bootstrap - m4 - Git at Google


            
            #! /bin/sh


            # bootstrap (GNU M4) version 2008-02-23

            
            # Written by Gary V. Vaughan  <gary@gnu.org>


            # Copyright (C) 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.


            # This file is part of GNU M4.

            
            #

            
            # GNU M4 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.

            
            #

            
            # GNU M4 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/>.


            # Usage: $progname [options]


            # -f      --force            bootstrap even when sources are not from git

            
            # -v      --version          print version information

            
            # -h,-?   --help             print short or long help message


            # You can also set the following variables to help $progname

            
            # locate the right tools:

            
            #   AUTORECONF, GNULIB_TOOL, M4, RM, SED


            # This script bootstraps a git or CVS checkout of GNU M4 by correctly

            
            # calling out to parts of the GNU Build Platform.  Currently this

            
            # requires GNU Autoconf 2.60, GNU Automake 1.10.1, and bleeding edge

            
            # git or CVS snapshots of GNU Gnulib.


            # Report bugs to <bug-m4@gnu.org>


            : ${AUTORECONF=autoreconf}

            
            : ${GNULIB_TOOL=gnulib-tool}

            
            : ${RM=rm -f}

            
            : ${SED=sed}


            # Ensure file names are sorted consistently across platforms.

            
            LC_ALL=C

            
            export LC_ALL


            config_macro_dir=m4


            dirname="s,/[^/]*$,,"

            
            basename="s,^.*/,,g"


            # Work around backward compatibility issue on IRIX 6.5. On IRIX 6.4+, sh

            
            # is ksh but when the shell is invoked as "sh" and the current value of

            
            # the _XPG environment variable is not equal to 1 (one), the special

            
            # positional parameter $0, within a function call, is the name of the

            
            # function.

            
            progpath="$0"


            # The name of this program:

            
            progname=`echo "$progpath" | $SED "$basename"`

            
            PROGRAM=bootstrap


            # Detect whether this is a version control system checkout or a tarball

            
            vcs_only_file=HACKING


            # func_echo arg...

            
            # Echo program name prefixed message.

            
            func_echo ()

            
            {

            
                echo $progname: ${1+"$@"}

            
            }


            # func_error arg...

            
            # Echo program name prefixed message to standard error.

            
            func_error ()

            
            {

            
                echo $progname: ${1+"$@"} >&2

            
            }


            # func_fatal_error arg...

            
            # Echo program name prefixed message to standard error, and exit.

            
            func_fatal_error ()

            
            {

            
                func_error ${1+"$@"}

            
                exit $EXIT_FAILURE

            
            }


            # func_verbose arg...

            
            # Echo program name prefixed message in verbose mode only.

            
            func_verbose ()

            
            {

            
                $opt_verbose && func_error ${1+"$@"}

            
            }


            # func_missing_arg argname

            
            # Echo program name prefixed message to standard error and set global

            
            # exit_cmd.

            
            func_missing_arg ()

            
            {

            
               func_error "missing argument for $1"

            
               exit_cmd=exit

            
            }


            # func_fatal_help arg...

            
            # Echo program name prefixed message to standard error, followed by

            
            # a help hint, and exit.

            
            func_fatal_help ()

            
            {

            
                func_error ${1+"$@"}

            
                func_fatal_error "Try \`$progname --help' for more information."

            
            }


            # func_missing_arg argname

            
            # Echo program name prefixed message to standard error and set global

            
            # exit_cmd.

            
            func_missing_arg ()

            
            {

            
               func_error "missing argument for $1"

            
               exit_cmd=exit

            
            }


            # func_usage

            
            # Echo short help message to standard output and exit.

            
            func_usage ()

            
            {

            
                $SED '/^# Usage:/,/# -h/ {

            
            	s/^# //; s/^# *$//;

            
            	s/\$progname/'$progname'/;

            
            	p;

            
                }; d' < "$progpath"

            
                echo

            
                echo "run \`$progname --help | more' for full usage"

            
                exit $EXIT_SUCCESS

            
            }


            # func_help

            
            # Echo long help message to standard output and exit.

            
            func_help ()

            
            {

            
                $SED '/^# Usage:/,/# Report bugs to/ {

            
            	s/^# //; s/^# *$//;

            
            	s/\$progname/'$progname'/;

            
            	p;

            
                 }; d' < "$progpath"

            
                exit $EXIT_SUCCESS

            
            }


            # func_version

            
            # Echo version message to standard output and exit.

            
            func_version ()

            
            {

            
                $SED '/^# '$PROGRAM' (GNU /,/# warranty; / {

            
            	s/^# //; s/^# *$//;

            
            	s/\((C)\)[ 0-9,-]*\( [1-9][0-9]*\)/\1\2/;

            
            	p;

            
                 }; d' < "$progpath"

            
                 exit $EXIT_SUCCESS

            
            }


            # func_update

            
            # Copy $1 to $2 if it is newer.

            
            func_update ()

            
            {

            
              if test -f "$2" && cmp -s "$1" "$2" ; then

            
                func_verbose "$2 is up-to-date"

            
              else

            
                func_echo "copying $1 -> $2"

            
                cp "$1" "$2"

            
              fi

            
            }


            # Parse options once, thoroughly.  This comes as soon as possible in

            
            # the script to make things like `bootstrap --version' happen quickly.

            
            {

            
              # sed scripts:

            
              my_sed_single_opt='1s/^\(..\).*$/\1/;q'

            
              my_sed_single_rest='1s/^..\(.*\)$/\1/;q'

            
              my_sed_long_opt='1s/^\(--[^=]*\)=.*/\1/;q'

            
              my_sed_long_arg='1s/^--[^=]*=//'


              # this just eases exit handling

            
              while test $# -gt 0; do

            
                opt="$1"

            
                shift

            
                case $opt in

            
                  # Separate optargs to short options:

            
                  -f|--force)	vcs_only_file=					;;

            
                  -\?|-h)		func_usage					;;

            
                  --help)		func_help					;;

            
                  --version)	func_version					;;

            
                  --)		break						;;

            
                  -*)		func_fatal_help "unrecognized option \`$opt'"	;;

            
                  *)		set -- "$opt" ${1+"$@"};	break		;;

            
                esac

            
              done


              # Bail if the options were screwed

            
              $exit_cmd $EXIT_FAILURE


              if test -n "$vcs_only_file" && test ! -r "$vcs_only_file"; then

            
                func_fatal_error \

            
                  "Bootstrapping from a non-version-control distribution is risky."

            
              fi

            
            }


            ## ---------------- ##

            
            ## Version control. ##

            
            ## ---------------- ##


            # gnulib-tool updates m4/.{git,cvs}ignore and lib/.{git,cvs}ignore, and

            
            # keeping generated files under version control does not make sense.

            
            # Since lib is entirely ignored, we only need to prepopulate the m4 ignore

            
            # files with generated files not tracked by gnulib-tool.

            
            if test -f $config_macro_dir/.gitignore ; then

            
              :

            
            else

            
              func_echo "creating initial $config_macro_dir/.cvsignore"

            
              cat > $config_macro_dir/.cvsignore <<\EOF

            
            # files created by gnulib, but that gnulib doesn't track

            
            *~

            
            .cvsignore

            
            .gitignore

            
            gnulib-comp.m4

            
            # gnulib-tool edits below here

            
            EOF

            
              func_echo "creating initial $config_macro_dir/.gitignore"

            
              cp $config_macro_dir/.cvsignore $config_macro_dir/.gitignore

            
            fi


            # 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

            
                func_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

            
                func_echo "consider installing git-merge-changelog from gnulib"

            
              fi

            
            fi


            ## ---------------------------- ##

            
            ## Find the gnulib module tree. ##

            
            ## ---------------------------- ##


            case $GNULIB_TOOL in

            
                /*  )  gnulibdir=$GNULIB_TOOL ;;		# absolute

            
                */* )  gnulibdir=`pwd`/$GNULIB_TOOL ;;	# relative

            
                *   )  gnulibdir=`which "$GNULIB_TOOL"` ;;	# PATH search

            
            esac


            # Follow symlinks

            
            while test -h "$gnulibdir"; do


                # Resolve symbolic link.

            
                sedexpr1='s, -> ,#%%#,'

            
                sedexpr2='s,^.*#%%#\(.*\)$,\1,p'

            
                linkval=`ls -l "$gnulibdir" | $SED "$sedexpr1" | $SED -n "$sedexpr2"`

            
                test -n "$linkval" || break


                case "$linkval" in

            
            	/* ) gnulibdir="$linkval" ;;

            
            	* )  gnulibdir=`echo "$gnulibdir" | sed -e 's,/[^/]*$,,'`/"$linkval" ;;

            
                esac


            done


            gnulibdir=`echo "$gnulibdir" | $SED "$dirname"`


            ## ---------------------- ##

            
            ## Import Gnulib modules. ##

            
            ## ---------------------- ##


            func_echo "running: $GNULIB_TOOL --update"

            
            $GNULIB_TOOL --update || func_fatal_error "gnulib-tool failed"


            ## ----------- ##

            
            ## Autoreconf. ##

            
            ## ----------- ##


            func_echo "running: $AUTORECONF --force --verbose --install"

            
            $AUTORECONF --force --verbose --install || func_fatal_error "autoreconf failed"


            ## ---------------------------------------- ##

            
            ## Gnulib is more up-to-date than automake. ##

            
            ## ---------------------------------------- ##


            func_update "$gnulibdir"/build-aux/config.guess build-aux/config.guess

            
            func_update "$gnulibdir"/build-aux/config.sub build-aux/config.sub

            
            func_update "$gnulibdir"/build-aux/depcomp build-aux/depcomp

            
            func_update "$gnulibdir"/build-aux/install-sh build-aux/install-sh

            
            func_update "$gnulibdir"/build-aux/mdate-sh build-aux/mdate-sh

            
            func_update "$gnulibdir"/build-aux/missing build-aux/missing

            
            func_update "$gnulibdir"/build-aux/texinfo.tex build-aux/texinfo.tex

            
            func_update "$gnulibdir"/doc/COPYINGv3 COPYING

            
            func_update "$gnulibdir"/doc/INSTALL INSTALL


            exit 0


            # Local variables:

            
            # eval: (add-hook 'write-file-hooks 'time-stamp)

            
            # time-stamp-start: "# bootstrap (GNU M4) version "

            
            # time-stamp-format: "%:y-%02m-%02d"

            
            # time-stamp-end: "$"

            
            # End:
	#! /bin/sh

	# bootstrap (GNU M4) version 2008-02-23
	# Written by Gary V. Vaughan <gary@gnu.org>

	# Copyright (C) 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.

	# This file is part of GNU M4.
	#
	# GNU M4 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.
	#
	# GNU M4 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/>.

	# Usage: $progname [options]

	# -f --force bootstrap even when sources are not from git
	# -v --version print version information
	# -h,-? --help print short or long help message

	# You can also set the following variables to help $progname
	# locate the right tools:
	# AUTORECONF, GNULIB_TOOL, M4, RM, SED

	# This script bootstraps a git or CVS checkout of GNU M4 by correctly
	# calling out to parts of the GNU Build Platform. Currently this
	# requires GNU Autoconf 2.60, GNU Automake 1.10.1, and bleeding edge
	# git or CVS snapshots of GNU Gnulib.

	# Report bugs to <bug-m4@gnu.org>

	: ${AUTORECONF=autoreconf}
	: ${GNULIB_TOOL=gnulib-tool}
	: ${RM=rm -f}
	: ${SED=sed}

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

	config_macro_dir=m4

	dirname="s,/[^/]*$,,"
	basename="s,^.*/,,g"

	# Work around backward compatibility issue on IRIX 6.5. On IRIX 6.4+, sh
	# is ksh but when the shell is invoked as "sh" and the current value of
	# the _XPG environment variable is not equal to 1 (one), the special
	# positional parameter $0, within a function call, is the name of the
	# function.
	progpath="$0"

	# The name of this program:
	progname=`echo "$progpath" \| $SED "$basename"`
	PROGRAM=bootstrap

	# Detect whether this is a version control system checkout or a tarball
	vcs_only_file=HACKING

	# func_echo arg...
	# Echo program name prefixed message.
	func_echo ()
	{
	echo $progname: ${1+"$@"}
	}


	# func_error arg...
	# Echo program name prefixed message to standard error.
	func_error ()
	{
	echo $progname: ${1+"$@"} >&2
	}

	# func_fatal_error arg...
	# Echo program name prefixed message to standard error, and exit.
	func_fatal_error ()
	{
	func_error ${1+"$@"}
	exit $EXIT_FAILURE
	}

	# func_verbose arg...
	# Echo program name prefixed message in verbose mode only.
	func_verbose ()
	{
	$opt_verbose && func_error ${1+"$@"}
	}

	# func_missing_arg argname
	# Echo program name prefixed message to standard error and set global
	# exit_cmd.
	func_missing_arg ()
	{
	func_error "missing argument for $1"
	exit_cmd=exit
	}

	# func_fatal_help arg...
	# Echo program name prefixed message to standard error, followed by
	# a help hint, and exit.
	func_fatal_help ()
	{
	func_error ${1+"$@"}
	func_fatal_error "Try \`$progname --help' for more information."
	}

	# func_missing_arg argname
	# Echo program name prefixed message to standard error and set global
	# exit_cmd.
	func_missing_arg ()
	{
	func_error "missing argument for $1"
	exit_cmd=exit
	}

	# func_usage
	# Echo short help message to standard output and exit.
	func_usage ()
	{
	$SED '/^# Usage:/,/# -h/ {
	s/^# //; s/^# *$//;
	s/\$progname/'$progname'/;
	p;
	}; d' < "$progpath"
	echo
	echo "run \`$progname --help \| more' for full usage"
	exit $EXIT_SUCCESS
	}

	# func_help
	# Echo long help message to standard output and exit.
	func_help ()
	{
	$SED '/^# Usage:/,/# Report bugs to/ {
	s/^# //; s/^# *$//;
	s/\$progname/'$progname'/;
	p;
	}; d' < "$progpath"
	exit $EXIT_SUCCESS
	}

	# func_version
	# Echo version message to standard output and exit.
	func_version ()
	{
	$SED '/^# '$PROGRAM' (GNU /,/# warranty; / {
	s/^# //; s/^# *$//;
	s/\((C)\)[ 0-9,-]\( [1-9][0-9]\)/\1\2/;
	p;
	}; d' < "$progpath"
	exit $EXIT_SUCCESS
	}

	# func_update
	# Copy $1 to $2 if it is newer.
	func_update ()
	{
	if test -f "$2" && cmp -s "$1" "$2" ; then
	func_verbose "$2 is up-to-date"
	else
	func_echo "copying $1 -> $2"
	cp "$1" "$2"
	fi
	}

	# Parse options once, thoroughly. This comes as soon as possible in
	# the script to make things like `bootstrap --version' happen quickly.
	{
	# sed scripts:
	my_sed_single_opt='1s/^\(..\).*$/\1/;q'
	my_sed_single_rest='1s/^..\(.*\)$/\1/;q'
	my_sed_long_opt='1s/^\(--[^=]\)=./\1/;q'
	my_sed_long_arg='1s/^--[^=]*=//'

	# this just eases exit handling
	while test $# -gt 0; do
	opt="$1"
	shift
	case $opt in
	# Separate optargs to short options:
	-f\|--force) vcs_only_file= ;;
	-\?\|-h) func_usage ;;
	--help) func_help ;;
	--version) func_version ;;
	--) break ;;
	-*) func_fatal_help "unrecognized option \`$opt'" ;;
	*) set -- "$opt" ${1+"$@"}; break ;;
	esac
	done

	# Bail if the options were screwed
	$exit_cmd $EXIT_FAILURE

	if test -n "$vcs_only_file" && test ! -r "$vcs_only_file"; then
	func_fatal_error \
	"Bootstrapping from a non-version-control distribution is risky."
	fi
	}

	## ---------------- ##
	## Version control. ##
	## ---------------- ##

	# gnulib-tool updates m4/.{git,cvs}ignore and lib/.{git,cvs}ignore, and
	# keeping generated files under version control does not make sense.
	# Since lib is entirely ignored, we only need to prepopulate the m4 ignore
	# files with generated files not tracked by gnulib-tool.
	if test -f $config_macro_dir/.gitignore ; then
	:
	else
	func_echo "creating initial $config_macro_dir/.cvsignore"
	cat > $config_macro_dir/.cvsignore <<\EOF
	# files created by gnulib, but that gnulib doesn't track
	*~
	.cvsignore
	.gitignore
	gnulib-comp.m4
	# gnulib-tool edits below here
	EOF
	func_echo "creating initial $config_macro_dir/.gitignore"
	cp $config_macro_dir/.cvsignore $config_macro_dir/.gitignore
	fi

	# 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
	func_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
	func_echo "consider installing git-merge-changelog from gnulib"
	fi
	fi

	## ---------------------------- ##
	## Find the gnulib module tree. ##
	## ---------------------------- ##

	case $GNULIB_TOOL in
	/* ) gnulibdir=$GNULIB_TOOL ;; # absolute
	/ ) gnulibdir=`pwd`/$GNULIB_TOOL ;; # relative
	* ) gnulibdir=`which "$GNULIB_TOOL"` ;; # PATH search
	esac

	# Follow symlinks
	while test -h "$gnulibdir"; do

	# Resolve symbolic link.
	sedexpr1='s, -> ,#%%#,'
	sedexpr2='s,^.#%%#\(.\)$,\1,p'
	linkval=`ls -l "$gnulibdir" \| $SED "$sedexpr1" \| $SED -n "$sedexpr2"`
	test -n "$linkval" \|\| break

	case "$linkval" in
	/* ) gnulibdir="$linkval" ;;
	* ) gnulibdir=`echo "$gnulibdir" \| sed -e 's,/[^/]*$,,'`/"$linkval" ;;
	esac

	done

	gnulibdir=`echo "$gnulibdir" \| $SED "$dirname"`

	## ---------------------- ##
	## Import Gnulib modules. ##
	## ---------------------- ##

	func_echo "running: $GNULIB_TOOL --update"
	$GNULIB_TOOL --update \|\| func_fatal_error "gnulib-tool failed"

	## ----------- ##
	## Autoreconf. ##
	## ----------- ##

	func_echo "running: $AUTORECONF --force --verbose --install"
	$AUTORECONF --force --verbose --install \|\| func_fatal_error "autoreconf failed"

	## ---------------------------------------- ##
	## Gnulib is more up-to-date than automake. ##
	## ---------------------------------------- ##

	func_update "$gnulibdir"/build-aux/config.guess build-aux/config.guess
	func_update "$gnulibdir"/build-aux/config.sub build-aux/config.sub
	func_update "$gnulibdir"/build-aux/depcomp build-aux/depcomp
	func_update "$gnulibdir"/build-aux/install-sh build-aux/install-sh
	func_update "$gnulibdir"/build-aux/mdate-sh build-aux/mdate-sh
	func_update "$gnulibdir"/build-aux/missing build-aux/missing
	func_update "$gnulibdir"/build-aux/texinfo.tex build-aux/texinfo.tex
	func_update "$gnulibdir"/doc/COPYINGv3 COPYING
	func_update "$gnulibdir"/doc/INSTALL INSTALL

	exit 0

	# Local variables:
	# eval: (add-hook 'write-file-hooks 'time-stamp)
	# time-stamp-start: "# bootstrap (GNU M4) version "
	# time-stamp-format: "%:y-%02m-%02d"
	# time-stamp-end: "$"
	# End: