| 47 | * Modifies an existing babel.config.js file to add the unistyles plugin |
| 48 | */ |
| 49 | export async function addUnistylesToBabelConfig( |
| 50 | targetPath: string, |
| 51 | rootFolder: string |
| 52 | ): Promise<boolean> { |
| 53 | const babelConfigPath = path.join(targetPath, "babel.config.js"); |
| 54 | |
| 55 | try { |
| 56 | const content = await fs.readFile(babelConfigPath, "utf8"); |
| 57 | |
| 58 | // Check if unistyles plugin is already configured |
| 59 | if (content.includes(UNISTYLES_PLUGIN)) { |
| 60 | return false; // Already configured |
| 61 | } |
| 62 | |
| 63 | // Parse the babel config to understand its structure |
| 64 | // This is a simplified approach - we'll try to add the plugin to the plugins array |
| 65 | |
| 66 | // Look for plugins array - handle both single and multi-line formats |
| 67 | const pluginsRegex = /plugins\s*:\s*\[([^\]]*)\]/s; |
| 68 | const pluginsMatch = content.match(pluginsRegex); |
| 69 | |
| 70 | const unistylesPluginConfig = `[ |
| 71 | '${UNISTYLES_PLUGIN}', |
| 72 | { |
| 73 | // pass root folder of your application |
| 74 | // all files under this folder will be processed by the Babel plugin |
| 75 | root: '${rootFolder}', |
| 76 | }, |
| 77 | ]`; |
| 78 | |
| 79 | if (pluginsMatch) { |
| 80 | // Plugins array exists, add our plugin to it |
| 81 | const existingPlugins = pluginsMatch[1].trim(); |
| 82 | |
| 83 | let newPluginsContent: string; |
| 84 | if (existingPlugins === "") { |
| 85 | // Empty plugins array |
| 86 | newPluginsContent = `\n ${unistylesPluginConfig}\n `; |
| 87 | } else { |
| 88 | // Has existing plugins, add ours with a comma |
| 89 | newPluginsContent = `${existingPlugins},\n ${unistylesPluginConfig}`; |
| 90 | } |
| 91 | |
| 92 | const newContent = content.replace( |
| 93 | pluginsRegex, |
| 94 | `plugins: [${newPluginsContent}]` |
| 95 | ); |
| 96 | |
| 97 | await fs.writeFile(babelConfigPath, newContent, "utf8"); |
| 98 | return true; |
| 99 | } else { |
| 100 | // No plugins array found, add one |
| 101 | // Look for the return statement and its closing brace |
| 102 | const returnObjectRegex = /(return\s*\{)([\s\S]*?)(\n\s*})/; |
| 103 | const returnMatch = content.match(returnObjectRegex); |
| 104 | |
| 105 | if (returnMatch) { |
| 106 | const returnStart = returnMatch[1]; // "return {" |