317 lines
9.2 KiB
CoffeeScript
317 lines
9.2 KiB
CoffeeScript
asar = process.binding 'atom_common_asar'
|
|
child_process = require 'child_process'
|
|
path = require 'path'
|
|
util = require 'util'
|
|
|
|
# Cache asar archive objects.
|
|
cachedArchives = {}
|
|
getOrCreateArchive = (p) ->
|
|
archive = cachedArchives[p]
|
|
return archive if archive?
|
|
archive = asar.createArchive p
|
|
return false unless archive
|
|
cachedArchives[p] = archive
|
|
|
|
# Clean cache on quit.
|
|
process.on 'exit', ->
|
|
archive.destroy() for p, archive of cachedArchives
|
|
|
|
# Separate asar package's path from full path.
|
|
splitPath = (p) ->
|
|
return [false] if typeof p isnt 'string'
|
|
return [true, p, ''] if p.substr(-5) is '.asar'
|
|
index = p.lastIndexOf ".asar#{path.sep}"
|
|
return [false] if index is -1
|
|
[true, p.substr(0, index + 5), p.substr(index + 6)]
|
|
|
|
# Convert asar archive's Stats object to fs's Stats object.
|
|
nextInode = 0
|
|
uid = if process.getuid? then process.getuid() else 0
|
|
gid = if process.getgid? then process.getgid() else 0
|
|
fakeTime = new Date()
|
|
asarStatsToFsStats = (stats) ->
|
|
{
|
|
dev: 1,
|
|
ino: ++nextInode,
|
|
mode: 33188,
|
|
nlink: 1,
|
|
uid: uid,
|
|
gid: gid,
|
|
rdev: 0,
|
|
atime: stats.atime || fakeTime,
|
|
birthtime: stats.birthtime || fakeTime,
|
|
mtime: stats.mtime || fakeTime,
|
|
ctime: stats.ctime || fakeTime,
|
|
size: stats.size,
|
|
isFile: -> stats.isFile
|
|
isDirectory: -> stats.isDirectory
|
|
isSymbolicLink: -> stats.isLink
|
|
isBlockDevice: -> false
|
|
isCharacterDevice: -> false
|
|
isFIFO: -> false
|
|
isSocket: -> false
|
|
}
|
|
|
|
# Create a ENOENT error.
|
|
notFoundError = (asarPath, filePath, callback) ->
|
|
error = new Error("ENOENT, #{filePath} not found in #{asarPath}")
|
|
error.code = "ENOENT"
|
|
error.errno = -2
|
|
unless typeof callback is 'function'
|
|
throw error
|
|
process.nextTick -> callback error
|
|
|
|
# Create invalid archive error.
|
|
invalidArchiveError = (asarPath, callback) ->
|
|
error = new Error("Invalid package #{asarPath}")
|
|
unless typeof callback is 'function'
|
|
throw error
|
|
process.nextTick -> callback error
|
|
|
|
# Override APIs that rely on passing file path instead of content to C++.
|
|
overrideAPISync = (module, name, arg = 0) ->
|
|
old = module[name]
|
|
module[name] = ->
|
|
p = arguments[arg]
|
|
[isAsar, asarPath, filePath] = splitPath p
|
|
return old.apply this, arguments unless isAsar
|
|
|
|
archive = getOrCreateArchive asarPath
|
|
invalidArchiveError asarPath unless archive
|
|
|
|
newPath = archive.copyFileOut filePath
|
|
notFoundError asarPath, filePath unless newPath
|
|
|
|
arguments[arg] = newPath
|
|
old.apply this, arguments
|
|
|
|
overrideAPI = (module, name, arg = 0) ->
|
|
old = module[name]
|
|
module[name] = ->
|
|
p = arguments[arg]
|
|
[isAsar, asarPath, filePath] = splitPath p
|
|
return old.apply this, arguments unless isAsar
|
|
|
|
callback = arguments[arguments.length - 1]
|
|
return overrideAPISync module, name, arg unless typeof callback is 'function'
