balena-cli/lib/utils/qemu.js
Pagan Gazzard 9f59b6dde5 Convert lib/utils/qemu.coffee to javascript
Change-type: patch
2020-04-24 10:20:15 +01:00

129 lines
3.5 KiB
JavaScript

/**
* @license
* Copyright 2017-2020 Balena Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import * as Promise from 'bluebird';
import { getBalenaSdk } from './lazy';
export const QEMU_VERSION = 'v4.0.0-balena';
export const QEMU_BIN_NAME = 'qemu-execve';
export function qemuPathInContext(context) {
const path = require('path');
const binDir = path.join(context, '.balena');
const binPath = path.join(binDir, QEMU_BIN_NAME);
return path.relative(context, binPath);
}
export function copyQemu(context, arch) {
const path = require('path');
const fs = require('mz/fs');
// Create a hidden directory in the build context, containing qemu
const binDir = path.join(context, '.balena');
const binPath = path.join(binDir, QEMU_BIN_NAME);
return Promise.resolve(fs.mkdir(binDir))
.catch({ code: 'EEXIST' }, function() {
// noop
})
.then(() => getQemuPath(arch))
.then(
qemu =>
new Promise(function(resolve, reject) {
const read = fs.createReadStream(qemu);
const write = fs.createWriteStream(binPath);
read
.on('error', reject)
.pipe(write)
.on('error', reject)
.on('finish', resolve);
}),
)
.then(() => fs.chmod(binPath, '755'))
.then(() => path.relative(context, binPath));
}
export const getQemuPath = function(arch) {
const balena = getBalenaSdk();
const path = require('path');
const fs = require('mz/fs');
return balena.settings.get('binDirectory').then(binDir =>
Promise.resolve(fs.mkdir(binDir))
.catch({ code: 'EEXIST' }, function() {
// noop
})
.then(() =>
path.join(binDir, `${QEMU_BIN_NAME}-${arch}-${QEMU_VERSION}`),
),
);
};
export function installQemu(arch) {
const request = require('request');
const fs = require('fs');
const zlib = require('zlib');
const tar = require('tar-stream');
return getQemuPath(arch).then(
qemuPath =>
new Promise(function(resolve, reject) {
const installStream = fs.createWriteStream(qemuPath);
const qemuArch = balenaArchToQemuArch(arch);
const downloadArchiveName = `qemu-${QEMU_VERSION.replace(
/^v/,
'',
)}-${qemuArch}.tar.gz`;
const qemuUrl = `https://github.com/balena-io/qemu/releases/download/${QEMU_VERSION}/${downloadArchiveName}`;
const extract = tar.extract();
extract.on('entry', function(header, stream, next) {
stream.on('end', next);
if (header.name.includes(`qemu-${qemuArch}-static`)) {
stream.pipe(installStream);
} else {
stream.resume();
}
});
return request(qemuUrl)
.on('error', reject)
.pipe(zlib.createGunzip())
.on('error', reject)
.pipe(extract)
.on('error', reject)
.on('finish', function() {
fs.chmodSync(qemuPath, '755');
resolve();
});
}),
);
}
var balenaArchToQemuArch = function(arch) {
switch (arch) {
case 'armv7hf':
case 'rpi':
case 'armhf':
return 'arm';
case 'aarch64':
return 'aarch64';
default:
throw new Error(`Cannot install emulator for architecture ${arch}`);
}
};