WIP

modules/openapi-generator-maven-plugin/src/test/java/org/openapitools/codegen/plugin/CodeGenMojoTest.java

@@ -225,6 +225,43 @@ public void testInputSpecRootDirectoryDoesNotRequireInputSpec() throws Exception
         assertTrue(hashFolder.resolve("_merged_spec.yaml-executionId.sha256").toFile().exists());
     }
 
+    /**
+     * Regression test for <a href="https://github.com/OpenAPITools/openapi-generator/issues/4512">#4512</a>
+     */
+    public void test_skipIfSpecIsUnchanged_WillNotGenerateTwice_forMultipleExecutions_withIdenticalFilenames() throws Exception {
+
+        //GIVEN
+        /* Setup the mojo */
+        final Path tempDir = newTempFolder();
+        final CodeGenMojo mojo = loadMojo(tempDir, "src/test/resources/issue-4512", null, "execution_petstore1");
+        mojo.inputSpecRootDirectory = tempDir.toString();
+
+
+        /* Perform an initial generation */
+        mojo.execute();
+
+        /* Check the hash file was created */
+        final Path hashFolder = tempDir.resolve("target/generated-sources/issue-4512/.openapi-generator");
+        assertTrue(hashFolder.resolve("petstore.yaml-execution_petstore1.sha256").toFile().exists());
+        assertTrue(hashFolder.resolve("petstore.yaml-execution_petstore2.sha256").toFile().exists());
+
+        /* Remove the generated source */
+        FileUtils.deleteDirectory(tempDir.resolve("target/generated-sources/issue-4512/src").toFile());
+
+
+        // WHEN
+        /* Execute the mojo again */
+        mojo.execute();
+
+        // THEN
+        /* Verify that the source directory has not been repopulated. If it has then we generated code again */
+        assertFalse(
+            "src directory should not have been regenerated", 
+            tempDir.resolve("target/generated-sources/issue-4512/src").toFile().exists()
+        );
+
+    }
+
     protected CodeGenMojo loadMojo(Path temporaryFolder, String projectRoot, String profile) throws Exception {
         return loadMojo(temporaryFolder, projectRoot, profile, "default");
     }
@@ -236,6 +273,8 @@ protected CodeGenMojo loadMojo(Path temporaryFolder, String projectRoot, String
         MojoExecution execution = newMojoExecution("generate");
         MojoExecution executionWithId = copyWithExecutionId(executionId, execution);
         return (CodeGenMojo) lookupConfiguredMojo(session, executionWithId);
+//        codegenMojo.inputSpecRootDirectory = temporaryFolder.toString();
+//        return codegenMojo;
     }
 
     private MojoExecution copyWithExecutionId(String executionId, MojoExecution execution) {

modules/openapi-generator-maven-plugin/src/test/resources/issue-4512/dir1/petstore.yaml

@@ -0,0 +1,179 @@
+openapi: 3.0.0
+servers:
+  - url: 'http://petstore.swagger.io/v2'
+info:
+  description: This is a sample Petstore **ONE** server. 
+  version: 1.0.0
+  title: OpenAPI Petstore
+paths:
+  /pet:
+    post:
+      tags:
+        - pet
+      summary: Add a new pet to the store
+      description: ''
+      operationId: addPet
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/xml:
+              schema:
+                $ref: '#/components/schemas/Pet'
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Pet'
+        '405':
+          description: Invalid input
+      security:
+        - petstore_auth:
+            - 'write:pets'
+            - 'read:pets'
+      requestBody:
+        $ref: '#/components/requestBodies/Pet'
+  '/pet/{petId}':
+    get:
+      tags:
+        - pet
+      summary: Find pet by ID
+      description: Returns a single pet
+      operationId: getPetById
+      parameters:
+        - name: petId
+          in: path
+          description: ID of pet to return
+          required: true
+          schema:
+            type: integer
+            format: int64
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/xml:
+              schema:
+                $ref: '#/components/schemas/Pet'
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Pet'
+        '400':
+          description: Invalid ID supplied
+        '404':
+          description: Pet not found
+      security:
+        - api_key: []
+    post:
+      tags:
+        - pet
+      summary: Updates a pet in the store with form data
+      description: ''
+      operationId: updatePetWithForm
+      parameters:
+        - name: petId
+          in: path
+          description: ID of pet that needs to be updated
+          required: true
+          schema:
+            type: integer
+            format: int64
+      responses:
+        '405':
+          description: Invalid input
+      security:
+        - petstore_auth:
+            - 'write:pets'
+            - 'read:pets'
+      requestBody:
+        content:
+          application/x-www-form-urlencoded:
+            schema:
+              type: object
+              properties:
+                name:
+                  description: Updated name of the pet
+                  type: string
+                status:
+                  description: Updated status of the pet
+                  type: string
+    delete:
+      tags:
+        - pet
+      summary: Deletes a pet
+      description: ''
+      operationId: deletePet
+      parameters:
+        - name: api_key
+          in: header
+          required: false
+          schema:
+            type: string
+        - name: petId
+          in: path
+          description: Pet id to delete
+          required: true
+          schema:
+            type: integer
+            format: int64
+      responses:
+        '400':
+          description: Invalid pet value
+      security:
+        - petstore_auth:
+            - 'write:pets'
+            - 'read:pets'
+components:
+  requestBodies:
+    Pet:
+      content:
+        application/json:
+          schema:
+            $ref: '#/components/schemas/Pet'
+        application/xml:
+          schema:
+            $ref: '#/components/schemas/Pet'
+      description: Pet object that needs to be added to the store
+      required: true
+  securitySchemes:
+    petstore_auth:
+      type: oauth2
+      flows:
+        implicit:
+          authorizationUrl: 'http://petstore.swagger.io/api/oauth/dialog'
+          scopes:
+            'write:pets': modify pets in your account
+            'read:pets': read your pets
+    api_key:
+      type: apiKey
+      name: api_key
+      in: header
+  schemas:
+    Pet:
+      title: a Pet
+      description: A pet for sale in the pet store
+      type: object
+      required:
+        - name
+        - photoUrls
+      properties:
+        id:
+          type: integer
+          format: int64
+        name:
+          type: string
+          example: doggie
+        photoUrls:
+          type: array
+          xml:
+            name: photoUrl
+            wrapped: true
+          items:
+            type: string
+        status:
+          type: string
+          description: pet status in the store
+          enum:
+            - available
+            - pending
+            - sold
+      xml:
+        name: Pet