bootstrap

   1 #! /bin/sh
   2 # Print a version string.
   3 scriptversion=2014-12-08.12; # UTC
   4
   5 # Bootstrap this package from checked-out sources.
   6
   7 # Copyright (C) 2003-2015 Free Software Foundation, Inc.
   8
   9 # This program is free software: you can redistribute it and/or modify
  10 # it under the terms of the GNU General Public License as published by
  11 # the Free Software Foundation, either version 3 of the License, or
  12 # (at your option) any later version.
  13
  14 # This program is distributed in the hope that it will be useful,
  15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 # GNU General Public License for more details.
  18
  19 # You should have received a copy of the GNU General Public License
  20 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21
  22 # Originally written by Paul Eggert.  The canonical version of this
  23 # script is maintained as build-aux/bootstrap in gnulib, however, to
  24 # be useful to your project, you should place a copy of it under
  25 # version control in the top-level directory of your project.  The
  26 # intent is that all customization can be done with a bootstrap.conf
  27 # file also maintained in your version control; gnulib comes with a
  28 # template build-aux/bootstrap.conf to get you started.
  29
  30 # Please report bugs or propose patches to bug-gnulib@gnu.org.
  31
  32 nl='
  33 '
  34
  35 # Ensure file names are sorted consistently across platforms.
  36 LC_ALL=C
  37 export LC_ALL
  38
  39 # Ensure that CDPATH is not set.  Otherwise, the output from cd
  40 # would cause trouble in at least one use below.
  41 (unset CDPATH) >/dev/null 2>&1 && unset CDPATH
  42
  43 local_gl_dir=gl
  44
  45 # Honour $PERL, but work even if there is none
  46 PERL="${PERL-perl}"
  47
  48 me=$0
  49
  50 usage() {
  51   cat <<EOF
  52 Usage: $me [OPTION]...
  53 Bootstrap this package from the checked-out sources.
  54
  55 Options:
  56  --gnulib-srcdir=DIRNAME  specify the local directory where gnulib
  57                           sources reside.  Use this if you already
  58                           have gnulib sources on your machine, and
  59                           do not want to waste your bandwidth downloading
  60                           them again.  Defaults to \$GNULIB_SRCDIR
  61  --bootstrap-sync         if this bootstrap script is not identical to
  62                           the version in the local gnulib sources,
  63                           update this script, and then restart it with
  64                           /bin/sh or the shell \$CONFIG_SHELL
  65  --no-bootstrap-sync      do not check whether bootstrap is out of sync
  66  --copy                   copy files instead of creating symbolic links
  67  --force                  attempt to bootstrap even if the sources seem
  68                           not to have been checked out
  69  --no-git                 do not use git to update gnulib.  Requires that
  70                           --gnulib-srcdir point to a correct gnulib snapshot
  71  --skip-po                do not download po files
  72
  73 If the file $me.conf exists in the same directory as this script, its
  74 contents are read as shell variables to configure the bootstrap.
  75
  76 For build prerequisites, environment variables like \$AUTOCONF and \$AMTAR
  77 are honored.
  78
  79 Running without arguments will suffice in most cases.
  80 EOF
  81 }
  82
  83 # warnf_ FORMAT-STRING ARG1...
  84 warnf_ ()
  85 {
  86   warnf_format_=$1
  87   shift
  88   nl='
  89 '
  90   case $* in
  91     *$nl*) me_=$(printf "$me"|tr "$nl|" '??')
  92        printf "$warnf_format_" "$@" | sed "s|^|$me_: |" ;;
  93     *) printf "$me: $warnf_format_" "$@" ;;
  94   esac >&2
  95 }
  96
  97 # warn_ WORD1...
  98 warn_ ()
  99 {
 100   # If IFS does not start with ' ', set it and emit the warning in a subshell.
 101   case $IFS in
 102     ' '*) warnf_ '%s\n' "$*";;
 103     *)    (IFS=' '; warn_ "$@");;
 104   esac
 105 }
 106
 107 # die WORD1...
 108 die() { warn_ "$@"; exit 1; }
 109
 110 # Configuration.
 111
 112 # Name of the Makefile.am
 113 gnulib_mk=gnulib.mk
 114
 115 # List of gnulib modules needed.
 116 gnulib_modules=
 117
 118 # Any gnulib files needed that are not in modules.
 119 gnulib_files=
 120
 121 : ${AUTOPOINT=autopoint}
 122 : ${AUTORECONF=autoreconf}
 123
 124 # A function to be called right after gnulib-tool is run.
 125 # Override it via your own definition in bootstrap.conf.
 126 bootstrap_post_import_hook() { :; }
 127
 128 # A function to be called after everything else in this script.
 129 # Override it via your own definition in bootstrap.conf.
 130 bootstrap_epilogue() { :; }
 131
 132 # The command to download all .po files for a specified domain into
 133 # a specified directory.  Fill in the first %s is the domain name, and
 134 # the second with the destination directory.  Use rsync's -L and -r
 135 # options because the latest/%s directory and the .po files within are
 136 # all symlinks.
 137 po_download_command_format=\
 138 "rsync --delete --exclude '*.s1' -Lrtvz \
 139  'translationproject.org::tp/latest/%s/' '%s'"
 140
 141 # Fallback for downloading .po files (if rsync fails).
