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#!/bin/sh
#
# Set up GIT_DIR and GIT_OBJECT_DIRECTORY
# and return true if everything looks ok
#
: ${GIT_DIR=.git}
: ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"}

# Having this variable in your environment would break scripts because
# you would cause "cd" to be be taken to unexpected places. If you
# like CDPATH, define it for your interactive shell sessions without
# exporting it.
unset CDPATH

die() {
echo "$@" >&2
exit 1
}

check_clean_tree() {
    dirty1_=`git-update-index -q --refresh` && {
    dirty2_=`git-diff-index --name-only --cached HEAD`
    case "$dirty2_" in '') : ;; *) (exit 1) ;; esac
    } || {
echo >&2 "$dirty1_"
echo "$dirty2_" | sed >&2 -e 's/^/modified: /'
(exit 1)
    }
}

[ -h "$GIT_DIR/HEAD" ] &&
[ -d "$GIT_DIR/refs" ] &&
[ -d "$GIT_OBJECT_DIRECTORY/00" ]
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