format to our include format
	set +f
	srcs=`echo $src | sed -e 's/ / : /g' -e 's/^/ : /'` || exit 1
	set -f
      else
	# Destination is new, and it has to be a directory.
	check=`echo "$dst" | sed 's/?//; s/*//; s/\[//; s/\]//'`
	if test "$check" != "$dst"; then
	  ad_fatal "Invalid destination in 'include $src $dst'"
	fi

	# Make sure dst has / at the end, as this must be a directory
	dst=`echo $dst | sed 's/\/$//; s/$/\//'`

	# Escape dst for sed
	dste=`echo $dst | sed 's/\\//\\\\\//g'` || exit 1

	# Expand pathnames, and format to our include format
	set +f
	srcs=`echo $src | sed -e "s/ / $dste : /g" \
	  -e 's/^/ : /' -e "s/$/ $dste/"` || exit 1
	set -f
      fi

      # Include recursively
      ad_dist_includes "$srcs" true

    elif test '!' -a $src; then
      ad_fatal "Including $src: No such file or directory"
    fi

    src=
    dst=
  done

  set +f

  ad_debug "<ad_dist_includes: $1 $2"
}

#
# Excludes files specified in the distribution for exclusion.  Used when
# creating the distribution for packaging.
#
# exclude has the following format in distfile:
#
#  exclude <path>
#
# The path may be file, directory or regular expression.
#
# Arguments: ad_dist_includes <excludelist>
#
ad_dist_excludes()
{
  ad_debug ">ad_dist_excludes: $1"

  for i in $1
  do
    ad_debug "Excluding $i"
    rm -rf $am_distdir/$i
  done

  ad_debug "<ad_dist_excludes: $1"
}

#
# Processes the entire tree for distribution.  This inspects files other
# than source and header files, with exception of any file with .ad
# suffix, and performs distribution processing for the file.  The original
# file is replaced with the processed file.  This function is used when
# creating the distribution for packaging.
#
# Arguments: ad_process_tree <directory>
#
ad_process_tree()
{
  ad_debug ">ad_process_tree: $1"

  # We take all files, other than *.ad, including source files, in case
  # they use the non-C-compiler-friendly format of distdefs, which is
  # possible.

  files=`find $am_distdir \! -name \*\.ad`
  files=`echo $files | sed 's/$am_distdir//'`

  # Take away noprocess list
  if test -f autodist.noprocess; then
    files=`echo $files | sh autodist.noprocess` || exit 1
  fi

  for ff in $files
  do
    ad_process_file $ff $ff.tmp
    if test -f $ff.tmp; then
      rm -f $ff || exit 1
      mv -f $ff.tmp $ff || exit 1
    fi
  done

  ad_debug "<ad_process_tree: $1"
}

#
# Processes the entire source tree for distribution.  This inspects files
# in the source tree, with exception of any file with .ad suffix, and
# performs distribution processing for the file.  The original file is
# replaced with the processed file.  This function is used when creating
# the distribution for packaging.
#
# Call this before ad_process_tree().
#
# Arguments: ad_process_source_tree <directory>
#
ad_process_source_tree()
{
  ad_debug ">ad_process_source_tree: $1"

  # We take only C/C++ files since they use the C compiler friendly
  # version of distdefs.  Other files are not assumed to use them.
  files=`find $am_distdir \! -name \*\.ad \( \
 	-name \*\.[cC] -o \
 	-name \*\.[cC][cCpP] -o \
 	-name \*\.[cC][xX][xX] -o \
 	-name \*\.[cC][pP][pP] -o \
 	-name \*\.[cC]++ -o \
 	-name \*\.m -o \
 	-name \*\.[hH] -o \
 	-name \*\.hh \)`

  # Take away noprocess list
  if test -f autodist.noprocess; then
    files=`echo $files | sh autodist.noprocess` || exit 1
  fi

  for ff in $files
  do
    ad_process_source_file $ff $ff.tmp
    if test -f $ff.tmp; then
      rm -f $ff || exit 1
      mv -f $ff.tmp $ff || exit 1
    fi
  done

  ad_debug "<ad_process_source_tree: $1"
}

#
# Makes distribution sane, ala modtimes.  Since we modify the distribution
# we need to make it sane after that.
#
# Arguments: ad_makedist_makesane
#
ad_makedist_makesane()
{
  ad_debug ">ad_makedist_makesane:"