 142 po_download_command_format2=\
 143 "wget --mirror -nd -q -np -A.po -P '%s' \
 144  http://translationproject.org/latest/%s/"
 145
 146 # Prefer a non-empty tarname (4th argument of AC_INIT if given), else
 147 # fall back to the package name (1st argument with munging)
 148 extract_package_name='
 149   /^AC_INIT(\[*/{
 150      s///
 151      /^[^,]*,[^,]*,[^,]*,[ []*\([^][ ,)]\)/{
 152        s//\1/
 153        s/[],)].*//
 154        p
 155        q
 156      }
 157      s/[],)].*//
 158      s/^GNU //
 159      y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/
 160      s/[^abcdefghijklmnopqrstuvwxyz0123456789_]/-/g
 161      p
 162   }
 163 '
 164 package=$(sed -n "$extract_package_name" configure.ac) \
 165   || die 'cannot find package name in configure.ac'
 166 gnulib_name=lib$package
 167
 168 build_aux=build-aux
 169 source_base=lib
 170 m4_base=m4
 171 doc_base=doc
 172 tests_base=tests
 173 gnulib_extra_files=''
 174
 175 # Additional gnulib-tool options to use.  Use "\newline" to break lines.
 176 gnulib_tool_option_extras=
 177
 178 # Other locale categories that need message catalogs.
 179 EXTRA_LOCALE_CATEGORIES=
 180
 181 # Additional xgettext options to use.  Use "\\\newline" to break lines.
 182 XGETTEXT_OPTIONS='\\\
 183  --flag=_:1:pass-c-format\\\
 184  --flag=N_:1:pass-c-format\\\
 185  --flag=error:3:c-format --flag=error_at_line:5:c-format\\\
 186 '
 187
 188 # Package bug report address and copyright holder for gettext files
 189 COPYRIGHT_HOLDER='Free Software Foundation, Inc.'
 190 MSGID_BUGS_ADDRESS=bug-$package@gnu.org
 191
 192 # Files we don't want to import.
 193 excluded_files=
 194
 195 # File that should exist in the top directory of a checked out hierarchy,
 196 # but not in a distribution tarball.
 197 checkout_only_file=README-hacking
 198
 199 # Whether to use copies instead of symlinks.
 200 copy=false
 201
 202 # Set this to '.cvsignore .gitignore' in bootstrap.conf if you want
 203 # those files to be generated in directories like lib/, m4/, and po/.
 204 # Or set it to 'auto' to make this script select which to use based
 205 # on which version control system (if any) is used in the source directory.
 206 vc_ignore=auto
 207
 208 # Set this to true in bootstrap.conf to enable --bootstrap-sync by
 209 # default.
 210 bootstrap_sync=false
 211
 212 # Use git to update gnulib sources
 213 use_git=true
 214
 215 check_exists() {
 216   if test "$1" = "--verbose"; then
 217     ($2 --version </dev/null) >/dev/null 2>&1
 218     if test $? -ge 126; then
 219       # If not found, run with diagnostics as one may be
 220       # presented with env variables to set to find the right version
 221       ($2 --version </dev/null)
 222     fi
 223   else
 224     ($1 --version </dev/null) >/dev/null 2>&1
 225   fi
 226
 227   test $? -lt 126
 228 }
 229
 230 # find_tool ENVVAR NAMES...
 231 # -------------------------
 232 # Search for a required program.  Use the value of ENVVAR, if set,
 233 # otherwise find the first of the NAMES that can be run.
 234 # If found, set ENVVAR to the program name, die otherwise.
 235 #
 236 # FIXME: code duplication, see also gnu-web-doc-update.
 237 find_tool ()
 238 {
 239   find_tool_envvar=$1
 240   shift
 241   find_tool_names=$@
 242   eval "find_tool_res=\$$find_tool_envvar"
 243   if test x"$find_tool_res" = x; then
 244     for i; do
 245       if check_exists $i; then
 246         find_tool_res=$i
 247         break
 248       fi
 249     done
 250   fi
 251   if test x"$find_tool_res" = x; then
 252     warn_ "one of these is required: $find_tool_names;"
 253     die   "alternatively set $find_tool_envvar to a compatible tool"
 254   fi
 255   eval "$find_tool_envvar=\$find_tool_res"
 256   eval "export $find_tool_envvar"
 257 }
 258
 259 # Override the default configuration, if necessary.
 260 # Make sure that bootstrap.conf is sourced from the current directory
 261 # if we were invoked as "sh bootstrap".
 262 case "$0" in
 263   */*) test -r "$0.conf" && . "$0.conf" ;;
 264   *) test -r "$0.conf" && . ./"$0.conf" ;;
 265 esac
 266
 267 # Extra files from gnulib, which override files from other sources.
 268 test -z "${gnulib_extra_files}" && \
 269   gnulib_extra_files="
 270         build-aux/install-sh
 271         build-aux/mdate-sh
 272         build-aux/texinfo.tex
 273         build-aux/depcomp
 274         build-aux/config.guess
 275         build-aux/config.sub
 276         doc/INSTALL
 277 "
 278
 279 if test "$vc_ignore" = auto; then
 280   vc_ignore=
 281   test -d .git && vc_ignore=.gitignore
 282   test -d CVS && vc_ignore="$vc_ignore .cvsignore"
 283 fi
 284
 285 # Translate configuration into internal form.
 286
 287 # Parse options.
 288
 289 for option
 290 do
 291   case $option in
 292   --help)
 293     usage
 294     exit;;
 295   --gnulib-srcdir=*)
 296     GNULIB_SRCDIR=${option#--gnulib-srcdir=};;
 297   --skip-po)
 298     SKIP_PO=t;;
 299   --force)
 300     checkout_only_file=;;
 301   --copy)
 302     copy=true;;
 303   --bootstrap-sync)
 304     bootstrap_sync=true;;
 305   --no-bootstrap-sync)
 306     bootstrap_sync=false;;
 307   --no-git)
 308     use_git=false;;
 309   *)
 310     die "$option: unknown option";;
 311   esac
 312 done
 313
 314 $use_git || test -d "$GNULIB_SRCDIR" \
 315   || die "Error: --no-git requires --gnulib-srcdir"
 316
 317 if test -n "$checkout_only_file" && test ! -r "$checkout_only_file"; then
 318   die "Bootstrapping from a non-checked-out distribution is risky."
 319 fi
 320
 321 # Strip blank and comment lines to leave significant entries.
 322 gitignore_entries() {
 323   sed '/^#/d; /^$/d' "$@"
 324 }
 325
 326 # If $STR is not already on a line by itself in $FILE, insert it at the start.
 327 # Entries are inserted at the start of the ignore list to ensure existing
 328 # entries starting with ! are not overridden.  Such entries support
 329 # whitelisting exceptions after a more generic blacklist pattern.
 330 insert_if_absent() {
 331   file=$1
 332   str=$2
 333   test -f $file || touch $file
 334   test -r $file || die "Error: failed to read ignore file: $file"
 335   duplicate_entries=$(gitignore_entries $file | sort | uniq -d)
 336   if [ "$duplicate_entries" ] ; then
 337     die "Error: Duplicate entries in $file: " $duplicate_entries
 338   fi
 339   linesold=$(gitignore_entries $file | wc -l)
 340   linesnew=$( { echo "$str"; cat $file; } | gitignore_entries | sort -u | wc -l)
 341   if [ $linesold != $linesnew ] ; then
 342     { echo "$str" | cat - $file > $file.bak && mv $file.bak $file; } \
 343       || die "insert_if_absent $file $str: failed"
 344   fi
 345 }
 346
 347 # Adjust $PATTERN for $VC_IGNORE_FILE and insert it with
 348 # insert_if_absent.
 349 insert_vc_ignore() {
 350   vc_ignore_file="$1"
 351   pattern="$2"
 352   case $vc_ignore_file in
 353   *.gitignore)
 354     # A .gitignore entry that does not start with '/' applies
 355     # recursively to subdirectories, so prepend '/' to every
 356     # .gitignore entry.
 357     pattern=$(echo "$pattern" | sed s,^,/,);;
 358   esac
 359   insert_if_absent "$vc_ignore_file" "$pattern"
 360 }
 361
 362 # Die if there is no AC_CONFIG_AUX_DIR($build_aux) line in configure.ac.
 363 found_aux_dir=no
 364 grep '^[         ]*AC_CONFIG_AUX_DIR(\['"$build_aux"'\])' configure.ac \
 365     >/dev/null && found_aux_dir=yes
 366 grep '^[         ]*AC_CONFIG_AUX_DIR('"$build_aux"')' configure.ac \
 367     >/dev/null && found_aux_dir=yes
 368 test $found_aux_dir = yes \
 369   || die "configure.ac lacks 'AC_CONFIG_AUX_DIR([$build_aux])'; add it"
 370
 371 # If $build_aux doesn't exist, create it now, otherwise some bits
 372 # below will malfunction.  If creating it, also mark it as ignored.
 373 if test ! -d $build_aux; then
 374   mkdir $build_aux
 375   for dot_ig in x $vc_ignore; do
 376     test $dot_ig = x && continue
 377     insert_vc_ignore $dot_ig $build_aux
 378   done
 379 fi
 380
 381 # Note this deviates from the version comparison in automake
 382 # in that it treats 1.5 < 1.5.0, and treats 1.4.4a < 1.4-p3a
 383 # but this should suffice as we won't be specifying old
 384 # version formats or redundant trailing .0 in bootstrap.conf.
 385 # If we did want full compatibility then we should probably
 386 # use m4_version_compare from autoconf.
 387 sort_ver() { # sort -V is not generally available
 388   ver1="$1"
 389   ver2="$2"
 390
 391   # split on '.' and compare each component
 392   i=1
 393   while : ; do
 394     p1=$(echo "$ver1" | cut -d. -f$i)
 395     p2=$(echo "$ver2" | cut -d. -f$i)
 396     if [ ! "$p1" ]; then
 397       echo "$1 $2"
 398       break
 399     elif [ ! "$p2" ]; then
 400       echo "$2 $1"
 401       break
 402     elif [ ! "$p1" = "$p2" ]; then
 403       if [ "$p1" -gt "$p2" ] 2>/dev/null; then # numeric comparison
 404         echo "$2 $1"
 405       elif [ "$p2" -gt "$p1" ] 2>/dev/null; then # numeric comparison
 406         echo "$1 $2"
 407       else # numeric, then lexicographic comparison
 408         lp=$(printf "$p1\n$p2\n" | LANG=C sort -n | tail -n1)
 409         if [ "$lp" = "$p2" ]; then
 410           echo "$1 $2"
 411         else
 412           echo "$2 $1"
 413         fi
 414       fi
 415       break
 416     fi
 417     i=$(($i+1))
 418   done
 419 }
 420
 421 get_version() {
 422   app=$1
 423
 424   $app --version >/dev/null 2>&1 || { $app --version; return 1; }
 425
 426   $app --version 2>&1 |
 427   sed -n '# Move version to start of line.
 428           s/.*[v ]\([0-9]\)/\1/
 429
 430           # Skip lines that do not start with version.
 431           /^[0-9]/!d
 432
 433           # Remove characters after the version.
 434           s/[^.a-z0-9-].*//
 435
 436           # The first component must be digits only.
 437           s/^\([0-9]*\)[a-z-].*/\1/
 438
 439           #the following essentially does s/5.005/5.5/
 440           s/\.0*\([1-9]\)/.\1/g
 441           p
 442           q'
 443 }
 444
 445 check_versions() {
 446   ret=0
 447
 448   while read app req_ver; do
 449     # We only need libtoolize from the libtool package.
 450     if test "$app" = libtool; then
 451       app=libtoolize
 452     fi
 453     # Exempt git if --no-git is in effect.
 454     if test "$app" = git; then
 455       $use_git || continue
 456     fi
 457     # Honor $APP variables ($TAR, $AUTOCONF, etc.)
 458     appvar=$(echo $app | LC_ALL=C tr '[a-z]-' '[A-Z]_')
 459     test "$appvar" = TAR && appvar=AMTAR
 460     case $appvar in
 461         GZIP) ;; # Do not use $GZIP:  it contains gzip options.
 462         PERL::*) ;; # Keep perl modules as-is
 463         *) eval "app=\${$appvar-$app}" ;;
 464     esac
 465
 466     # Handle the still-experimental Automake-NG programs specially.
 467     # They remain named as the mainstream Automake programs ("automake",
 468     # and "aclocal") to avoid gratuitous incompatibilities with
 469     # pre-existing usages (by, say, autoreconf, or custom autogen.sh
 470     # scripts), but correctly identify themselves (as being part of
 471     # "GNU automake-ng") when asked their version.
 472     case $app in
 473       automake-ng|aclocal-ng)
 474         app=${app%-ng}
 475         ($app --version | grep '(GNU automake-ng)') >/dev/null 2>&1 || {
 476           warn_ "Error: '$app' not found or not from Automake-NG"
 477           ret=1
 478           continue
 479         } ;;
 480       # Another check is for perl modules.  These can be written as
 481       # e.g. perl::XML::XPath in case of XML::XPath module, etc.
 482       perl::*)
 483         # Extract module name
 484         app="${app#perl::}"
 485         if ! $PERL -m"$app" -e 'exit 0' >/dev/null 2>&1; then
 486           warn_ "Error: perl module '$app' not found"
 487           ret=1
 488         fi
 489         continue
 490         ;;
 491     esac
 492     if [ "$req_ver" = "-" ]; then
 493       # Merely require app to exist; not all prereq apps are well-behaved
 494       # so we have to rely on $? rather than get_version.
 495       if ! check_exists --verbose $app; then
 496         warn_ "Error: '$app' not found"
 497         ret=1
 498       fi
 499     else
 500       # Require app to produce a new enough version string.
 501       inst_ver=$(get_version $app)
 502       if [ ! "$inst_ver" ]; then
 503         warn_ "Error: '$app' not found"
 504         ret=1
 505       else
 506         latest_ver=$(sort_ver $req_ver $inst_ver | cut -d' ' -f2)
 507         if [ ! "$latest_ver" = "$inst_ver" ]; then
 508           warnf_ '%s\n'                                        \
 509               "Error: '$app' version == $inst_ver is too old"  \
 510               "       '$app' version >= $req_ver is required"
 511           ret=1
 512         fi
 513       fi
 514     fi
 515   done
 516
 517   return $ret
 518 }
 519
 520 print_versions() {
 521   echo "Program    Min_version"
 522   echo "----------------------"
 523   printf %s "$buildreq"
 524   echo "----------------------"
 525   # can't depend on column -t
 526 }
 527
 528 # Find sha1sum, named gsha1sum on MacPorts, shasum on Mac OS X 10.6.
 529 # Also find the compatible sha1 utility on the BSDs
 530 if test x"$SKIP_PO" = x; then
 531   find_tool SHA1SUM sha1sum gsha1sum shasum sha1
 532 fi
 533
 534 use_libtool=0
 535 # We'd like to use grep -E, to see if any of LT_INIT,
 536 # AC_PROG_LIBTOOL, AM_PROG_LIBTOOL is used in configure.ac,
 537 # but that's not portable enough (e.g., for Solaris).
 538 grep '^[         ]*A[CM]_PROG_LIBTOOL' configure.ac >/dev/null \
 539   && use_libtool=1
 540 grep '^[         ]*LT_INIT' configure.ac >/dev/null \
 541   && use_libtool=1
 542 if test $use_libtool = 1; then
 543   find_tool LIBTOOLIZE glibtoolize libtoolize
 544 fi
 545
 546 # gnulib-tool requires at least automake and autoconf.
