git-rebase--am.shon commit filter-branch: eliminate duplicate mapped parents (79bc4ef)
   1# This shell script fragment is sourced by git-rebase to implement
   2# its default, fast, patch-based, non-interactive mode.
   3#
   4# Copyright (c) 2010 Junio C Hamano.
   5#
   6
   7# The whole contents of this file is run by dot-sourcing it from
   8# inside a shell function.  It used to be that "return"s we see
   9# below were not inside any function, and expected to return
  10# to the function that dot-sourced us.
  11#
  12# However, FreeBSD /bin/sh misbehaves on such a construct and
  13# continues to run the statements that follow such a "return".
  14# As a work-around, we introduce an extra layer of a function
  15# here, and immediately call it after defining it.
  16git_rebase__am () {
  17
  18case "$action" in
  19continue)
  20        git am --resolved --resolvemsg="$resolvemsg" \
  21                ${gpg_sign_opt:+"$gpg_sign_opt"} &&
  22        move_to_original_branch
  23        return
  24        ;;
  25skip)
  26        git am --skip --resolvemsg="$resolvemsg" &&
  27        move_to_original_branch
  28        return
  29        ;;
  30esac
  31
  32test -n "$rebase_root" && root_flag=--root
  33
  34ret=0
  35if test -n "$keep_empty"
  36then
  37        # we have to do this the hard way.  git format-patch completely squashes
  38        # empty commits and even if it didn't the format doesn't really lend
  39        # itself well to recording empty patches.  fortunately, cherry-pick
  40        # makes this easy
  41        git cherry-pick ${gpg_sign_opt:+"$gpg_sign_opt"} --allow-empty "$revisions"
  42        ret=$?
  43else
  44        rm -f "$GIT_DIR/rebased-patches"
  45
  46        git format-patch -k --stdout --full-index --ignore-if-in-upstream \
  47                --src-prefix=a/ --dst-prefix=b/ --no-renames --no-cover-letter \
  48                $root_flag "$revisions" >"$GIT_DIR/rebased-patches"
  49        ret=$?
  50
  51        if test 0 != $ret
  52        then
  53                rm -f "$GIT_DIR/rebased-patches"
  54                case "$head_name" in
  55                refs/heads/*)
  56                        git checkout -q "$head_name"
  57                        ;;
  58                *)
  59                        git checkout -q "$orig_head"
  60                        ;;
  61                esac
  62
  63                cat >&2 <<-EOF
  64
  65                git encountered an error while preparing the patches to replay
  66                these revisions:
  67
  68                    $revisions
  69
  70                As a result, git cannot rebase them.
  71                EOF
  72                return $?
  73        fi
  74
  75        git am $git_am_opt --rebasing --resolvemsg="$resolvemsg" \
  76                ${gpg_sign_opt:+"$gpg_sign_opt"} <"$GIT_DIR/rebased-patches"
  77        ret=$?
  78
  79        rm -f "$GIT_DIR/rebased-patches"
  80fi
  81
  82if test 0 != $ret
  83then
  84        test -d "$state_dir" && write_basic_state
  85        return $ret
  86fi
  87
  88move_to_original_branch
  89
  90}
  91# ... and then we call the whole thing.
  92git_rebase__am