  # DO NOT change these order unless you know what you are doing.
  if test -f $am_distdir/configure.ac; then
    touch $am_distdir/configure.ac
  fi

  if test -f $am_distdir/aclocal.m4; then
    touch $am_distdir/aclocal.m4
  fi

  if test '!' -f Makefile; then
    ad_fatal "Makefile: No such file or directory"
  fi

  configh=`grep "^CONFIG_HEADER" Makefile | cut -d= -f2 | sed 's/^[ \t]//'`
  touch $am_distdir/$configh.in 1>/dev/null 2>/dev/null

  files=`find $am_distdir -name Makefile\.in`
  for i in $files
  do
    touch $i
  done

  if test -f $am_distdir/configure; then
    touch $am_distdir/configure
  fi

  if test -f $am_distdir/config.status; then
    touch $am_distdir/config.status
  fi

  ad_debug "<ad_makedist_makesane:"
}

#
# Creates distribution of the source tree.  All files in the distribution
# will be processed and the distribution will be packaged.
#
# Arguments: ad_makedist
#
ad_makedist()
{
  ad_debug ">ad_makedist"

  if test '!' -f autodist.dist; then
    ad_fatal "Autodist has not been run yet to prepare source tree"
  fi

  if test -z $MAKE; then
    ad_fatal "The MAKE variable is not set in autodist.conf"
  fi

  # Get distdir from Makefile
  if test '!' -f Makefile; then
    ad_fatal "The source tree is not configured, run ./configure first"
  fi

  # Parse the requested distribution
  distribution=`cat autodist.dist | grep "dist:" | cut -d: -f2`
  dist_version=`cat autodist.dist | grep "ver:" | cut -d: -f2`
  ad_parse_distribution $distribution false
  ad_process_distdefs
  am_distdir="$package-$dist_version"

  if test x$opt_no_dist = xtrue; then
    ad_fatal "The '$distribution' distribution cannot be packaged"
  fi

  # Run pre-dist-hooks
  ad_run_dist_hooks "$pre_dist_hooks"

  # Create distribution directory
  ad_debug "Creating distribution directory $am_distdir"
  $MAKE distdir || exit 1
  chmod -R a+r $am_distdir

  if test '!' -d $am_distdir; then
    ad_fatal "Distribution directory $am_distdir not created"
  fi

  # Run pre-process-dist-hooks
  ad_run_dist_hooks "$pre_p_dist_hooks"

  # Run excludes
  ad_dist_excludes "$excludes"

  # Run includes
  ad_dist_includes "$includes"

  # Include specific license file if specified
  if test "$license" != ""; then
    cp -p $license $am_distdir/COPYING || exit 1
  fi

  # Process noprocesses
  ad_process_noprocess

  # Process source files
  ad_debug "Process distribution source tree"
  ad_process_source_tree $am_distdir

  # Process non-source files
  ad_debug "Process distribution tree"
  ad_process_tree $am_distdir

  # Run post-process_dist-hooks
  ad_run_dist_hooks "$post_p_dist_hooks"

  # Make distribution sane
  ad_makedist_makesane

  # Package
  ad_debug "Packaging distribution"
  tar chof $am_distdir.tar $am_distdir || exit 1

  # Compress
  ad_debug "Compressing distribution package"
  if test x$ad_gzip = xtrue; then
    gzip -9 -c $am_distdir.tar > $am_distdir.tar.gz || exit 1
  fi
  if test x$ad_bzip2 = xtrue; then
    bzip2 -9 -c $am_distdir.tar > $am_distdir.tar.bz2 || exit 1
  fi
  if test x$ad_compress = xtrue; then
    compress -c $am_distdir.tar > $am_distdir.tar.Z || exit 1
  fi
  if test x$ad_zip = xtrue; then
    rm -f $am_distdir.zip
    zip -rq $am_distdir.zip $am_distdir || exit 1
  fi
  rm -f $am_distdir.tar

