fix: 🐛 add more meaningful log to importAny

src/autoProcess.ts

@@ -7,8 +7,7 @@ import {
   Transformers,
   Options,
 } from './types';
-import { hasDepInstalled } from './modules/hasDepInstalled';
-import { concat } from './modules/concat';
+import { hasDepInstalled, concat } from './modules/utils';
 import { getTagInfo } from './modules/tagInfo';
 import {
   addLanguageAlias,

src/modules/utils.ts

@@ -0,0 +1,58 @@
+import { dirname } from 'path';
+
+export async function importAny(...modules: string[]) {
+  try {
+    const mod = await modules.reduce(
+      (acc, moduleName) => acc.catch(() => import(moduleName)),
+      Promise.reject(),
+    );
+
+    return mod;
+  } catch (e) {
+    throw new Error(`Cannot find any of modules: ${modules}\n\n${e}`);
+  }
+}
+
+export function concat(...arrs: any[]): any[] {
+  return arrs.reduce((acc: [], a) => {
+    if (a) {
+      return acc.concat(a);
+    }
+
+    return acc;
+  }, []);
+}
+
+/** Paths used by preprocessors to resolve @imports */
+export function getIncludePaths(fromFilename: string, base: string[] = []) {
+  return [
+    ...new Set([...base, 'node_modules', process.cwd(), dirname(fromFilename)]),
+  ];
+}
+
+const cachedResult: Record<string, boolean> = {};
+
+/**
+ * Checks if a package is installed.
+ *
+ * @export
+ * @param {string} dep
+ * @returns boolean
+ */
+export async function hasDepInstalled(dep: string) {
+  if (cachedResult[dep] != null) {
+    return cachedResult[dep];
+  }
+
+  let result = false;
+
+  try {
+    await import(dep);
+
+    result = true;
+  } catch (e) {
+    result = false;
+  }
+
+  return (cachedResult[dep] = result);
+}

src/processors/babel.ts

@@ -1,5 +1,5 @@
 import { PreprocessorGroup, Options } from '../types';
-import { concat } from '../modules/concat';
+import { concat } from '../modules/utils';
 import { getTagInfo } from '../modules/tagInfo';
 import { prepareContent } from '../modules/prepareContent';
 

src/processors/coffeescript.ts

@@ -1,6 +1,6 @@
 import { PreprocessorGroup, Options } from '../types';
 import { getTagInfo } from '../modules/tagInfo';
-import { concat } from '../modules/concat';
+import { concat } from '../modules/utils';
 import { prepareContent } from '../modules/prepareContent';
 
 export default (options?: Options.Coffeescript): PreprocessorGroup => ({

src/processors/less.ts

@@ -1,6 +1,6 @@
 import { PreprocessorGroup, Options } from '../types';
 import { getTagInfo } from '../modules/tagInfo';
-import { concat } from '../modules/concat';
+import { concat } from '../modules/utils';
 import { prepareContent } from '../modules/prepareContent';
 
 export default (options?: Options.Less): PreprocessorGroup => ({

src/processors/postcss.ts

@@ -1,6 +1,6 @@
 import { PreprocessorGroup, Options } from '../types';
 import { getTagInfo } from '../modules/tagInfo';
-import { concat } from '../modules/concat';
+import { concat } from '../modules/utils';
 import { prepareContent } from '../modules/prepareContent';
 
 /** Adapted from https://github.com/TehShrike/svelte-preprocess-postcss */

src/processors/scss.ts

@@ -1,6 +1,6 @@
 import { PreprocessorGroup, Options } from '../types';
 import { getTagInfo } from '../modules/tagInfo';
-import { concat } from '../modules/concat';
+import { concat } from '../modules/utils';
 import { prepareContent } from '../modules/prepareContent';
 
 export default (options?: Options.Sass): PreprocessorGroup => ({

src/processors/stylus.ts

@@ -1,6 +1,6 @@
 import { Options, PreprocessorGroup } from '../types';
 import { getTagInfo } from '../modules/tagInfo';
-import { concat } from '../modules/concat';
+import { concat } from '../modules/utils';
 import { prepareContent } from '../modules/prepareContent';
 
 export default (options?: Options.Stylus): PreprocessorGroup => ({

src/processors/typescript.ts

@@ -1,6 +1,6 @@
 import { Options, PreprocessorGroup } from '../types';
 import { getTagInfo } from '../modules/tagInfo';
-import { concat } from '../modules/concat';
+import { concat } from '../modules/utils';
 import { prepareContent } from '../modules/prepareContent';
 
 export default (options?: Options.Typescript): PreprocessorGroup => ({

src/transformers/less.ts

@@ -1,6 +1,6 @@
 import less from 'less';
 
-import { getIncludePaths } from '../modules/getIncludePaths';
+import { getIncludePaths } from '../modules/utils';
 import { Transformer, Options } from '../types';
 
 const transformer: Transformer<Options.Less> = async ({

src/transformers/scss.ts

@@ -1,8 +1,7 @@
 import { Result } from 'sass';
 
 import { Transformer, Processed, Options } from '../types';
-import { getIncludePaths } from '../modules/getIncludePaths';
-import { importAny } from '../modules/importAny';
+import { getIncludePaths, importAny } from '../modules/utils';
 
 let sass: Options.Sass['implementation'];
 

src/transformers/stylus.ts

@@ -2,7 +2,7 @@ import path from 'path';
 
 import stylus from 'stylus';
 
-import { getIncludePaths } from '../modules/getIncludePaths';
+import { getIncludePaths } from '../modules/utils';
 import { Transformer, Options } from '../types';
 
 const transformer: Transformer<Options.Stylus> = ({

test/modules.test.ts

@@ -2,10 +2,12 @@ import { resolve } from 'path';
 
 import { getTestAppFilename, getFixtureContent } from './utils';
 import { getTagInfo } from '../src/modules/tagInfo';
-import { importAny } from '../src/modules/importAny';
-import { getIncludePaths } from '../src/modules/getIncludePaths';
+import {
+  importAny,
+  getIncludePaths,
+  hasDepInstalled,
+} from '../src/modules/utils';
 import { globalifySelector } from '../src/modules/globalifySelector';
-import { hasDepInstalled } from '../src/modules/hasDepInstalled';
 
 describe('importAny', () => {
   it('should throw error when none exist', () => {