def render_chart(chart_dir, output_path, **kwargs):
"""renders helm chart located at chart_dir, and stores the output to output_path"""
try:
# lib is opened inside the function to allow multiprocessing
lib = ffi.dlopen(
os.path.join(os.path.dirname(os.path.abspath(__file__)),
"libtemplate.so"))
except (NameError, OSError):
raise HelmBindingUnavailableError(
"Helm binding is not available. Run 'make build_helm_binding' to create it"
)
if kwargs.get('helm_values_file', None):
helm_values_file = ffi.new("char[]",
kwargs['helm_values_file'].encode('ascii'))
else:
# the value in kwargs can be None
helm_values_file = ffi.new("char[]", "".encode('ascii'))
if kwargs.get('namespace', None):
namespace = ffi.new("char[]", kwargs['namespace'].encode('ascii'))
else:
namespace = ffi.new("char[]", 'default'.encode('ascii'))
if kwargs.get('release_name', None):
release_name = ffi.new("char[]",
kwargs['release_name'].encode('ascii'))
else:
release_name = ffi.new("char[]", ''.encode('ascii'))
if kwargs.get('name_template', None):
name_template = ffi.new("char[]",
kwargs['name_template'].encode('ascii'))
else:
name_template = ffi.new("char[]", ''.encode('ascii'))
char_dir_buf = ffi.new("char[]", chart_dir.encode('ascii'))
output_path_buf = ffi.new("char[]", output_path.encode('ascii'))
c_error_message = lib.renderChart(char_dir_buf, output_path_buf,
helm_values_file, namespace,
release_name, name_template)
error_message = ffi.string(c_error_message) # this creates a copy as bytes
lib.free(c_error_message) # free the char* returned by go
return error_message.decode("utf-8") # empty if no error
def render_chart(self, chart_dir, output_path, **kwargs):
"""renders helm chart located at chart_dir, and stores the output to output_path"""
if kwargs.get("helm_values_file", None):
helm_values_file = ffi.new(
"char[]", kwargs["helm_values_file"].encode("ascii"))
else:
# the value in kwargs can be None
helm_values_file = ffi.new("char[]", "".encode("ascii"))
if kwargs.get("namespace", None):
namespace = ffi.new("char[]", kwargs["namespace"].encode("ascii"))
else:
namespace = ffi.new("char[]", "default".encode("ascii"))
if kwargs.get("release_name", None):
release_name = ffi.new("char[]",
kwargs["release_name"].encode("ascii"))
else:
release_name = ffi.new("char[]", "".encode("ascii"))
if kwargs.get("name_template", None):
name_template = ffi.new("char[]",
kwargs["name_template"].encode("ascii"))
else:
name_template = ffi.new("char[]", "".encode("ascii"))
char_dir_buf = ffi.new("char[]", chart_dir.encode("ascii"))
output_path_buf = ffi.new("char[]", output_path.encode("ascii"))
c_error_message = self.lib.renderChart(char_dir_buf, output_path_buf,
helm_values_file, namespace,
release_name, name_template)
error_message = ffi.string(
c_error_message) # this creates a copy as bytes
self.lib.free(c_error_message) # free the char* returned by go
return error_message.decode("utf-8") # empty if no error
def render_chart(self, chart_dir, output_path, **kwargs):
"""renders helm chart located at chart_dir, and stores the output to output_path"""
if kwargs.get("helm_values_file", None):
helm_values_file = ffi.new(
"char[]", kwargs["helm_values_file"].encode("ascii"))
else:
# the value in kwargs can be None
helm_values_file = ffi.new("char[]", "".encode("ascii"))
if kwargs.get("namespace", None):
namespace = ffi.new("char[]", kwargs["namespace"].encode("ascii"))
else:
namespace = ffi.new("char[]", "default".encode("ascii"))
if kwargs.get("release_name", None):
release_name = ffi.new("char[]",
kwargs["release_name"].encode("ascii"))
else:
release_name = ffi.new("char[]", "".encode("ascii"))
if kwargs.get("name_template", None):
name_template = ffi.new("char[]",
kwargs["name_template"].encode("ascii"))
else:
name_template = ffi.new("char[]", "".encode("ascii"))
char_dir_buf = ffi.new("char[]", chart_dir.encode("ascii"))
output_path_buf = ffi.new("char[]", output_path.encode("ascii"))
kube_version = ffi.new("char[]", self.kube_version.encode("ascii"))
# as noted in cffi documentation, once the reference to the pointer is out of scope, the data is freed.
# to prevent that from happening with these dynamic arrays, we create a 'keep_pointers_alive' dict
# https://cffi.readthedocs.io/en/latest/using.html#working-with-pointers-structures-and-arrays
helm_values_files = []
keep_pointers_alive = dict()
if kwargs.get("helm_values_files", []):
for i in range(len(kwargs["helm_values_files"])):
file_name = kwargs["helm_values_files"][i]
ptr_to_encoded_file_name = ffi.new("char[]",
file_name.encode("ascii"))
keep_pointers_alive[file_name +
str(i)] = ptr_to_encoded_file_name
helm_values_files.append(ptr_to_encoded_file_name)
helm_values_files_len = ffi.cast("int", len(helm_values_files))
helm_values_files = ffi.new("char *[]", helm_values_files)
c_error_message = self.lib.renderChart(
char_dir_buf,
output_path_buf,
helm_values_file,
namespace,
release_name,
name_template,
helm_values_files,
helm_values_files_len,
kube_version,
)
error_message = ffi.string(
c_error_message) # this creates a copy as bytes
self.lib.free(c_error_message) # free the char* returned by go
return error_message.decode("utf-8") # empty if no error