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xgit_enable() {
local top=$(readlink -f "${1:-$PWD}")
if [ ! -d "$top/git" -o ! -d "$top/gitwd" ]; then
echo "git/ and gitwd/ must exist" >&2
return 2
fi
export XGIT_TOP="$top"
export GIT_DIR=$(readlink -f "$top/git")
export GIT_WORK_TREE=$(readlink -f "$top/gitwd")
export XGIT_OLD_PS1="$PS1"
export PS1=$(echo "$PS1"|perl -pe 's/(\s*)$/(xgit \$XGIT_TOP)\1\2/')
}
xgit_disable() {
unset GIT_DIR GIT_WORK_TREE XGIT_TOP
[ "$XGIT_OLD_PS1" != "" ] && export PS1="$XGIT_OLD_PS1"
unset XGIT_OLD_PS1
}
xgit() {
if [ "$XGIT_TOP" = "" ]; then
xgit_enable "$1"
else
xgit_disable
fi
}
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