regress/cmdline/backout.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2019 Stefan Sperling <stsp@openbsd.org>
   4 #
   5 # Permission to use, copy, modify, and distribute this software for any
   6 # purpose with or without fee is hereby granted, provided that the above
   7 # copyright notice and this permission notice appear in all copies.
   8 #
   9 # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10 # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11 # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12 # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13 # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14 # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16
  17 . ./common.sh
  18
  19 test_backout_basic() {
  20         local testroot=`test_init backout_basic`
  21
  22         got checkout $testroot/repo $testroot/wt > /dev/null
  23         ret=$?
  24         if [ $ret -ne 0 ]; then
  25                 test_done "$testroot" "$ret"
  26                 return 1
  27         fi
  28
  29         echo "new" > $testroot/wt/new
  30         (cd $testroot/wt && got add new > /dev/null)
  31         echo "modified alpha" > $testroot/wt/alpha
  32         (cd $testroot/wt && got rm epsilon/zeta > /dev/null)
  33         (cd $testroot/wt && got commit -m "bad changes" > /dev/null)
  34
  35         local bad_commit=`git_show_head $testroot/repo`
  36
  37
  38         (cd $testroot/wt && got update > /dev/null)
  39
  40         echo "modified beta" > $testroot/wt/beta
  41         (cd $testroot/wt && got commit -m "changing beta" > /dev/null)
  42
  43         (cd $testroot/wt && got update > /dev/null)
  44
  45         (cd $testroot/wt && got backout $bad_commit > $testroot/stdout)
  46
  47         echo "G  alpha" > $testroot/stdout.expected
  48         echo "A  epsilon/zeta" >> $testroot/stdout.expected
  49         echo "D  new" >> $testroot/stdout.expected
  50         echo "Backed out commit $bad_commit" >> $testroot/stdout.expected
  51         cmp -s $testroot/stdout.expected $testroot/stdout
  52         ret=$?
  53         if [ $ret -ne 0 ]; then
  54                 diff -u $testroot/stdout.expected $testroot/stdout
  55                 test_done "$testroot" "$ret"
  56                 return 1
  57         fi
  58
  59         echo "alpha" > $testroot/content.expected
  60         cat $testroot/wt/alpha > $testroot/content
  61         cmp -s $testroot/content.expected $testroot/content
  62         ret=$?
  63         if [ $ret -ne 0 ]; then
  64                 diff -u $testroot/content.expected $testroot/content
  65                 test_done "$testroot" "$ret"
  66                 return 1
  67         fi
  68
  69         if [ -e "$testroot/wt/new" ]; then
  70                 echo "file '$testroot/wt/new' still exists on disk" >&2
  71                 test_done "$testroot" "$ret"
  72                 return 1
  73         fi
  74
  75         if [ ! -e "$testroot/wt/epsilon/zeta" ]; then
  76                 echo "file '$testroot/wt/epsilon/zeta' is missing on disk" >&2
  77                 test_done "$testroot" "$ret"
  78                 return 1
  79         fi
  80
  81         echo 'M  alpha' > $testroot/stdout.expected
  82         echo 'A  epsilon/zeta' >> $testroot/stdout.expected
  83         echo 'D  new' >> $testroot/stdout.expected
  84         (cd $testroot/wt && got status > $testroot/stdout)
  85         cmp -s $testroot/stdout.expected $testroot/stdout
  86         ret=$?
  87         if [ $ret -ne 0 ]; then
  88                 diff -u $testroot/stdout.expected $testroot/stdout
  89         fi
  90         test_done "$testroot" "$ret"
  91 }
  92
  93 test_backout_edits_for_file_since_deleted() {
  94         local testroot=`test_init backout_edits_for_file_since_deleted`
  95
  96         got checkout $testroot/repo $testroot/wt > /dev/null
  97         ret=$?
  98         if [ $ret -ne 0 ]; then
  99                 test_done "$testroot" "$ret"
 100                 return 1
 101         fi
 102
 103         echo "modified alpha" > $testroot/wt/alpha
 104         (cd $testroot/wt && got commit -m "changing alpha" > /dev/null)
 105
 106         local bad_commit=`git_show_head $testroot/repo`
 107
 108
 109         (cd $testroot/wt && got update > /dev/null)
 110
 111         (cd $testroot/wt && got rm alpha > /dev/null)
 112         (cd $testroot/wt && got commit -m "removing alpha" > /dev/null)
 113
 114         (cd $testroot/wt && got update > /dev/null)
 115
 116         (cd $testroot/wt && got backout $bad_commit > $testroot/stdout)
 117
 118         echo "!  alpha" > $testroot/stdout.expected
 119         echo "Backed out commit $bad_commit" >> $testroot/stdout.expected
 120         echo -n "Files which had incoming changes but could not be found " \
 121                 >> $testroot/stdout.expected
 122         echo "in the work tree: 1" >> $testroot/stdout.expected
 123         cmp -s $testroot/stdout.expected $testroot/stdout
 124         ret=$?
 125         if [ $ret -ne 0 ]; then
 126                 diff -u $testroot/stdout.expected $testroot/stdout
 127                 test_done "$testroot" "$ret"
 128                 return 1
 129         fi
 130
 131         if [ -e "$testroot/wt/alpha" ]; then
 132                 echo "file '$testroot/wt/alpha' still exists on disk" >&2
 133                 test_done "$testroot" "$ret"
 134                 return 1
 135         fi
 136
 137         echo -n '' > $testroot/stdout.expected
 138         (cd $testroot/wt && got status > $testroot/stdout)
 139         cmp -s $testroot/stdout.expected $testroot/stdout
 140         ret=$?
 141         if [ $ret -ne 0 ]; then
 142                 diff -u $testroot/stdout.expected $testroot/stdout
 143         fi
 144         test_done "$testroot" "$ret"
 145 }
 146
 147 test_backout_next_commit() {
 148         local testroot=`test_init backout_next_commit`
 149         local commit0=`git_show_head $testroot/repo`
 150
 151         got checkout $testroot/repo $testroot/wt > /dev/null
 152         ret=$?
 153         if [ $ret -ne 0 ]; then
 154                 test_done "$testroot" "$ret"
 155                 return 1
 156         fi
 157
 158         echo "new" > $testroot/wt/new
 159         (cd $testroot/wt && got add new > /dev/null)
 160         echo "modified alpha" > $testroot/wt/alpha
 161         (cd $testroot/wt && got rm epsilon/zeta > /dev/null)
 162         (cd $testroot/wt && got commit -m "bad changes" > /dev/null)
 163
 164         local bad_commit=`git_show_head $testroot/repo`
 165
 166         (cd $testroot/wt && got update -c $commit0 > /dev/null)
 167
 168         (cd $testroot/wt && got backout $bad_commit > $testroot/stdout)
 169
 170         echo "G  alpha" > $testroot/stdout.expected
 171         echo "G  epsilon/zeta" >> $testroot/stdout.expected
 172         echo "!  new" >> $testroot/stdout.expected
 173         echo "Backed out commit $bad_commit" >> $testroot/stdout.expected
 174         echo -n "Files which had incoming changes but could not be found " \
 175                 >> $testroot/stdout.expected
 176         echo "in the work tree: 1" >> $testroot/stdout.expected
 177         cmp -s $testroot/stdout.expected $testroot/stdout
 178         ret=$?
 179         if [ $ret -ne 0 ]; then
 180                 diff -u $testroot/stdout.expected $testroot/stdout
 181                 test_done "$testroot" "$ret"
 182                 return 1
 183         fi
 184
 185         if [ -e "$testroot/wt/new" ]; then
 186                 echo "file '$testroot/wt/new' still exists on disk" >&2
 187                 test_done "$testroot" "$ret"
 188                 return 1
 189         fi
 190
 191         echo "zeta" > $testroot/content.expected
 192         cat $testroot/wt/epsilon/zeta > $testroot/content
 193         cmp -s $testroot/content.expected $testroot/content
 194         ret=$?
 195         if [ $ret -ne 0 ]; then
 196                 diff -u $testroot/content.expected $testroot/content
 197                 test_done "$testroot" "$ret"
 198                 return 1
 199         fi
 200
 201         echo -n '' > $testroot/stdout.expected
 202         (cd $testroot/wt && got status > $testroot/stdout)
 203         cmp -s $testroot/stdout.expected $testroot/stdout
 204         ret=$?
 205         if [ $ret -ne 0 ]; then
 206                 diff -u $testroot/stdout.expected $testroot/stdout
 207         fi
 208         test_done "$testroot" "$ret"
 209 }
 210
 211 test_backout_umask() {
 212         local testroot=`test_init backout_umask`
 213
 214         got checkout "$testroot/repo" "$testroot/wt" >/dev/null
 215         echo "edit alpha" >$testroot/wt/alpha
 216         (cd "$testroot/wt" && got commit -m 'edit alpha') >/dev/null
 217         ret=$?
 218         if [ $ret -ne 0 ]; then
 219                 test_done "$testroot" $ret
 220                 return 1
 221         fi
 222
 223         local commit=`git_show_head "$testroot/repo"`
 224
 225         (cd "$testroot/wt" && got update) >/dev/null
 226
 227         # using a subshell to avoid clobbering global umask
 228         (umask 077 && cd "$testroot/wt" && got backout $commit) >/dev/null
 229         ret=$?
 230         if [ $ret -ne 0 ]; then
 231                 test_done "$testroot" $ret
 232                 return 1
 233         fi
 234
 235         if ! ls -l "$testroot/wt/alpha" | grep -q ^-rw-------; then
 236                 echo "alpha is not 0600 after backout" >&2
 237                 ls -l "$testroot/wt/alpha" >&2
 238                 test_done "$testroot" $ret
 239                 return 1
 240         fi
 241
 242         test_done "$testroot" 0
 243 }
 244
 245 test_backout_logmsg_ref() {
 246         local testroot=`test_init backout_logmsg_ref`
 247
 248         got checkout $testroot/repo $testroot/wt > /dev/null
 249         ret=$?
 250         if [ $ret -ne 0 ]; then
 251                 test_done "$testroot" "$ret"
 252                 return 1
 253         fi
 254
 255         (cd $testroot/repo && git checkout -q -b newbranch)
 256
 257         echo "modified delta on branch" > $testroot/repo/gamma/delta
 258         echo "modified alpha on branch" > $testroot/repo/alpha
 259         (cd $testroot/repo && git rm -q beta)
 260         echo "new file on branch" > $testroot/repo/epsilon/new
 261         (cd $testroot/repo && git add epsilon/new)
 262
 263         git_commit $testroot/repo -m "commit changes on newbranch"
 264         local commit_time=`git_show_author_time $testroot/repo`
 265         local branch_rev=`git_show_head $testroot/repo`
 266
 267         echo "modified new file on branch" > $testroot/repo/epsilon/new
 268
 269         git_commit $testroot/repo -m "commit modified new file on newbranch"
 270         local commit_time2=`git_show_author_time $testroot/repo`
 271         local branch_rev2=`git_show_head $testroot/repo`
 272
 273         (cd $testroot/wt && got backout $branch_rev > /dev/null)
 274         (cd $testroot/wt && got backout $branch_rev2 > /dev/null)
 275
 276         # show all backout log message refs in the work tree
 277         local sep="-----------------------------------------------"
 278         local logmsg="commit changes on newbranch"
 279         local changeset=" M  alpha\n D  beta\n A  epsilon/new\n M  gamma/delta"
 280         local logmsg2="commit modified new file on newbranch"
 281         local changeset2=" M  epsilon/new"
 282         local date=`date -u -r $commit_time +"%a %b %e %X %Y UTC"`
 283         local date2=`date -u -r $commit_time2 +"%a %b %e %X %Y UTC"`
 284         local ymd=`date -u -r $commit_time +"%F"`
 285         local short_id=$(printf '%.7s' $branch_rev)
 286         local ymd2=`date -u -r $commit_time2 +"%F"`
 287         local short_id2="newbranch"
 288         local wt_sorted=$(printf "$branch_rev\n$branch_rev2" | sort)
 289
 290         for r in $wt_sorted; do
 291                 echo $sep >> $testroot/stdout.expected
 292                 if [ $r = $branch_rev ]; then
 293                         echo "backout $r" >> $testroot/stdout.expected
 294                         echo "from: $GOT_AUTHOR" >> $testroot/stdout.expected
 295                         echo "date: $date" >> $testroot/stdout.expected
 296                         printf " \n $logmsg\n \n" >> $testroot/stdout.expected
 297                         printf "$changeset\n\n" >> $testroot/stdout.expected
 298
 299                         # for forthcoming wt 'backout -X' test
 300                         echo "Deleted: $ymd $short_id $logmsg" >> \
 301                             $testroot/stdout.wt_deleted
 302                 else
 303                         echo "backout $r (newbranch)" \
 304                             >> $testroot/stdout.expected
 305                         echo "from: $GOT_AUTHOR" >> $testroot/stdout.expected
 306                         echo "date: $date2" >> $testroot/stdout.expected
 307                         printf " \n $logmsg2\n \n" >> $testroot/stdout.expected
 308                         printf "$changeset2\n\n" >> $testroot/stdout.expected
 309
 310                         # for forthcoming wt 'backout -X' test
 311                         echo "Deleted: $ymd2 $short_id2 $logmsg2" >> \
 312                             $testroot/stdout.wt_deleted
 313                 fi
 314         done
 315
 316         (cd $testroot/wt && got backout -l > $testroot/stdout)
 317
 318         cmp -s $testroot/stdout.expected $testroot/stdout
 319         ret=$?
 320         if [ $ret -ne 0 ]; then
 321                 diff -u $testroot/stdout.expected $testroot/stdout
 322                 test_done "$testroot" "$ret"
 323                 return 1
 324         fi
 325
 326         # only show log message ref of the specified commit id
 327         echo $sep > $testroot/stdout.expected
 328         echo "backout $branch_rev" >> $testroot/stdout.expected
 329         echo "from: $GOT_AUTHOR" >> $testroot/stdout.expected
 330         echo "date: $date" >> $testroot/stdout.expected
 331         printf " \n $logmsg\n \n" >> $testroot/stdout.expected
 332         printf "$changeset\n\n" >> $testroot/stdout.expected
 333
 334         (cd $testroot/wt && got backout -l $branch_rev > $testroot/stdout)
 335
 336         cmp -s $testroot/stdout.expected $testroot/stdout
 337         ret=$?
 338         if [ $ret -ne 0 ]; then
 339                 diff -u $testroot/stdout.expected $testroot/stdout
 340                 test_done "$testroot" "$ret"
 341                 return 1
 342         fi
 343
 344         # only show log message ref of the specified symref
 345         echo $sep > $testroot/stdout.expected
 346         echo "backout $branch_rev2 (newbranch)" >> $testroot/stdout.expected
 347         echo "from: $GOT_AUTHOR" >> $testroot/stdout.expected
 348         echo "date: $date2" >> $testroot/stdout.expected
 349         printf " \n $logmsg2\n \n" >> $testroot/stdout.expected
 350         printf "$changeset2\n\n" >> $testroot/stdout.expected
 351
 352         (cd $testroot/wt && got backout -l "newbranch" > $testroot/stdout)
 353
 354         cmp -s $testroot/stdout.expected $testroot/stdout
 355         ret=$?
 356         if [ $ret -ne 0 ]; then
 357                 diff -u $testroot/stdout.expected $testroot/stdout
 358                 test_done "$testroot" "$ret"
 359                 return 1
 360         fi
 361
 362         # create a second work tree with backed-out commits and ensure
 363         # bo -l within the new work tree only shows the refs it created
 364         got checkout $testroot/repo $testroot/wt2 > /dev/null
 365         ret=$?
 366         if [ $ret -ne 0 ]; then
 367                 test_done "$testroot" "$ret"
 368                 return 1
 369         fi
 370
 371         (cd $testroot/repo && git checkout -q -b newbranch2)
 372
 373         echo "modified delta on branch2" > $testroot/repo/gamma/delta
 374         echo "modified alpha on branch2" > $testroot/repo/alpha
 375         echo "new file on branch2" > $testroot/repo/epsilon/new2
 376         (cd $testroot/repo && git add epsilon/new2)
 377
 378         git_commit $testroot/repo -m "commit changes on newbranch2"
 379         local b2_commit_time=`git_show_author_time $testroot/repo`
 380         local branch2_rev=`git_show_head $testroot/repo`
 381
 382         echo "modified file new2 on branch2" > $testroot/repo/epsilon/new2
 383
 384         git_commit $testroot/repo -m "commit modified file new2 on newbranch2"
 385         local b2_commit_time2=`git_show_author_time $testroot/repo`
 386         local branch2_rev2=`git_show_head $testroot/repo`
 387
 388         (cd $testroot/wt2 && got backout $branch2_rev > /dev/null)
 389         (cd $testroot/wt2 && got backout $branch2_rev2 > /dev/null)
 390
 391         local b2_logmsg="commit changes on newbranch2"
 392         local b2_changeset=" M  alpha\n A  epsilon/new2\n M  gamma/delta"
 393         local b2_logmsg2="commit modified file new2 on newbranch2"
 394         local b2_changeset2=" M  epsilon/new2"
 395         date=`date -u -r $b2_commit_time +"%a %b %e %X %Y UTC"`
 396         date2=`date -u -r $b2_commit_time2 +"%a %b %e %X %Y UTC"`
 397         local wt2_sorted=$(printf "$branch2_rev\n$branch2_rev2" | sort)
 398
 399         echo -n > $testroot/stdout.expected
 400         for r in $wt2_sorted; do
 401                 echo $sep >> $testroot/stdout.expected
 402                 if [ $r = $branch2_rev ]; then
 403                         echo "backout $r" >> $testroot/stdout.expected
 404                         echo "from: $GOT_AUTHOR" >> $testroot/stdout.expected
 405                         echo "date: $date" >> $testroot/stdout.expected
 406                         printf " \n $b2_logmsg\n \n" >> \
 407                             $testroot/stdout.expected
 408                         printf "$b2_changeset\n\n" >> \
 409                             $testroot/stdout.expected
 410                 else
 411                         echo "backout $r (newbranch2)" \
 412                             >> $testroot/stdout.expected
 413                         echo "from: $GOT_AUTHOR" >> $testroot/stdout.expected
 414                         echo "date: $date2" >> $testroot/stdout.expected
 415                         printf " \n $b2_logmsg2\n \n" >> \
 416                             $testroot/stdout.expected
 417                         printf "$b2_changeset2\n\n" >> \
 418                             $testroot/stdout.expected
 419                 fi
 420         done
 421
 422         (cd $testroot/wt2 && got backout -l > $testroot/stdout)
 423
 424         cmp -s $testroot/stdout.expected $testroot/stdout
 425         ret=$?
 426         if [ $ret -ne 0 ]; then
 427                 diff -u $testroot/stdout.expected $testroot/stdout
 428                 test_done "$testroot" "$ret"
 429                 return 1
 430         fi
 431
 432         # ensure both wt and wt2 logmsg refs can be retrieved and the
 433         # work tree UUID is displayed when listing refs from the repo
 434         local wt_uuid=$(cat $testroot/wt/.got/uuid)
 435         local wt2_uuid=$(cat $testroot/wt2/.got/uuid)
 436         local wt_first=`printf "$wt_uuid\n$wt2_uuid" | sort | head -1`
 437
 438         for r in $wt_sorted; do
 439                 echo -n "backout $r" >> $testroot/wt.list
 440                 if [ $r = $branch_rev2 ]; then
 441                         echo -n " (newbranch)" >> $testroot/wt.list
 442                 fi
 443                 echo >> $testroot/wt.list
 444                 echo "work tree: $wt_uuid" >> $testroot/wt.list
 445         done
 446
 447         for r in $wt2_sorted; do
 448                 echo -n "backout $r" >> $testroot/wt2.list
 449                 if [ $r = $branch2_rev2 ]; then
 450                         echo -n " (newbranch2)" >> $testroot/wt2.list
 451                 fi
 452                 echo >> $testroot/wt2.list
 453                 echo "work tree: $wt2_uuid" >> $testroot/wt2.list
 454         done
 455
 456         if [ $wt_uuid = $wt_first ]; then
 457                 mv $testroot/wt.list $testroot/stdout.expected
 458                 cat $testroot/wt2.list >> $testroot/stdout.expected
 459         else
 460                 mv $testroot/wt2.list $testroot/stdout.expected
 461                 cat $testroot/wt.list >> $testroot/stdout.expected
 462         fi
 463
 464         (cd $testroot/repo && got backout -l | egrep "^(backout|work)" \
 465             > $testroot/stdout)
 466
 467         cmp -s $testroot/stdout.expected $testroot/stdout
 468         ret=$?
 469         if [ $ret -ne 0 ]; then
 470                 diff -u $testroot/stdout.expected $testroot/stdout
 471                 test_done "$testroot" "$ret"
 472                 return 1
 473         fi
 474
 475         # delete logmsg ref of the specified commit in work tree 2
 476         ymd=`date -u -r $b2_commit_time +"%F"`
 477         short_id=$(printf '%.7s' $branch2_rev)
 478
 479         echo "Deleted: $ymd $short_id $b2_logmsg" > $testroot/stdout.expected
 480         (cd $testroot/wt2 && got backout -X $branch2_rev > $testroot/stdout)
 481
 482         cmp -s $testroot/stdout.expected $testroot/stdout
 483         ret=$?
 484         if [ $ret -ne 0 ]; then
 485                 diff -u $testroot/stdout.expected $testroot/stdout
 486                 test_done "$testroot" "$ret"
 487                 return 1
 488         fi
 489
 490         # delete all logmsg refs in work tree 1
 491         (cd $testroot && mv stdout.wt_deleted stdout.expected)
 492         (cd $testroot/wt && got backout -X > $testroot/stdout)
 493
 494         cmp -s $testroot/stdout.expected $testroot/stdout
 495         ret=$?
 496         if [ $ret -ne 0 ]; then
 497                 diff -u $testroot/stdout.expected $testroot/stdout
 498                 test_done "$testroot" "$ret"
 499                 return 1
 500         fi
 501
 502         # confirm all work tree 1 refs were deleted
 503         echo -n > $testroot/stdout.expected
 504         (cd $testroot/wt && got backout -l > $testroot/stdout)
 505
 506         cmp -s $testroot/stdout.expected $testroot/stdout
 507         ret=$?
 508         if [ $ret -ne 0 ]; then
 509                 diff -u $testroot/stdout.expected $testroot/stdout
 510                 test_done "$testroot" "$ret"
 511                 return 1
 512         fi
 513
 514         # make sure the remaining ref in work tree 2 was not also deleted
 515         echo $sep > $testroot/stdout.expected
 516         echo "backout $branch2_rev2 (newbranch2)" >> $testroot/stdout.expected
 517         echo "from: $GOT_AUTHOR" >> $testroot/stdout.expected
 518         echo "date: $date2" >> $testroot/stdout.expected
 519         printf " \n $b2_logmsg2\n \n" >> $testroot/stdout.expected
 520         printf "$b2_changeset2\n\n" >> $testroot/stdout.expected
 521
 522         (cd $testroot/wt2 && got backout -l > $testroot/stdout)
 523
 524         cmp -s $testroot/stdout.expected $testroot/stdout
 525         ret=$?
 526         if [ $ret -ne 0 ]; then
 527                 diff -u $testroot/stdout.expected $testroot/stdout
 528                 test_done "$testroot" "$ret"
 529                 return 1
 530         fi
 531
 532         # ensure we can delete work tree refs from the repository dir
 533         ymd=`date -u -r $b2_commit_time2 +"%F"`
 534         echo "Deleted: $ymd newbranch2 $b2_logmsg2" > $testroot/stdout.expected
 535         (cd $testroot/repo && got backout -X > $testroot/stdout)
 536
 537         cmp -s $testroot/stdout.expected $testroot/stdout
 538         ret=$?
 539         if [ $ret -ne 0 ]; then
 540                 diff -u $testroot/stdout.expected $testroot/stdout
 541         fi
 542
 543         test_done "$testroot" "$ret"
 544 }
 545
 546 test_parseargs "$@"
 547 run_test test_backout_basic
 548 run_test test_backout_edits_for_file_since_deleted
 549 run_test test_backout_next_commit
 550 run_test test_backout_umask
 551 run_test test_backout_logmsg_ref