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#!/bin/sh
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#
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# Copyright (c) 2005 Junio C Hamano.
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#
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. git-sh-setup-script || die "Not a git archive."
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usage="usage: $0 "'<upstream> [<head>]
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__*__*__*__*__> <upstream>
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/
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fork-point
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\__+__+__+__+__+__+__+__> <head>
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Each commit between the fork-point and <head> is examined, and
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compared against the change each commit between the fork-point and
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<upstream> introduces. If the change does not seem to be in the
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upstream, it is shown on the standard output.
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The output is intended to be used as:
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OLD_HEAD=$(git-rev-parse HEAD)
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git-rev-parse upstream >${GIT_DIR-.}/HEAD
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git-cherry upstream $OLD_HEAD |
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while read commit
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do
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GIT_EXTERNAL_DIFF=git-apply-patch-script git-diff-tree -p "$commit" &&
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git-commit-script -C "$commit"
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done
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'
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case "$#,$1" in
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1,*..*)
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upstream=$(expr "$1" : '\(.*\)\.\.') ours=$(expr "$1" : '.*\.\.\(.*\)$')
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set x "$upstream" "$ours"
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shift ;;
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esac
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case "$#" in
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1) upstream=`git-rev-parse --verify "$1"` &&
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ours=`git-rev-parse --verify HEAD` || exit
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;;
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2) upstream=`git-rev-parse --verify "$1"` &&
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ours=`git-rev-parse --verify "$2"` || exit
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;;
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*) echo >&2 "$usage"; exit 1 ;;
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esac
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# Note that these list commits in reverse order;
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# not that the order in inup matters...
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inup=`git-rev-list ^$ours $upstream` &&
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ours=`git-rev-list $ours ^$upstream` || exit
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tmp=.cherry-tmp$$
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patch=$tmp-patch
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mkdir $patch
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trap "rm -rf $tmp-*" 0 1 2 3 15
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_x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
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_x40="$_x40$_x40$_x40$_x40$_x40$_x40$_x40$_x40"
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for c in $inup
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do
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git-diff-tree -p $c
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done | git-patch-id |
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while read id name
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do
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echo $name >>$patch/$id
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done
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LF='
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'
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O=
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for c in $ours
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do
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set x `git-diff-tree -p $c | git-patch-id`
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if test "$2" != ""
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then
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if test -f "$patch/$2"
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then
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sign=-
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else
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sign=+
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fi
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case "$O" in
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'') O="$sign $c" ;;
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*) O="$sign $c$LF$O" ;;
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esac
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fi
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done
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case "$O" in
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'') ;;
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*) echo "$O" ;;
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esac
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