  # Run post-dist-hooks
  ad_run_dist_hooks "$post_dist_hooks"

  # Cleanup
  rm -rf $am_distdir
  rm -f autodist.noprocess

  ad_debug "<ad_makedist"
}

#
# Handles distribution options.
#
# option has the following format in distfile:
#
#   option <option>
#
# Following options are supported:
#
#   template
#   no-dist
#   no-inherit
#
# Arguments: ad_handle_options <options>
#
ad_handle_options()
{
  ad_debug ">ad_handle_options: $1"

  for i in $1
  do
    if test "$i" = "template"; then
      opt_template=true
      continue
    elif test "$i" = "no-dist"; then
      opt_no_dist=true
      continue
    elif test "$i" = "no-inherit"; then
      opt_no_inherit=true
      continue
    fi
  done

  ad_debug "<ad_handle_options: $1"
}

#
# Clears set options
#
# Arguments: ad_clear_options
#
ad_clear_options()
{
  ad_debug ">ad_clear_options"
  opt_template=false
  opt_no_dist=false
  opt_no_inherit=false
  ad_debug "<ad_clear_options"
}

#
# Parses the distribution.  Gets all distribution defines from the
# distribution.  This also expands all inherited distributions recursively
# to get all inherited distribution defines.  From inherited distributions
# their name and package name is not inherited.
#
# Arguments: ad_parse_distribution <distribution name> <inherit>
#
ad_parse_distribution()
{
  local inhs
  local defs
  local undefs
  local incs
  local excs
  local nops
  local opts
  local dname
  local dpname
  local bugr
  local prh
  local poh
  local prdh
  local podh
  local prpdh
  local popdh

  ad_debug ">ad_parse_distribution: $1 $2"

  if test '!' -f $distdir/$1; then
    ad_fatal "Distribution '$1' is not declared"
  fi

  # Get inherited
  inhs=`cat $distdir/$1 | sed 's/^[ 	]*//' | grep -v "^#" \
    | grep "inherit " | cut -d' ' -f2 | sort | uniq`

  # Get distdefs
  defs=`cat $distdir/$1 | sed 's/^[       ]*//' | grep -v "^#" \
   | grep "define " | cut -d' ' -f2 | sort | uniq`

  if test "$inhs" = "" && test "$defs" = ""; then
    ad_fatal "Distribution '$1' does not define anything"
  fi

  # Get undefined distdefs
  undefs=`cat $distdir/$1 | sed 's/^[       ]*//' | grep -v "^#" \
   | grep "undef " | cut -d' ' -f2 | sort | uniq`

  # Get includes
  incs=`cat $distdir/$1 | sed 's/^[       ]*//' | grep -v "^#" \
    | grep "include " | sed 's/include / : /'`

  # Get excludes
  excs=`cat $distdir/$1 | sed 's/^[       ]*//' | grep -v "^#" \
    | grep "exclude " | cut -d' ' -f2- | sort | uniq`

  # Get noprocesses
  nops=`cat $distdir/$1 | sed 's/^[       ]*//' | grep -v "^#" \
    | grep "noprocess " | cut -d' ' -f2- | sort | uniq`

  # Get options
  opts=`cat $distdir/$1 | sed 's/^[       ]*//' | grep -v "^#" \
    | grep "option " | cut -d' ' -f2- | sort | uniq`

  # Check options
  ad_handle_options "$opts"
  if test x$2 = xtrue && test x$opt_no_inherit = xtrue; then
    ad_fatal "Distribution '$1' cannot be inherited"
  fi
  if test x$2 = xfalse && test x$opt_template = xtrue; then
    ad_fatal "Template distribution '$1' cannot be prepared or packaged"
  fi

  ad_debug "inherits=$inhs"
  ad_debug "distdefs=$defs"
  ad_debug "includes=$incs"
  ad_debug "excludes=$excs"
  ad_debug "noprocess=$nops"
  ad_debug "undistdefs=$undefs"
  ad_debug "options=$opts"

  # Expand distdefs from inherited distributions
  for i in $inhs
  do
    if test x$1 = x$i; then
      ad_fatal "Infinite recursion detected.  Fix the '$distdir/$1' \
            distribution to not have 'inherit $i' declared."
    fi

    if test '!' -f $distdir/$i; then
      ad_fatal "Distribution '$i' is not declared (inherited from '$1')"
    fi

    ad_parse_distribution $i true
    ad_clear_options
  done

  # Get license
  license=`cat $distdir/$1 | sed 's/^[       ]*//' | grep -v "^#" \
    | grep "license " | cut -d' ' -f2`
  licenseh=`cat $distdir/$1 | sed 's/^[       ]*//' | grep -v "^#" \
    | grep "license-header " | sed 's/license-header / : /'`

  ad_debug "license=$license"
  ad_debug "licenseh=$licenseh"

  if test x$2 = xfalse; then
    # Get distribution name
    dname=`cat $distdir/$1 | sed 's/^[       ]*//' | grep -v "^#" \
      | grep "name " | cut -d' ' -f2-`

    if test "$dname"; then
      distribution=$dname
    fi

    # Get distribution package name (optional)
    dpname=`cat $distdir/$1 | sed 's/^[       ]*//' | grep -v "^#" \
     | grep "package " | cut -d' ' -f2`

    if test "$dpname"; then
      package=$dpname
    else
      package=$distribution
    fi

