Update gitignore (sorry)

electron/node_modules/asar/lib/disk.js

@@ -0,0 +1,123 @@
+'use strict'
+
+const fs = require('./wrapped-fs')
+const path = require('path')
+const pickle = require('chromium-pickle-js')
+
+const Filesystem = require('./filesystem')
+let filesystemCache = {}
+
+async function copyFile (dest, src, filename) {
+  const srcFile = path.join(src, filename)
+  const targetFile = path.join(dest, filename)
+
+  const [content, stats] = await Promise.all([fs.readFile(srcFile), fs.stat(srcFile), fs.mkdirp(path.dirname(targetFile))])
+  return fs.writeFile(targetFile, content, { mode: stats.mode })
+}
+
+async function streamTransformedFile (originalFilename, outStream, transformed) {
+  return new Promise((resolve, reject) => {
+    const stream = fs.createReadStream(transformed ? transformed.path : originalFilename)
+    stream.pipe(outStream, { end: false })
+    stream.on('error', reject)
+    stream.on('end', () => resolve())
+  })
+}
+
+const writeFileListToStream = async function (dest, filesystem, out, list, metadata) {
+  for (const file of list) {
+    if (file.unpack) { // the file should not be packed into archive
+      const filename = path.relative(filesystem.src, file.filename)
+      await copyFile(`${dest}.unpacked`, filesystem.src, filename)
+    } else {
+      await streamTransformedFile(file.filename, out, metadata[file.filename].transformed)
+    }
+  }
+  return out.end()
+}
+
+module.exports.writeFilesystem = async function (dest, filesystem, files, metadata) {
+  const headerPickle = pickle.createEmpty()
+  headerPickle.writeString(JSON.stringify(filesystem.header))
+  const headerBuf = headerPickle.toBuffer()
+
+  const sizePickle = pickle.createEmpty()
+  sizePickle.writeUInt32(headerBuf.length)
+  const sizeBuf = sizePickle.toBuffer()
+
+  const out = fs.createWriteStream(dest)
+  await new Promise((resolve, reject) => {
+    out.on('error', reject)
+    out.write(sizeBuf)
+    return out.write(headerBuf, () => resolve())
+  })
+  return writeFileListToStream(dest, filesystem, out, files, metadata)
+}
+
+module.exports.readArchiveHeaderSync = function (archive) {
+  const fd = fs.openSync(archive, 'r')
+  let size
+  let headerBuf
+  try {
+    const sizeBuf = Buffer.alloc(8)
+    if (fs.readSync(fd, sizeBuf, 0, 8, null) !== 8) {
+      throw new Error('Unable to read header size')
+    }
+
+    const sizePickle = pickle.createFromBuffer(sizeBuf)
+    size = sizePickle.createIterator().readUInt32()
+    headerBuf = Buffer.alloc(size)
+    if (fs.readSync(fd, headerBuf, 0, size, null) !== size) {
+      throw new Error('Unable to read header')
+    }
+  } finally {
+    fs.closeSync(fd)
+  }
+
+  const headerPickle = pickle.createFromBuffer(headerBuf)
+  const header = headerPickle.createIterator().readString()
+  return { headerString: header, header: JSON.parse(header), headerSize: size }
+}
+
+module.exports.readFilesystemSync = function (archive) {
+  if (!filesystemCache[archive]) {
+    const header = this.readArchiveHeaderSync(archive)
+    const filesystem = new Filesystem(archive)
+    filesystem.header = header.header
+    filesystem.headerSize = header.headerSize
+    filesystemCache[archive] = filesystem
+  }
+  return filesystemCache[archive]
+}
+
+module.exports.uncacheFilesystem = function (archive) {
+  if (filesystemCache[archive]) {
+    filesystemCache[archive] = undefined
+    return true
+  }
+  return false
+}
+
+module.exports.uncacheAll = function () {
+  filesystemCache = {}
+}
+
+module.exports.readFileSync = function (filesystem, filename, info) {
+  let buffer = Buffer.alloc(info.size)
+  if (info.size <= 0) { return buffer }
+  if (info.unpacked) {
+    // it's an unpacked file, copy it.
+    buffer = fs.readFileSync(path.join(`${filesystem.src}.unpacked`, filename))
+  } else {
+    // Node throws an exception when reading 0 bytes into a 0-size buffer,
+    // so we short-circuit the read in this case.
+    const fd = fs.openSync(filesystem.src, 'r')
+    try {
+      const offset = 8 + filesystem.headerSize + parseInt(info.offset)
+      fs.readSync(fd, buffer, 0, info.size, offset)
+    } finally {
+      fs.closeSync(fd)
+    }
+  }
+  return buffer
+}