summaryrefslogtreecommitdiff
path: root/bootstrap
blob: 70fd73cc745073f9e5bced1137a6c5115b6d7b6c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
#! /bin/sh
# Print a version string.
scriptversion=2019-01-04.17; # UTC

# Bootstrap this package from checked-out sources.

# Copyright (C) 2003-2020 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 <https://www.gnu.org/licenses/>.

# Originally written by Paul Eggert.  The canonical version of this
# script is maintained as build-aux/bootstrap in gnulib, however, to
# be useful to your project, you should place a copy of it under
# version control in the top-level directory of your project.  The
# intent is that all customization can be done with a bootstrap.conf
# file also maintained in your version control; gnulib comes with a
# template build-aux/bootstrap.conf to get you started.

# Please report bugs or propose patches to bug-gnulib@gnu.org.

nl='
'

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

# Ensure that CDPATH is not set.  Otherwise, the output from cd
# would cause trouble in at least one use below.
(unset CDPATH) >/dev/null 2>&1 && unset CDPATH

local_gl_dir=gl

# Honor $PERL, but work even if there is none.
PERL="${PERL-perl}"

me=$0

default_gnulib_url=git://git.sv.gnu.org/gnulib

usage() {
  cat <<EOF
Usage: $me [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.  Defaults to \$GNULIB_SRCDIR
 --bootstrap-sync         if this bootstrap script is not identical to
                          the version in the local gnulib sources,
                          update this script, and then restart it with
                          /bin/sh or the shell \$CONFIG_SHELL
 --no-bootstrap-sync      do not check whether bootstrap is out of sync
 --copy                   copy files instead of creating symbolic links
 --force                  attempt to bootstrap even if the sources seem
                          not to have been checked out
 --no-git                 do not use git to update gnulib.  Requires that
                          --gnulib-srcdir point to a correct gnulib snapshot
 --skip-po                do not download po files

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

For build prerequisites, environment variables like \$AUTOCONF and \$AMTAR
are honored.

Gnulib sources can be fetched in various ways:

 * If this package is in a git repository with a 'gnulib' submodule
   configured, then that submodule is initialized and updated and sources
   are fetched from there.  If \$GNULIB_SRCDIR is set (directly or via
   --gnulib-srcdir) and is a git repository, then it is used as a reference.

 * Otherwise, if \$GNULIB_SRCDIR is set (directly or via --gnulib-srcdir),
   then sources are fetched from that local directory.  If it is a git
   repository and \$GNULIB_REVISION is set, then that revision is checked
   out.

 * Otherwise, if this package is in a git repository with a 'gnulib'
   submodule configured, then that submodule is initialized and updated and
   sources are fetched from there.

 * Otherwise, if the 'gnulib' directory does not exist, Gnulib sources are
   cloned into that directory using git from \$GNULIB_URL, defaulting to
   $default_gnulib_url.
   If \$GNULIB_REVISION is set, then that revision is checked out.

 * Otherwise, the existing Gnulib sources in the 'gnulib' directory are
   used.  If it is a git repository and \$GNULIB_REVISION is set, then that
   revision is checked out.

If you maintain a package and want to pin a particular revision of the
Gnulib sources that has been tested with your package, then there are two
possible approaches: either configure a 'gnulib' submodule with the
appropriate revision, or set \$GNULIB_REVISION (and if necessary
\$GNULIB_URL) in $me.conf.

Running without arguments will suffice in most cases.
EOF
}

# warnf_ FORMAT-STRING ARG1...
warnf_ ()
{
  warnf_format_=$1
  shift
  nl='
'
  case $* in
    *$nl*) me_=$(printf "$me"|tr "$nl|" '??')
       printf "$warnf_format_" "$@" | sed "s|^|$me_: |" ;;
    *) printf "$me: $warnf_format_" "$@" ;;
  esac >&2
}

# warn_ WORD1...
warn_ ()
{
  # If IFS does not start with ' ', set it and emit the warning in a subshell.
  case $IFS in
    ' '*) warnf_ '%s\n' "$*";;
    *)    (IFS=' '; warn_ "$@");;
  esac
}

# die WORD1...
die() { warn_ "$@"; exit 1; }

# 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=

: ${AUTOPOINT=autopoint}
: ${AUTORECONF=autoreconf}

# A function to be called right after gnulib-tool is run.
# Override it via your own definition in bootstrap.conf.
bootstrap_post_import_hook() { :; }

# A function to be called after everything else in this script.
# Override it via your own definition in bootstrap.conf.
bootstrap_epilogue() { :; }

# The command to download all .po files for a specified domain into a
# specified directory.  Fill in the first %s with the destination
# directory and the second with the domain name.
po_download_command_format=\
"wget --mirror --level=1 -nd -nv -A.po -P '%s' \
 https://translationproject.org/latest/%s/"

# Prefer a non-empty tarname (4th argument of AC_INIT if given), else
# fall back to the package name (1st argument with munging)
extract_package_name='
  /^AC_INIT(\[*/{
     s///
     /^[^,]*,[^,]*,[^,]*,[ []*\([^][ ,)]\)/{
       s//\1/
       s/[],)].*//
       p
       q
     }
     s/[],)].*//
     s/^GNU //
     y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/
     s/[^abcdefghijklmnopqrstuvwxyz0123456789_]/-/g
     p
  }
'
package=$(sed -n "$extract_package_name" configure.ac) \
  || die 'cannot find package name in configure.ac'
gnulib_name=lib$package

build_aux=build-aux
source_base=lib
m4_base=m4
doc_base=doc
tests_base=tests
gnulib_extra_files="
        build-aux/install-sh
        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 and copyright holder for gettext files
COPYRIGHT_HOLDER='Free Software Foundation, Inc.'
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

# Set this to true in bootstrap.conf to enable --bootstrap-sync by
# default.
bootstrap_sync=false

# Use git to update gnulib sources
use_git=true

check_exists() {
  if test "$1" = "--verbose"; then
    ($2 --version </dev/null) >/dev/null 2>&1
    if test $? -ge 126; then
      # If not found, run with diagnostics as one may be
      # presented with env variables to set to find the right version
      ($2 --version </dev/null)
    fi
  else
    ($1 --version </dev/null) >/dev/null 2>&1
  fi

  test $? -lt 126
}

# find_tool ENVVAR NAMES...
# -------------------------
# Search for a required program.  Use the value of ENVVAR, if set,
# otherwise find the first of the NAMES that can be run.
# If found, set ENVVAR to the program name, die otherwise.
#
# FIXME: code duplication, see also gnu-web-doc-update.
find_tool ()
{
  find_tool_envvar=$1
  shift
  find_tool_names=$@
  eval "find_tool_res=\$$find_tool_envvar"
  if test x"$find_tool_res" = x; then
    for i; do
      if check_exists $i; then
        find_tool_res=$i
        break
      fi
    done
  fi
  if test x"$find_tool_res" = x; then
    warn_ "one of these is required: $find_tool_names;"
    die   "alternatively set $find_tool_envvar to a compatible tool"
  fi
  eval "$find_tool_envvar=\$find_tool_res"
  eval "export $find_tool_envvar"
}

# 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

if test x"$gnulib_modules$gnulib_files$gnulib_extra_files" = x; then
  use_gnulib=false
else
  use_gnulib=true
fi

# Translate configuration into internal form.

# Parse options.

for option
do
  case $option in
  --help)
    usage
    exit;;
  --gnulib-srcdir=*)
    GNULIB_SRCDIR=${option#--gnulib-srcdir=};;
  --skip-po)
    SKIP_PO=t;;
  --force)
    checkout_only_file=;;
  --copy)
    copy=true;;
  --bootstrap-sync)
    bootstrap_sync=true;;
  --no-bootstrap-sync)
    bootstrap_sync=false;;
  --no-git)
    use_git=false;;
  *)
    die "$option: unknown option";;
  esac
done

$use_git || test -d "$GNULIB_SRCDIR" \
  || die "Error: --no-git requires --gnulib-srcdir"

if test -n "$checkout_only_file" && test ! -r "$checkout_only_file"; then
  die "Bootstrapping from a non-checked-out distribution is risky."
fi

# Strip blank and comment lines to leave significant entries.
gitignore_entries() {
  sed '/^#/d; /^$/d' "$@"
}

# If $STR is not already on a line by itself in $FILE, insert it at the start.
# Entries are inserted at the start of the ignore list to ensure existing
# entries starting with ! are not overridden.  Such entries support
# whitelisting exceptions after a more generic blacklist pattern.
insert_if_absent() {
  file=$1
  str=$2
  test -f $file || touch $file
  test -r $file || die "Error: failed to read ignore file: $file"
  duplicate_entries=$(gitignore_entries $file | sort | uniq -d)
  if [ "$duplicate_entries" ] ; then
    die "Error: Duplicate entries in $file: " $duplicate_entries
  fi
  linesold=$(gitignore_entries $file | wc -l)
  linesnew=$( { echo "$str"; cat $file; } | gitignore_entries | sort -u | wc -l)
  if [ $linesold != $linesnew ] ; then
    { echo "$str" | cat - $file > $file.bak && mv $file.bak $file; } \
      || die "insert_if_absent $file $str: failed"
  fi
}

# Adjust $PATTERN for $VC_IGNORE_FILE and insert it with
# insert_if_absent.
insert_vc_ignore() {
  vc_ignore_file="$1"
  pattern="$2"
  case $vc_ignore_file in
  *.gitignore)
    # A .gitignore entry that does not start with '/' applies
    # recursively to subdirectories, so prepend '/' to every
    # .gitignore entry.
    pattern=$(echo "$pattern" | sed s,^,/,);;
  esac
  insert_if_absent "$vc_ignore_file" "$pattern"
}

# 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
test $found_aux_dir = yes \
  || die "configure.ac lacks 'AC_CONFIG_AUX_DIR([$build_aux])'; add it"

# 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_vc_ignore $dot_ig $build_aux
  done
fi

# Note this deviates from the version comparison in automake
# in that it treats 1.5 < 1.5.0, and treats 1.4.4a < 1.4-p3a
# but this should suffice as we won't be specifying old
# version formats or redundant trailing .0 in bootstrap.conf.
# If we did want full compatibility then we should probably
# use m4_version_compare from autoconf.
sort_ver() { # sort -V is not generally available
  ver1="$1"
  ver2="$2"

  # split on '.' and compare each component
  i=1
  while : ; do
    p1=$(echo "$ver1" | cut -d. -f$i)
    p2=$(echo "$ver2" | cut -d. -f$i)
    if [ ! "$p1" ]; then
      echo "$1 $2"
      break
    elif [ ! "$p2" ]; then
      echo "$2 $1"
      break
    elif [ ! "$p1" = "$p2" ]; then
      if [ "$p1" -gt "$p2" ] 2>/dev/null; then # numeric comparison
        echo "$2 $1"
      elif [ "$p2" -gt "$p1" ] 2>/dev/null; then # numeric comparison
        echo "$1 $2"
      else # numeric, then lexicographic comparison
        lp=$(printf "$p1\n$p2\n" | LANG=C sort -n | tail -n1)
        if [ "$lp" = "$p2" ]; then
          echo "$1 $2"
        else
          echo "$2 $1"
        fi
      fi
      break
    fi
    i=$(($i+1))
  done
}

get_version_sed='
# Move version to start of line.
s/.*[v ]\([0-9]\)/\1/

# Skip lines that do not start with version.
/^[0-9]/!d

# Remove characters after the version.
s/[^.a-z0-9-].*//

# The first component must be digits only.
s/^\([0-9]*\)[a-z-].*/\1/

#the following essentially does s/5.005/5.5/
s/\.0*\([1-9]\)/.\1/g
p
q'

get_version() {
  app=$1

  $app --version >/dev/null 2>&1 || { $app --version; return 1; }

  $app --version 2>&1 | sed -n "$get_version_sed"
}

check_versions() {
  ret=0

  while read app req_ver; do
    # We only need libtoolize from the libtool package.
    if test "$app" = libtool; then
      app=libtoolize
    fi
    # Exempt git if --no-git is in effect.
    if test "$app" = git; then
      $use_git || continue
    fi
    # Honor $APP variables ($TAR, $AUTOCONF, etc.)
    appvar=$(echo $app | LC_ALL=C tr '[a-z]-' '[A-Z]_')
    test "$appvar" = TAR && appvar=AMTAR
    case $appvar in
        GZIP) ;; # Do not use $GZIP:  it contains gzip options.
        PERL::*) ;; # Keep perl modules as-is
        *) eval "app=\${$appvar-$app}" ;;
    esac

    # Handle the still-experimental Automake-NG programs specially.
    # They remain named as the mainstream Automake programs ("automake",
    # and "aclocal") to avoid gratuitous incompatibilities with
    # pre-existing usages (by, say, autoreconf, or custom autogen.sh
    # scripts), but correctly identify themselves (as being part of
    # "GNU automake-ng") when asked their version.
    case $app in
      automake-ng|aclocal-ng)
        app=${app%-ng}
        ($app --version | grep '(GNU automake-ng)') >/dev/null 2>&1 || {
          warn_ "Error: '$app' not found or not from Automake-NG"
          ret=1
          continue
        } ;;
      # Another check is for perl modules.  These can be written as
      # e.g. perl::XML::XPath in case of XML::XPath module, etc.
      perl::*)
        # Extract module name
        app="${app#perl::}"
        if ! $PERL -m"$app" -e 'exit 0' >/dev/null 2>&1; then
          warn_ "Error: perl module '$app' not found"
          ret=1
        fi
        continue
        ;;
    esac
    if [ "$req_ver" = "-" ]; then
      # Merely require app to exist; not all prereq apps are well-behaved
      # so we have to rely on $? rather than get_version.
      if ! check_exists --verbose $app; then
        warn_ "Error: '$app' not found"
        ret=1
      fi
    else
      # Require app to produce a new enough version string.
      inst_ver=$(get_version $app)
      if [ ! "$inst_ver" ]; then
        warn_ "Error: '$app' not found"
        ret=1
      else
        latest_ver=$(sort_ver $req_ver $inst_ver | cut -d' ' -f2)
        if [ ! "$latest_ver" = "$inst_ver" ]; then
          warnf_ '%s\n'                                        \
              "Error: '$app' version == $inst_ver is too old"  \
              "       '$app' version >= $req_ver is required"
          ret=1
        fi
      fi
    fi
  done

  return $ret
}

print_versions() {
  echo "Program    Min_version"
  echo "----------------------"
  printf %s "$buildreq"
  echo "----------------------"
  # can't depend on column -t
}

# Find sha1sum, named gsha1sum on MacPorts, shasum on Mac OS X 10.6.
# Also find the compatible sha1 utility on the BSDs
if test x"$SKIP_PO" = x; then
  find_tool SHA1SUM sha1sum gsha1sum shasum sha1
fi

use_libtool=0
# We'd like to use grep -E, to see if any of LT_INIT,
# AC_PROG_LIBTOOL, AM_PROG_LIBTOOL is used in configure.ac,
# but that's not portable enough (e.g., for Solaris).
grep '^[	 ]*A[CM]_PROG_LIBTOOL' configure.ac >/dev/null \
  && use_libtool=1
grep '^[	 ]*LT_INIT' configure.ac >/dev/null \
  && use_libtool=1
if test $use_libtool = 1; then
  find_tool LIBTOOLIZE glibtoolize libtoolize
fi

# gnulib-tool requires at least automake and autoconf.
# If either is not listed, add it (with minimum version) as a prerequisite.
case $buildreq in
  *automake*) ;;
  *) buildreq="automake 1.9
$buildreq" ;;
esac
case $buildreq in
  *autoconf*) ;;
  *) buildreq="autoconf 2.59
$buildreq" ;;
esac

# When we can deduce that gnulib-tool will require patch,
# and when patch is not already listed as a prerequisite, add it, too.
if test -d "$local_gl_dir" \
    && ! find "$local_gl_dir" -name '*.diff' -exec false {} +; then
  case $buildreq in
    *patch*) ;;
    *) buildreq="patch -
$buildreq" ;;
  esac
fi

if ! printf "$buildreq" | check_versions; then
  echo >&2
  if test -f README-prereq; then
    die "See README-prereq for how to get the prerequisite programs"
  else
    die "Please install the prerequisite programs"
  fi
fi

# Warn the user if autom4te appears to be broken; this causes known
# issues with at least gettext 0.18.3.
probe=$(echo 'm4_quote([hi])' | autom4te -l M4sugar -t 'm4_quote:$%' -)
if test "x$probe" != xhi; then
  warn_ "WARNING: your autom4te wrapper eats stdin;"
  warn_ "if bootstrap fails, consider upgrading your autotools"
fi

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

# See if we can use gnulib's git-merge-changelog merge driver.
if $use_git && test -d .git && check_exists git; then
  if git config merge.merge-changelog.driver >/dev/null ; then
    :
  elif check_exists git-merge-changelog; then
    echo "$0: 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 "$0: consider installing git-merge-changelog from gnulib"
  fi
fi


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

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

if $use_gnulib; then
  if $use_git; then
    gnulib_path=$(git_modules_config submodule.gnulib.path)
    test -z "$gnulib_path" && gnulib_path=gnulib
  fi

  # Get gnulib files.  Populate $GNULIB_SRCDIR, possibly updating a
  # submodule, for use in the rest of the script.

  case ${GNULIB_SRCDIR--} in
  -)
    # Note that $use_git is necessarily true in this case.
    if git_modules_config submodule.gnulib.url >/dev/null; then
      echo "$0: getting gnulib files..."
      git submodule init -- "$gnulib_path" || exit $?
      git submodule update -- "$gnulib_path" || exit $?

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

      trap cleanup_gnulib 1 2 13 15

      shallow=
      if test -z "$GNULIB_REVISION"; then
        git clone -h 2>&1 | grep -- --depth > /dev/null && shallow='--depth 2'
      fi
      git clone $shallow ${GNULIB_URL:-$default_gnulib_url} "$gnulib_path" \
        || cleanup_gnulib

      trap - 1 2 13 15
    fi
    GNULIB_SRCDIR=$gnulib_path
    ;;
  *)
    # Use GNULIB_SRCDIR directly or as a reference.
    if $use_git && test -d "$GNULIB_SRCDIR"/.git && \
          git_modules_config submodule.gnulib.url >/dev/null; then
      echo "$0: getting gnulib files..."
      if git submodule -h|grep -- --reference > /dev/null; then
        # Prefer the one-liner available in git 1.6.4 or newer.
        git submodule update --init --reference "$GNULIB_SRCDIR" \
          "$gnulib_path" || exit $?
      else
        # This fallback allows at least git 1.5.5.
        if test -f "$gnulib_path"/gnulib-tool; then
          # Since file already exists, assume submodule init already complete.
          git submodule update -- "$gnulib_path" || exit $?
        else
          # Older git can't clone into an empty directory.
          rmdir "$gnulib_path" 2>/dev/null
          git clone --reference "$GNULIB_SRCDIR" \
            "$(git_modules_config submodule.gnulib.url)" "$gnulib_path" \
            && git submodule init -- "$gnulib_path" \
            && git submodule update -- "$gnulib_path" \
            || exit $?
        fi
      fi
      GNULIB_SRCDIR=$gnulib_path
    fi
    ;;
  esac

  if test -d "$GNULIB_SRCDIR"/.git && test -n "$GNULIB_REVISION" \
     && ! git_modules_config submodule.gnulib.url >/dev/null; then
    (cd "$GNULIB_SRCDIR" && git checkout "$GNULIB_REVISION") || cleanup_gnulib
  fi

  # $GNULIB_SRCDIR now points to the version of gnulib to use, and
  # we no longer need to use git or $gnulib_path below here.

  if $bootstrap_sync; then
    cmp -s "$0" "$GNULIB_SRCDIR/build-aux/bootstrap" || {
      echo "$0: updating bootstrap and restarting..."
      case $(sh -c 'echo "$1"' -- a) in
        a) ignored=--;;
        *) ignored=ignored;;
      esac
      exec sh -c \
        'cp "$1" "$2" && shift && exec "${CONFIG_SHELL-/bin/sh}" "$@"' \
        $ignored "$GNULIB_SRCDIR/build-aux/bootstrap" \
        "$0" "$@" --no-bootstrap-sync
    }
  fi

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

# Get translations.

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

# Mirror .po files to $po_dir/.reference and copy only the new
# or modified ones into $po_dir.  Also update $po_dir/LINGUAS.
# Note po files that exist locally only are left in $po_dir but will
# not be included in LINGUAS and hence will not be distributed.
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

  # Mirror *.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" || return

  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" ||
        ! $SHA1SUM -c "$cksum_file" < "$new_po" > /dev/null 2>&1; then
      echo "$me: updated $po_dir/$po.po..."
      cp "$new_po" "$po_dir/$po.po" \
          && $SHA1SUM < "$new_po" > "$cksum_file" || return
    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_vc_ignore $ig "${dst_dir##*/}"
      done
    fi

    if $copy; then
      {
        test ! -h "$dst" || {
          echo "$me: rm -f $dst" &&
          rm -f "$dst"
        }
      } &&
      test -f "$dst" &&
      cmp -s "$src" "$dst" || {
        echo "$me: cp -fp $src $dst" &&
        cp -fp "$src" "$dst"
      }
    else
      # Leave any existing symlink alone, if it already points to the source,
      # so that broken build tools that care about symlink times
      # aren't confused into doing unnecessary builds.  Conversely, if the
      # existing symlink's timestamp is older than the source, make it afresh,
      # so that broken tools aren't confused into skipping needed builds.  See
      # <https://lists.gnu.org/r/bug-gnulib/2011-05/msg00326.html>.
      test -h "$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" = "$dst_i" &&
      both_ls=$(ls -dt "$src" "$dst") &&
      test "X$both_ls" = "X$dst$nl$src" || {
        dot_dots=
        case $src in
        /*) ;;
        *)
          case /$dst/ in
          *//* | */../* | */./* | /*/*/*/*/*/)
             die "invalid symlink calculation: $src -> $dst";;
          /*/*/*/*/)    dot_dots=../../../;;
          /*/*/*/)      dot_dots=../../;;
          /*/*/)        dot_dots=../;;
          esac;;
        esac

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

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

# NOTE: we have to be careful to run both autopoint and libtoolize
# before gnulib-tool, since gnulib-tool is likely to provide newer
# versions of files "installed" by these two programs.
# Then, *after* gnulib-tool (see below), we have to be careful to
# run autoreconf in such a way that it does not run either of these
# two just-pre-run programs.

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

if test $with_gettext = yes || test $use_libtool = 1; then

  tempbase=.bootstrap$$
  trap "rm -f $tempbase.0 $tempbase.1" 1 2 13 15

  > $tempbase.0 > $tempbase.1 &&
  find . ! -type d -print | sort > $tempbase.0 || exit

  if test $with_gettext = yes; then
    # Released autopoint has the tendency to install macros that have been
    # obsoleted in current gnulib, so run this before gnulib-tool.
    echo "$0: $AUTOPOINT --force"
    $AUTOPOINT --force || exit
  fi

  # Autoreconf runs aclocal before libtoolize, which causes spurious
  # warnings if the initial aclocal is confused by the libtoolized
  # (or worse out-of-date) macro directory.
  # libtoolize 1.9b added the --install option; but we support back
  # to libtoolize 1.5.22, where the install action was default.
  if test $use_libtool = 1; then
    install=
    case $($LIBTOOLIZE --help) in
      *--install*) install=--install ;;
    esac
    echo "running: $LIBTOOLIZE $install --copy"
    $LIBTOOLIZE $install --copy
  fi

  find . ! -type d -print | sort >$tempbase.1
  old_IFS=$IFS
  IFS=$nl
  for file in $(comm -13 $tempbase.0 $tempbase.1); do
    IFS=$old_IFS
    parent=${file%/*}
    version_controlled_file "$parent" "$file" || {
      for dot_ig in x $vc_ignore; do
        test $dot_ig = x && continue
        ig=$parent/$dot_ig
        insert_vc_ignore "$ig" "${file##*/}"
      done
    }
  done
  IFS=$old_IFS