 547 # If either is not listed, add it (with minimum version) as a prerequisite.
 548 case $buildreq in
 549   *automake*) ;;
 550   *) buildreq="automake 1.9
 551 $buildreq" ;;
 552 esac
 553 case $buildreq in
 554   *autoconf*) ;;
 555   *) buildreq="autoconf 2.59
 556 $buildreq" ;;
 557 esac
 558
 559 # When we can deduce that gnulib-tool will require patch,
 560 # and when patch is not already listed as a prerequisite, add it, too.
 561 if test -d "$local_gl_dir" \
 562     && ! find "$local_gl_dir" -name '*.diff' -exec false {} +; then
 563   case $buildreq in
 564     *patch*) ;;
 565     *) buildreq="patch -
 566 $buildreq" ;;
 567   esac
 568 fi
 569
 570 if ! printf "$buildreq" | check_versions; then
 571   echo >&2
 572   if test -f README-prereq; then
 573     die "See README-prereq for how to get the prerequisite programs"
 574   else
 575     die "Please install the prerequisite programs"
 576   fi
 577 fi
 578
 579 # Warn the user if autom4te appears to be broken; this causes known
 580 # issues with at least gettext 0.18.3.
 581 probe=$(echo 'm4_quote([hi])' | autom4te -l M4sugar -t 'm4_quote:$%' -)
 582 if test "x$probe" != xhi; then
 583   warn_ "WARNING: your autom4te wrapper eats stdin;"
 584   warn_ "if bootstrap fails, consider upgrading your autotools"
 585 fi
 586
 587 echo "$0: Bootstrapping from checked-out $package sources..."
 588
 589 # See if we can use gnulib's git-merge-changelog merge driver.
 590 if $use_git && test -d .git && check_exists git; then
 591   if git config merge.merge-changelog.driver >/dev/null ; then
 592     :
 593   elif check_exists git-merge-changelog; then
 594     echo "$0: initializing git-merge-changelog driver"
 595     git config merge.merge-changelog.name 'GNU-style ChangeLog merge driver'
 596     git config merge.merge-changelog.driver 'git-merge-changelog %O %A %B'
 597   else
 598     echo "$0: consider installing git-merge-changelog from gnulib"
 599   fi
 600 fi
 601
 602
 603 cleanup_gnulib() {
 604   status=$?
 605   rm -fr "$gnulib_path"
 606   exit $status
 607 }
 608
 609 git_modules_config () {
 610   test -f .gitmodules && git config --file .gitmodules "$@"
 611 }
 612
 613 if $use_git; then
 614   gnulib_path=$(git_modules_config submodule.gnulib.path)
 615   test -z "$gnulib_path" && gnulib_path=gnulib
 616 fi
 617
 618 # Get gnulib files.  Populate $GNULIB_SRCDIR, possibly updating a
 619 # submodule, for use in the rest of the script.
 620
 621 case ${GNULIB_SRCDIR--} in
 622 -)
 623   # Note that $use_git is necessarily true in this case.
 624   if git_modules_config submodule.gnulib.url >/dev/null; then
 625     echo "$0: getting gnulib files..."
 626     git submodule init -- "$gnulib_path" || exit $?
 627     git submodule update -- "$gnulib_path" || exit $?
 628
 629   elif [ ! -d "$gnulib_path" ]; then
 630     echo "$0: getting gnulib files..."
 631
 632     trap cleanup_gnulib 1 2 13 15
 633
 634     shallow=
 635     git clone -h 2>&1 | grep -- --depth > /dev/null && shallow='--depth 2'
 636     git clone $shallow git://git.sv.gnu.org/gnulib "$gnulib_path" ||
 637       cleanup_gnulib
 638
 639     trap - 1 2 13 15
 640   fi
 641   GNULIB_SRCDIR=$gnulib_path
 642   ;;
 643 *)
 644   # Use GNULIB_SRCDIR directly or as a reference.
 645   if $use_git && test -d "$GNULIB_SRCDIR"/.git && \
 646         git_modules_config submodule.gnulib.url >/dev/null; then
 647     echo "$0: getting gnulib files..."
 648     if git submodule -h|grep -- --reference > /dev/null; then
 649       # Prefer the one-liner available in git 1.6.4 or newer.
 650       git submodule update --init --reference "$GNULIB_SRCDIR" \
 651         "$gnulib_path" || exit $?
 652     else
 653       # This fallback allows at least git 1.5.5.
 654       if test -f "$gnulib_path"/gnulib-tool; then
 655         # Since file already exists, assume submodule init already complete.
 656         git submodule update -- "$gnulib_path" || exit $?
 657       else
 658         # Older git can't clone into an empty directory.
 659         rmdir "$gnulib_path" 2>/dev/null
 660         git clone --reference "$GNULIB_SRCDIR" \
 661           "$(git_modules_config submodule.gnulib.url)" "$gnulib_path" \
 662           && git submodule init -- "$gnulib_path" \
 663           && git submodule update -- "$gnulib_path" \
 664           || exit $?
