fix: replace refs to components when splitting file

.changeset/clever-dolphins-approve.md

@@ -0,0 +1,5 @@
+---
+"@redocly/cli": patch
+---
+
+Fixed an issue with resolving references after splitting API descriptions written in the json format.

__tests__/commands.test.ts

@@ -4,6 +4,7 @@ import { join, relative } from 'path';
 import { toMatchSpecificSnapshot } from './specific-snapshot';
 import { getCommandOutput, getEntrypoints, callSerializer, getParams } from './helpers';
 import * as fs from 'fs';
+import { spawnSync } from 'child_process';
 
 expect.extend({
   toMatchExtendedSpecificSnapshot(received, snapshotFile) {
@@ -176,6 +177,32 @@ describe('E2E', () => {
       const result = getCommandOutput(args, folderPath);
       (<any>expect(result)).toMatchSpecificSnapshot(join(folderPath, 'snapshot.js'));
     });
+
+    test('openapi json file refs validation', () => {
+      const folderPath = join(__dirname, `split/refs-in-json`);
+      const file = '../../../__tests__/split/refs-in-json/openapi.json';
+
+      const args = getParams('../../../packages/cli/src/index.ts', 'split', [
+        file,
+        '--outDir=output',
+      ]);
+
+      // run the split command and write the result to files
+      spawnSync('ts-node', args, {
+        cwd: folderPath,
+        env: {
+          ...process.env,
+          NODE_ENV: 'production',
+          NO_COLOR: 'TRUE',
+        },
+      });
+
+      const lintArgs = getParams('../../../packages/cli/src/index.ts', 'lint', [
+        join(folderPath, 'output/openapi.json'),
+      ]);
+      const lintResult = getCommandOutput(lintArgs, folderPath);
+      (<any>expect(lintResult)).toMatchSpecificSnapshot(join(folderPath, 'snapshot.js'));
+    });
   });
 
   describe('join', () => {

__tests__/split/refs-in-json/openapi.json

@@ -0,0 +1,176 @@
+{
+  "openapi": "3.0.0",
+  "info": {
+    "version": "1.0.0",
+    "title": "Swagger Petstore",
+    "license": {
+      "name": "MIT",
+      "url": "https://tests.com"
+    }
+  },
+  "security": [],
+  "servers": [
+    {
+      "url": "http://petstore.swagger.io/v1"
+    }
+  ],
+  "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 (max 100)",
+            "required": false,
+            "schema": {
+              "type": "integer",
+              "format": "int32"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "A paged array of pets",
+            "headers": {
+              "x-next": {
+                "description": "A link to the next page of responses",
+                "schema": {
+                  "type": "string"
+                }
+              }
+            },
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Pets"
+                }
+              }
+            }
+          },
+          "400": {
+            "description": "Invalid request"
+          },
+          "default": {
+            "description": "unexpected error",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Error"
+                }
+              }
+            }
+          }
+        }
+      },
+      "post": {
+        "summary": "Create a pet",
+        "operationId": "createPets",
+        "tags": ["pets"],
+        "responses": {
+          "201": {
+            "description": "Null response"
+          },
+          "400": {
+            "description": "Invalid request"
+          },
+          "default": {
+            "description": "unexpected error",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Error"
+                }
+              }
+            }
+          }
+        }
+      }
+    },
+    "/pets/{petId}": {
+      "get": {
+        "summary": "Info for a specific pet",
+        "operationId": "showPetById",
+        "tags": ["pets"],
+        "parameters": [
+          {
+            "name": "petId",
+            "in": "path",
+            "required": true,
+            "description": "The id of the pet to retrieve",
+            "schema": {
+              "type": "string"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Expected response to a valid request",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Pet"
+                }
+              }
+            }
+          },
+          "400": {
+            "description": "Invalid request"
+          },
+          "default": {
+            "description": "unexpected error",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Error"
+                }
+              }
+            }
+          }
+        }
+      }
+    }
+  },
+  "components": {
+    "schemas": {
+      "Pet": {
+        "type": "object",
+        "required": ["id", "name"],
+        "properties": {
+          "id": {
+            "type": "integer",
+            "format": "int64"
+          },
+          "name": {
+            "type": "string"
+          },
+          "tag": {
+            "type": "string"
+          }
+        }
+      },
+      "Pets": {
+        "type": "array",
+        "items": {
+          "$ref": "#/components/schemas/Pet"
+        }
+      },
+      "Error": {
+        "type": "object",
+        "required": ["code", "message"],
+        "properties": {
+          "code": {
+            "type": "integer",
+            "format": "int32"
+          },
+          "message": {
+            "type": "string"
+          }
+        }
+      }
+    }
+  }
+}

__tests__/split/refs-in-json/snapshot.js

@@ -0,0 +1,13 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`E2E split openapi json file refs validation 1`] = `
+
+No configurations were provided -- using built in recommended configuration by default.
+
+validating /output/openapi.json...
+/output/openapi.json: validated in <test>ms
+
+Woohoo! Your API description is valid. 🎉
+
+
+`;

packages/cli/src/commands/split/index.ts

@@ -97,8 +97,8 @@ function isStartsWithComponents(node: string) {
   return node.startsWith(componentsPath);
 }
 
-function isNotYaml(filename: string) {
-  return !(filename.endsWith('.yaml') || filename.endsWith('.yml'));
+function isSupportedExtension(filename: string) {
+  return filename.endsWith('.yaml') || filename.endsWith('.yml') || filename.endsWith('.json');
 }
 
 function loadFile(fileName: string) {
@@ -138,7 +138,7 @@ function traverseDirectoryDeepCallback(
   directory: string,
   componentsFiles: object
 ) {
-  if (isNotYaml(filename)) return;
+  if (!isSupportedExtension(filename)) return;
   const pathData = readYaml(filename);
   replace$Refs(pathData, directory, componentsFiles);
   writeToFileByExtension(pathData, filename);