  rm -f $tempbase.0 $tempbase.1
  trap - 1 2 13 15
fi

# Import from gnulib.

if $use_gnulib; then
  gnulib_tool_options="\
   --no-changelog\
   --aux-dir=$build_aux\
   --doc-base=$doc_base\
   --lib=$gnulib_name\
   --m4-base=$m4_base/\
   --source-base=$source_base/\
   --tests-base=$tests_base\
   --local-dir=$local_gl_dir\
   $gnulib_tool_option_extras\
  "
  if test $use_libtool = 1; then
    case "$gnulib_tool_options " in
      *' --libtool '*) ;;
      *) gnulib_tool_options="$gnulib_tool_options --libtool" ;;
    esac
  fi
  echo "$0: $gnulib_tool $gnulib_tool_options --import ..."
  $gnulib_tool $gnulib_tool_options --import $gnulib_modules \
    || die "gnulib-tool failed"

  for file in $gnulib_files; do
    symlink_to_dir "$GNULIB_SRCDIR" $file \
      || die "failed to symlink $file"
  done
fi

bootstrap_post_import_hook \
  || die "bootstrap_post_import_hook failed"

# Don't proceed if there are uninitialized submodules.  In particular,
# the next step will remove dangling links, which might be links into
# uninitialized submodules.
#
# Uninitialized submodules are listed with an initial dash.
if $use_git && git submodule | grep '^-' >/dev/null; then
  die "some git submodules are not initialized. "     \
      "Run 'git submodule init' and bootstrap again."
fi

# 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

# Invoke autoreconf with --force --install to ensure upgrades of tools
# such as ylwrap.
AUTORECONFFLAGS="--verbose --install --force -I $m4_base $ACLOCAL_FLAGS"

# Some systems (RHEL 5) are using ancient autotools, for which the
# --no-recursive option had not been invented.  Detect that lack and
# omit the option when it's not supported.  FIXME in 2017: remove this
# hack when RHEL 5 autotools are updated, or when they become irrelevant.
case $($AUTORECONF --help) in
  *--no-recursive*) AUTORECONFFLAGS="$AUTORECONFFLAGS --no-recursive";;
esac

# Tell autoreconf not to invoke autopoint or libtoolize; they were run above.
echo "running: AUTOPOINT=true LIBTOOLIZE=true $AUTORECONF $AUTORECONFFLAGS"
AUTOPOINT=true LIBTOOLIZE=true $AUTORECONF $AUTORECONFFLAGS \
  || die "autoreconf failed"

# 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/${file#build-aux/};;
  *) dst=$file;;
  esac
  symlink_to_dir "$GNULIB_SRCDIR" $file $dst \
    || die "failed to symlink $file"
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"'/
    /^COPYRIGHT_HOLDER *=/s/=.*/= '"$COPYRIGHT_HOLDER"'/
    /^MSGID_BUGS_ADDRESS *=/s|=.*|= '"$MSGID_BUGS_ADDRESS"'|
    /^XGETTEXT_OPTIONS *=/{
      s/$/ \\/
      a\
          '"$XGETTEXT_OPTIONS"' $${end_of_xgettext_options+}
    }
  ' po/Makevars.template >po/Makevars \
    || die 'cannot generate po/Makevars'

  # If the 'gettext' module is in use, grab the latest Makefile.in.in.
  # If only the 'gettext-h' module is in use, assume autopoint already
  # put the correct version of this file into place.
  case $gnulib_modules in
  *gettext-h*) ;;
  *gettext*)
    cp $GNULIB_SRCDIR/build-aux/po/Makefile.in.in po/Makefile.in.in \
      || die "cannot create po/Makefile.in.in"
    ;;
  esac

  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 \
    || die 'cannot generate 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

bootstrap_epilogue

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

# Local variables:
# eval: (add-hook 'before-save-hook 'time-stamp)
# time-stamp-start: "scriptversion="
# time-stamp-format: "%:y-%02m-%02d.%02H"
# time-stamp-time-zone: "UTC0"
# time-stamp-end: "; # UTC"
# End: