git-applymbox.sh

   1 #!/bin/sh
   2 ##
   3 ## "dotest" is my stupid name for my patch-application script, which
   4 ## I never got around to renaming after I tested it. We're now on the
   5 ## second generation of scripts, still called "dotest".
   6 ##
   7 ## Update: Ryan Anderson finally shamed me into naming this "applymbox".
   8 ##
   9 ## You give it a mbox-format collection of emails, and it will try to
  10 ## apply them to the kernel using "applypatch"
  11 ##
  12 ## The patch application may fail in the middle.  In which case:
  13 ## (1) look at .dotest/patch and fix it up to apply
  14 ## (2) re-run applymbox with -c .dotest/msg-number for the current one.
  15 ## Pay a special attention to the commit log message if you do this and
  16 ## use a Signoff_file, because applypatch wants to append the sign-off
  17 ## message to msg-clean every time it is run.
  18 ##
  19 ## git-am is supposed to be the newer and better tool for this job.
  20
  21 USAGE='[-u] [-k] [-q] [-m] (-c .dotest/<num> | mbox) [signoff]'
  22 . git-sh-setup
  23
  24 git var GIT_COMMITTER_IDENT >/dev/null || exit
  25
  26 keep_subject= query_apply= continue= utf8= resume=t
  27 while case "$#" in 0) break ;; esac
  28 do
  29         case "$1" in
  30         -u)     utf8=-u ;;
  31         -k)     keep_subject=-k ;;
  32         -q)     query_apply=t ;;
  33         -c)     continue="$2"; resume=f; shift ;;
  34         -m)     fall_back_3way=t ;;
  35         -*)     usage ;;
  36         *)      break ;;
  37         esac
  38         shift
  39 done
  40
  41 case "$continue" in
  42 '')
  43         rm -rf .dotest
  44         mkdir .dotest
  45         num_msgs=$(git-mailsplit "$1" .dotest) || exit 1
  46         echo "$num_msgs patch(es) to process."
  47         shift
  48 esac
  49
  50 files=$(git-diff-index --cached --name-only HEAD) || exit
  51 if [ "$files" ]; then
  52    echo "Dirty index: cannot apply patches (dirty: $files)" >&2
  53    exit 1
  54 fi
  55
  56 case "$query_apply" in
  57 t)      touch .dotest/.query_apply
  58 esac
  59 case "$fall_back_3way" in
  60 t)      : >.dotest/.3way
  61 esac
  62 case "$keep_subject" in
  63 -k)     : >.dotest/.keep_subject
  64 esac
  65
  66 signoff="$1"
  67 set x .dotest/0*
  68 shift
  69 while case "$#" in 0) break;; esac
  70 do
  71     i="$1"
  72     case "$resume,$continue" in
  73     f,$i)       resume=t;;
  74     f,*)        shift
  75                 continue;;
  76     *)
  77             git-mailinfo $keep_subject $utf8 \
  78                 .dotest/msg .dotest/patch <$i >.dotest/info || exit 1
  79             git-stripspace < .dotest/msg > .dotest/msg-clean
  80             ;;
  81     esac
  82     while :; # for fixing up and retry
  83     do
  84         git-applypatch .dotest/msg-clean .dotest/patch .dotest/info "$signoff"
  85         case "$?" in
  86         0)
  87                 # Remove the cleanly applied one to reduce clutter.
  88                 rm -f .dotest/$i
  89                 ;;
  90         2)
  91                 # 2 is a special exit code from applypatch to indicate that
  92                 # the patch wasn't applied, but continue anyway
  93                 ;;
  94         *)
  95                 ret=$?
  96                 if test -f .dotest/.query_apply
  97                 then
  98                         echo >&2 "* Patch failed."
  99                         echo >&2 "* You could fix it up in your editor and"
 100                         echo >&2 "  retry.  If you want to do so, say yes here"
 101                         echo >&2 "  AFTER fixing .dotest/patch up."
 102                         echo >&2 -n "Retry [y/N]? "
 103                         read yesno
 104                         case "$yesno" in
 105                         [Yy]*)
 106                                 continue ;;
 107                         esac
 108                 fi
 109                 exit $ret
 110         esac
 111         break
 112     done
 113     shift
 114 done
 115 # return to pristine
 116 rm -fr .dotest