def __use_cached_root_or_prepare(self):
"""
Tries to find cached root and uses it in case it exists and prepares
it otherwise.
"""
image_info = "{0}".format((self.names, self.repositories,
self.architecture,
os.path.basename(self.kickstart_file_path)))
cached_images_info_paths = files.find_fast(
patching_cache_path, ".*preliminary_image.info.txt")
matching_images_path = None
for info_path in cached_images_info_paths:
cached_images_path = info_path.replace(".info.txt", "")
if not os.path.isdir(cached_images_path):
logging.error("Directory {0} not "
"found!".format(cached_images_path))
continue
lines = []
with open(info_path, "r") as info_file:
for line in info_file:
lines.append(line)
if lines[0] == image_info:
matching_images_path = cached_images_path
break
if matching_images_path is not None:
self.patching_root = matching_images_path
logging.info("Found already prepared patching root: "
"{0}".format(matching_images_path))
else:
self.__prepare()
cached_chroot_path = os.path.join(
patching_cache_path, os.path.basename(
self.patching_root) + "preliminary_image")
hidden_subprocess.call(
"Saving chroot to cache",
["cp", "-a", self.patching_root, cached_chroot_path])
info_path = cached_chroot_path + ".info.txt"
with open(info_path, "wb") as info_file:
info_file.write(image_info)
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