expo-updates
Version:
Fetches and manages remotely-hosted assets and updates to your app's JS bundle.
151 lines (132 loc) • 5.23 kB
JavaScript
const { loadAsync } = require('@expo/metro-config');
const fs = require('fs');
const Server = require('metro/src/Server');
const path = require('path');
const { v4: uuidv4 } = require('uuid');
const filterPlatformAssetScales = require('./filterPlatformAssetScales');
(async function() {
const platform = process.argv[2];
const possibleProjectRoot = process.argv[3];
const destinationDir = process.argv[4];
const entryFile = process.env.ENTRY_FILE || 'index.js';
// Remove projectRoot validation when we no longer support React Native <= 62
let projectRoot;
if (fs.existsSync(path.join(possibleProjectRoot, entryFile))) {
projectRoot = possibleProjectRoot;
} else if (fs.existsSync(path.join(possibleProjectRoot, '..', entryFile))) {
projectRoot = path.resolve(possibleProjectRoot, '..');
}
let metroConfig;
try {
metroConfig = await loadAsync(projectRoot);
} catch (e) {
let message = `Error loading Metro config and Expo app config: ${e.message}\n\nMake sure your project is configured properly and your app.json / app.config.js is valid.`;
if (process.env.EAS_BUILD) {
message +=
'\nIf you are using environment variables in app.config.js, verify that you have set them in your EAS Build profile configuration or secrets.';
}
throw new Error(message);
}
let assets;
try {
assets = await fetchAssetManifestAsync(platform, projectRoot, entryFile, metroConfig);
} catch (e) {
throw new Error(
"Error loading assets JSON from Metro. Ensure you've followed all expo-updates installation steps correctly. " +
e.message
);
}
const manifest = {
id: uuidv4(),
commitTime: new Date().getTime(),
assets: [],
};
assets.forEach(function(asset) {
if (!asset.fileHashes) {
throw new Error(
'The hashAssetFiles Metro plugin is not configured. You need to add a metro.config.js to your project that configures Metro to use this plugin. See https://github.com/expo/expo/blob/master/packages/expo-updates/README.md#metroconfigjs for an example.'
);
}
filterPlatformAssetScales(platform, asset.scales).forEach(function(scale, index) {
const assetInfoForManifest = {
name: asset.name,
type: asset.type,
scale,
packagerHash: asset.fileHashes[index],
subdirectory: asset.httpServerLocation,
};
if (platform === 'ios') {
assetInfoForManifest.nsBundleDir = getIosDestinationDir(asset);
assetInfoForManifest.nsBundleFilename =
scale === 1 ? asset.name : asset.name + '@' + scale + 'x';
} else if (platform === 'android') {
assetInfoForManifest.scales = asset.scales;
assetInfoForManifest.resourcesFilename = getAndroidResourceIdentifier(asset);
assetInfoForManifest.resourcesFolder = getAndroidResourceFolderName(asset);
}
manifest.assets.push(assetInfoForManifest);
});
});
fs.writeFileSync(path.join(destinationDir, 'app.manifest'), JSON.stringify(manifest));
})().catch(e => {
// Wrap in regex to make it easier for log parsers (like `@expo/xcpretty`) to find this error.
e.message = `@build-script-error-begin\n${e.message}\n@build-script-error-end\n`;
console.error(e);
process.exit(1);
});
// See https://developer.android.com/guide/topics/resources/drawable-resource.html
const drawableFileTypes = new Set(['gif', 'jpeg', 'jpg', 'png', 'svg', 'webp', 'xml']);
function getAndroidResourceFolderName(asset) {
return drawableFileTypes.has(asset.type) ? 'drawable' : 'raw';
}
// copied from react-native/Libraries/Image/assetPathUtils.js
function getAndroidResourceIdentifier(asset) {
const folderPath = getBasePath(asset);
return (folderPath + '/' + asset.name)
.toLowerCase()
.replace(/\//g, '_') // Encode folder structure in file name
.replace(/([^a-z0-9_])/g, '') // Remove illegal chars
.replace(/^assets_/, ''); // Remove "assets_" prefix
}
function getIosDestinationDir(asset) {
// react-native-cli replaces `..` with `_` when embedding assets in the iOS app bundle
// https://github.com/react-native-community/cli/blob/0a93be1a42ed1fb05bb0ebf3b82d58b2dd920614/packages/cli/src/commands/bundle/getAssetDestPathIOS.ts
return getBasePath(asset).replace(/\.\.\//g, '_');
}
// copied from react-native/Libraries/Image/assetPathUtils.js
function getBasePath(asset) {
let basePath = asset.httpServerLocation;
if (basePath[0] === '/') {
basePath = basePath.substr(1);
}
return basePath;
}
// Spawn a Metro server to get the asset manifest
async function fetchAssetManifestAsync(platform, projectRoot, entryFile, metroConfig) {
// Project-level babel config does not load unless we change to the
// projectRoot before instantiating the server
process.chdir(projectRoot);
const server = new Server(metroConfig);
const requestOpts = {
entryFile,
dev: false,
minify: false,
platform,
};
let assetManifest;
let error;
try {
assetManifest = await server.getAssets({
...Server.DEFAULT_BUNDLE_OPTIONS,
...requestOpts,
});
} catch (e) {
error = e;
} finally {
server.end();
}
if (error) {
throw error;
}
return assetManifest;
}