babel-preset-expo
Version:
The Babel preset for Expo projects
70 lines (69 loc) • 3.18 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.expoRouterBabelPlugin = expoRouterBabelPlugin;
/**
* Copyright © 2024 650 Industries.
*/
const core_1 = require("@babel/core");
const node_path_1 = __importDefault(require("node:path"));
const resolve_from_1 = __importDefault(require("resolve-from"));
const common_1 = require("./common");
const debug = require('debug')('expo:babel:router');
function getExpoRouterAppRoot(projectRoot, appFolder) {
// TODO: We should have cache invalidation if the expo-router/entry file location changes.
const routerEntry = (0, resolve_from_1.default)(projectRoot, 'expo-router/entry');
const appRoot = node_path_1.default.relative(node_path_1.default.dirname(routerEntry), appFolder);
debug('routerEntry', routerEntry, appFolder, appRoot);
return appRoot;
}
/**
* Inlines environment variables to configure the process:
*
* EXPO_PROJECT_ROOT
* EXPO_ROUTER_ABS_APP_ROOT
* EXPO_ROUTER_APP_ROOT
* EXPO_ROUTER_IMPORT_MODE
*/
function expoRouterBabelPlugin(api) {
const { types: t } = api;
const possibleProjectRoot = api.caller(common_1.getPossibleProjectRoot);
const asyncRoutes = api.caller(common_1.getAsyncRoutes);
const routerAbsoluteRoot = api.caller(common_1.getExpoRouterAbsoluteAppRoot);
function isFirstInAssign(path) {
return core_1.types.isAssignmentExpression(path.parent) && path.parent.left === path.node;
}
return {
name: 'expo-router',
visitor: {
MemberExpression(path, state) {
const projectRoot = possibleProjectRoot || state.file.opts.root || '';
if (path.get('object').matchesPattern('process.env')) {
const key = path.toComputedKey();
if (t.isStringLiteral(key) && !isFirstInAssign(path)) {
// Used for log box on web.
if (key.value.startsWith('EXPO_PROJECT_ROOT')) {
path.replaceWith(t.stringLiteral(projectRoot));
}
else if (key.value.startsWith('EXPO_ROUTER_IMPORT_MODE')) {
path.replaceWith(t.stringLiteral(asyncRoutes ? 'lazy' : 'sync'));
}
if (
// Skip loading the app root in tests.
// This is handled by the testing-library utils
process.env.NODE_ENV !== 'test') {
if (key.value.startsWith('EXPO_ROUTER_ABS_APP_ROOT')) {
path.replaceWith(t.stringLiteral(routerAbsoluteRoot));
}
else if (key.value.startsWith('EXPO_ROUTER_APP_ROOT')) {
path.replaceWith(t.stringLiteral(getExpoRouterAppRoot(projectRoot, routerAbsoluteRoot)));
}
}
}
}
},
},
};
}