def _sanity_check(self):
"""
Check if the image path already exists,
and if so raise an error.
:raises: sponson.image.build.BuilderError
"""
self.image_path = os.path.join(BASE_IMAGE_DIR, self.name, self.version)
self.config_path = os.path.join(BASE_CONF_DIR, self.name,
"{}.yaml".format(self.version))
if os.path.exists(self.image_path):
raise BuilderError("Image path already exists")
try:
os.makedirs(self.image_path)
except PermissionError:
raise BuilderError("Insufficient permissions to make image")
if not os.path.exists(os.path.dirname(self.config_path)):
try:
os.makedirs(os.path.dirname(self.config_path))
except PermissionError:
raise BuilderError("Insufficient permissions to save config")
if self.srcimage:
srcimage = check_if_versioned(self.srcimage)
if not srcimage or not os.path.exists(srcimage):
raise BuilderError("Cannot find source image")
def __init__(self, config, runtime_config, version="latest", update=True):
"""
Rebuild an image.
:param config: image configuration
:type config: dict
:param runtime_config: local runtime configuration
:type runtime_config: dict
:param version: new image version, defaults to "latest"
:type version: str
:param update: update any source images to the latest versions,
defaults to running updates
:type update: bool
"""
super().__init__(config, runtime_config)
if version == "latest" or self.all_config["image"]["version"] == "now":
self.version = datetime.now().strftime("%Y%m%dT%H%M%S")
else:
self.version = version
self.config["version"] = self.version
if update and self.srcimage:
srcimage_path = check_if_versioned(self.srcimage)
if srcimage_path:
self.srcimage = os.path.relpath(
os.path.realpath(srcimage_path), BASE_IMAGE_DIR)
def _check_if_version(self, image):
"""
Checks if supplied image is versioned.
:param image: image with possible version to check
:type image: str
:return: sanitised/checked image string
:rtype: str
:raises: BuilderError
"""
version = check_if_versioned(image)
if version:
return version
else:
raise BuilderError("Cannot determine version of the image")
def _check_if_version(self, image):
"""
Checks if supplied image is versioned.
:param image: image with possible version to check
:type image: str
:return: sanitised/checked image string
:rtype: str
"""
# Check if the image we've been given
# is the name or the actual version
version = check_if_versioned(image)
if version:
return version
else:
raise NewContainerError("Cannot determine version of the image")
def mount_srcimage(self, image_name, image_version, srcimage):
"""
Mount source image(s) into the image.
:param image_name: image to mount into
:type image_name: str
:param image_version: version of the image
:type image_version: str
:param srcimage: source images to mount on
:type srcimage: str
"""
srcimage = check_if_versioned(srcimage)
image_mount = os.path.join(BASE_IMAGE_DIR, image_name, image_version)
overlay_path = os.path.join(MOUNT_OVERLAY_IMAGE, image_name,
image_version)
self._lower_overlay(overlay_path, srcimage, image_mount)