def _add_blast():
	print("    Installing blast...")
	_create_tools_dir()
	_add_package(dependency_URL, vigor_tars["BLAST_TAR_FILENAME"], vigor_dirs["BLAST_DIR"], "tar")
	if not _path_exists(os.path.join(vigor_dirs["EXE_DIR"], "blastall")):
		sudo("ln -sf %s %s" % (os.path.join(vigor_dirs["BLAST_DIR"], vigor_names["BLAST_NAME"], "bin", "bl2seq"), vigor_dirs["EXE_DIR"]))
		sudo("ln -sf %s %s" % (os.path.join(vigor_dirs["BLAST_DIR"], vigor_names["BLAST_NAME"], "bin", "blastall"), vigor_dirs["EXE_DIR"]))
		sudo((os.path.join(vigor_dirs["BLAST_DIR"], vigor_names["BLAST_NAME"], "bin", "fastacmd"), vigor_dirs["EXE_DIR"]) % "ln -sf %s %s")
		sudo("ln -sf %s %s" % (os.path.join(vigor_dirs["BLAST_DIR"], vigor_names["BLAST_NAME"], "bin", "formatdb"), vigor_dirs["EXE_DIR"]))
dataset/ETHPy150Open chapmanb/cloudbiolinux/cloudbio/custom/vcr.py/_add_blast/swapped operands of `%`