| 1 | const fs = require('fs-extra');
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| 2 | const path = require('path');
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| 3 |
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| 4 | const resolveImportPathExtensions = (filePath) => {
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| 5 | return {
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| 6 | visitor: {
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| 7 | 'ImportDeclaration|ExportNamedDeclaration|ExportAllDeclaration': (path) => {
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| 8 | if (path.node.source) {
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| 9 | path.node.source.value =
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| 10 | checkForExtension(filePath, path.node.source.value, '.mjs') ||
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| 11 | checkForExtension(filePath, path.node.source.value, '.js') ||
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| 12 | checkForExtension(filePath, path.node.source.value, '.ts') ||
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| 13 | checkForExtension(filePath, path.node.source.value, '.jsx') ||
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| 14 | checkForExtension(filePath, path.node.source.value, '.tsx');
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| 15 | }
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| 16 | }
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| 17 | }
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| 18 | };
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| 19 | };
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| 20 |
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| 21 | module.exports = resolveImportPathExtensions;
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| 22 |
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| 23 | function checkForExtension(filePath, importPath, extension) {
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| 24 | const filePathDirectory = filePath.slice(0, filePath.lastIndexOf('/') + 1);
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| 25 | const absolutePath = path.resolve(path.join(filePathDirectory, importPath));
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| 26 |
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| 27 | if (hasExtension(importPath, extension)) {
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| 28 | return importPath;
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| 29 | }
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| 30 | else if (fs.existsSync(`${absolutePath}${extension}`)) {
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| 31 | return `${importPath}${extension}`;
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| 32 | }
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| 33 | else if (fs.existsSync(`${absolutePath}/index.mjs`)) {
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| 34 | return `${importPath}/index.mjs`;
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| 35 | }
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| 36 | else if ((fs.existsSync(`${absolutePath}/index.js`))) {
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| 37 | return `${importPath}/index.js`;
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| 38 | }
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| 39 | else if ((fs.existsSync(`${absolutePath}/index.ts`))) {
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| 40 | return `${importPath}/index.ts`;
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| 41 | }
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| 42 | else if ((fs.existsSync(`${absolutePath}/index.jsx`))) {
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| 43 | return `${importPath}/index.jsx`;
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| 44 | }
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| 45 | else if ((fs.existsSync(`${absolutePath}/index.tsx`))) {
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| 46 | return `${importPath}/index.tsx`;
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| 47 | }
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| 48 |
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| 49 | return null;
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| 50 | }
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| 51 |
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| 52 | function hasExtension(path, extension) {
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| 53 | const pathBackward = backwardsify(path);
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| 54 | const extensionBackward = backwardsify(extension);
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| 55 |
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| 56 | return pathBackward.indexOf(extensionBackward) === 0;
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| 57 | }
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| 58 |
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| 59 | function backwardsify(theString) {
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| 60 | return theString.split('').reverse().join('');
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| 61 | }
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