 665       fi
 666     fi
 667     GNULIB_SRCDIR=$gnulib_path
 668   fi
 669   ;;
 670 esac
 671
 672 # $GNULIB_SRCDIR now points to the version of gnulib to use, and
 673 # we no longer need to use git or $gnulib_path below here.
 674
 675 if $bootstrap_sync; then
 676   cmp -s "$0" "$GNULIB_SRCDIR/build-aux/bootstrap" || {
 677     echo "$0: updating bootstrap and restarting..."
 678     case $(sh -c 'echo "$1"' -- a) in
 679       a) ignored=--;;
 680       *) ignored=ignored;;
 681     esac
 682     exec sh -c \
 683       'cp "$1" "$2" && shift && exec "${CONFIG_SHELL-/bin/sh}" "$@"' \
 684       $ignored "$GNULIB_SRCDIR/build-aux/bootstrap" \
 685       "$0" "$@" --no-bootstrap-sync
 686   }
 687 fi
 688
 689 gnulib_tool=$GNULIB_SRCDIR/gnulib-tool
 690 <$gnulib_tool || exit $?
 691
 692 # Get translations.
 693
 694 download_po_files() {
 695   subdir=$1
 696   domain=$2
 697   echo "$me: getting translations into $subdir for $domain..."
 698   cmd=$(printf "$po_download_command_format" "$domain" "$subdir")
 699   eval "$cmd" && return
 700   # Fallback to HTTP.
 701   cmd=$(printf "$po_download_command_format2" "$subdir" "$domain")
 702   eval "$cmd"
 703 }
 704
 705 # Mirror .po files to $po_dir/.reference and copy only the new
 706 # or modified ones into $po_dir.  Also update $po_dir/LINGUAS.
 707 # Note po files that exist locally only are left in $po_dir but will
 708 # not be included in LINGUAS and hence will not be distributed.
 709 update_po_files() {
 710   # Directory containing primary .po files.
 711   # Overwrite them only when we're sure a .po file is new.
 712   po_dir=$1
 713   domain=$2
 714
 715   # Mirror *.po files into this dir.
 716   # Usually contains *.s1 checksum files.
 717   ref_po_dir="$po_dir/.reference"
 718
 719   test -d $ref_po_dir || mkdir $ref_po_dir || return
 720   download_po_files $ref_po_dir $domain \
 721     && ls "$ref_po_dir"/*.po 2>/dev/null |
 722       sed 's|.*/||; s|\.po$||' > "$po_dir/LINGUAS" || return
 723
 724   langs=$(cd $ref_po_dir && echo *.po | sed 's/\.po//g')
 725   test "$langs" = '*' && langs=x
 726   for po in $langs; do
 727     case $po in x) continue;; esac
 728     new_po="$ref_po_dir/$po.po"
 729     cksum_file="$ref_po_dir/$po.s1"
 730     if ! test -f "$cksum_file" ||
 731         ! test -f "$po_dir/$po.po" ||
 732         ! $SHA1SUM -c "$cksum_file" < "$new_po" > /dev/null 2>&1; then
 733       echo "$me: updated $po_dir/$po.po..."
 734       cp "$new_po" "$po_dir/$po.po" \
 735           && $SHA1SUM < "$new_po" > "$cksum_file" || return
 736     fi
 737   done
 738 }
 739
 740 case $SKIP_PO in
 741 '')
 742   if test -d po; then
 743     update_po_files po $package || exit
 744   fi
 745
 746   if test -d runtime-po; then
 747     update_po_files runtime-po $package-runtime || exit
 748   fi;;
 749 esac
 750
 751 symlink_to_dir()
 752 {
 753   src=$1/$2
 754   dst=${3-$2}
 755
 756   test -f "$src" && {
 757
 758     # If the destination directory doesn't exist, create it.
 759     # This is required at least for "lib/uniwidth/cjk.h".
 760     dst_dir=$(dirname "$dst")
 761     if ! test -d "$dst_dir"; then
 762       mkdir -p "$dst_dir"
 763
 764       # If we've just created a directory like lib/uniwidth,
 765       # tell version control system(s) it's ignorable.
 766       # FIXME: for now, this does only one level
 767       parent=$(dirname "$dst_dir")
 768       for dot_ig in x $vc_ignore; do
 769         test $dot_ig = x && continue
 770         ig=$parent/$dot_ig
 771         insert_vc_ignore $ig "${dst_dir##*/}"
 772       done
 773     fi
 774
 775     if $copy; then
 776       {
 777         test ! -h "$dst" || {
 778           echo "$me: rm -f $dst" &&
 779           rm -f "$dst"
 780         }
 781       } &&
 782       test -f "$dst" &&
 783       cmp -s "$src" "$dst" || {
 784         echo "$me: cp -fp $src $dst" &&
 785         cp -fp "$src" "$dst"
 786       }
 787     else
 788       # Leave any existing symlink alone, if it already points to the source,
 789       # so that broken build tools that care about symlink times
 790       # aren't confused into doing unnecessary builds.  Conversely, if the
 791       # existing symlink's time stamp is older than the source, make it afresh,
 792       # so that broken tools aren't confused into skipping needed builds.  See
 793       # <http://lists.gnu.org/archive/html/bug-gnulib/2011-05/msg00326.html>.
 794       test -h "$dst" &&
 795       src_ls=$(ls -diL "$src" 2>/dev/null) && set $src_ls && src_i=$1 &&
 796       dst_ls=$(ls -diL "$dst" 2>/dev/null) && set $dst_ls && dst_i=$1 &&
 797       test "$src_i" = "$dst_i" &&
 798       both_ls=$(ls -dt "$src" "$dst") &&
 799       test "X$both_ls" = "X$dst$nl$src" || {
 800         dot_dots=
 801         case $src in
 802         /*) ;;
 803         *)
 804           case /$dst/ in
 805           *//* | */../* | */./* | /*/*/*/*/*/)
 806              die "invalid symlink calculation: $src -> $dst";;
 807           /*/*/*/*/)    dot_dots=../../../;;
 808           /*/*/*/)      dot_dots=../../;;
 809           /*/*/)        dot_dots=../;;
 810           esac;;
 811         esac
 812
 813         echo "$me: ln -fs $dot_dots$src $dst" &&
 814         ln -fs "$dot_dots$src" "$dst"
 815       }
 816     fi
 817   }
 818 }
 819
 820 version_controlled_file() {
 821   parent=$1
 822   file=$2
 823   if test -d .git; then
 824     git rm -n "$file" > /dev/null 2>&1
 825   elif test -d .svn; then
 826     svn log -r HEAD "$file" > /dev/null 2>&1
 827   elif test -d CVS; then
 828     grep -F "/${file##*/}/" "$parent/CVS/Entries" 2>/dev/null |
 829              grep '^/[^/]*/[0-9]' > /dev/null
 830   else
 831     warn_ "no version control for $file?"
 832     false
 833   fi
 834 }
 835
 836 # NOTE: we have to be careful to run both autopoint and libtoolize
 837 # before gnulib-tool, since gnulib-tool is likely to provide newer
 838 # versions of files "installed" by these two programs.
 839 # Then, *after* gnulib-tool (see below), we have to be careful to
 840 # run autoreconf in such a way that it does not run either of these
 841 # two just-pre-run programs.
 842
 843 # Import from gettext.
 844 with_gettext=yes
 845 grep '^[         ]*AM_GNU_GETTEXT_VERSION(' configure.ac >/dev/null || \
 846     with_gettext=no
 847
 848 if test $with_gettext = yes || test $use_libtool = 1; then
 849
 850   tempbase=.bootstrap$$
 851   trap "rm -f $tempbase.0 $tempbase.1" 1 2 13 15
 852
 853   > $tempbase.0 > $tempbase.1 &&
 854   find . ! -type d -print | sort > $tempbase.0 || exit
 855
 856   if test $with_gettext = yes; then
 857     # Released autopoint has the tendency to install macros that have been
 858     # obsoleted in current gnulib, so run this before gnulib-tool.
 859     echo "$0: $AUTOPOINT --force"
 860     $AUTOPOINT --force || exit
 861   fi
 862
 863   # Autoreconf runs aclocal before libtoolize, which causes spurious
 864   # warnings if the initial aclocal is confused by the libtoolized
 865   # (or worse out-of-date) macro directory.
 866   # libtoolize 1.9b added the --install option; but we support back
 867   # to libtoolize 1.5.22, where the install action was default.
 868   if test $use_libtool = 1; then
 869     install=
 870     case $($LIBTOOLIZE --help) in
 871       *--install*) install=--install ;;
 872     esac
 873     echo "running: $LIBTOOLIZE $install --copy"
 874     $LIBTOOLIZE $install --copy
 875   fi
 876
 877   find . ! -type d -print | sort >$tempbase.1
 878   old_IFS=$IFS
 879   IFS=$nl
 880   for file in $(comm -13 $tempbase.0 $tempbase.1); do
 881     IFS=$old_IFS
 882     parent=${file%/*}
 883     version_controlled_file "$parent" "$file" || {
 884       for dot_ig in x $vc_ignore; do
 885         test $dot_ig = x && continue
 886         ig=$parent/$dot_ig
 887         insert_vc_ignore "$ig" "${file##*/}"
 888       done
 889     }
 890   done
 891   IFS=$old_IFS
 892
 893   rm -f $tempbase.0 $tempbase.1
 894   trap - 1 2 13 15
 895 fi
 896
 897 # Import from gnulib.
 898
 899 gnulib_tool_options="\
 900  --import\
 901  --no-changelog\
 902  --aux-dir $build_aux\
 903  --doc-base $doc_base\
 904  --lib $gnulib_name\
 905  --m4-base $m4_base/\
 906  --source-base $source_base/\
 907  --tests-base $tests_base\
 908  --local-dir $local_gl_dir\
 909  $gnulib_tool_option_extras\
 910 "
 911 if test $use_libtool = 1; then
 912   case "$gnulib_tool_options " in
 913     *' --libtool '*) ;;
 914     *) gnulib_tool_options="$gnulib_tool_options --libtool" ;;
 915   esac
 916 fi
 917 echo "$0: $gnulib_tool $gnulib_tool_options --import ..."
 918 $gnulib_tool $gnulib_tool_options --import $gnulib_modules &&
 919
 920 for file in $gnulib_files; do
 921   symlink_to_dir "$GNULIB_SRCDIR" $file \
 922     || die "failed to symlink $file"
 923 done
 924
 925 bootstrap_post_import_hook \
 926   || die "bootstrap_post_import_hook failed"
 927
 928 # Remove any dangling symlink matching "*.m4" or "*.[ch]" in some
 929 # gnulib-populated directories.  Such .m4 files would cause aclocal to fail.
 930 # The following requires GNU find 4.2.3 or newer.  Considering the usual
 931 # portability constraints of this script, that may seem a very demanding
 932 # requirement, but it should be ok.  Ignore any failure, which is fine,
 933 # since this is only a convenience to help developers avoid the relatively
 934 # unusual case in which a symlinked-to .m4 file is git-removed from gnulib
 935 # between successive runs of this script.
 936 find "$m4_base" "$source_base" \
 937   -depth \( -name '*.m4' -o -name '*.[ch]' \) \
 938   -type l -xtype l -delete > /dev/null 2>&1
 939
 940 # Invoke autoreconf with --force --install to ensure upgrades of tools
 941 # such as ylwrap.
 942 AUTORECONFFLAGS="--verbose --install --force -I $m4_base $ACLOCAL_FLAGS"
 943
 944 # Some systems (RHEL 5) are using ancient autotools, for which the
 945 # --no-recursive option had not been invented.  Detect that lack and
 946 # omit the option when it's not supported.  FIXME in 2017: remove this
 947 # hack when RHEL 5 autotools are updated, or when they become irrelevant.
 948 case $($AUTORECONF --help) in
 949   *--no-recursive*) AUTORECONFFLAGS="$AUTORECONFFLAGS --no-recursive";;
 950 esac
 951
 952 # Tell autoreconf not to invoke autopoint or libtoolize; they were run above.
 953 echo "running: AUTOPOINT=true LIBTOOLIZE=true $AUTORECONF $AUTORECONFFLAGS"
 954 AUTOPOINT=true LIBTOOLIZE=true $AUTORECONF $AUTORECONFFLAGS \
 955   || die "autoreconf failed"
 956
 957 # Get some extra files from gnulib, overriding existing files.
 958 for file in $gnulib_extra_files; do
 959   case $file in
 960   */INSTALL) dst=INSTALL;;
 961   build-aux/*) dst=$build_aux/${file#build-aux/};;
 962   *) dst=$file;;
 963   esac
 964   symlink_to_dir "$GNULIB_SRCDIR" $file $dst \
 965     || die "failed to symlink $file"
 966 done
 967
 968 if test $with_gettext = yes; then
 969   # Create gettext configuration.
 970   echo "$0: Creating po/Makevars from po/Makevars.template ..."
 971   rm -f po/Makevars
 972   sed '
 973     /^EXTRA_LOCALE_CATEGORIES *=/s/=.*/= '"$EXTRA_LOCALE_CATEGORIES"'/
 974     /^COPYRIGHT_HOLDER *=/s/=.*/= '"$COPYRIGHT_HOLDER"'/
 975     /^MSGID_BUGS_ADDRESS *=/s|=.*|= '"$MSGID_BUGS_ADDRESS"'|
 976     /^XGETTEXT_OPTIONS *=/{
 977       s/$/ \\/
 978       a\
 979           '"$XGETTEXT_OPTIONS"' $${end_of_xgettext_options+}
 980     }
 981   ' po/Makevars.template >po/Makevars \
 982     || die 'cannot generate po/Makevars'
 983
 984   # If the 'gettext' module is in use, grab the latest Makefile.in.in.
 985   # If only the 'gettext-h' module is in use, assume autopoint already
 986   # put the correct version of this file into place.
 987   case $gnulib_modules in
 988   *gettext-h*) ;;
 989   *gettext*)
 990     cp $GNULIB_SRCDIR/build-aux/po/Makefile.in.in po/Makefile.in.in \
 991       || die "cannot create po/Makefile.in.in"
 992     ;;
 993   esac
 994
 995   if test -d runtime-po; then
 996     # Similarly for runtime-po/Makevars, but not quite the same.
 997     rm -f runtime-po/Makevars
 998     sed '
 999       /^DOMAIN *=.*/s/=.*/= '"$package"'-runtime/
1000       /^subdir *=.*/s/=.*/= runtime-po/
1001       /^MSGID_BUGS_ADDRESS *=/s/=.*/= bug-'"$package"'@gnu.org/
1002       /^XGETTEXT_OPTIONS *=/{
1003         s/$/ \\/
1004         a\
1005             '"$XGETTEXT_OPTIONS_RUNTIME"' $${end_of_xgettext_options+}
1006       }
1007     ' po/Makevars.template >runtime-po/Makevars \
1008     || die 'cannot generate runtime-po/Makevars'
1009
1010     # Copy identical files from po to runtime-po.
1011     (cd po && cp -p Makefile.in.in *-quot *.header *.sed *.sin ../runtime-po)
1012   fi
1013 fi
1014
1015 bootstrap_epilogue
1016
1017 echo "$0: done.  Now you can run './configure'."
1018
1019 # Local variables:
1020 # eval: (add-hook 'write-file-hooks 'time-stamp)
1021 # time-stamp-start: "scriptversion="
1022 # time-stamp-format: "%:y-%02m-%02d.%02H"
1023 # time-stamp-time-zone: "UTC"
1024 # time-stamp-end: "; # UTC"
1025 # End: