electron/script/gn-asar.js

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const asar = require('asar')
const assert = require('assert')
const fs = require('fs-extra')
const os = require('os')
const path = require('path')
const getArgGroup = (name) => {
const group = []
let inGroup = false
for (const arg of process.argv) {
// At the next flag we stop being in the current group
if (arg.startsWith('--')) inGroup = false
// Push all args in the group
if (inGroup) group.push(arg)
// If we find the start flag, start pushing
if (arg === `--${name}`) inGroup = true
}
return group
}
const base = getArgGroup('base')
const files = getArgGroup('files')
const out = getArgGroup('out')
assert(base.length === 1, 'should have a single base dir')
assert(files.length >= 1, 'should have at least one input file')
assert(out.length === 1, 'should have a single out path')
// Ensure all files are inside the base dir
for (const file of files) {
if (!file.startsWith(base[0])) {
console.error(`Expected all files to be inside the base dir but "${file}" was not in "${base[0]}"`)
process.exit(1)
}
}
const tmpPath = fs.mkdtempSync(path.resolve(os.tmpdir(), 'electron-gn-asar-'))
try {
// Copy all files to a tmp dir to avoid including scrap files in the ASAR
for (const file of files) {
const newLocation = path.resolve(tmpPath, path.relative(base[0], file))
fs.mkdirsSync(path.dirname(newLocation))
fs.writeFileSync(newLocation, fs.readFileSync(file))
}
} catch (err) {
console.error('Unexpected error while generating ASAR', err)
fs.removeSync(tmpPath)
process.exit(1)
}
// Create the ASAR archive
asar.createPackageWithOptions(tmpPath, out[0], {})
.catch(err => {
fs.removeSync(tmpPath)
console.error('Unexpected error while generating ASAR', err)
process.exit(1)
}).then(() => fs.remove(tmpPath))