    # Get Bug-report email address (optional)
    bugr=`cat $distdir/$1 | sed 's/^[       ]*//' | grep -v "^#" \
     | grep "bug-report " | cut -d' ' -f2-`

    if test "$bugr"; then
      bug_report=$bugr
    fi

    ad_debug "distribution=$distribution"
    ad_debug "package=$package"
    ad_debug "bug-report=$bug_report"

    # Get hooks (optional)
    prh=`cat $distdir/$1 | sed 's/^[       ]*//' | grep -v "^#" \
     | grep "pre-hook " | cut -d' ' -f2-`
    poh=`cat $distdir/$1 | sed 's/^[       ]*//' | grep -v "^#" \
     | grep "post-hook " | cut -d' ' -f2-`
    prdh=`cat $distdir/$1 | sed 's/^[       ]*//' | grep -v "^#" \
     | grep "pre-dist-hook " | sed 's/^[       ]*//' | cut -d' ' -f2-`
    podh=`cat $distdir/$1 | grep -v "^#" \
     | grep "post-dist-hook " | sed 's/^[       ]*//' | cut -d' ' -f2-`
    prpdh=`cat $distdir/$1 | sed 's/^[       ]*//' | grep -v "^#" \
     | grep "pre-process-dist-hook " | sed 's/^[       ]*//' | cut -d' ' -f2-`
    popdh=`cat $distdir/$1 | grep -v "^#" \
     | grep "post-process-dist-hook " | sed 's/^[       ]*//' | cut -d' ' -f2-`

    pre_hooks="$pre_hooks $prh"
    post_hooks="$post_hooks $poh"
    pre_dist_hooks="$pre_dist_hooks $prdh"
    post_dist_hooks="$post_dist_hooks $podh"
    pre_p_dist_hooks="$pre_p_dist_hooks $prpdh"
    post_p_dist_hooks="$post_p_dist_hooks $popdh"
    options="$options $opts"

    ad_handle_options "$options"
    ad_debug "options=$options"
  fi

  # Return to caller
  inherits="$inherits $inhs"
  distdefs="$distdefs $defs"
  includes="$includes $incs"
  excludes="$excludes $excs"
  noprocess="$noprocess $nops"
  undistdefs="$undistdefs $undefs"

  ad_debug "<ad_parse_distribution: $1 $2"
}

#
# Processes parsed distdefs.  Removes duplicates, and undefined distdefs
# from the distdefs.
#
# Arguments: ad_process_distdefs
#
ad_process_distdefs()
{
  ad_debug ">ad_process_distdefs"

  # Remove all undefined distribution defines
  for i in $undistdefs
  do
    ad_debug "undefining $i distdef"
    distdefs=`echo $distdefs | sed s/$i//`
  done

  rm -f autodist.tmp.defs autodist.pre.hooks autodist.post.hooks
  rm -f autodist.pre.dist.hooks autodist.post.dist.hooks

  # Remove duplicate distdefs
  for i in $distdefs
  do
    echo $i >>autodist.tmp.defs
  done
  distdefs=`cat autodist.tmp.defs | sort | uniq`
  distdefs=`echo $distdefs`
  rm -f autodist.tmp.defs

  ad_debug "distdefs=$distdefs"

  ad_debug "<ad_process_distdefs"
}

#
# Processes for a license header change.
#
# Arguments: ad_process_license_header <scriptfile>
#
ad_process_license_header()
{
  ad_debug ">ad_process_license_header"

