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#!/bin/sh
#
# Copyright (c) 2005 Linus Torvalds
# Copyright (c) 2005 Junio C Hamano
rev=$(git-rev-parse --revs-only --no-flags --sq "$@") || exit
flags=$(git-rev-parse --no-revs --flags --sq "$@")
files=$(git-rev-parse --no-revs --no-flags --sq "$@")
: ${flags:="'-M' '-p'"}
# I often say 'git diff --cached -p' and get scolded by git-diff-files, but
# obviously I mean 'git diff --cached -p HEAD' in that case.
case "$rev" in
'')
case " $flags " in
*" '--cached' "*)
rev='HEAD '
;;
esac
esac
case "$rev" in
?*' '?*' '?*)
echo >&2 "I don't understand"
exit 1
;;
?*' '^?*)
begin=$(expr "$rev" : '.*^.\([0-9a-f]*\).*') &&
end=$(expr "$rev" : '.\([0-9a-f]*\). .*') || exit
cmd="git-diff-tree $flags $begin $end $files"
;;
?*' '?*)
cmd="git-diff-tree $flags $rev $files"
;;
?*' ')
cmd="git-diff-index $flags $rev $files"
;;
'')
cmd="git-diff-files $flags $files"
;;
*)
die "I don't understand $*"
;;
esac
eval "$cmd"
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