+ clean
+ mkdir -p t/sampledata/var/rev || exit $?
+ cd t/sampledata/var || exit $?
+ ln -sf a b || exit $?
+ ln -sf b c || exit $?
+ ln -sf "$(pwd)/abs-symlink-target" abs-symlink || exit $?
+ mkfifo fifo
+ mkdir -p cmd doc lib/bup || exit $?
+ cp -pP "$top"/cmd/*.py cmd/ || exit $?
+ cp -pP "$top"/Documentation/*.md doc/ || exit $?
+ cp -pP "$top"/lib/bup/*.py lib/bup || exit $?
+ # The "v" ensures that if "configure-sampledata
+ # --revision" and/or the setup above fails somehow,
+ # callers like make will be looking for a file that won't
+ # exist.
+ touch rev/v$revision || exit $?
+ ) || exit $?