|
|
|
|
archive = getOrCreateArchive asarPath
|
|
return invalidArchiveError asarPath, callback unless archive
|
|
|
|
newPath = archive.copyFileOut filePath
|
|
return notFoundError asarPath, filePath, callback unless newPath
|
|
|
|
arguments[arg] = newPath
|
|
old.apply this, arguments
|
|
|
|
# Override fs APIs.
|
|
exports.wrapFsWithAsar = (fs) ->
|
|
lstatSync = fs.lstatSync
|
|
fs.lstatSync = (p) ->
|
|
[isAsar, asarPath, filePath] = splitPath p
|
|
return lstatSync p unless isAsar
|
|
|
|
archive = getOrCreateArchive asarPath
|
|
invalidArchiveError asarPath unless archive
|
|
|
|
stats = archive.stat filePath
|
|
notFoundError asarPath, filePath unless stats
|
|
|
|
asarStatsToFsStats stats
|
|
|
|
lstat = fs.lstat
|
|
fs.lstat = (p, callback) ->
|
|
[isAsar, asarPath, filePath] = splitPath p
|
|
return lstat p, callback unless isAsar
|
|
|
|
archive = getOrCreateArchive asarPath
|
|
return invalidArchiveError asarPath, callback unless archive
|
|
|
|
stats = getOrCreateArchive(asarPath).stat filePath
|
|
return notFoundError asarPath, filePath, callback unless stats
|
|
|
|
process.nextTick -> callback null, asarStatsToFsStats stats
|
|
|
|
statSync = fs.statSync
|
|
fs.statSync = (p) ->
|
|
[isAsar, asarPath, filePath] = splitPath p
|
|
return statSync p unless isAsar
|
|
|
|
# Do not distinguish links for now.
|
|
fs.lstatSync p
|
|
|
|
stat = fs.stat
|
|
fs.stat = (p, callback) ->
|
|
[isAsar, asarPath, filePath] = splitPath p
|
|
return stat p, callback unless isAsar
|
|
|
|
# Do not distinguish links for now.
|
|
process.nextTick -> fs.lstat p, callback
|
|
|
|
statSyncNoException = fs.statSyncNoException
|
|
fs.statSyncNoException = (p) ->
|
|
[isAsar, asarPath, filePath] = splitPath p
|
|
return statSyncNoException p unless isAsar
|
|
|
|
archive = getOrCreateArchive asarPath
|
|
return false unless archive
|
|
stats = archive.stat filePath
|
|
return false unless stats
|
|
asarStatsToFsStats stats
|
|
|
|
realpathSync = fs.realpathSync
|
|
fs.realpathSync = (p) ->
|
|
[isAsar, asarPath, filePath] = splitPath p
|
|
return realpathSync.apply this, arguments unless isAsar
|
|
|
|
archive = getOrCreateArchive asarPath
|
|
invalidArchiveError asarPath unless archive
|
|
|
|
real = archive.realpath filePath
|
|
notFoundError asarPath, filePath if real is false
|
|
|
|
path.join realpathSync(asarPath), real
|
|
|
|
realpath = fs.realpath
|
|
fs.realpath = (p, cache, callback) ->
|
|
[isAsar, asarPath, filePath] = splitPath p
|
|
return realpath.apply this, arguments unless isAsar
|
|
|
|
if typeof cache is 'function'
|
|
callback = cache
|
|
cache = undefined
|
|
|
|
archive = getOrCreateArchive asarPath
|
|
return invalidArchiveError asarPath, callback unless archive
|
|
|
|
real = archive.realpath filePath
|
|
if real is false
|
|
return notFoundError asarPath, filePath, callback
|
|
|
|
realpath asarPath, (err, p) ->
|
|
return callback err if err
|
|
callback null, path.join(p, real)
|
|
|
|
exists = fs.exists
|
|
fs.exists = (p, callback) ->
|
|
[isAsar, asarPath, filePath] = splitPath p
|
|
return exists p, callback unless isAsar
|
|
|
|
archive = getOrCreateArchive asarPath
|
|
return invalidArchiveError asarPath, callback unless archive
|
|
|
|
process.nextTick -> callback archive.stat(filePath) isnt false
|
|
|
|
existsSync = fs.existsSync
|
|
fs.existsSync = (p) ->
|
|
[isAsar, asarPath, filePath] = splitPath p
|
|
return existsSync p unless isAsar
|
|
|
|
archive = getOrCreateArchive asarPath
|
|
return false unless archive
|
|
|
|
archive.stat(filePath) isnt false
|
|
|
|
open = fs.open
|
|
readFile = fs.readFile
|
|
fs.readFile = (p, options, callback) ->
|
|
[isAsar, asarPath, filePath] = splitPath p
|
|
return readFile.apply this, arguments unless isAsar
|
|
|
|
if typeof options is 'function'
|
|
callback = options
|
|
options = undefined
|
|
|
|
archive = getOrCreateArchive asarPath
|
|
return invalidArchiveError asarPath, callback unless archive
|
|
|
|
info = archive.getFileInfo filePath
|
|
return notFoundError asarPath, filePath, callback unless info
|
|
|
|
if info.size is 0
|
|
return process.nextTick -> callback null, new Buffer(0)
|
|
|
|
if info.unpacked
|
|
realPath = archive.copyFileOut filePath
|
|
return fs.readFile realPath, options, callback
|
|
|
|
if not options
|
|
options = encoding: null
|
|
else if util.isString options
|
|
options = encoding: options
|
|
else if not util.isObject options
|
|
throw new TypeError('Bad arguments')
|
|
|
|
encoding = options.encoding
|
|
|
|
buffer = new Buffer(info.size)
|
|
fd = archive.getFd()
|
|
return notFoundError asarPath, filePath, callback unless fd >= 0
|
|
|
|
fs.read fd, buffer, 0, info.size, info.offset, (error) ->
|
|
callback error, if encoding then buffer.toString encoding else buffer
|
|
|
|
openSync = fs.openSync
|
|
readFileSync = fs.readFileSync
|
|
fs.readFileSync = (p, options) ->
|
|
[isAsar, asarPath, filePath] = splitPath p
|
|
return readFileSync.apply this, arguments unless isAsar
|
|
|
|
archive = getOrCreateArchive asarPath
|
|
invalidArchiveError asarPath unless archive
|
|
|
|
info = archive.getFileInfo filePath
|
|
notFoundError asarPath, filePath unless info
|
|
return new Buffer(0) if info.size is 0
|
|
|
|
if info.unpacked
|
|
realPath = archive.copyFileOut filePath
|
|
return fs.readFileSync realPath, options
|
|
|
|
if not options
|
|
options = encoding: null
|
|
else if util.isString options
|
|
options = encoding: options
|
|
else if not util.isObject options
|
|
throw new TypeError('Bad arguments')
|
|
|
|
encoding = options.encoding
|
|
|
|
buffer = new Buffer(info.size)
|
|
fd = archive.getFd()
|
|
notFoundError asarPath, filePath unless fd >= 0
|
|
|
|
fs.readSync fd, buffer, 0, info.size, info.offset
|
|
if encoding then buffer.toString encoding else buffer
|
|
|
|
readdir = fs.readdir
|
|
fs.readdir = (p, callback) ->
|
|
[isAsar, asarPath, filePath] = splitPath p
|
|
return readdir.apply this, arguments unless isAsar
|
|
|
|
archive = getOrCreateArchive asarPath
|
|
return invalidArchiveError asarPath, callback unless archive
|
|
|
|
files = archive.readdir filePath
|
|
return notFoundError asarPath, filePath, callback unless files
|
|
|
|
process.nextTick -> callback null, files
|
|
|
|
readdirSync = fs.readdirSync
|
|
fs.readdirSync = (p) ->
|
|
[isAsar, asarPath, filePath] = splitPath p
|
|
return readdirSync.apply this, arguments unless isAsar
|
|
|
|
archive = getOrCreateArchive asarPath
|
|
invalidArchiveError asarPath unless archive
|
|
|
|
files = archive.readdir filePath
|
|
notFoundError asarPath, filePath unless files
|
|
|
|
files
|
|
|
|
overrideAPI fs, 'open'
|
|
overrideAPI child_process, 'execFile'
|
|
overrideAPISync process, 'dlopen', 1
|
|
overrideAPISync require('module')._extensions, '.node', 1
|
|
overrideAPISync fs, 'openSync'
|