tg-rebase.sh

   1 #!/bin/sh
   2 # TopGit rebase command
   3 # (C) 2015 Kyle J. McKay <mackyle@gmail.com>
   4 # GPLv2
   5
   6 USAGE="Usage: ${tgname:-tg} [...] rebase (-m | --merge) [<git-rebase-arg>...]"
   7
   8 case "$1" in -h|--help)
   9         printf '%s\n' "$USAGE"
  10         exit 0
  11 esac
  12
  13 optmerge=
  14 optcontinue=
  15 for arg; do
  16         case "$arg" in
  17                 -m|--merge)
  18                         optmerge=1
  19                         ;;
  20                 --skip|--continue|--abort|--edit-todo)
  21                         optcontinue=1
  22                         ;;
  23         esac
  24 done
  25 if [ -n "$optcontinue" ]; then
  26         if [ -n "$git_dir" ] && [ -d "$git_dir" ] && ! [ -d "$git_dir/rebase-merge" ]; then
  27                 exec git rebase "$@"
  28                 exit 1
  29         fi
  30 fi
  31 if [ -z "$optmerge" -a -z "$optcontinue" ]; then
  32     cat <<EOT >&2
  33 ${tgname:-tg} rebase is intended as a drop-in replacement for git rebase -m.
  34 Either add the -m (or --merge) option to the command line or use git rebase
  35 directly.  When using rebase to flatten history the merge mode is superior.
  36 EOT
  37     exit 1
  38 fi
  39
  40 if [ -z "$optcontinue" ]; then
  41         rerereon="$(git config --get --bool rerere.enabled 2>/dev/null || :)"
  42         [ "$rerereon" = "true" ] ||
  43         warn "rerere.enabled is false, automatic --continue not possible"
  44 fi
  45
  46 [ "$*" = "--abort" ] || ensure_ident_available
  47 continuemsg='"git rebase --continue"'
  48 lasthead=
  49 newhead="$(git rev-parse --verify --quiet HEAD -- || :)"
  50
  51 while
  52         lasthead="$newhead"
  53         hascontinuemsg=
  54         err=0
  55         msg="$(git -c rerere.autoupdate=true rebase "$@"  3>&2 2>&1 1>&3 3>&-)" || err=$?
  56         case "$msg" in *"$continuemsg"*) hascontinuemsg=1; esac
  57         newhead="$(git rev-parse --verify --quiet HEAD -- || :)"
  58         [ "$newhead" != "$lasthead" ] || hascontinuemsg=
  59         msg="$(printf '%s\n' "$msg" | sed -e 's~git rebase ~'"$tgdisplay"' rebase ~g')"
  60         [ $err -ne 0 ]
  61 do
  62         if [ -n "$hascontinuemsg" ] && [ $(git ls-files --unmerged | wc -l) -eq 0 ]; then
  63                 while IFS= read -r line; do case "$line" in
  64                         "Staged "*|"Resolved "*|"Recorded "*)
  65                                 printf '%s\n' "$line";;
  66                         *)
  67                                 break;;
  68                 esac; done <<-EOT
  69                         $msg
  70                 EOT
  71                 set -- --continue
  72                 continue
  73         fi
  74         break
  75 done
  76
  77 [ -z "$msg" ] || printf '%s\n' "$msg" >&2
  78 exit $err