Add support for older versions with bzlmod

extension.bzl

@@ -1,15 +1,26 @@
 "modules extension to use with openapi-generator-bazel"
+
 load("@bazel_tools//tools/build_defs/repo:jvm.bzl", "jvm_maven_import_external")
 
-def _openapi_generator_impl(module_ctx):
+def get_wanted_module(module_ctx):
+    wanted_module = None
     for mod in module_ctx.modules:
-        for install in mod.tags.client:
-            jvm_maven_import_external(
-                name = "openapi_tools_generator_bazel_cli",
-                artifact_sha256 = install.sha256,
-                artifact = "org.openapitools:openapi-generator-cli:" + install.version,
-                server_urls = install.server_urls,
-            )
+        if mod.is_root and mod.tags.client:
+            return mod
+        if wanted_module == None and mod.tags.client:
+            wanted_module = mod
+    return wanted_module
+
+def _openapi_generator_impl(module_ctx):
+    wanted_module = get_wanted_module(module_ctx)
+
+    for install in wanted_module.tags.client:
+        jvm_maven_import_external(
+            name = "openapi_tools_generator_bazel_cli",
+            artifact_sha256 = install.sha256,
+            artifact = "org.openapitools:openapi-generator-cli:" + install.version,
+            server_urls = install.server_urls,
+        )
 
 _cli = tag_class(attrs = {
     "version": attr.string(
@@ -26,4 +37,3 @@ openapi_gen = module_extension(
     implementation = _openapi_generator_impl,
     tag_classes = {"client": _cli},
 )
-

internal/test/older-version/.gitignore

@@ -0,0 +1,4 @@
+bazel-bcr
+bazel-bin
+bazel-out
+bazel-testlogs

internal/test/older-version/BUILD

@@ -0,0 +1,8 @@
+load("@openapi_tools_generator_bazel//:defs.bzl", "openapi_generator")
+
+openapi_generator(
+    name = "pylib",
+    config = "config.yaml",
+    generator = "java",
+    spec = "petstore.yaml",
+)

internal/test/older-version/MODULE.bazel

@@ -0,0 +1,17 @@
+module(
+    name = "openapi_tools_generator_bazel_bcr_tests",
+    version = "1.2.3",
+)
+
+bazel_dep(name = "openapi_tools_generator_bazel", version = "")
+local_path_override(
+    module_name = "openapi_tools_generator_bazel",
+    path = "../../..",
+)
+
+openapi_gen = use_extension("@openapi_tools_generator_bazel//:extension.bzl", "openapi_gen")
+openapi_gen.client(
+    sha256 = "f18d771e98f2c5bb169d1d1961de4f94866d2901abc1e16177dd7e9299834721",
+    version = "6.5.0",
+)
+use_repo(openapi_gen, "openapi_tools_generator_bazel_cli")

internal/test/older-version/config.yaml

@@ -0,0 +1,10 @@
+# openapi-generator configuration
+---
+generatorName: python-flask
+packageName: openapi.bazel.test
+enablePostProcessFile: false
+globalProperties:
+  skipFormModel: false
+additionalProperties:
+  generated: generated
+  packageRoot: openapi.bazel

internal/test/older-version/petstore.yaml

@@ -0,0 +1,103 @@
+# Copyright 2019 OpenAPI-Generator-Bazel Contributors
+
+swagger: "2.0"
+info:
+  version: 1.0.0
+  title: Swagger Petstore
+  license:
+    name: MIT
+host: petstore.swagger.io
+basePath: /v1
+schemes:
+  - http
+consumes:
+  - application/json
+produces:
+  - application/json
+paths:
+  /pets:
+    get:
+      summary: List all pets
+      operationId: listPets
+      tags:
+        - pets
+      parameters:
+        - name: limit
+          in: query
+          description: How many items to return at one time
+          required: false
+          type: integer
+          format: int32
+      responses:
+        "200":
+          description: An paged array of pets
+          headers:
+            x-next:
+              type: string
+              description: A link to the next page of responses
+          schema:
+            $ref: "#/definitions/Pets"
+        default:
+          description: unexpected error
+          schema:
+            $ref: "#/definitions/Error"
+    post:
+      summary: Create a pet
+      operationId: createPets
+      tags:
+        - pets
+      responses:
+        "201":
+          description: Null response
+        default:
+          description: unexpected error
+          schema:
+            $ref: "#/definitions/Error"
+  /pets/{petId}:
+    get:
+      summary: Info for a specific pet
+      operationId: showPetById
+      tags:
+        - pets
+      parameters:
+        - name: petId
+          in: path
+          required: true
+          description: The id of the pet to retrieve
+          type: string
+      responses:
+        "200":
+          description: Expected response to a valid request
+          schema:
+            $ref: "#/definitions/Pets"
+        default:
+          description: unexpected error
+          schema:
+            $ref: "#/definitions/Error"
+definitions:
+  Pet:
+    required:
+      - id
+      - name
+    properties:
+      id:
+        type: integer
+        format: int64
+      name:
+        type: string
+      tag:
+        type: string
+  Pets:
+    type: array
+    items:
+      $ref: "#/definitions/Pet"
+  Error:
+    required:
+      - code
+      - message
+    properties:
+      code:
+        type: integer
+        format: int32
+      message:
+        type: string