  # Add : separator at the end
  lics=`echo "$licenseh" | sed 's/$/ : /'`

  src=
  dst=
  for i in $lics
  do
    if test "$i" = ":" && test -z "$src"; then
      continue
    fi
    if test -z "$src"; then
      src=$i
      continue
    fi
    if test -z "$dst" && test "$i" != ":"; then
      dst=$i
    else
      ad_fatal "Missing argument in 'license-header $src'"
    fi

    ad_debug "Replacing $src license with $dst license"

    if test '!' -f $src; then
      ad_fatal "License header $src: No such file or directory"
    fi

    if test '!' -f $dst; then
      ad_fatal "License header $dst: No such file or directory"
    fi

    # Awk script to replace the license header
    fl=`sed q $src | sed 's/\\//\\\\\//g' > autodist.lsrc` || exit 1
    ll=`sed -n '$p' $src | sed 's/\\//\\\\\//g' > autodist.ldst` || exit 1
    echo "/`cat autodist.lsrc`/,/`cat autodist.ldst`/ { FILE1=\"$src\"; FILE2=\"$dst\"; getline F1 < FILE1; getline F2 < FILE2; if (F1) sub(F1, F2); else { F1=\"\$\"; sub(F1, F2); } }" >> $1
    rm -f autodist.lsrc autodist.ldst

    src=
    dst=
  done

  ad_debug "<ad_process_license_header"
}

#
# Process specified noprocesses.  This is called during makedist.
#
# Arguments: ad_process_noprocess
#
ad_process_noprocess()
{
  local np=false
  local n="sed "

  ad_debug ">ad_process_noprocess"

  for i in $noprocess
  do
    # Escape
    ie=`echo $i | sed 's/\\//\\\\\//g'` || exit 1

    n="$n -e 's/$am_distdir\\/$ie//'"
    np=true
  done

  rm -f autodist.noprocess
  if test x$np = xtrue; then
    echo $n > autodist.noprocess || exit 1
  fi

  ad_debug "<ad_process_noprocess"
}

#
# Process a file given as argument for the distribution.
#
# Arguments: ad_process_file <filepath> <dest_filepath>
#
ad_process_file()
{
  local found=false
  local f
  local defs
  local ndefs

  # Process only regular files
  if test '!' -f $1; then
    return
  fi

  ad_debug ">ad_process_file: $1 $2"

  f="autodist.tmp.script"
  rm -f $f

  # If license header is provided, replace the license header in the file.
  ad_process_license_header $f

  ad_debug "Getting #ifdef's and #ifndef's"

  # Get defined distribution defines
  defs=`awk "/^#ifdef "$DP"_DIST_|^#else "$DP"_DIST_/ { print; }" \
    $1 |cut -d'*' -f2 |cut -d' ' -f2 | sort | uniq`

  # Get explicitly not-defined distribution defines
  ndefs=`awk "/^#ifndef "$DP"_DIST_|^#else !"$DP"_DIST_/ { print; }" \
    $1 |cut -d'*' -f2 |cut -d' ' -f2 | cut -d'!' -f2 | sort | uniq`

  ad_debug "defs=$defs"
  ad_debug "ndefs=$ndefs"

  # Create the script to include and exclude stuff in the file according
  # to the distribution defines

  # ifdefs
  ad_debug "processing ifdefs"
  for d in $defs
  do
    found=false
    for i in $distdefs
    do
      if test x$d = x$i; then
        found=true
        break
      fi
    done

    # If distribution define was not found exclude those lines from the file.
    # This also handles the #ifdef's #else (ie. #ifndef) branch.
    if test x$found = xfalse; then
      ad_debug "ifdef $d will be excluded (it is NOT defined)"
      echo "/^#ifdef $d/,/^#else !$d|^#endif $d/ { next; }" >> $f
    else
      echo "/^#else !$d/,/^#endif $d/ { next; }" >> $f
    fi
  done

  # ifndefs
  ad_debug "processing ifndefs"
  for d in $ndefs
  do
    found=false
    for i in $distdefs
    do
      if test x$d = x$i; then
        found=true
        break
      fi
    done

    # If distribution define was found exclude those lines from the file.
    # This also handles the #ifndef's #else (ie. #ifdef) branch.
    if test x$found = xtrue; then
      ad_debug "ifndef $d will be excluded (it IS defined)"
      echo "/^#ifndef $d/,/^#else $d|^#endif $d/ { next; }" >> $f
    else
      echo "/^#else $d/,/^#endif $d/ { next; }" >> $f
    fi
  done

  # Now process the file with the script
  if test -f $f; then

    # Those distdef lines that remain in the file are removed to make
    # the appearance prettier
    echo "/^#ifdef "$DP"_DIST_|^#endif "$DP"_DIST_|^#else "$DP"_DIST_|^#else !"$DP"_DIST_|^#ifndef "$DP"_DIST_/ { next; }" >> $f
    echo "{ print; }" >> $f

    # Execute the script
    cp -p $1 $2 || exit 1
    awk -f $f $1 > $2 || exit 1
  fi

  rm -f $f

  ad_debug "<ad_process_file: $1 $2"
}

#
# Process a source file given as argument for the distribution.
#
# Arguments: ad_process_source_file <filepath> <dest_filepath>
#
ad_process_source_file()
{
  local found=false
  local f
  local defs
  local ndefs

  # Process only regular files
  if test '!' -f $1; then
    return
  fi

  ad_debug ">ad_process_source_file: $1 $2"

  f="autodist.tmp.script"
  rm -f $f

  # If license header is provided, replace the license header in the file.
  ad_process_license_header $f

  ad_debug "Getting #ifdef's and #ifndef's"

  # Get defined distribution defines
  defs=`awk '/^#ifdef SILC_DIST_|^#else \/\* SILC_DIST_/ { print; }' \
    $1 |cut -d'*' -f2 |cut -d' ' -f2 | sort | uniq`

  # Get explicitly not-defined distribution defines
  ndefs=`awk '/^#ifndef SILC_DIST_|^#else \/\* \!SILC_DIST_/ { print; }' \
    $1 |cut -d'*' -f2 |cut -d' ' -f2 | cut -d'!' -f2 | sort | uniq`

  ad_debug "defs=$defs ndefs=$ndefs"

  # Create the script to include and exclude stuff in the file according
  # to the distribution defines

  # ifdefs
  ad_debug "processing ifdefs"
  for d in $defs
  do
    found=false
    for i in $distdefs
    do
      if test x$d = x$i; then
        found=true
        break
      fi
    done

    # If distribution define was not found exclude those lines from the file.
    # This also handles the #ifdef's #else (ie. #ifndef) branch.
    if test x$found = xfalse; then
      ad_debug "ifdef $d will be excluded (it is NOT defined)"
      echo "/^#ifdef $d/,/^#else \/\* \!$d|^#endif \/\* $d/ { next; }" >> $f
    else
      echo "/^#else \/\* \!$d/,/^#endif \/\* $d/ { next; }" >> $f
    fi
  done

  # ifndefs
  ad_debug "processing ifndefs"
  for d in $ndefs
  do
    found=false
    for i in $distdefs
    do
      if test x$d = x$i; then
        found=true
        break
      fi
    done

    # If distribution define was found exclude those lines from the file.
    # This also handles the #ifndef's #else (ie. #ifdef) branch.
    if test x$found = xtrue; then
      ad_debug "ifndef $d will be excluded (it IS defined)"
      echo "/^#ifndef $d/,/^#else \/\* $d|^#endif \/\* $d/ { next; }" >> $f
    else
      echo "/^#else \/\* $d/,/^#endif \/\* $d/ { next; }" >> $f
    fi
  done

  # Now process the file with the script
  if test -f $f; then

    # Those distdef lines that remain in the file are removed to make
    # the appearance prettier
    echo "/^#ifdef SILC_DIST_|^#endif \/\* SILC_DIST_|^#else \/\* SILC_DIST_|^#else \/\* \!SILC_DIST_|^#ifndef SILC_DIST_/ { next; }" >> $f
    echo "{ print; }" >> $f

    # Execute the script
    cp -p $1 $2 || exit 1
    awk -f $f $1 > $2 || exit 1
  fi

  rm -f $f

  ad_debug "<ad_process_source_file: $1 $2"
}

#
# Run hooks
#
# Arguments: ad_run_hooks <hooks>
#
ad_run_hooks()
{
  ad_debug ">ad_run_hooks: $1"

  for i in $1
  do
    if test '!' -f $i; then
      ad_fatal "Hook script $i does not exist"
    fi
    sh $i $distribution $dist_version $package || exit 1
  done

  ad_debug "<ad_run_hooks: $1"
}

#
# Run dist hooks
#
# Arguments: ad_run_dist_hooks <hooks>
#
ad_run_dist_hooks()
{
  ad_debug ">ad_run_dist_hooks: $1"

  for i in $1
  do
    if test '!' -f $i; then
      ad_fatal "Dist hook script $i does not exist"
    fi
    sh $i $distribution $dist_version $package $am_distdir || exit 1
  done

  ad_debug "<ad_run_dist_hooks: $1"
}

###############################################################################
# Autodist code

usage="Usage: autodist [options] [distribution] [version]"
help="\
Autodist prepares source tree for configuration, compilation and
distribution.  Prepares the source tree from the \`autodist.ad'
configuration file.  Generates Automake.am files from Automake.ad
files, configure.ac file from configure.ad file(s), generates the
configure script by running Autoconf tool, and generates Makefile.in
files by running Automake tool.

