summaryrefslogtreecommitdiff
path: root/scripts/repo-add.sh.in
blob: 5159ea2f7a10e281498816986209d58355d33ef3 (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
#!/bin/bash
#
#   repo-add - add a package to a given repo database file
#   repo-remove - remove a package entry from a given repo database file
#   @configure_input@
#
#   Copyright (c) 2006-2012 Pacman Development Team <pacman-dev@archlinux.org>
#
#   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 2 of the License, or
#   (at your option) any later version.
#
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with this program.  If not, see <http://www.gnu.org/licenses/>.

shopt -s extglob

# gettext initialization
export TEXTDOMAIN='pacman-scripts'
export TEXTDOMAINDIR='@localedir@'

declare -r myver='@PACKAGE_VERSION@'
declare -r confdir='@sysconfdir@'

QUIET=0
DELTA=0
WITHFILES=0
SIGN=0
VERIFY=0
REPO_DB_FILE=
LOCKFILE=
CLEAN_LOCK=0

# ensure we have a sane umask set
umask 0022

m4_include(library/output_format.sh)

# print usage instructions
usage() {
  cmd=${0##*/}
  printf -- "%s (pacman) %s\n\n" "$cmd" "$myver"
  if [[ $cmd == "repo-add" ]] ; then
    printf -- "$(gettext "Usage: repo-add [options] <path-to-db> <package|delta> ...\n")"
    printf -- "\n"
    printf -- "$(gettext "\
repo-add will update a package database by reading a package file.\n\
Multiple packages to add can be specified on the command line.\n")"
    printf -- "\n"
    printf -- "$(gettext "Options:\n")"
    printf -- "$(gettext "  -d, --delta       generate and add delta for package update\n")"
    printf -- "$(gettext "  -f, --files       update database's file list\n")"
  elif [[ $cmd == "repo-remove" ]] ; then
    printf -- "$(gettext "Usage: repo-remove [options] <path-to-db> <packagename|delta> ...\n")"
    printf -- "\n"
    printf -- "$(gettext "\
repo-remove will update a package database by removing the package name\n\
specified on the command line from the given repo database. Multiple\n\
packages to remove can be specified on the command line.\n")"
    printf -- "\n"
    printf -- "$(gettext "Options:\n")"
  else
    printf -- "$(gettext "Please move along, there is nothing to see here.\n")"
    return
  fi
  printf -- "$(gettext "  -q, --quiet       minimize output\n")"
  printf -- "$(gettext "  -s, --sign        sign database with GnuPG after update\n")"
  printf -- "$(gettext "  -k, --key <key>   use the specified key to sign the database\n")"
  printf -- "$(gettext "  -v, --verify      verify database's signature before update\n")"
  printf -- "$(gettext "\n\
See %s(8) for more details and descriptions of the available options.\n")" $cmd
  printf "\n"
  if [[ $cmd == "repo-add" ]] ; then
    printf -- "$(gettext "Example:  repo-add /path/to/repo.db.tar.gz pacman-3.0.0-1-i686.pkg.tar.gz\n")"
  elif [[ $cmd == "repo-remove" ]] ; then
    printf -- "$(gettext "Example:  repo-remove /path/to/repo.db.tar.gz kernel26\n")"
  fi
}

version() {
  cmd=${0##*/}
  printf "%s (pacman) %s\n\n" "$cmd" "$myver"
  printf -- "$(gettext "\
Copyright (c) 2006-2012 Pacman Development Team <pacman-dev@archlinux.org>\n\n\
This is free software; see the source for copying conditions.\n\
There is NO WARRANTY, to the extent permitted by law.\n")"
}

# format a metadata entry
#   arg1 - Entry name
#   ...  - value(s)
format_entry() {
  local field=$1; shift

  if [[ $1 ]]; then
    printf '%%%s%%\n' "$field"
    printf '%s\n' "$@"
    printf '\n'
  fi
}

find_pkgentry() {
  local pkgname=$1
  local pkgentry
  for pkgentry in $tmpdir/tree/$pkgname*; do
    name=${pkgentry##*/}
    if [[ ${name%-*-*} = $pkgname ]]; then
      echo $pkgentry
      return 0
    fi
  done
  return 1
}

# Get the package name from the delta filename
get_delta_pkgname() {
  local tmp

  tmp=${1##*/}
  echo ${tmp%-*-*_to*}
}

# write a delta entry
#   arg1 - path to delta file
db_write_delta() {
  deltafile="$1"
  pkgname="$(get_delta_pkgname $deltafile)"

  pkgentry=$(find_pkgentry $pkgname)
  if [[ -z $pkgentry ]]; then
    error "$(gettext "No database entry for package '%s'.")" "$pkgname"
    return 1
  fi
  deltas="$pkgentry/deltas"
  if [[ ! -f $deltas ]]; then
    echo -e "%DELTAS%" >$deltas
  fi
  # get md5sum and compressed size of package
  md5sum="$(openssl dgst -md5 "$deltafile")"
  md5sum="${md5sum##* }"
  csize=$(@SIZECMD@ -L "$deltafile")

  oldfile=$(xdelta3 printhdr $deltafile | grep "XDELTA filename (source)" | sed 's/.*: *//')
  newfile=$(xdelta3 printhdr $deltafile | grep "XDELTA filename (output)" | sed 's/.*: *//')

  if grep -q "$oldfile.*$newfile" $deltas; then
    sed -i.backup "/$oldfile.*$newfile/d" $deltas && rm -f $deltas.backup
  fi
  msg2 "$(gettext "Adding 'deltas' entry : %s -> %s")" "$oldfile" "$newfile"
  echo ${deltafile##*/} $md5sum $csize $oldfile $newfile >> $deltas

  return 0
} # end db_write_delta

# remove a delta entry
#   arg1 - path to delta file
db_remove_delta() {
  deltafile="$1"
  filename=${deltafile##*/}
  pkgname="$(get_delta_pkgname $deltafile)"

  pkgentry=$(find_pkgentry $pkgname)
  if [[ -z $pkgentry ]]; then
    return 1
  fi
  deltas="$pkgentry/deltas"
  if [[ ! -f $deltas ]]; then
    return 1
  fi
  if grep -q "$filename" $deltas; then
    sed -i.backup "/$filename/d" $deltas && rm -f $deltas.backup
    msg2 "$(gettext "Removing existing entry '%s'...")" "$filename"
    # empty deltas file contains only "%DELTAS%"
    if (( $(wc -l < "$deltas") == 1 )); then
      msg2 "$(gettext "Removing empty deltas file ...")"
      rm "$deltas"
    fi
    return 0
  fi

  return 1
} # end db_remove_delta

check_gpg() {
  if ! type -p gpg >/dev/null; then
    error "$(gettext "Cannot find the gpg binary! Is GnuPG installed?")"
    exit 1 # $E_MISSING_PROGRAM
  fi
}

# sign the package database once repackaged
create_signature() {
  (( ! SIGN )) && return
  local dbfile="$1"
  local ret=0
  msg "$(gettext "Signing database...")"

  local SIGNWITHKEY=""
  if [[ -n $GPGKEY ]]; then
    SIGNWITHKEY="-u ${GPGKEY}"
  fi
  gpg --detach-sign --use-agent ${SIGNWITHKEY} "$dbfile" &>/dev/null || ret=$?

  if (( ! ret )); then
    msg2 "$(gettext "Created signature file %s.")" "${dbfile##*/.tmp.}.sig"
  else
    warning "$(gettext "Failed to sign package database.")"
  fi
}

# verify the existing package database signature
verify_signature() {
  (( ! VERIFY )) && return
  local dbfile="$1"
  local ret=0
  msg "$(gettext "Verifying database signature...")"

  if [[ ! -f $dbfile.sig ]]; then
    warning "$(gettext "No existing signature found, skipping verification.")"
    return
  fi
  gpg --verify "$dbfile.sig" || ret=$?
  if (( ! ret )); then
    msg2 "$(gettext "Database signature file verified.")"
  else
    error "$(gettext "Database signature was NOT valid!")"
    exit 1
  fi
}

verify_repo_extension() {
  local repofile=$1

  case "$repofile" in
    *.@(db|files).tar.gz)  TAR_OPT="z" ;;
    *.@(db|files).tar.bz2) TAR_OPT="j" ;;
    *.@(db|files).tar.xz)  TAR_OPT="J" ;;
    *.@(db|files).tar.Z)   TAR_OPT="Z" ;;
    *.@(db|files).tar)     TAR_OPT="" ;;
    *) error "$(gettext "'%s' does not have a valid archive extension.")" \
        "$repofile"
      exit 1 ;;
  esac

  printf '%s' "$TAR_OPT"
}

# write an entry to the pacman database
#   arg1 - path to package
db_write_entry() {
  # blank out all variables
  local pkgfile="$1"
  local -a _groups _licenses _replaces _depends _conflicts _provides _optdepends
  local pkgname pkgver pkgdesc csize size url arch builddate packager \
    md5sum sha256sum pgpsig pgpsigsize

  # read info from the zipped package
  local line var val
  while read -r line; do
    [[ ${line:0:1} = '#' ]] && continue
    IFS=' =' read -r var val < <(printf '%s\n' "$line")

    # normalize whitespace with an extglob
    declare "$var=${val//+([[:space:]])/ }"
    case "$var" in
      group)     _groups+=("$group") ;;
      license)   _licenses+=("$license") ;;
      replaces)  _replaces+=("$replaces") ;;
      depend)    _depends+=("$depend") ;;
      conflict)  _conflicts+=("$conflict") ;;
      provides)  _provides+=("$provides") ;;
      optdepend) _optdepends+=("$optdepend") ;;
    esac
  done< <(bsdtar -xOqf "$pkgfile" .PKGINFO)

  # ensure $pkgname and $pkgver variables were found
  if [[ -z $pkgname || -z $pkgver ]]; then
    error "$(gettext "Invalid package file '%s'.")" "$pkgfile"
    return 1
  fi

  if [[ -d $tmpdir/tree/$pkgname-$pkgver ]]; then
    warning "$(gettext "An entry for '%s' already existed")" "$pkgname-$pkgver"
  else
    if (( DELTA )); then
      pkgentry=$(find_pkgentry $pkgname)
      if [[ -n $pkgentry ]]; then
        local oldfilename=$(grep -A1 FILENAME $pkgentry/desc | tail -n1)
        local oldfile="$(dirname $1)/$oldfilename"
      fi
    fi
  fi

  # compute base64'd PGP signature
  if [[ -f "$pkgfile.sig" ]]; then
    pgpsigsize=$(@SIZECMD@ -L "$pkgfile.sig")
    if (( pgpsigsize > 16384 )); then
      error "$(gettext "Invalid package signature file '%s'.")" "$pkgfile.sig"
      return 1
    fi
    msg2 "$(gettext "Adding package signature...")"
    pgpsig=$(openssl base64 -in "$pkgfile.sig" | tr -d '\n')
  fi

  csize=$(@SIZECMD@ -L "$pkgfile")

  # compute checksums
  msg2 "$(gettext "Computing checksums...")"
  md5sum="$(openssl dgst -md5 "$pkgfile")"
  md5sum="${md5sum##* }"
  sha256sum="$(openssl dgst -sha256 "$pkgfile")"
  sha256sum="${sha256sum##* }"

  # remove an existing entry if it exists, ignore failures
  db_remove_entry "$pkgname"

  # create package directory
  pushd "$tmpdir/tree" >/dev/null
  mkdir "$pkgname-$pkgver"
  pushd "$pkgname-$pkgver" >/dev/null

  # restore an eventual deltas file
  [[ -f ../$pkgname.deltas ]] && mv "../$pkgname.deltas" deltas

  # create desc entry
  msg2 "$(gettext "Creating '%s' db entry...")" 'desc'
  {
    format_entry "FILENAME"  "${1##*/}"
    format_entry "NAME"      "$pkgname"
    format_entry "BASE"      "$pkgbase"
    format_entry "VERSION"   "$pkgver"
    format_entry "DESC"      "$pkgdesc"
    format_entry "GROUPS"    "${_groups[@]}"
    format_entry "CSIZE"     "$csize"
    format_entry "ISIZE"     "$size"

    # add checksums
    format_entry "MD5SUM"    "$md5sum"
    format_entry "SHA256SUM" "$sha256sum"

    # add PGP sig
    format_entry "PGPSIG"    "$pgpsig"

    format_entry "URL"       "$url"
    format_entry "LICENSE"   "${_licenses[@]}"
    format_entry "ARCH"      "$arch"
    format_entry "BUILDDATE" "$builddate"
    format_entry "PACKAGER"  "$packager"
    format_entry "REPLACES"  "${_replaces[@]}"
  } >'desc'

  # create depends entry
  msg2 "$(gettext "Creating '%s' db entry...")" 'depends'
  {
    format_entry "DEPENDS"    "${_depends[@]}"
    format_entry "CONFLICTS"  "${_conflicts[@]}"
    format_entry "PROVIDES"   "${_provides[@]}"
    format_entry "OPTDEPENDS" "${_optdepends[@]}"
  } >'depends'

  popd >/dev/null
  popd >/dev/null

  # create files file if wanted
  if (( WITHFILES )); then
    msg2 "$(gettext "Creating '%s' db entry...")" 'files'
    local files_path="$tmpdir/tree/$pkgname-$pkgver/files"
    echo "%FILES%" >$files_path
    bsdtar --exclude='^.*' -tf "$pkgfile" >>$files_path
  fi

  # create a delta file
  if (( DELTA )); then
    if [[ -n $oldfilename ]]; then
      if [[ -f $oldfile ]]; then
        delta=$(pkgdelta -q $oldfile $1)
        if [[ -f $delta ]]; then
          db_write_delta $delta
        fi
      else
        warning "$(gettext "Old package file not found: %s")" "$oldfilename"
      fi
    fi
  fi

  return 0
} # end db_write_entry

# remove existing entries from the DB
#   arg1 - package name
db_remove_entry() {
  local pkgname=$1
  local notfound=1
  local pkgentry=$(find_pkgentry $pkgname)
  while [[ -n $pkgentry ]]; do
    notfound=0
    if [[ -f $pkgentry/deltas ]]; then
      mv "$pkgentry/deltas" "$tmpdir/tree/$pkgname.deltas"
    fi
    msg2 "$(gettext "Removing existing entry '%s'...")" \
    "${pkgentry##*/}"
    rm -rf $pkgentry
    pkgentry=$(find_pkgentry $pkgname)
  done
  return $notfound
} # end db_remove_entry

elephant() {
  case $(( RANDOM % 2 )) in
    0) printf '%s\n' "H4sIAL3qBE4CAyWLwQ3AMAgD/0xh5UPzYiFUMgjq7LUJsk7yIQNAQTAikFUDnqkr" \
                     "OQFOUm0Wd9pHCi13ONjBpVdqcWx+EdXVX4vXvGv5cgztB9+fJxZ7AAAA"
    ;;

    1) printf '%s\n' "H4sIAJVWBU4CA21RMQ7DIBDbeYWrDgQJ7rZ+IA/IB05l69alcx5fc0ASVXUk4jOO" \
                     "7yAAUWtorygwJ4hlMii0YkJKKRKGvsMsiykl1SalvrMD1gUXyXRkGZPx5OPft81K" \
                     "tNAiAjyGjYO47h1JjizPkJrCWbK/4C+uLkT7bzpGc7CT9bmOzNSW5WLSO5vexjmH" \
                     "ZL9JFFZeAa0a2+lKjL2anpYfV+0Zx9LJ+/MC8nRayuDlSNy2rfAPibOzsiWHL0jL" \
                     "SsjFAQAA"
    ;;
  esac | openssl base64 -d | gzip -d
}

check_repo_db() {
  local repodir

  # ensure the path to the DB exists; $LOCKFILE is always an absolute path
  repodir=${LOCKFILE%/*}/

  if [[ ! -d "$repodir" ]]; then
    error "$(gettext "%s does not exist or is not a directory.")" "$repodir"
    exit 1
  fi

  # check lock file
  if ( set -o noclobber; echo "$$" > "$LOCKFILE") 2> /dev/null; then
    CLEAN_LOCK=1
  else
    error "$(gettext "Failed to acquire lockfile: %s.")" "$LOCKFILE"
    [[ -f $LOCKFILE ]] && error "$(gettext "Held by process %s")" "$(cat $LOCKFILE)"
    exit 1
  fi

  if [[ -f $REPO_DB_FILE ]]; then
    # there are two situations we can have here- a DB with some entries,
    # or a DB with no contents at all.
    if ! bsdtar -tqf "$REPO_DB_FILE" '*/desc' >/dev/null 2>&1; then
      # check empty case
      if [[ -n $(bsdtar -tqf "$REPO_DB_FILE" '*' 2>/dev/null) ]]; then
        error "$(gettext "Repository file '%s' is not a proper pacman database.")" "$REPO_DB_FILE"
        exit 1
      fi
    fi
    verify_signature "$REPO_DB_FILE"
    msg "$(gettext "Extracting database to a temporary location...")"
    bsdtar -xf "$REPO_DB_FILE" -C "$tmpdir/tree"
  else
    case "$cmd" in
      repo-remove)
      error "$(gettext "Repository file '%s' was not found.")" "$REPO_DB_FILE"
      exit 1
      ;;
      repo-add)
      # check if the file can be created (write permission, directory existence, etc)
      if ! touch "$REPO_DB_FILE"; then
        error "$(gettext "Repository file '%s' could not be created.")" "$REPO_DB_FILE"
        exit 1
      fi
      rm -f "$REPO_DB_FILE"
      ;;
    esac
  fi
}

add() {
  if [[ ! -f $1 ]]; then
    error "$(gettext "File '%s' not found.")" "$1"
    return 1
  fi

  if [[ ${1##*.} == "delta" ]]; then
    deltafile=$1
    msg "$(gettext "Adding delta '%s'")" "$deltafile"
    if ! type xdelta3 &>/dev/null; then
      error "$(gettext "Cannot find the xdelta3 binary! Is xdelta3 installed?")"
      exit 1
    fi
    if db_write_delta "$deltafile"; then
      return 0
    else
      return 1
    fi
  fi

  pkgfile=$1
  if ! bsdtar -tqf "$pkgfile" .PKGINFO >/dev/null 2>&1; then
    error "$(gettext "'%s' is not a package file, skipping")" "$pkgfile"
    return 1
  fi

  msg "$(gettext "Adding package '%s'")" "$pkgfile"

  db_write_entry "$pkgfile"
}

remove() {
  if [[ ${1##*.} == "delta" ]]; then
    deltafile=$1
    msg "$(gettext "Searching for delta '%s'...")" "$deltafile"
    if db_remove_delta "$deltafile"; then
      return 0
    else
      error "$(gettext "Delta matching '%s' not found.")" "$deltafile"
      return 1
    fi
  fi

  pkgname=$1
  msg "$(gettext "Searching for package '%s'...")" "$pkgname"

  if db_remove_entry "$pkgname"; then
    rm -f "$tmpdir/tree/$pkgname.deltas"
    return 0
  else
    error "$(gettext "Package matching '%s' not found.")" "$pkgname"
    return 1
  fi
}

trap_exit() {
  # unhook all traps to avoid race conditions
  trap '' EXIT TERM HUP QUIT INT ERR

  echo
  error "$@"
  clean_up 1
}

clean_up() {
  local exit_code=${1:-$?}

  # unhook all traps to avoid race conditions
  trap '' EXIT TERM HUP QUIT INT ERR

  [[ -d $tmpdir ]] && rm -rf "$tmpdir"
  (( CLEAN_LOCK )) && [[ -f $LOCKFILE ]] && rm -f "$LOCKFILE"

  exit $exit_code
}

# PROGRAM START

# determine whether we have gettext; make it a no-op if we do not
if ! type gettext &>/dev/null; then
  gettext() {
    echo "$@"
  }
fi

case "$1" in
  -h|--help) usage; exit 0;;
  -V|--version) version; exit 0;;
esac

# figure out what program we are
cmd=${0##*/}
if [[ $cmd == "repo-elephant" ]]; then
  elephant
  exit 0
fi

if [[ $cmd != "repo-add" && $cmd != "repo-remove" ]]; then
  error "$(gettext "Invalid command name '%s' specified.")" "$cmd"
  exit 1
fi

tmpdir=$(mktemp -d "${TMPDIR:-/tmp}/repo-tools.XXXXXXXXXX") || (\
  error "$(gettext "Cannot create temp directory for database building.")"; \
  exit 1)
mkdir $tmpdir/tree

trap 'clean_up' EXIT
for signal in TERM HUP QUIT; do
  trap "trap_exit \"$(gettext "%s signal caught. Exiting...")\" \"$signal\"" "$signal"
done
trap 'trap_exit "$(gettext "Aborted by user! Exiting...")"' INT
trap 'trap_exit "$(gettext "An unknown error has occurred. Exiting...")"' ERR

declare -a args
success=0
# parse arguments
while (( $# )); do
  case "$1" in
    -q|--quiet) QUIET=1;;
    -d|--delta) DELTA=1;;
    -f|--files) WITHFILES=1;;
    -s|--sign)
      check_gpg
      SIGN=1
      if ! gpg --list-key ${GPGKEY} &>/dev/null; then
        if [[ ! -z $GPGKEY ]]; then
          error "$(gettext "The key ${GPGKEY} does not exist in your keyring.")"
        else
          error "$(gettext "There is no key in your keyring.")"
        fi
        exit 1
      fi
      ;;
    -k|--key)
      check_gpg
      shift
      GPGKEY="$1"
      if ! gpg --list-key ${GPGKEY} &>/dev/null; then
        error "$(gettext "The key ${GPGKEY} does not exist in your keyring.")"
        exit 1
      fi
      ;;
    -v|--verify)
      check_gpg
      VERIFY=1
      ;;
    *)
      args+=("$1")
      ;;
  esac
  shift
done

REPO_DB_FILE=${args[0]}
if [[ -z $REPO_DB_FILE ]]; then
  usage
  exit 1
fi

if [[ $REPO_DB_FILE == /* ]]; then
  LOCKFILE=$REPO_DB_FILE.lck
else
  LOCKFILE=$PWD/$REPO_DB_FILE.lck
fi

verify_repo_extension "$REPO_DB_FILE" >/dev/null
check_repo_db

for arg in "${args[@]:1}"; do
  case "$cmd" in
    repo-add) add "$arg" ;;
    repo-remove) remove "$arg" ;;
  esac && success=1
done

# if at least one operation was a success, re-zip database
if (( success )); then
  msg "$(gettext "Creating updated database file '%s'")" "$REPO_DB_FILE"

  TAR_OPT=$(verify_repo_extension "$REPO_DB_FILE")
  # $LOCKFILE is already guaranteed to be absolute so this is safe
  dirname=${LOCKFILE%/*}
  filename=${REPO_DB_FILE##*/}
  # this ensures we create it on the same filesystem, making moves atomic
  tempname="$dirname/.tmp.$filename"

  pushd "$tmpdir/tree" >/dev/null
  if ( shopt -s nullglob; files=(*); (( ${#files[*]} )) ); then
    bsdtar -c${TAR_OPT}f "$tempname" *
  else
    # we have no packages remaining? zip up some emptyness
    warning "$(gettext "No packages remain, creating empty database.")"
    bsdtar -c${TAR_OPT}f "$tempname" -T /dev/null
  fi
  popd >/dev/null

  create_signature "$tempname"

  # hardlink or move the previous version of the database and signature to .old
  # extension as a backup measure
  if [[ -f $REPO_DB_FILE ]]; then
    ln -f "$REPO_DB_FILE" "$REPO_DB_FILE.old" 2>/dev/null || \
      mv -f "$REPO_DB_FILE" "$REPO_DB_FILE.old"
  fi
  if [[ -f $REPO_DB_FILE.sig ]]; then
    ln -f "$REPO_DB_FILE.sig" "$REPO_DB_FILE.old.sig" 2>/dev/null || \
      mv -f "$REPO_DB_FILE.sig" "$REPO_DB_FILE.old.sig"
  else
    rm -f "$REPO_DB_FILE.old.sig"
  fi

  # rotate the newly-created database and signature into place
  mv "$tempname" "$REPO_DB_FILE"
  if [[ -f $tempname.sig ]]; then
    mv "$tempname.sig" "$REPO_DB_FILE.sig"
  fi

  dblink="${REPO_DB_FILE%.tar*}"
  rm -f "$dblink" "$dblink.sig"
  ln -s "$filename" "$dblink" 2>/dev/null || \
    ln "$filename" "$dblink" 2>/dev/null || \
    cp "$REPO_DB_FILE" "$dblink"
  if [[ -f "$REPO_DB_FILE.sig" ]]; then
    ln -s "$filename.sig" "$dblink.sig" 2>/dev/null || \
      ln "$filename.sig" "$dblink.sig" 2>/dev/null || \
      cp "$REPO_DB_FILE.sig" "$dblink.sig"
  fi
else
  msg "$(gettext "No packages modified, nothing to do.")"
  exit 1
fi

exit 0
# vim: set ts=2 sw=2 noet: