bootstrap - toolchain/sed - Git at Google

 #! /bin/sh

 # Bootstrap this package from checked-out sources.

 # Copyright (C) 2003-2008 Free Software Foundation, Inc.

 # 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/>.

 # Written by Paul Eggert.

 nl='
 '

 # Ensure file names are sorted consistently across platforms.
 LC_ALL=C
 export LC_ALL

 local_gl_dir=gl

 # Temporary directory names.
 bt='._bootmp'
 bt_regex=`echo "$bt"| sed 's/\./[.]/g'`
 bt2=${bt}2

 usage() {
   echo >&2 "\
 Usage: $0 [OPTION]...
 Bootstrap this package from the checked-out sources.

 Options:
  --gnulib-srcdir=DIRNAME  Specify the local directory where gnulib
                           sources reside.  Use this if you already
                           have gnulib sources on your machine, and
                           do not want to waste your bandwidth downloading
                           them again.
  --copy                   Copy files instead of creating symbolic links.
  --force                  Attempt to bootstrap even if the sources seem
                           not to have been checked out.
  --skip-po                Do not download po files.

 If the file $0.conf exists in the same directory as this script, its
 contents are read as shell variables to configure the bootstrap.

 Running without arguments will suffice in most cases.
 "
 }

 # Configuration.

 # Name of the Makefile.am
 gnulib_mk=gnulib.mk

 # List of gnulib modules needed.
 gnulib_modules=

 # Any gnulib files needed that are not in modules.
 gnulib_files=

 # The command to download all .po files for a specified domain into
 # a specified directory.  Fill in the first %s is the domain name, and
 # the second with the destination directory.  Use rsync's -L and -r
 # options because the latest/%s directory and the .po files within are
 # all symlinks.
 po_download_command_format=\
 "rsync -Lrtvz 'translationproject.org::tp/latest/%s/' '%s'"

 extract_package_name='
   /^AC_INIT(/{
      /.*,.*,.*, */{
        s///
        s/[][]//g
        s/)$//
        p
        q
      }
      s/AC_INIT(\[*//
      s/]*,.*//
      s/^GNU //
      y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/
      s/[^A-Za-z0-9_]/-/g
      p
   }
 '
 package=`sed -n "$extract_package_name" configure.ac` || exit
 gnulib_name=lib$package

 build_aux=build-aux
 source_base=lib
 m4_base=m4
 doc_base=doc
 tests_base=tests

 # Extra files from gnulib, which override files from other sources.
 gnulib_extra_files="
 	$build_aux/install-sh
 	$build_aux/missing
 	$build_aux/mdate-sh
 	$build_aux/texinfo.tex
 	$build_aux/depcomp
 	$build_aux/config.guess
 	$build_aux/config.sub
 	doc/INSTALL
 "

 # Additional gnulib-tool options to use.  Use "\newline" to break lines.
 gnulib_tool_option_extras=

 # Other locale categories that need message catalogs.
 EXTRA_LOCALE_CATEGORIES=

 # Additional xgettext options to use.  Use "\\\newline" to break lines.
 XGETTEXT_OPTIONS='\\\
  --flag=_:1:pass-c-format\\\
  --flag=N_:1:pass-c-format\\\
  --flag=error:3:c-format --flag=error_at_line:5:c-format\\\
 '

 # Package bug report address for gettext files
 MSGID_BUGS_ADDRESS=bug-$package@gnu.org

 # Files we don't want to import.
 excluded_files=

 # File that should exist in the top directory of a checked out hierarchy,
 # but not in a distribution tarball.
 checkout_only_file=README-hacking

 # Whether to use copies instead of symlinks.
 copy=false

 # Set this to '.cvsignore .gitignore' in bootstrap.conf if you want
 # those files to be generated in directories like lib/, m4/, and po/.
 # Or set it to 'auto' to make this script select which to use based
 # on which version control system (if any) is used in the source directory.
 vc_ignore=auto

 # Override the default configuration, if necessary.
 # Make sure that bootstrap.conf is sourced from the current directory
 # if we were invoked as "sh bootstrap".
 case "$0" in
   */*) test -r "$0.conf" && . "$0.conf" ;;
   *) test -r "$0.conf" && . ./"$0.conf" ;;
 esac


 if test "$vc_ignore" = auto; then
   vc_ignore=
   test -d .git && vc_ignore=.gitignore
   test -d CVS && vc_ignore="$vc_ignore .cvsignore"
 fi

 # Translate configuration into internal form.

 # Parse options.

 for option
 do
   case $option in
   --help)
     usage
     exit;;
   --gnulib-srcdir=*)
     GNULIB_SRCDIR=`expr "X$option" : 'X--gnulib-srcdir=\(.*\)'`;;
   --skip-po)
     SKIP_PO=t;;
   --force)
     checkout_only_file=;;
   --copy)
     copy=true;;
   *)
     echo >&2 "$0: $option: unknown option"
     exit 1;;
   esac
 done

 if test -n "$checkout_only_file" && test ! -r "$checkout_only_file"; then
   echo "$0: Bootstrapping from a non-checked-out distribution is risky." >&2
   exit 1
 fi

 # If $STR is not already on a line by itself in $FILE, insert it,
 # sorting the new contents of the file and replacing $FILE with the result.
 insert_sorted_if_absent() {
   file=$1
   str=$2
   test -f $file || touch $file
   echo "$str" | sort -u - $file | cmp -s - $file \
     || echo "$str" | sort -u - $file -o $file \
     || exit 1
 }

 # Die if there is no AC_CONFIG_AUX_DIR($build_aux) line in configure.ac.
 found_aux_dir=no
 grep '^[	 ]*AC_CONFIG_AUX_DIR(\['"$build_aux"'\])' configure.ac \
     >/dev/null && found_aux_dir=yes
 grep '^[	 ]*AC_CONFIG_AUX_DIR('"$build_aux"')' configure.ac \
     >/dev/null && found_aux_dir=yes
 if test $found_aux_dir = no; then
   echo "$0: expected line not found in configure.ac. Add the following:" >&2
   echo "  AC_CONFIG_AUX_DIR([$build_aux])" >&2
   exit 1
 fi

 # If $build_aux doesn't exist, create it now, otherwise some bits
 # below will malfunction.  If creating it, also mark it as ignored.
 if test ! -d $build_aux; then
   mkdir $build_aux
   for dot_ig in x $vc_ignore; do
     test $dot_ig = x && continue
     insert_sorted_if_absent $dot_ig $build_aux
   done
 fi

 echo "$0: Bootstrapping from checked-out $package sources..."

 # See if we can use gnulib's git-merge-changelog merge driver.
 if test -d .git && (git --version) >/dev/null 2>/dev/null ; then
   if git config merge.merge-changelog.driver >/dev/null ; then
     :
   elif (git-merge-changelog --version) >/dev/null 2>/dev/null ; then
     echo "initializing git-merge-changelog driver"
     git config merge.merge-changelog.name 'GNU-style ChangeLog merge driver'
     git config merge.merge-changelog.driver 'git-merge-changelog %O %A %B'
   else
     echo "consider installing git-merge-changelog from gnulib"
   fi
 fi


 cleanup_gnulib() {
   status=$?
   rm -fr gnulib
   exit $status
 }

 git_modules_config () {
   test -f .gitmodules && git config --file .gitmodules "$@"
 }

 # Get gnulib files.

 case ${GNULIB_SRCDIR--} in
 -)
   if git_modules_config submodule.gnulib.url >/dev/null; then
     echo "$0: getting gnulib files..."
     git submodule init || exit $?
     git submodule update || exit $?

   elif [ ! -d gnulib ]; then
     echo "$0: getting gnulib files..."

     trap cleanup_gnulib 1 2 13 15

     git clone --depth 2 git://git.sv.gnu.org/gnulib ||
       cleanup_gnulib

     trap - 1 2 13 15
   fi
   GNULIB_SRCDIR=gnulib
   ;;
 *)
   # Redirect the gnulib submodule to the directory on the command line
   # if possible.
   if test -d "$GNULIB_SRCDIR"/.git && \
 	git_modules_config submodule.gnulib.url >/dev/null; then
     git submodule init
     GNULIB_SRCDIR=`cd $GNULIB_SRCDIR && pwd`
     git config --replace-all submodule.gnulib.url $GNULIB_SRCDIR
     echo "$0: getting gnulib files..."
     git submodule update || exit $?
     GNULIB_SRCDIR=gnulib
   fi
   ;;
 esac

 gnulib_tool=$GNULIB_SRCDIR/gnulib-tool
 <$gnulib_tool || exit

 # Get translations.

 download_po_files() {
   subdir=$1
   domain=$2
   echo "$0: getting translations into $subdir for $domain..."
   cmd=`printf "$po_download_command_format" "$domain" "$subdir"`
   eval "$cmd"
 }

 # Download .po files to $po_dir/.reference and copy only the new
 # or modified ones into $po_dir.  Also update $po_dir/LINGUAS.
 update_po_files() {
   # Directory containing primary .po files.
   # Overwrite them only when we're sure a .po file is new.
   po_dir=$1
   domain=$2

   # Download *.po files into this dir.
   # Usually contains *.s1 checksum files.
   ref_po_dir="$po_dir/.reference"

   test -d $ref_po_dir || mkdir $ref_po_dir || return
   download_po_files $ref_po_dir $domain \
     && ls "$ref_po_dir"/*.po 2>/dev/null |
       sed 's|.*/||; s|\.po$||' > "$po_dir/LINGUAS"

   langs=`cd $ref_po_dir && echo *.po|sed 's/\.po//g'`
   test "$langs" = '*' && langs=x
   for po in $langs; do
     case $po in x) continue;; esac
     new_po="$ref_po_dir/$po.po"
     cksum_file="$ref_po_dir/$po.s1"
     if ! test -f "$cksum_file" ||
 	! test -f "$po_dir/$po.po" ||
 	! sha1sum -c --status "$cksum_file" < "$new_po" > /dev/null; then
       echo "updated $po_dir/$po.po..."
       cp "$new_po" "$po_dir/$po.po" && sha1sum < "$new_po" > "$cksum_file"
     fi
   done
 }

 case $SKIP_PO in
 '')
   if test -d po; then
     update_po_files po $package || exit
   fi

   if test -d runtime-po; then
     update_po_files runtime-po $package-runtime || exit
   fi;;
 esac

 symlink_to_dir()
 {
   src=$1/$2
   dst=${3-$2}

   test -f "$src" && {

     # If the destination directory doesn't exist, create it.
     # This is required at least for "lib/uniwidth/cjk.h".
     dst_dir=`dirname "$dst"`
     if ! test -d "$dst_dir"; then
       mkdir -p "$dst_dir"

       # If we've just created a directory like lib/uniwidth,
       # tell version control system(s) it's ignorable.
       # FIXME: for now, this does only one level
       parent=`dirname "$dst_dir"`
       for dot_ig in x $vc_ignore; do
 	test $dot_ig = x && continue
 	ig=$parent/$dot_ig
 	insert_sorted_if_absent $ig `echo "$dst_dir"|sed 's,.*/,,'`
       done
     fi

     if $copy; then
       {
 	test ! -h "$dst" || {
 	  echo "$0: rm -f $dst" &&
 	  rm -f "$dst"
 	}
       } &&
       test -f "$dst" &&
       cmp -s "$src" "$dst" || {
 	echo "$0: cp -fp $src $dst" &&
 	cp -fp "$src" "$dst"
       }
     else
       test -h "$dst" &&
       src_ls=`ls -diL "$src" 2>/dev/null` && set $src_ls && src_i=$1 &&
       dst_ls=`ls -diL "$dst" 2>/dev/null` && set $dst_ls && dst_i=$1 &&
       test "$src_i" = "$dst_i" || {
 	dot_dots=
 	case $src in
 	/*) ;;
 	*)
 	  case /$dst/ in
 	  *//* | */../* | */./* | /*/*/*/*/*/)
 	     echo >&2 "$0: invalid symlink calculation: $src -> $dst"
 	     exit 1;;
 	  /*/*/*/*/)	dot_dots=../../../;;
 	  /*/*/*/)	dot_dots=../../;;
 	  /*/*/)	dot_dots=../;;
 	  esac;;
 	esac

 	echo "$0: ln -fs $dot_dots$src $dst" &&
 	ln -fs "$dot_dots$src" "$dst"
       }
     fi
   }
 }

 cp_mark_as_generated()
 {
   cp_src=$1
   cp_dst=$2

   if cmp -s "$cp_src" "$GNULIB_SRCDIR/$cp_dst"; then
     symlink_to_dir "$GNULIB_SRCDIR" "$cp_dst"
   elif cmp -s "$cp_src" "$local_gl_dir/$cp_dst"; then
     symlink_to_dir $local_gl_dir "$cp_dst"
   else
     case $cp_dst in
       *.[ch])             c1='/* '; c2=' */';;
       *.texi)             c1='@c '; c2=     ;;
       *.m4|*/Make*|Make*) c1='# ' ; c2=     ;;
       *)                  c1=     ; c2=     ;;
     esac

     # If the destination directory doesn't exist, create it.
     # This is required at least for "lib/uniwidth/cjk.h".
     dst_dir=`dirname "$cp_dst"`
     test -d "$dst_dir" || mkdir -p "$dst_dir"

     if test -z "$c1"; then
       cmp -s "$cp_src" "$cp_dst" || {
 	# Copy the file first to get proper permissions if it
 	# doesn't already exist.  Then overwrite the copy.
 	echo "$0: cp -f $cp_src $cp_dst" &&
 	rm -f "$cp_dst" &&
 	cp "$cp_src" "$cp_dst-t" &&
 	sed "s!$bt_regex/!!g" "$cp_src" > "$cp_dst-t" &&
 	mv -f "$cp_dst-t" "$cp_dst"
       }
     else
       # Copy the file first to get proper permissions if it
       # doesn't already exist.  Then overwrite the copy.
       cp "$cp_src" "$cp_dst-t" &&
       (
 	echo "$c1-*- buffer-read-only: t -*- vi: set ro:$c2" &&
 	echo "${c1}DO NOT EDIT! GENERATED AUTOMATICALLY!$c2" &&
 	sed "s!$bt_regex/!!g" "$cp_src"
       ) > $cp_dst-t &&
       if cmp -s "$cp_dst-t" "$cp_dst"; then
 	rm -f "$cp_dst-t"
       else
 	echo "$0: cp $cp_src $cp_dst # with edits" &&
 	mv -f "$cp_dst-t" "$cp_dst"
       fi
     fi
   fi
 }

 version_controlled_file() {
   dir=$1
   file=$2
   found=no
   if test -d CVS; then
     grep -F "/$file/" $dir/CVS/Entries 2>/dev/null |
 	     grep '^/[^/]*/[0-9]' > /dev/null && found=yes
   elif test -d .git; then
     git rm -n "$dir/$file" > /dev/null 2>&1 && found=yes
   elif test -d .svn; then
     svn log -r HEAD "$dir/$file" > /dev/null 2>&1 && found=yes
   else
     echo "$0: no version control for $dir/$file?" >&2
   fi
   test $found = yes
 }

 slurp() {
   for dir in . `(cd $1 && find * -type d -print)`; do
     copied=
     sep=
     for file in `ls -a $1/$dir`; do
       case $file in
       .|..) continue;;
       .*) continue;; # FIXME: should all file names starting with "." be ignored?
       esac
       test -d $1/$dir/$file && continue
       for excluded_file in $excluded_files; do
 	test "$dir/$file" = "$excluded_file" && continue 2
       done
       if test $file = Makefile.am; then
         copied=$copied${sep}$gnulib_mk; sep=$nl
 	remove_intl='/^[^#].*\/intl/s/^/#/;'"s!$bt_regex/!!g"
         sed "$remove_intl" $1/$dir/$file | cmp -s - $dir/$gnulib_mk || {
 	  echo "$0: Copying $1/$dir/$file to $dir/$gnulib_mk ..." &&
 	  rm -f $dir/$gnulib_mk &&
 	  sed "$remove_intl" $1/$dir/$file >$dir/$gnulib_mk
 	}
       elif { test "${2+set}" = set && test -r $2/$dir/$file; } ||
 	   version_controlled_file $dir $file; then
 	echo "$0: $dir/$file overrides $1/$dir/$file"
       else
 	copied=$copied$sep$file; sep=$nl
 	if test $file = gettext.m4; then
 	  echo "$0: patching m4/gettext.m4 to remove need for intl/* ..."
 	  rm -f $dir/$file
 	  sed '
 	    /^AC_DEFUN(\[AM_INTL_SUBDIR],/,/^]/c\
 	      AC_DEFUN([AM_INTL_SUBDIR], [
 	    /^AC_DEFUN(\[gt_INTL_SUBDIR_CORE],/,/^]/c\
 	      AC_DEFUN([gt_INTL_SUBDIR_CORE], [])
 	    $a\
 	      AC_DEFUN([gl_LOCK_EARLY], [])
 	  ' $1/$dir/$file >$dir/$file
 	else
 	  cp_mark_as_generated $1/$dir/$file $dir/$file
 	fi
       fi || exit
     done

     for dot_ig in x $vc_ignore; do
       test $dot_ig = x && continue
       ig=$dir/$dot_ig
       if test -n "$copied"; then
 	insert_sorted_if_absent $ig "$copied"
 	# If an ignored file name ends with .in.h, then also add
 	# the name with just ".h".  Many gnulib headers are generated,
 	# e.g., stdint.in.h -> stdint.h, dirent.in.h ->..., etc.
 	# Likewise for .gperf -> .h, .y -> .c, and .sin -> .sed
 	f=`echo "$copied"|sed 's/\.in\.h$/.h/;s/\.sin$/.sed/;s/\.y$/.c/;s/\.gperf$/.h/'`
 	insert_sorted_if_absent $ig "$f"

 	# For files like sys_stat.in.h and sys_time.in.h, record as
 	# ignorable the directory we might eventually create: sys/.
 	f=`echo "$copied"|sed 's/sys_.*\.in\.h$/sys/'`
 	insert_sorted_if_absent $ig "$f"
       fi
     done
   done
 }


 # Create boot temporary directories to import from gnulib and gettext.
 rm -fr $bt $bt2 &&
 mkdir $bt $bt2 || exit

 # Import from gnulib.

 gnulib_tool_options="\
  --import\
  --no-changelog\
  --aux-dir $bt/$build_aux\
  --doc-base $bt/$doc_base\
  --lib $gnulib_name\
  --m4-base $bt/$m4_base/\
  --source-base $bt/$source_base/\
  --tests-base $bt/$tests_base\
  --local-dir $local_gl_dir\
  $gnulib_tool_option_extras\
 "
 echo "$0: $gnulib_tool $gnulib_tool_options --import ..."
 $gnulib_tool $gnulib_tool_options --import $gnulib_modules &&
 slurp $bt || exit

 for file in $gnulib_files; do
   symlink_to_dir "$GNULIB_SRCDIR" $file || exit
 done


 # Import from gettext.
 with_gettext=yes
 grep '^[	 ]*AM_GNU_GETTEXT_VERSION(' configure.ac >/dev/null || \
     with_gettext=no

 if test $with_gettext = yes; then
   echo "$0: (cd $bt2; autopoint) ..."
   cp configure.ac $bt2 &&
   (cd $bt2 && autopoint && rm configure.ac) &&
   slurp $bt2 $bt || exit
 fi
 rm -fr $bt $bt2 || exit

 # Remove any dangling symlink matching "*.m4" or "*.[ch]" in some
 # gnulib-populated directories.  Such .m4 files would cause aclocal to fail.
 # The following requires GNU find 4.2.3 or newer.  Considering the usual
 # portability constraints of this script, that may seem a very demanding
 # requirement, but it should be ok.  Ignore any failure, which is fine,
 # since this is only a convenience to help developers avoid the relatively
 # unusual case in which a symlinked-to .m4 file is git-removed from gnulib
 # between successive runs of this script.
 find "$m4_base" "$source_base" \
   -depth \( -name '*.m4' -o -name '*.[ch]' \) \
   -type l -xtype l -delete > /dev/null 2>&1

 # Reconfigure, getting other files.

 for command in \
   libtool \
   'aclocal --force -I m4' \
   'autoconf --force' \
   'autoheader --force' \
   'automake --add-missing --copy --force-missing';
 do
   if test "$command" = libtool; then
     grep '^[	 ]*AM_PROG_LIBTOOL\>' configure.ac >/dev/null ||
       continue
     command='libtoolize -c -f'
   fi
   echo "$0: $command ..."
   $command || exit
 done


 # Get some extra files from gnulib, overriding existing files.
 for file in $gnulib_extra_files; do
   case $file in
   */INSTALL) dst=INSTALL;;
   build-aux/*) dst=$build_aux/`expr "$file" : 'build-aux/\(.*\)'`;;
   *) dst=$file;;
   esac
   symlink_to_dir "$GNULIB_SRCDIR" $file $dst || exit
 done

 if test $with_gettext = yes; then
   # Create gettext configuration.
   echo "$0: Creating po/Makevars from po/Makevars.template ..."
   rm -f po/Makevars
   sed '
     /^EXTRA_LOCALE_CATEGORIES *=/s/=.*/= '"$EXTRA_LOCALE_CATEGORIES"'/
     /^MSGID_BUGS_ADDRESS *=/s/=.*/= '"$MSGID_BUGS_ADDRESS"'/
     /^XGETTEXT_OPTIONS *=/{
       s/$/ \\/
       a\
 	  '"$XGETTEXT_OPTIONS"' $${end_of_xgettext_options+}
     }
   ' po/Makevars.template >po/Makevars

   if test -d runtime-po; then
     # Similarly for runtime-po/Makevars, but not quite the same.
     rm -f runtime-po/Makevars
     sed '
       /^DOMAIN *=.*/s/=.*/= '"$package"'-runtime/
       /^subdir *=.*/s/=.*/= runtime-po/
       /^MSGID_BUGS_ADDRESS *=/s/=.*/= bug-'"$package"'@gnu.org/
       /^XGETTEXT_OPTIONS *=/{
 	s/$/ \\/
 	a\
 	    '"$XGETTEXT_OPTIONS_RUNTIME"' $${end_of_xgettext_options+}
       }
     ' <po/Makevars.template >runtime-po/Makevars

     # Copy identical files from po to runtime-po.
     (cd po && cp -p Makefile.in.in *-quot *.header *.sed *.sin ../runtime-po)
   fi
 fi

 echo "$0: done.  Now you can run './configure'."
	#! /bin/sh

	# Bootstrap this package from checked-out sources.

	# Copyright (C) 2003-2008 Free Software Foundation, Inc.

	# 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/>.

	# Written by Paul Eggert.

	nl='
	'

	# Ensure file names are sorted consistently across platforms.
	LC_ALL=C
	export LC_ALL

	local_gl_dir=gl

	# Temporary directory names.
	bt='._bootmp'
	bt_regex=`echo "$bt"\| sed 's/\./[.]/g'`
	bt2=${bt}2

	usage() {
	echo >&2 "\
	Usage: $0 [OPTION]...
	Bootstrap this package from the checked-out sources.

	Options:
	--gnulib-srcdir=DIRNAME Specify the local directory where gnulib
	sources reside. Use this if you already
	have gnulib sources on your machine, and
	do not want to waste your bandwidth downloading
	them again.
	--copy Copy files instead of creating symbolic links.
	--force Attempt to bootstrap even if the sources seem
	not to have been checked out.
	--skip-po Do not download po files.

	If the file $0.conf exists in the same directory as this script, its
	contents are read as shell variables to configure the bootstrap.

	Running without arguments will suffice in most cases.
	"
	}

	# Configuration.

	# Name of the Makefile.am
	gnulib_mk=gnulib.mk

	# List of gnulib modules needed.
	gnulib_modules=

	# Any gnulib files needed that are not in modules.
	gnulib_files=

	# The command to download all .po files for a specified domain into
	# a specified directory. Fill in the first %s is the domain name, and
	# the second with the destination directory. Use rsync's -L and -r
	# options because the latest/%s directory and the .po files within are
	# all symlinks.
	po_download_command_format=\
	"rsync -Lrtvz 'translationproject.org::tp/latest/%s/' '%s'"

	extract_package_name='
	/^AC_INIT(/{
	/.,.,., /{
	s///
	s/[][]//g
	s/)$//
	p
	q
	}
	s/AC_INIT(\[*//
	s/],.//
	s/^GNU //
	y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/
	s/[^A-Za-z0-9_]/-/g
	p
	}
	'
	package=`sed -n "$extract_package_name" configure.ac` \|\| exit
	gnulib_name=lib$package

	build_aux=build-aux
	source_base=lib
	m4_base=m4
	doc_base=doc
	tests_base=tests

	# Extra files from gnulib, which override files from other sources.
	gnulib_extra_files="
	$build_aux/install-sh
	$build_aux/missing
	$build_aux/mdate-sh
	$build_aux/texinfo.tex
	$build_aux/depcomp
	$build_aux/config.guess
	$build_aux/config.sub
	doc/INSTALL
	"

	# Additional gnulib-tool options to use. Use "\newline" to break lines.
	gnulib_tool_option_extras=

	# Other locale categories that need message catalogs.
	EXTRA_LOCALE_CATEGORIES=

	# Additional xgettext options to use. Use "\\\newline" to break lines.
	XGETTEXT_OPTIONS='\\\
	--flag=_:1:pass-c-format\\\
	--flag=N_:1:pass-c-format\\\
	--flag=error:3:c-format --flag=error_at_line:5:c-format\\\
	'

	# Package bug report address for gettext files
	MSGID_BUGS_ADDRESS=bug-$package@gnu.org

	# Files we don't want to import.
	excluded_files=

	# File that should exist in the top directory of a checked out hierarchy,
	# but not in a distribution tarball.
	checkout_only_file=README-hacking

	# Whether to use copies instead of symlinks.
	copy=false

	# Set this to '.cvsignore .gitignore' in bootstrap.conf if you want
	# those files to be generated in directories like lib/, m4/, and po/.
	# Or set it to 'auto' to make this script select which to use based
	# on which version control system (if any) is used in the source directory.
	vc_ignore=auto

	# Override the default configuration, if necessary.
	# Make sure that bootstrap.conf is sourced from the current directory
	# if we were invoked as "sh bootstrap".
	case "$0" in
	/) test -r "$0.conf" && . "$0.conf" ;;
	*) test -r "$0.conf" && . ./"$0.conf" ;;
	esac


	if test "$vc_ignore" = auto; then
	vc_ignore=
	test -d .git && vc_ignore=.gitignore
	test -d CVS && vc_ignore="$vc_ignore .cvsignore"
	fi

	# Translate configuration into internal form.

	# Parse options.

	for option
	do
	case $option in
	--help)
	usage
	exit;;
	--gnulib-srcdir=*)
	GNULIB_SRCDIR=`expr "X$option" : 'X--gnulib-srcdir=\(.*\)'`;;
	--skip-po)
	SKIP_PO=t;;
	--force)
	checkout_only_file=;;
	--copy)
	copy=true;;
	*)
	echo >&2 "$0: $option: unknown option"
	exit 1;;
	esac
	done

	if test -n "$checkout_only_file" && test ! -r "$checkout_only_file"; then
	echo "$0: Bootstrapping from a non-checked-out distribution is risky." >&2
	exit 1
	fi

	# If $STR is not already on a line by itself in $FILE, insert it,
	# sorting the new contents of the file and replacing $FILE with the result.
	insert_sorted_if_absent() {
	file=$1
	str=$2
	test -f $file \|\| touch $file
	echo "$str" \| sort -u - $file \| cmp -s - $file \
	\|\| echo "$str" \| sort -u - $file -o $file \
	\|\| exit 1
	}

	# Die if there is no AC_CONFIG_AUX_DIR($build_aux) line in configure.ac.
	found_aux_dir=no
	grep '^[ ]*AC_CONFIG_AUX_DIR(\['"$build_aux"'\])' configure.ac \
	>/dev/null && found_aux_dir=yes
	grep '^[ ]*AC_CONFIG_AUX_DIR('"$build_aux"')' configure.ac \
	>/dev/null && found_aux_dir=yes
	if test $found_aux_dir = no; then
	echo "$0: expected line not found in configure.ac. Add the following:" >&2
	echo " AC_CONFIG_AUX_DIR([$build_aux])" >&2
	exit 1
	fi

	# If $build_aux doesn't exist, create it now, otherwise some bits
	# below will malfunction. If creating it, also mark it as ignored.
	if test ! -d $build_aux; then
	mkdir $build_aux
	for dot_ig in x $vc_ignore; do
	test $dot_ig = x && continue
	insert_sorted_if_absent $dot_ig $build_aux
	done
	fi

	echo "$0: Bootstrapping from checked-out $package sources..."

	# See if we can use gnulib's git-merge-changelog merge driver.
	if test -d .git && (git --version) >/dev/null 2>/dev/null ; then
	if git config merge.merge-changelog.driver >/dev/null ; then
	:
	elif (git-merge-changelog --version) >/dev/null 2>/dev/null ; then
	echo "initializing git-merge-changelog driver"
	git config merge.merge-changelog.name 'GNU-style ChangeLog merge driver'
	git config merge.merge-changelog.driver 'git-merge-changelog %O %A %B'
	else
	echo "consider installing git-merge-changelog from gnulib"
	fi
	fi


	cleanup_gnulib() {
	status=$?
	rm -fr gnulib
	exit $status
	}

	git_modules_config () {
	test -f .gitmodules && git config --file .gitmodules "$@"
	}

	# Get gnulib files.

	case ${GNULIB_SRCDIR--} in
	-)
	if git_modules_config submodule.gnulib.url >/dev/null; then
	echo "$0: getting gnulib files..."
	git submodule init \|\| exit $?
	git submodule update \|\| exit $?

	elif [ ! -d gnulib ]; then
	echo "$0: getting gnulib files..."

	trap cleanup_gnulib 1 2 13 15

	git clone --depth 2 git://git.sv.gnu.org/gnulib \|\|
	cleanup_gnulib

	trap - 1 2 13 15
	fi
	GNULIB_SRCDIR=gnulib
	;;
	*)
	# Redirect the gnulib submodule to the directory on the command line
	# if possible.
	if test -d "$GNULIB_SRCDIR"/.git && \
	git_modules_config submodule.gnulib.url >/dev/null; then
	git submodule init
	GNULIB_SRCDIR=`cd $GNULIB_SRCDIR && pwd`
	git config --replace-all submodule.gnulib.url $GNULIB_SRCDIR
	echo "$0: getting gnulib files..."
	git submodule update \|\| exit $?
	GNULIB_SRCDIR=gnulib
	fi
	;;
	esac

	gnulib_tool=$GNULIB_SRCDIR/gnulib-tool
	<$gnulib_tool \|\| exit

	# Get translations.

	download_po_files() {
	subdir=$1
	domain=$2
	echo "$0: getting translations into $subdir for $domain..."
	cmd=`printf "$po_download_command_format" "$domain" "$subdir"`
	eval "$cmd"
	}

	# Download .po files to $po_dir/.reference and copy only the new
	# or modified ones into $po_dir. Also update $po_dir/LINGUAS.
	update_po_files() {
	# Directory containing primary .po files.
	# Overwrite them only when we're sure a .po file is new.
	po_dir=$1
	domain=$2

	# Download *.po files into this dir.
	# Usually contains *.s1 checksum files.
	ref_po_dir="$po_dir/.reference"

	test -d $ref_po_dir \|\| mkdir $ref_po_dir \|\| return
	download_po_files $ref_po_dir $domain \
	&& ls "$ref_po_dir"/*.po 2>/dev/null \|
	sed 's\|.*/\|\|; s\|\.po$\|\|' > "$po_dir/LINGUAS"

	langs=`cd $ref_po_dir && echo *.po\|sed 's/\.po//g'`
	test "$langs" = '*' && langs=x
	for po in $langs; do
	case $po in x) continue;; esac
	new_po="$ref_po_dir/$po.po"
	cksum_file="$ref_po_dir/$po.s1"
	if ! test -f "$cksum_file" \|\|
	! test -f "$po_dir/$po.po" \|\|
	! sha1sum -c --status "$cksum_file" < "$new_po" > /dev/null; then
	echo "updated $po_dir/$po.po..."
	cp "$new_po" "$po_dir/$po.po" && sha1sum < "$new_po" > "$cksum_file"
	fi
	done
	}

	case $SKIP_PO in
	'')
	if test -d po; then
	update_po_files po $package \|\| exit
	fi

	if test -d runtime-po; then
	update_po_files runtime-po $package-runtime \|\| exit
	fi;;
	esac

	symlink_to_dir()
	{
	src=$1/$2
	dst=${3-$2}

	test -f "$src" && {

	# If the destination directory doesn't exist, create it.
	# This is required at least for "lib/uniwidth/cjk.h".
	dst_dir=`dirname "$dst"`
	if ! test -d "$dst_dir"; then
	mkdir -p "$dst_dir"

	# If we've just created a directory like lib/uniwidth,
	# tell version control system(s) it's ignorable.
	# FIXME: for now, this does only one level
	parent=`dirname "$dst_dir"`
	for dot_ig in x $vc_ignore; do
	test $dot_ig = x && continue
	ig=$parent/$dot_ig
	insert_sorted_if_absent $ig `echo "$dst_dir"\|sed 's,.*/,,'`
	done
	fi

	if $copy; then
	{
	test ! -h "$dst" \|\| {
	echo "$0: rm -f $dst" &&
	rm -f "$dst"
	}
	} &&
	test -f "$dst" &&
	cmp -s "$src" "$dst" \|\| {
	echo "$0: cp -fp $src $dst" &&
	cp -fp "$src" "$dst"
	}
	else
	test -h "$dst" &&
	src_ls=`ls -diL "$src" 2>/dev/null` && set $src_ls && src_i=$1 &&
	dst_ls=`ls -diL "$dst" 2>/dev/null` && set $dst_ls && dst_i=$1 &&
	test "$src_i" = "$dst_i" \|\| {
	dot_dots=
	case $src in
	/*) ;;
	*)
	case /$dst/ in
	// \| /../ \| /./ \| /////*/)
	echo >&2 "$0: invalid symlink calculation: $src -> $dst"
	exit 1;;
	/////) dot_dots=../../../;;
	///*/) dot_dots=../../;;
	///) dot_dots=../;;
	esac;;
	esac

	echo "$0: ln -fs $dot_dots$src $dst" &&
	ln -fs "$dot_dots$src" "$dst"
	}
	fi
	}
	}

	cp_mark_as_generated()
	{
	cp_src=$1
	cp_dst=$2

	if cmp -s "$cp_src" "$GNULIB_SRCDIR/$cp_dst"; then
	symlink_to_dir "$GNULIB_SRCDIR" "$cp_dst"
	elif cmp -s "$cp_src" "$local_gl_dir/$cp_dst"; then
	symlink_to_dir $local_gl_dir "$cp_dst"
	else
	case $cp_dst in
	.[ch]) c1='/ '; c2=' */';;
	*.texi) c1='@c '; c2= ;;
	.m4\|/Make\|Make) c1='# ' ; c2= ;;
	*) c1= ; c2= ;;
	esac

	# If the destination directory doesn't exist, create it.
	# This is required at least for "lib/uniwidth/cjk.h".
	dst_dir=`dirname "$cp_dst"`
	test -d "$dst_dir" \|\| mkdir -p "$dst_dir"

	if test -z "$c1"; then
	cmp -s "$cp_src" "$cp_dst" \|\| {
	# Copy the file first to get proper permissions if it
	# doesn't already exist. Then overwrite the copy.
	echo "$0: cp -f $cp_src $cp_dst" &&
	rm -f "$cp_dst" &&
	cp "$cp_src" "$cp_dst-t" &&
	sed "s!$bt_regex/!!g" "$cp_src" > "$cp_dst-t" &&
	mv -f "$cp_dst-t" "$cp_dst"
	}
	else
	# Copy the file first to get proper permissions if it
	# doesn't already exist. Then overwrite the copy.
	cp "$cp_src" "$cp_dst-t" &&
	(
	echo "$c1-- buffer-read-only: t -- vi: set ro:$c2" &&
	echo "${c1}DO NOT EDIT! GENERATED AUTOMATICALLY!$c2" &&
	sed "s!$bt_regex/!!g" "$cp_src"
	) > $cp_dst-t &&
	if cmp -s "$cp_dst-t" "$cp_dst"; then
	rm -f "$cp_dst-t"
	else
	echo "$0: cp $cp_src $cp_dst # with edits" &&
	mv -f "$cp_dst-t" "$cp_dst"
	fi
	fi
	fi
	}

	version_controlled_file() {
	dir=$1
	file=$2
	found=no
	if test -d CVS; then
	grep -F "/$file/" $dir/CVS/Entries 2>/dev/null \|
	grep '^/[^/]*/[0-9]' > /dev/null && found=yes
	elif test -d .git; then
	git rm -n "$dir/$file" > /dev/null 2>&1 && found=yes
	elif test -d .svn; then
	svn log -r HEAD "$dir/$file" > /dev/null 2>&1 && found=yes
	else
	echo "$0: no version control for $dir/$file?" >&2
	fi
	test $found = yes
	}

	slurp() {
	for dir in . `(cd $1 && find * -type d -print)`; do
	copied=
	sep=
	for file in `ls -a $1/$dir`; do
	case $file in
	.\|..) continue;;
	.*) continue;; # FIXME: should all file names starting with "." be ignored?
	esac
	test -d $1/$dir/$file && continue
	for excluded_file in $excluded_files; do
	test "$dir/$file" = "$excluded_file" && continue 2
	done
	if test $file = Makefile.am; then
	copied=$copied${sep}$gnulib_mk; sep=$nl
	remove_intl='/^[^#].*\/intl/s/^/#/;'"s!$bt_regex/!!g"
	sed "$remove_intl" $1/$dir/$file \| cmp -s - $dir/$gnulib_mk \|\| {
	echo "$0: Copying $1/$dir/$file to $dir/$gnulib_mk ..." &&
	rm -f $dir/$gnulib_mk &&
	sed "$remove_intl" $1/$dir/$file >$dir/$gnulib_mk
	}
	elif { test "${2+set}" = set && test -r $2/$dir/$file; } \|\|
	version_controlled_file $dir $file; then
	echo "$0: $dir/$file overrides $1/$dir/$file"
	else
	copied=$copied$sep$file; sep=$nl
	if test $file = gettext.m4; then
	echo "$0: patching m4/gettext.m4 to remove need for intl/* ..."
	rm -f $dir/$file
	sed '
	/^AC_DEFUN(\[AM_INTL_SUBDIR],/,/^]/c\
	AC_DEFUN([AM_INTL_SUBDIR], [
	/^AC_DEFUN(\[gt_INTL_SUBDIR_CORE],/,/^]/c\
	AC_DEFUN([gt_INTL_SUBDIR_CORE], [])
	$a\
	AC_DEFUN([gl_LOCK_EARLY], [])
	' $1/$dir/$file >$dir/$file
	else
	cp_mark_as_generated $1/$dir/$file $dir/$file
	fi
	fi \|\| exit
	done

	for dot_ig in x $vc_ignore; do
	test $dot_ig = x && continue
	ig=$dir/$dot_ig
	if test -n "$copied"; then
	insert_sorted_if_absent $ig "$copied"
	# If an ignored file name ends with .in.h, then also add
	# the name with just ".h". Many gnulib headers are generated,
	# e.g., stdint.in.h -> stdint.h, dirent.in.h ->..., etc.
	# Likewise for .gperf -> .h, .y -> .c, and .sin -> .sed
	f=`echo "$copied"\|sed 's/\.in\.h$/.h/;s/\.sin$/.sed/;s/\.y$/.c/;s/\.gperf$/.h/'`
	insert_sorted_if_absent $ig "$f"

	# For files like sys_stat.in.h and sys_time.in.h, record as
	# ignorable the directory we might eventually create: sys/.
	f=`echo "$copied"\|sed 's/sys_.*\.in\.h$/sys/'`
	insert_sorted_if_absent $ig "$f"
	fi
	done
	done
	}


	# Create boot temporary directories to import from gnulib and gettext.
	rm -fr $bt $bt2 &&
	mkdir $bt $bt2 \|\| exit

	# Import from gnulib.

	gnulib_tool_options="\
	--import\
	--no-changelog\
	--aux-dir $bt/$build_aux\
	--doc-base $bt/$doc_base\
	--lib $gnulib_name\
	--m4-base $bt/$m4_base/\
	--source-base $bt/$source_base/\
	--tests-base $bt/$tests_base\
	--local-dir $local_gl_dir\
	$gnulib_tool_option_extras\
	"
	echo "$0: $gnulib_tool $gnulib_tool_options --import ..."
	$gnulib_tool $gnulib_tool_options --import $gnulib_modules &&
	slurp $bt \|\| exit

	for file in $gnulib_files; do
	symlink_to_dir "$GNULIB_SRCDIR" $file \|\| exit
	done


	# Import from gettext.
	with_gettext=yes
	grep '^[ ]*AM_GNU_GETTEXT_VERSION(' configure.ac >/dev/null \|\| \
	with_gettext=no

	if test $with_gettext = yes; then
	echo "$0: (cd $bt2; autopoint) ..."
	cp configure.ac $bt2 &&
	(cd $bt2 && autopoint && rm configure.ac) &&
	slurp $bt2 $bt \|\| exit
	fi
	rm -fr $bt $bt2 \|\| exit

	# Remove any dangling symlink matching ".m4" or ".[ch]" in some
	# gnulib-populated directories. Such .m4 files would cause aclocal to fail.
	# The following requires GNU find 4.2.3 or newer. Considering the usual
	# portability constraints of this script, that may seem a very demanding
	# requirement, but it should be ok. Ignore any failure, which is fine,
	# since this is only a convenience to help developers avoid the relatively
	# unusual case in which a symlinked-to .m4 file is git-removed from gnulib
	# between successive runs of this script.
	find "$m4_base" "$source_base" \
	-depth \( -name '.m4' -o -name '.[ch]' \) \
	-type l -xtype l -delete > /dev/null 2>&1

	# Reconfigure, getting other files.

	for command in \
	libtool \
	'aclocal --force -I m4' \
	'autoconf --force' \
	'autoheader --force' \
	'automake --add-missing --copy --force-missing';
	do
	if test "$command" = libtool; then
	grep '^[ ]*AM_PROG_LIBTOOL\>' configure.ac >/dev/null \|\|
	continue
	command='libtoolize -c -f'
	fi
	echo "$0: $command ..."
	$command \|\| exit
	done


	# Get some extra files from gnulib, overriding existing files.
	for file in $gnulib_extra_files; do
	case $file in
	*/INSTALL) dst=INSTALL;;
	build-aux/) dst=$build_aux/`expr "$file" : 'build-aux/\(.\)'`;;
	*) dst=$file;;
	esac
	symlink_to_dir "$GNULIB_SRCDIR" $file $dst \|\| exit
	done

	if test $with_gettext = yes; then
	# Create gettext configuration.
	echo "$0: Creating po/Makevars from po/Makevars.template ..."
	rm -f po/Makevars
	sed '
	/^EXTRA_LOCALE_CATEGORIES =/s/=./= '"$EXTRA_LOCALE_CATEGORIES"'/
	/^MSGID_BUGS_ADDRESS =/s/=./= '"$MSGID_BUGS_ADDRESS"'/
	/^XGETTEXT_OPTIONS *=/{
	s/$/ \\/
	a\
	'"$XGETTEXT_OPTIONS"' $${end_of_xgettext_options+}
	}
	' po/Makevars.template >po/Makevars

	if test -d runtime-po; then
	# Similarly for runtime-po/Makevars, but not quite the same.
	rm -f runtime-po/Makevars
	sed '
	/^DOMAIN =./s/=.*/= '"$package"'-runtime/
	/^subdir =./s/=.*/= runtime-po/
	/^MSGID_BUGS_ADDRESS =/s/=./= bug-'"$package"'@gnu.org/
	/^XGETTEXT_OPTIONS *=/{
	s/$/ \\/
	a\
	'"$XGETTEXT_OPTIONS_RUNTIME"' $${end_of_xgettext_options+}
	}
	' <po/Makevars.template >runtime-po/Makevars

	# Copy identical files from po to runtime-po.
	(cd po && cp -p Makefile.in.in -quot .header .sed .sin ../runtime-po)
	fi
	fi

	echo "$0: done. Now you can run './configure'."