guilt

   1 #!/bin/sh
   2 #
   3 # Copyright (c) Josef "Jeff" Sipek, 2006-2018
   4 #
   5
   6 GUILT_VERSION="0.37-rc1"
   7 GUILT_NAME="Irgendwann"
   8
   9 GUILT="$(basename "$0")"
  10
  11 # If the first argument is one of the below, display the man page instead of
  12 # the rather silly and mostly useless usage string
  13 case $1 in
  14         -h|--h|--he|--hel|--help)
  15         shift
  16         exec guilt help "$@"
  17         exit
  18         ;;
  19         -V|--ver|--versi|--versio|--version)
  20         echo "Guilt version $GUILT_VERSION"
  21         exit
  22         ;;
  23 esac
  24
  25 # we change directories ourselves
  26 SUBDIRECTORY_OK=1
  27
  28 . "$(git --exec-path)/git-sh-setup"
  29
  30 #
  31 # Shell library
  32 #
  33 usage()
  34 {
  35         echo "Usage: guilt $CMDNAME $USAGE" >&2
  36         exit 1
  37 }
  38
  39 # Print arguments, but no trailing newline.
  40 # (echo -n is a bashism, use printf instead)
  41 _disp()
  42 {
  43         printf "%s" "$*"
  44 }
  45
  46 # Print arguments.
  47 # (echo -E is a bashism, use printf instead)
  48 disp()
  49 {
  50         printf "%s\n" "$*"
  51 }
  52
  53 # Print arguments, processing backslash sequences.
  54 # (echo -e is a bashism, use printf instead)
  55 disp_e()
  56 {
  57         printf "%b\n" "$*"
  58 }
  59
  60 noerr()
  61 {
  62         "$@" 2>/dev/null
  63 }
  64
  65 silent()
  66 {
  67         "$@" >/dev/null 2>/dev/null
  68 }
  69
  70 ########
  71
  72 GUILT_PATH="$(dirname "$0")"
  73
  74 guilt_commands()
  75 {
  76         # GNU Find no longer accepts -perm +111, even though the rest
  77         # world (MacOS, Solaris, BSD, etc.) does.  Sigh.  Using -executable
  78         # is arugably better, but it is a GNU extension.  Since this isn't
  79         # a fast path and guilt doesn't use autoconf, test for it as needed.
  80         if find . -maxdepth 0 -executable > /dev/null 2>&1 ; then
  81                 exe_test="-executable"
  82         else
  83                 exe_test="-perm +111"
  84         fi
  85         find "$GUILT_PATH/../lib/guilt" -maxdepth 1 -name "guilt-*" -type f $exe_test 2> /dev/null | sed -e "s/.*\\/$GUILT-//"
  86         find "$GUILT_PATH" -maxdepth 1 -name "guilt-*" -type f $exe_test | sed -e "s/.*\\/$GUILT-//"
  87 }
  88
  89 # by default, we shouldn't fail
  90 cmd=
  91
  92 if [ $# -ne 0 ]; then
  93         # take first arg, and try to execute it
  94
  95         arg="$1"
  96         dir="$GUILT_PATH"
  97         libdir="$GUILT_PATH/../lib/guilt"
  98
  99         if [ -x "$dir/guilt-$arg" ]; then
 100                 cmd="$dir/guilt-$arg"
 101                 CMDNAME=$arg
 102         elif [ -x "$libdir/guilt-$arg" ]; then
 103                 cmd="$libdir/guilt-$arg"
 104                 CMDNAME=$arg
 105         else
 106                 # might be a short handed
 107                 for command in $(guilt_commands); do
 108                         case $command in
 109                         $arg*)
 110                                 if [ -x "$dir/guilt-$command" ]; then
 111                                         cmd="$dir/guilt-$command"
 112                                         CMDNAME=$command
 113                                 elif [ -x "$libdir/guilt-$command" ]; then
 114                                         cmd="$libdir/guilt-$command"
 115                                         CMDNAME=$command
 116                                 fi
 117                                 ;;
 118                         esac
 119                 done
 120         fi
 121         if [ -z "$cmd" ]; then
 122                 disp "Command $arg not found" >&2
 123                 disp "" >&2
 124                 exit 1
 125         fi
 126         set_reflog_action "guilt-$CMDNAME"
 127
 128         shift
 129 else
 130         # no args passed or invalid command entered, just output help summary
 131
 132         disp "Guilt v$GUILT_VERSION"
 133         disp ""
 134         disp "Pick a command:"
 135         guilt_commands | sort | column | column -t | sed -e 's/^/       /'
 136
 137         disp ""
 138         disp "Example:"
 139         disp_e "\tguilt push"
 140
 141         # now, let's exit
 142         exit 1
 143 fi
 144
 145 ########
 146
 147 #
 148 # Library goodies
 149 #
 150
 151 # usage: valid_patchname <patchname>
 152 valid_patchname()
 153 {
 154         # Once we only support Git 1.7.8 and newer, the command below
 155         # could be replaced with:
 156         #
 157         #     git check-ref-format --allow-onelevel "$1"
 158         #
 159         # Instead, we arbitrarily prepend one level.  The result
 160         # should be the same, and this is portable to all existing
 161         # versions of Git.
 162         git check-ref-format a/"$1"
 163         if [ $? -ne 0 ]; then
 164                 return 1
 165         fi
 166
 167         # We want to reject all names that Git 2.0.0 rejects.  In case
 168         # we are running an older version, we explicitly check some
 169         # cases that were added to Git after version 1.5.0.  This code
 170         # aims to support Git version 1.5.0 and newer.
 171
 172         # Git 1.7.6.4 and newer rejects the DEL character.
 173         if [ `echo "$1"|tr -d '\177'` != "$1" ]; then
 174                 return 1
 175         fi
 176
 177         # Git 1.7.8 and newer rejects refs that start or end with
 178         # slash or contain multiple adjacent slashes.
 179         case "$1" in
 180                 /*|*/|*//*)
 181                         return 1;;
 182         esac
 183
 184         # Git 1.7.8 and newer rejects refname components that end in
 185         # .lock.
 186         case "$1" in
 187                 *.lock/*|*.lock)
 188                         return 1;;
 189         esac
 190
 191         # Git 1.8.5 and newer rejects refnames that are made up of the
 192         # single character "@".
 193         if [ "$1" = "@" ]; then
 194                 return 1
 195         fi
 196
 197         return 0
 198 }
 199
 200 get_branch()
 201 {
 202         silent git symbolic-ref HEAD || \
 203                 die "Working on a detached HEAD is unsupported."
 204
 205         git symbolic-ref HEAD | sed -e 's,^refs/heads/,,'
 206 }
 207
 208 verify_branch()
 209 {
 210         [ ! -d "$GIT_DIR/patches" ] &&
 211                 die "Patches directory doesn't exist, try guilt init"
 212         [ ! -d "$GIT_DIR/patches/$branch" ] &&
 213                 die "Branch $branch is not initialized, try guilt init"
 214         [ ! -f "$GIT_DIR/patches/$branch/series" ] &&
 215                 die "Branch $branch does not have a series file"
 216         [ ! -f "$GIT_DIR/patches/$branch/status" ] &&
 217                 die "Branch $branch does not have a status file"
 218         [ -f "$GIT_DIR/patches/$branch/applied" ] &&
 219                 die "Warning: Branch $branch has 'applied' file - guilt is not compatible with stgit"
 220 }
 221
 222 get_top()
 223 {
 224         tail -n 1 "$GUILT_DIR/$branch/status"
 225 }
 226
 227 get_prev()
 228 {
 229         if [ `wc -l < "$GUILT_DIR/$branch/status"` -gt 1 ]; then
 230                 tail -n 2 "$GUILT_DIR/$branch/status" | head_n 1
 231         fi
 232 }
 233
 234 get_full_series()
 235 {
 236         # ignore all lines matching:
 237         #       - empty lines
 238         #       - whitespace only
 239         #       - optional whitespace followed by '#' followed by more
 240         #         optional whitespace
 241         # also remove comments from end of lines
 242         sed -n -e "/^[[:space:]]*\(#.*\)*\$/ ! {
 243                 s/[[:space:]]*#.*\$//
 244
 245                 p
 246                 }
 247                 " "$series"
 248 }
 249
 250 get_series()
 251 {
 252         get_full_series | while read p; do
 253                 check_guards "$p" && echo "$p"
 254         done
 255 }
 256
 257 # usage: check_guards <patch>
 258 # Returns 0 if the patch should be pushed
 259 check_guards()
 260 {
 261         get_guards "$1" | while read guard; do
 262                 g=`echo $guard | sed "s/^[+-]//"`
 263                 case "$guard" in
 264                         +*)
 265                                 # Push +guard *only if* guard selected
 266                                 silent grep -F "$g" "$guards_file" || return 1
 267                                 ;;
 268                         -*)
 269                                 # Push -guard *unless* guard selected
 270                                 silent grep -F "$g" "$guards_file" && return 1
 271                                 true
 272                                 ;;
 273                 esac
 274         done
 275
 276         # propagate return from subshell
 277         return $?
 278 }
 279
 280 # usage: get_guards <patch>
 281 get_guards()
 282 {
 283         awk -v pname="$1" '
 284 ($1 == pname) {
 285         guards = "";
 286
 287         for(i=2; i<=NF; i++) {
 288                 sub(/#[^+-]*/, "", $i);
 289                 if (length($i)) {
 290                         if (length(guards))
 291                                 guards = guards " " $i;
 292                         else
 293                                 guards = $i;
 294                 }
 295         }
 296
 297         print guards;
 298 }' < "$series"
 299 }
 300
 301 # usage: set_guards <patch> <guards...>
 302 set_guards()
 303 {
 304         (
 305                 p="$1"
 306                 shift
 307                 for x in "$@"; do
 308                         case "$x" in
 309                                 [+-]*)
 310                                         awk -v pname="$p" -v newguard="$x" '{
 311 if ($1 == pname)
 312         print $0 " #" newguard;
 313 else
 314         print $0;
 315 }' < "$series" > "$series.tmp"
 316                                         mv "$series.tmp" "$series"
 317                                         ;;
 318                                 *)
 319                                         echo "'$x' is not a valid guard name" >&2
 320                                         ;;
 321                         esac
 322                 done
 323         )
 324 }
 325
 326 # usage: unset_guards <patch> <guards...>
 327 unset_guards()
 328 {
 329         (
 330                 p="$1"
 331                 shift
 332                 for x in "$@"; do
 333                         awk -v pname="$p" -v oldguard="$x" '{
 334 if ($1 == pname) {
 335         guards = "";
 336
 337         for(i=2; i<=NF; i++) {
 338                 if ($i == "#" oldguard)
 339                         continue;
 340
 341                 if (length(guards))
 342                         guards = guards " " $i;
 343                 else
 344                         guards = $i;
 345         }
 346
 347         if (length(guards))
 348                 print $1 " " guards;
 349         else
 350                 print $1;
 351 } else
 352         print $0;
 353 }' < "$series" > "$series.tmp"
 354                         mv "$series.tmp" "$series"
 355                 done
 356         )
 357 }
 358
 359 # usage: do_make_header <hash>
 360 do_make_header()
 361 {
 362         # we should try to work with commit objects only
 363         if [ `git cat-file -t "$1"` != "commit" ]; then
 364                 disp "Hash $1 is not a commit object" >&2
 365                 disp "Aborting..." >&2
 366                 exit 2
 367         fi
 368
 369         git cat-file -p "$1" | awk '
 370                 BEGIN{headers=1; firstline=1}
 371                 /^author / && headers {
 372                         sub(/^author +/, "");
 373                         authordate=strftime("%c", $(NF -1)) " " $NF;
 374                         sub(/ [0-9]* [+-]*[0-9][0-9]*$/, "");
 375                         author=$0
 376                 }
 377                 !headers {
 378                         print
 379                         if (firstline) {
 380                                 firstline = 0;
 381                                 print "\nFrom: " author;
 382                                 print "Date: " authordate;
 383                         }
 384                 }
 385                 /^$/ && headers { headers = 0 }
 386         '
 387 }
 388
 389 # usage: do_get_patch patchfile
 390 do_get_patch()
 391 {
 392         awk '
 393 BEGIN{}
 394 /^(diff |--- )/ {patch = 1}
 395 patch == 1 {print $0}
 396 END{}
 397 ' < "$1"
 398 }
 399
 400 # usage: do_get_header patchfile
 401 do_get_header()
 402 {
 403         # The complexity arises from the fact that we want to ignore all but the
 404         # Subject line of the header, and any empty lines after it, if these
 405         # exist, and inject only the Subject line as the first line of the
 406         # commit message.
 407         #
 408         # We also need to strip "from:" lines from the body of the patch
 409         # description as these are used by people to manually set the author of
 410         # the patch to be different to their local email address and failing to
 411         # strip them results in duplicate from: lines in output from guilt
 412         # patchbomb.
 413
 414         # 1st line prints first encountered Subject line plus empty line.
 415         # 2nd line skips standard email/git patch header lines.
 416         # 3th line skips "from:" lines throughout the patch description
 417         # 4rd line skips tip's additional header lines.
 418         # 5th line skips any empty lines thereafter.
 419         # 6th line turns off empty line skip upon seeing a non-empty line.
 420         # 7th line terminates execution when we encounter the diff
 421         awk '
 422 BEGIN{body=0; subj=0}
 423 /^Subject:/ && (body == 0 && subj == 0){subj=1; print substr($0, 10) "\n"; next}
 424 /^(Subject:|Author:|Date:|commit)/ && (body == 0){next}
 425 /^From:/ {body=0; next}
 426 /^(Commit-ID:|Gitweb:|AuthorDate:|Committer:CommitDate:)/ && (body == 0){next}
 427 /^[ \t\f\n\r\v]*$/ && (body==0){next}
 428 /^.*$/ && (body==0){body=1}
 429 /^(diff |---$|--- )/{exit}
 430 {print $0}
 431 END{}
 432 ' < "$1"
 433 }
 434
 435 # usage: do_get_full_header patchfile
 436 do_get_full_header()
 437 {
 438         # 2nd line checks for the begining of a patch
 439         # 3rd line outputs the line if it didn't get pruned by the above rules
 440         awk '
 441 BEGIN{}
 442 /^(diff |---$|--- )/{exit}
 443 {print $0}
 444 END{}
 445 ' < "$1"
 446 }
 447
 448 # usage: assert_head_check
 449 assert_head_check()
 450 {
 451         if ! head_check refs/patches/$branch/`get_top`; then
 452                 die "aborting..."
 453         fi
 454 }
 455
 456 # usage: head_check <expected hash>
 457 head_check()
 458 {
 459         # make sure we're not doing funky things to commits that don't
 460         # belong to us
 461
 462         case "$1" in
 463                 '')
 464                         # the expected hash is empty
 465                         return 0 ;;
 466                 refs/patches/$branch/)
 467                         # the expected hash is an invalid rev
 468                         return 0 ;;
 469         esac
 470
 471         if [ "`git rev-parse refs/heads/\`git_branch\``" != "`git rev-parse $1`" ]; then
 472                 disp "Expected HEAD commit $1" >&2
 473                 disp "                 got `git rev-parse refs/heads/\`git_branch\``" >&2
 474                 return 1
 475         fi
 476         return 0
 477 }
 478
 479 # usage: series_insert_patch <patchname>
 480 series_insert_patch()
 481 {
 482         awk -v top="`get_top`" -v new="$1" \
 483                 'BEGIN{if (top == "") print new;}
 484                 {
 485                         print $0;
 486                         if (top != "" && top == $0) print new;
 487                 }' "$series" > "$series.tmp"
 488         mv "$series.tmp" "$series"
 489 }
 490
 491 # usage: series_remove_patch <patchname>
 492 series_remove_patch()
 493 {
 494         grep -v "^$1\([[:space:]].*\)\?$" < "$series" > "$series.tmp"
 495         mv "$series.tmp" "$series"
 496 }
 497
 498 # usage: series_rename_patch <oldname> <newname>
 499 series_rename_patch()
 500 {
 501         # Rename the patch, but preserve comments on the line
 502         awk -v old="$1" -v new="$2" '
 503 {
 504         if (index($0, old) == 1)
 505                 print new substr($0, length(old) + 1);
 506         else
 507                 print $0;
 508 }' "$series" > "$series.tmp"
 509
 510         mv "$series.tmp" "$series"
 511 }
 512
 513 # usage: series_rename_patch <oldpatchname> <newpatchname>
 514 ref_rename_patch()
 515 {
 516         git update-ref "refs/patches/$branch/$2" `git rev-parse "refs/patches/$branch/$1"`
 517         remove_ref "refs/patches/$branch/$1"
 518 }
 519
 520 # Beware! This is one of the few (only?) places where we modify the applied
 521 # file directly
 522 #
 523 # usage: applied_rename_patch <oldname> <newname>
 524 applied_rename_patch()
 525 {
 526         awk -v old="$1" -v new="$2" \
 527                         'BEGIN{FS=":"}
 528                         { if ($0 == old)
 529                                 print new;
 530                         else
 531                                 print;
 532                         }' "$applied" > "$applied.tmp"
 533
 534         mv "$applied.tmp" "$applied"
 535 }
 536
 537 # usage: remove_patch_refs
 538 # reads patch names from stdin
 539 remove_patch_refs()
 540 {
 541         while read pname; do
 542                 remove_ref "refs/patches/$branch/$pname"
 543         done
 544 }
 545
 546 # usage: pop_many_patches <commitish> <number of patches>
 547 pop_many_patches()
 548 {
 549         assert_head_check
 550
 551         (
 552                 cd_to_toplevel
 553
 554                 # remove the patches refs
 555                 tail -n $2 < "$applied" | remove_patch_refs
 556
 557                 git reset --hard "$1" > /dev/null
 558
 559                 n=`wc -l < "$applied"`
 560                 n=`expr $n - $2`
 561                 head_n "$n" < "$applied" > "$applied.tmp"
 562                 mv "$applied.tmp" "$applied"
 563                 if [ -z "`get_top 2>/dev/null`" ] && [ "`git symbolic-ref HEAD`" = "refs/heads/$GUILT_PREFIX$branch" ] && ! $old_style_prefix
 564                 then
 565                         git symbolic-ref HEAD refs/heads/$branch
 566                         git update-ref -d refs/heads/$GUILT_PREFIX$branch
 567                 fi
 568         )
 569 }
 570
 571 # usage: pop_all_patches
 572 pop_all_patches()
 573 {
 574         pop_many_patches \
 575                 `git rev-parse refs/patches/$branch/$(head_n 1 "$applied")^` \
 576                 `wc -l < "$applied"`
 577 }
 578
 579 # usage: remove_ref <refname>
 580 remove_ref()
 581 {
 582         (
 583                 # does the ref exist?
 584                 r=`git show-ref --verify -s "$1" 2> /dev/null`
 585                 [ $? -ne 0 ] && exit 0
 586
 587                 # remove it
 588                 git update-ref -d "$1" "$r"
 589         )
 590 }
 591
 592 # usage: commit patchname parent
 593 commit()
 594 {
 595         (
 596                 TMP_MSG=`get_tmp_file msg`
 597
 598                 p="$GUILT_DIR/$branch/$1"
 599                 pname="$1"
 600                 cd_to_toplevel
 601
 602                 git diff-files --name-only | (while read n; do git update-index "$n" ; done)
 603
 604                 # grab a commit message out of the patch
 605                 do_get_header "$p" > "$TMP_MSG"
 606
 607                 # make a default commit message if patch doesn't contain one
 608                 [ ! -s "$TMP_MSG" ] && echo "patch $pname" > "$TMP_MSG"
 609
 610                 # extract author and date lines from the patch header, and set
 611                 # GIT_AUTHOR_{NAME,EMAIL,DATE}
 612                 # prefering Author/AuthorDate lines if available.
 613                 author_str=`sed -n -e '/^Author:/ { s/^Author: //; p; q; }; /^(diff |---$|--- )/ q' "$p"`
 614                 if [ -z "$author_str" ]; then
 615                         author_str=`sed -n -e '/^From:/ { s/^From: //; p; q; }; /^(diff |---$|--- )/ q' "$p"`
 616                 fi
 617
 618                 if [ ! -z "$author_str" ]; then
 619                         GIT_AUTHOR_NAME=`echo $author_str | sed -e 's/ *<.*$//'`
 620                         export GIT_AUTHOR_NAME="${GIT_AUTHOR_NAME:-" "}"
 621                         export GIT_AUTHOR_EMAIL="`echo $author_str | sed -e 's/[^<]*//'`"
 622
 623                         author_date_str=`sed -n -e '/^AuthorDate:/ { s/^AuthorDate: //; p; q; }; /^(diff |---$|--- )/ q' "$p"`
 624                         if [ -z "$author_date_str" ]; then
 625                                 author_date_str=`sed -n -e '/^Date:/ { s/^Date: //; p; q; }; /^(diff |---$|--- )/ q' "$p"`
 626                         fi
 627                         if [ ! -z "$author_date_str" ]; then
 628                                 export GIT_AUTHOR_DATE="$author_date_str"
 629                         fi
 630                 fi
 631
 632                 # `git log -1 --pretty=%ct` doesn't work on Git 1.5.x
 633                 ct=`git cat-file commit HEAD | awk '/^committer /{ print $(NF-1); exit; }'`
 634                 if [ $ct -gt `last_modified "$p"` ]; then
 635                         ct=`expr $ct + 60`
 636                         if [ $ct -gt `date +%s` ]; then
 637                                 touch "$p"
 638                         else
 639                                 touch_date $ct "$p"
 640                         fi
 641                 fi
 642
 643                 export GIT_COMMITTER_DATE="`format_last_modified "$p"`"
 644
 645                 # export GIT_AUTHOR_DATE only if a Date line was unavailable
 646                 if [ -z "$author_date_str" ]; then
 647                         export GIT_AUTHOR_DATE="$GIT_COMMITTER_DATE"
 648                 fi
 649
 650                 # commit
 651                 treeish=`git write-tree`
 652                 commitish=`git commit-tree $treeish -p $2 < "$TMP_MSG"`
 653                 if $old_style_prefix || git rev-parse --verify --quiet refs/heads/$GUILT_PREFIX$branch >/dev/null
 654                 then
 655                         git update-ref -m "$GIT_REFLOG_ACTION" HEAD $commitish
 656                 else
 657                         git branch $GUILT_PREFIX$branch $commitish
 658                         git symbolic-ref HEAD refs/heads/$GUILT_PREFIX$branch
 659                 fi
 660
 661                 # mark patch as applied
 662                 git update-ref "refs/patches/$branch/$pname" HEAD
 663
 664                 rm -f "$TMP_MSG"
 665         )
 666 }
 667
 668 # usage: push_patch patchname [bail_action]
 669 push_patch()
 670 {
 671         __push_patch_bail=0
 672
 673         (
 674                 TMP_LOG=`get_tmp_file log`
 675
 676                 p="$GUILT_DIR/$branch/$1"
 677                 pname="$1"
 678                 bail_action="$2"
 679                 reject="--reject"
 680
 681                 assert_head_check
 682                 cd_to_toplevel
 683
 684                 # apply the patch if and only if there is something to apply
 685                 if [ `do_get_patch "$p" | wc -l` -gt 0 ]; then
 686                         if [ "$bail_action" = abort ]; then
 687                                 reject=""
 688                         fi
 689                         git apply $guilt_push_diff_context --index \
 690                                 $reject "$p" > /dev/null 2> "$TMP_LOG"
 691                         __push_patch_bail=$?
 692
 693                         if [ $__push_patch_bail -ne 0 ]; then
 694                                 cat "$TMP_LOG" >&2
 695                                 if [ "$bail_action" = "abort" ]; then
 696                                         rm -f "$TMP_LOG" "$TMP_MSG"
 697                                         return $__push_patch_bail
 698                                 fi
 699                         fi
 700                 fi
 701
 702                 GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: $pname" \
 703                         commit "$pname" HEAD
 704
 705                 echo "$pname" >> "$applied"
 706
 707                 rm -f "$TMP_LOG"
 708         )
 709
 710         # sub-shell funky-ness
 711         __push_patch_bail=$?
 712
 713         return $__push_patch_bail
 714 }
 715
 716 # usage: must_commit_first
 717 must_commit_first()
 718 {
 719         git update-index --refresh --unmerged -q > /dev/null
 720         [ `git diff-files | wc -l` -eq 0 ] || return $?
 721         [ `git diff-index HEAD | wc -l` -eq 0 ]
 722         return $?
 723 }
 724
 725 # usage: fold_patch patchname
 726 fold_patch()
 727 {
 728         set -- "$1" "`get_top`"
 729
 730         assert_head_check
 731
 732         push_patch "$1"
 733
 734         # merge the patch headers
 735         (
 736                 pcur="$GUILT_DIR/$branch/$2"
 737                 pnext="$GUILT_DIR/$branch/$1"
 738                 TMP_CUR=`get_tmp_file diff-cur`
 739                 TMP_NEXT=`get_tmp_file diff-next`
 740                 TMP_DIFF=`get_tmp_file diff`
 741                 do_get_full_header "$pcur" > "$TMP_CUR"
 742                 do_get_full_header "$pnext" > "$TMP_NEXT"
 743                 do_get_patch "$pcur" > "$TMP_DIFF"
 744
 745                 case "`stat -c %s \"$TMP_CUR\"`,`stat -c %s \"$TMP_NEXT\"`" in
 746                         *,0)
 747                                 # since the new patch header is empty, we
 748                                 # don't have to do anything
 749                                 ;;
 750                         0,*)
 751                                 # current is empty; new is not
 752                                 mv "$pcur" "$pcur~"
 753                                 cat "$TMP_NEXT" > "$pcur"
 754                                 cat "$TMP_DIFF" >> "$pcur"
 755                                 ;;
 756                         *,*)
 757                                 mv "$pcur" "$pcur~"
 758                                 cat "$TMP_CUR" > "$pcur"
 759                                 echo >> "$pcur"
 760                                 echo "Header from folded patch '$1':" >> "$pcur"
 761                                 echo >> "$pcur"
 762                                 cat "$TMP_NEXT" >> "$pcur"
 763                                 cat "$TMP_DIFF" >> "$pcur"
 764                                 ;;
 765                 esac
 766
 767                 rm -f "$TMP_CUR" "$TMP_NEXT" "$TMP_DIFF"
 768         )
 769
 770         __refresh_patch "$2" HEAD^^ 2 "" ""
 771
 772         series_remove_patch "$1"
 773 }
 774
 775 # usage: refresh_patch patchname gengitdiff incldiffstat
 776 refresh_patch()
 777 {
 778         __refresh_patch "$1" HEAD^ 1 "$2" "$3"
 779 }
 780
 781 # usage: __refresh_patch patchname commitish number_of_commits gengitdiff
 782 #                        incldiffstat
 783 __refresh_patch()
 784 {
 785         assert_head_check
 786
 787         (
 788                 TMP_DIFF=`get_tmp_file diff`
 789
 790                 cd_to_toplevel
 791                 p="$GUILT_DIR/$branch/$1"
 792                 pname="$1"
 793
 794                 # get the patch header
 795                 do_get_full_header "$p" > "$TMP_DIFF"
 796
 797                 [ ! -z "$4" ] && diffopts="-C -M --find-copies-harder"
 798
 799                 if [ -n "$5" -o $diffstat = "true" ]; then
 800                         (
 801                                 echo "---"
 802                                 git diff --stat $diffopts "$2"
 803                                 echo ""
 804                         ) >> "$TMP_DIFF"
 805                 fi
 806
 807                 # get the new patch
 808                 git diff --binary $diffopts "$2" >> "$TMP_DIFF"
 809
 810                 # move the new patch in
 811                 mv "$p" "$p~"
 812                 mv "$TMP_DIFF" "$p"
 813
 814                 # commit
 815                 commit "$pname" "HEAD~$3"
 816
 817                 # drop folded patches
 818                 N=`expr "$3" - 1`
 819
 820                 # remove the patches refs
 821                 tail -n $N < "$applied" | remove_patch_refs
 822
 823                 n=`wc -l < "$applied"`
 824                 n=`expr $n - $N`
 825                 head_n "$n" < "$applied" > "$applied.tmp"
 826                 mv "$applied.tmp" "$applied"
 827         )
 828 }
 829
 830 # usage: munge_hash_range <hash range>
 831 #
 832 # this means:
 833 #       <hash>                  - one commit
 834 #       <hash>..                - hash until head (excludes hash, includes head)
 835 #       ..<hash>                - until hash (includes hash)
 836 #       <hash1>..<hash2>        - from hash to hash (inclusive)
 837 #
 838 # The output of this function is suitable to be passed to "git rev-list"
 839 munge_hash_range()
 840 {
 841         case "$1" in
 842                 *..*..*|*\ *)
 843                         # double .. or space is illegal
 844                         return 1;;
 845                 ..*)
 846                         # e.g., "..v0.10"
 847                         echo ${1#..};;
 848                 *..)
 849                         # e.g., "v0.19.."
 850                         echo ${1%..}..HEAD;;
 851                 *..*)
 852                         # e.g., "v0.19-rc1..v0.19"
 853                         echo ${1%%..*}..${1#*..};;
 854                 ?*)
 855                         # e.g., "v0.19"
 856                         echo $1^..$1;;
 857                 *)  # empty
 858                         return 1;;
 859         esac
 860         return 0
 861 }
 862
 863 # usage: get_tmp_file <prefix> [<opts>]
 864 #
 865 # Get a unique filename and create the file in a non-racy way
 866 get_tmp_file()
 867 {
 868         while true; do
 869                 mktemp $2 "/tmp/guilt.$1.XXXXXXXXXXXXXXX" && break
 870         done
 871 }
 872
 873 # usage: guilt_hook <hook name> <args....>
 874 guilt_hook()
 875 {
 876         __hookname="$1"
 877         [ ! -x "$GIT_DIR/hooks/guilt/$__hookname" ] && return 0
 878
 879         shift
 880
 881         "$GIT_DIR/hooks/guilt/$__hookname" "$@"
 882         return $?
 883 }
 884
 885 #
 886 # source the command
 887 #
 888 . "$cmd"
 889
 890 #
 891 # Some constants
 892 #
 893
 894 # default guilt.diffcontext value: int or bool
 895 DIFFCONTEXT_DEFAULT=1
 896
 897 # default diffstat value: true or false
 898 DIFFSTAT_DEFAULT="false"
 899
 900 # default guilt.reusebranch value: true or false
 901 REUSE_BRANCH_DEFAULT="false"
 902
 903 # Prefix for guilt branches.
 904 GUILT_PREFIX=guilt/
 905
 906 #
 907 # Parse any part of .git/config that belongs to us
 908 #
 909
 910 # amount of context
 911 diffcontext=`git config --bool-or-int guilt.diffcontext`
 912 case "$diffcontext" in
 913         false)
 914                 guilt_push_diff_context="-C0"
 915                 ;;
 916         true)
 917                 guilt_push_diff_context=
 918                 ;;
 919         '')
 920                 guilt_push_diff_context="-C$DIFFCONTEXT_DEFAULT"
 921                 ;;
 922         *)
 923                 guilt_push_diff_context="-C$diffcontext"
 924                 ;;
 925 esac
 926
 927 # generate diffstat?
 928 diffstat=`git config --bool guilt.diffstat`
 929 [ -z "$diffstat" ] && diffstat=$DIFFSTAT_DEFAULT
 930
 931 # reuse Git branch?
 932 reuse_branch=`git config --bool guilt.reusebranch`
 933 [ -z "$reuse_branch" ] && reuse_branch=$REUSE_BRANCH_DEFAULT
 934
 935 #
 936 # The following gets run every time this file is source'd
 937 #
 938
 939 GUILT_DIR="$GIT_DIR/patches"
 940
 941 # To make it harder to accidentally do "git push" with a guilt patch
 942 # applied, "guilt push" changes branch from e.g. "master" to
 943 # "guilt/master".  Set $git_branch to the full branch name, and
 944 # $branch to the abbreviated name that the user sees most of the time.
 945 # Note: old versions of guilt did not add the "guilt/" prefix.  This
 946 # code handles that case as well.  The prefix will be added when you
 947 # have no patches applied and do a "guilt push".
 948 raw_git_branch=`get_branch`
 949 branch=`echo "$raw_git_branch" | sed -e 's,^'$GUILT_PREFIX',,'`
 950
 951 git_branch()
 952 {
 953         if $old_style_prefix
 954         then
 955                 echo $branch
 956         elif [ -z "`get_top 2>/dev/null`" ]
 957         then
 958                 echo $branch
 959         else
 960                 echo $GUILT_PREFIX$branch
 961         fi
 962 }
 963
 964 # most of the time we want to verify that the repo's branch has been
 965 # initialized, but every once in a blue moon (e.g., we want to run guilt init),
 966 # we must avoid the checks
 967 if [ -z "$DO_NOT_CHECK_BRANCH_EXISTENCE" ]; then
 968         verify_branch
 969
 970         # do not check the status file format (guilt repair needs this,
 971         # otherwise nothing can do what's necessary to bring the repo into a
 972         # useable state)
 973         if [ -z "$DO_NOT_CHECK_STATUS_FILE_FORMAT" ]; then
 974                 [ -s "$GIT_DIR/patches/$branch/status" ] &&
 975                         grep "^[0-9a-f]\{40\}:" "$GIT_DIR/patches/$branch/status" > /dev/null &&
 976                         die "Status file appears to use old format, try guilt repair --status"
 977         fi
 978 fi
 979
 980 # very useful files
 981 series="$GUILT_DIR/$branch/series"
 982 applied="$GUILT_DIR/$branch/status"
 983 guards_file="$GUILT_DIR/$branch/guards"
 984
 985 # determine a pager to use for anything interactive (fall back to more)
 986 pager="more"
 987 [ ! -z "$PAGER" ] && pager="$PAGER"
 988
 989 UNAME_S=`uname -s`
 990
 991 if [ -r "$GUILT_PATH/os.$UNAME_S" ]; then
 992         . "$GUILT_PATH/os.$UNAME_S"
 993 elif [ -r "$GUILT_PATH/../lib/guilt/os.$UNAME_S" ]; then
 994         . "$GUILT_PATH/../lib/guilt/os.$UNAME_S"
 995 else
 996         die "Unsupported operating system: $UNAME_S"
 997 fi
 998
 999 if [ -n "`get_top 2>/dev/null`" ]; then
1000         # If there is at least one pushed patch, we set
1001         # old_style_prefix according to how it was pushed.  It is only
1002         # possible to change the prefix style while no patches are
1003         # applied.
1004         if [ "$branch" = "$raw_git_branch" ]; then
1005                 old_style_prefix=true
1006         else
1007                 old_style_prefix=false
1008         fi
1009 else
1010         old_style_prefix="$reuse_branch"
1011 fi
1012
1013 _main "$@"