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from packaging import version

# TODO: this code is shared with replicate's backend. Maybe we should put it in the Cog Python package as the source of truth?

def version_has_no_array_type(cog_version: str) -> bool:

"""Iterators have x-cog-array-type=iterator in the schema from 0.3.9 onward"""

return version.parse(cog_version) < version.parse("0.3.9")

def make_schema_backwards_compatible(

schema: dict,

version: str,

) -> dict:

"""A place to add backwards compatibility logic for our openapi schema"""

# If the top-level output is an array, assume it is an iterator in old versions which didn't have an array type

if version_has_no_array_type(version):

output = schema["components"]["schemas"]["Output"]

if output.get("type") == "array":

output["x-cog-array-type"] = "iterator"

return schema