fix: don't fail if can't find file and add json support

src/index/formatFileStructure/fixImports.ts

@@ -2,8 +2,9 @@ import { readFileSync, writeFileSync } from "fs-extra";
 import { findEdges } from "../shared/findEdges";
 import path from "path";
 import { makeImportPath } from "./fixImports/makeImportPath";
-import { customResolve } from "../shared/customResolve";
+import { customResolve, canResolve } from "../shared/customResolve";
 import { RootOption } from "../shared/RootOption";
+import logger from "../../shared/logger";
 
 const getNewFilePath = (file: string, rootOptions: RootOption[]) => {
   for (const { tree, parentFolder } of rootOptions) {
@@ -49,6 +50,10 @@ export const fixImports = (filePaths: string[], rootOptions: RootOption[]) => {
 
     let newText = ogText.repeat(1);
     for (const imp of imports) {
+      if (!canResolve(imp[1], basedir)) {
+        logger.error(`Cannot find import ${imp[1]}`);
+        continue;
+      }
       const absPath = customResolve(imp[1], basedir);
       const newImportText = getNewImportPath(absPath, newFilePath, rootOptions);
 

src/index/generateTrees/buildGraph.ts

@@ -2,8 +2,9 @@ import path from "path";
 import { findEdges } from "../shared/findEdges";
 import { Graph, OldGraph } from "./shared/Graph";
 import { findSharedParent } from "./shared/findSharedParent";
-import { customResolve } from "../shared/customResolve";
+import { customResolve, canResolve } from "../shared/customResolve";
 import { addEdgeToGraph } from "./buildGraph/addEdge";
+import logger from "../../shared/logger";
 
 export function buildGraph(files: string[]) {
   const parentFolder = findSharedParent(files);
@@ -26,6 +27,11 @@ export function buildGraph(files: string[]) {
     }
     totalFiles.push(start);
     findEdges(file).forEach(edge => {
+      if (!canResolve(edge[1], path.dirname(edge[0]))) {
+        logger.error(`Cannot find import ${edge[1]}`);
+        return;
+      }
+
       if (edge[1].includes("/")) {
         numForwardSlashes++;
       } else if (edge[1].includes("\\")) {

src/index/shared/customResolve.ts

@@ -1,9 +1,27 @@
 import resolve from "resolve";
 
+const extensions = [
+  ".js",
+  ".jsx",
+  ".json",
+  ".sass",
+  ".scss",
+  ".svg",
+  ".ts",
+  ".tsx",
+];
+
+/** Checks if the file exists */
+export const canResolve = (id: string, basedir: string) => {
+  try {
+    resolve.sync(id, { basedir, extensions });
+    return true;
+  } catch (err) {
+    return false;
+  }
+};
+
 /** Resolve with a list of predefined extensions. */
 export const customResolve = (id: string, basedir: string) => {
-  return resolve.sync(id, {
-    basedir,
-    extensions: [".js", ".jsx", ".sass", ".scss", ".svg", ".ts", ".tsx"],
-  });
+  return resolve.sync(id, { basedir, extensions });
 };

tests/__snapshots__/end-to-end.test.ts.snap

@@ -58,6 +58,7 @@ exports[`end-to-end cra: cra/index/App.js 1`] = `
 "import React from \\"react\\";
 import logo from \\"./App/logo.svg\\";
 import \\"./App/App.css\\";
+import \\"./non-existent-file\\";
 
 function App() {
   return (

tests/fixtures/cra/App.js

@@ -1,6 +1,7 @@
 import React from "react";
 import logo from "./logo.svg";
 import "./App.css";
+import "./non-existent-file";
 
 function App() {
   return (