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@typespec/openapi3

TypeSpec library for emitting OpenAPI 3.0 from the TypeSpec REST protocol binding and converting OpenAPI3 to TypeSpec

Install

npm install @typespec/openapi3

Usage

  1. Via the command line
tsp compile . --emit=@typespec/openapi3
  1. Via the config
emit:
  - "@typespec/openapi3"

The config can be extended with options as follows:

emit:
  - "@typespec/openapi3"
options:
  "@typespec/openapi3":
    option: value

Emitter options

file-type

Type: "yaml" | "json"

If the content should be serialized as YAML or JSON. Default 'yaml', it not specified infer from the output-file extension

output-file

Type: string

Name of the output file. Output file will interpolate the following values:

  • service-name: Name of the service if multiple
  • version: Version of the service if multiple

Default: {service-name}.{version}.openapi.yaml or .json if file-type is "json"

Example Single service no versioning

  • openapi.yaml

Example Multiple services no versioning

  • openapi.Org1.Service1.yaml
  • openapi.Org1.Service2.yaml

Example Single service with versioning

  • openapi.v1.yaml
  • openapi.v2.yaml

Example Multiple service with versioning

  • openapi.Org1.Service1.v1.yaml
  • openapi.Org1.Service1.v2.yaml
  • openapi.Org1.Service2.v1.0.yaml
  • openapi.Org1.Service2.v1.1.yaml

new-line

Type: "crlf" | "lf"

Set the newline character for emitting files.

omit-unreachable-types

Type: boolean

Omit unreachable types. By default all types declared under the service namespace will be included. With this flag on only types references in an operation will be emitted.

include-x-typespec-name

Type: "inline-only" | "never"

If the generated openapi types should have the x-typespec-name extension set with the name of the TypeSpec type that created it. This extension is meant for debugging and should not be depended on.

safeint-strategy

Type: "double-int" | "int64"

How to handle safeint type. Options are:

  • double-int: Will produce type: integer, format: double-int
  • int64: Will produce type: integer, format: int64

Default: int64

Decorators

TypeSpec.OpenAPI

@oneOf

Specify that oneOf should be used instead of anyOf for that union.

@TypeSpec.OpenAPI.oneOf
Target

Union | ModelProperty

Parameters

None

@useRef

Specify an external reference that should be used inside of emitting this type.

@TypeSpec.OpenAPI.useRef(ref: valueof string)
Target

Model | ModelProperty

Parameters
Name Type Description
ref valueof string External reference(e.g. "../../common.json#/components/schemas/Foo")