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refactor: don't merge asars that are identical in the x64 and arm64 versions #68

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123 changes: 62 additions & 61 deletions src/index.ts
Original file line number Diff line number Diff line change
Expand Up @@ -41,7 +41,7 @@ export type MakeUniversalOpts = {
*/
singleArchFiles?: string;
/**
* Minimatch pattern of binaries that are expected to be the same x64 binary in both of the ASAR files.
* Minimatch pattern of binaries that are expected to be the same x64 binary in both of the application files.
*/
x64ArchFiles?: string;
};
Expand Down Expand Up @@ -215,7 +215,6 @@ export const makeUniversalApp = async (opts: MakeUniversalOpts): Promise<void> =
}

const generatedIntegrity: Record<string, { algorithm: 'SHA256'; hash: string }> = {};
let didSplitAsar = false;

/**
* If we have an ASAR we just need to check if the two "app.asar" files have the same hash,
Expand All @@ -225,77 +224,79 @@ export const makeUniversalApp = async (opts: MakeUniversalOpts): Promise<void> =
* look at codifying that assumption as actual logic.
*/
// FIXME: Codify the assumption that app.asar.unpacked only contains native modules
if (x64AsarMode === AsarMode.HAS_ASAR && opts.mergeASARs) {
d('merging x64 and arm64 asars');
const output = path.resolve(tmpApp, 'Contents', 'Resources', 'app.asar');
await mergeASARs({
x64AsarPath: path.resolve(tmpApp, 'Contents', 'Resources', 'app.asar'),
arm64AsarPath: path.resolve(opts.arm64AppPath, 'Contents', 'Resources', 'app.asar'),
outputAsarPath: output,
singleArchFiles: opts.singleArchFiles,
});

generatedIntegrity['Resources/app.asar'] = generateAsarIntegrity(output);
} else if (x64AsarMode === AsarMode.HAS_ASAR) {
if (x64AsarMode === AsarMode.HAS_ASAR) {
d('checking if the x64 and arm64 asars are identical');
const x64AsarSha = await sha(path.resolve(tmpApp, 'Contents', 'Resources', 'app.asar'));
const arm64AsarSha = await sha(
path.resolve(opts.arm64AppPath, 'Contents', 'Resources', 'app.asar'),
);

if (x64AsarSha !== arm64AsarSha) {
didSplitAsar = true;
d('x64 and arm64 asars are different');
const x64AsarPath = path.resolve(tmpApp, 'Contents', 'Resources', 'app-x64.asar');
await fs.move(path.resolve(tmpApp, 'Contents', 'Resources', 'app.asar'), x64AsarPath);
const x64Unpacked = path.resolve(tmpApp, 'Contents', 'Resources', 'app.asar.unpacked');
if (await fs.pathExists(x64Unpacked)) {
await fs.move(
x64Unpacked,
path.resolve(tmpApp, 'Contents', 'Resources', 'app-x64.asar.unpacked'),
if (opts.mergeASARs) {
d('merging x64 and arm64 asars');
const output = path.resolve(tmpApp, 'Contents', 'Resources', 'app.asar');
await mergeASARs({
x64AsarPath: path.resolve(tmpApp, 'Contents', 'Resources', 'app.asar'),
arm64AsarPath: path.resolve(opts.arm64AppPath, 'Contents', 'Resources', 'app.asar'),
outputAsarPath: output,
singleArchFiles: opts.singleArchFiles,
});

generatedIntegrity['Resources/app.asar'] = generateAsarIntegrity(output);
} else {
d('splitting x64 and arm64 asars');
const x64AsarPath = path.resolve(tmpApp, 'Contents', 'Resources', 'app-x64.asar');
await fs.move(path.resolve(tmpApp, 'Contents', 'Resources', 'app.asar'), x64AsarPath);
const x64Unpacked = path.resolve(tmpApp, 'Contents', 'Resources', 'app.asar.unpacked');
if (await fs.pathExists(x64Unpacked)) {
await fs.move(
x64Unpacked,
path.resolve(tmpApp, 'Contents', 'Resources', 'app-x64.asar.unpacked'),
);
}

const arm64AsarPath = path.resolve(tmpApp, 'Contents', 'Resources', 'app-arm64.asar');
await fs.copy(
path.resolve(opts.arm64AppPath, 'Contents', 'Resources', 'app.asar'),
arm64AsarPath,
);
}

const arm64AsarPath = path.resolve(tmpApp, 'Contents', 'Resources', 'app-arm64.asar');
await fs.copy(
path.resolve(opts.arm64AppPath, 'Contents', 'Resources', 'app.asar'),
arm64AsarPath,
);
const arm64Unpacked = path.resolve(
opts.arm64AppPath,
'Contents',
'Resources',
'app.asar.unpacked',
);
if (await fs.pathExists(arm64Unpacked)) {
const arm64Unpacked = path.resolve(
opts.arm64AppPath,
'Contents',
'Resources',
'app.asar.unpacked',
);
if (await fs.pathExists(arm64Unpacked)) {
await fs.copy(
arm64Unpacked,
path.resolve(tmpApp, 'Contents', 'Resources', 'app-arm64.asar.unpacked'),
);
}

const entryAsar = path.resolve(tmpDir, 'entry-asar');
await fs.mkdir(entryAsar);
await fs.copy(
arm64Unpacked,
path.resolve(tmpApp, 'Contents', 'Resources', 'app-arm64.asar.unpacked'),
path.resolve(__dirname, '..', '..', 'entry-asar', 'has-asar.js'),
path.resolve(entryAsar, 'index.js'),
);
let pj = JSON.parse(
asar
.extractFile(
path.resolve(opts.x64AppPath, 'Contents', 'Resources', 'app.asar'),
'package.json',
)
.toString('utf8'),
);
pj.main = 'index.js';
await fs.writeJson(path.resolve(entryAsar, 'package.json'), pj);
const asarPath = path.resolve(tmpApp, 'Contents', 'Resources', 'app.asar');
await asar.createPackage(entryAsar, asarPath);

generatedIntegrity['Resources/app.asar'] = generateAsarIntegrity(asarPath);
generatedIntegrity['Resources/app-x64.asar'] = generateAsarIntegrity(x64AsarPath);
generatedIntegrity['Resources/app-arm64.asar'] = generateAsarIntegrity(arm64AsarPath);
}

const entryAsar = path.resolve(tmpDir, 'entry-asar');
await fs.mkdir(entryAsar);
await fs.copy(
path.resolve(__dirname, '..', '..', 'entry-asar', 'has-asar.js'),
path.resolve(entryAsar, 'index.js'),
);
let pj = JSON.parse(
(
await asar.extractFile(
path.resolve(opts.x64AppPath, 'Contents', 'Resources', 'app.asar'),
'package.json',
)
).toString('utf8'),
);
pj.main = 'index.js';
await fs.writeJson(path.resolve(entryAsar, 'package.json'), pj);
const asarPath = path.resolve(tmpApp, 'Contents', 'Resources', 'app.asar');
await asar.createPackage(entryAsar, asarPath);

generatedIntegrity['Resources/app.asar'] = generateAsarIntegrity(asarPath);
generatedIntegrity['Resources/app-x64.asar'] = generateAsarIntegrity(x64AsarPath);
generatedIntegrity['Resources/app-arm64.asar'] = generateAsarIntegrity(arm64AsarPath);
} else {
d('x64 and arm64 asars are the same');
generatedIntegrity['Resources/app.asar'] = generateAsarIntegrity(
Expand Down