Operation modes:
  -h, --help                print this help, then exit
  -V, --version             print version number, then exit
  -v, --verbose             verbosely report processing
  -d, --distdir <dir>       search distributions from <dir>
  -s, --distdefs [<dist>]   print distribution defines of <dist>, then exit
  -i, --init                initialize Autodist environment, create default
                            distribution directory and distribution, then exit
  -m, --makedist            create and package distribution
      --gzip                create package compressed with gzip (default)
      --bzip2               create also package compressed with bzip2
      --compress            create also package compressed with compress
      --zip                 create also package compressed with zip"

#
# Process command line arguments
#
while test $# -gt 0; do
  case "${1}" in

  -d |--distdir)
    shift;
    test $# -eq 0 && { echo "${usage}" 1>&2; exit 1; }
    distdir="${1}";
    shift;;

  --list)
    exit 0;;

  -s | --distdefs)
    shift;
    if test $# -eq 0; then
      ad_parse_distribution $distribution false
      echo "Distribution: ${distribution}" 1>&2;
    else
      ad_parse_distribution $1 false
      echo "Distribution: ${1}" 1>&2;
    fi
    ad_process_distdefs
    echo "Distdefs:" 1>&2;
    echo "${distdefs}";
    exit 0;;

  -i | --init)
    ad_initialize;
    exit 0;;

  -m | --makedist)
    ad_makedist
    exit 0;;

  --gzip)
    ad_gzip=true
    shift;;

  --bzip2)
    ad_bzip2=true
    shift;;

  --compress)
    ad_compress=true
    shift;;

  --zip)
    ad_zip=true
    shift;;

  -v | --verbose)
    debug=true
    shift;;

  -h | --help | --h*)
    echo "${usage}" 1>&2;
    echo 1>&2;
    echo "${help}" 1>&2;
    echo 1>&2;
    exit 0;;

  -V | --version)
    echo "@PACKAGE@ (@PACKAGE_NAME@) $ver" 1>&2;
    echo "Written by Pekka Riikonen" 1>&2;
    echo 1>&2;
    echo "Copyright (C) 2004 - 2005 SILC Project" 1>&2;
    echo "\
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. " 1>&2;
    exit 0;;

  --)
    shift;
    break;;

  -*)
    echo "${usage}" 1>&2;
    exit 1;;

  *)
    break;;

  esac
done

#
# Parse the requested distribution
#
if test $# != 0; then
  distribution="${1}";
  distfile=$distribution
  shift
fi
ad_parse_distribution $distribution false
ad_process_distdefs

if test $# != 0; then
  dist_version="${1}";
fi

ad_debug "Preparing source tree for configuration and compilation..."
ad_debug "Preparing $distribution distribution version $dist_version"

#
# Create the distribution defines header file
#
if test "$DISTDEFS"; then
  ad_create_distdefs_h
else
  ad_fatal "DISTDEFS not defined in $distdir/autodist.conf"
fi

#
# Run pre-hooks
#
ad_run_hooks "$pre_hooks"

#
# Generate the Makefile.am files from Makefile.ad files
#
ad_make_makefile_ams

#
# Generate the configure.ac from configure.ad file(s)
#
ad_make_configure_ac ./configure.ad

#
# Process all files with .ad suffix for distribution processing
#
ad_process_ads

#
# Generate configure script
#
ad_make_configure

#
# Generate Makefile.in files
#
ad_make_makefile_ins

#
# Create autodist.dist
#
ad_debug "Creating autodist.dist"
echo "dist:$distfile" > autodist.dist
echo "ver:$dist_version" >> autodist.dist
echo "$package-$dist_version" >> autodist.dist

#
# Run post-hooks
#
ad_run_hooks "$post_hooks"

ad_debug "Done, now run ./configure and make."
exit 0