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#!/usr/bin/env node
var fs = require('fs');
var path = require('path');
// These are the node packages we are going to wrap.
var packages = {
assert: { skip: true },
async_hooks: { optional: true, skip: true },
buffer: { skip: true },
child_process: {
exec: { promisify: true, returnsObject: true, args: 1, cb:['stdout','stderr'] },
execFile: { promisify: true, returnsObject: true, args: 1, cb:['stdout','stderr'] },
fork: { promisify: false },
spawn: { promisify: false },
},
cluster: {
disconnect: { promisify: true, args: 0 },
},
console: { skip: true },
crypto: {
DEFAULT_ENCODING: { constant: false },
pseudoRandomBytes: { promisify: true, syncIfNoCallback: true, args: 1 },
randomBytes: { promisify: true, syncIfNoCallback: true, args: 1 },
randomFill: { args: 1 },
},
dns: {
// XXX: Resolver could be wrapped...
ADNAME: { skip: true },
lookup: { promisify: true, args: 1 },
lookupService: { promisify: true, args: 2, cb:['hostname','service'] },
resolve: { promisify: true, args: 1 },
resolve4: { promisify: true, args: 1 },
resolve6: { promisify: true, args: 1 },
resolveAny: { promisify: true, args: 1 },
resolveCname: { promisify: true, args: 1 },
resolveMx: { promisify: true, args: 1 },
resolveNaptr: { promisify: true, args: 1 },
resolveNs: { promisify: true, args: 1 },
resolvePtr: { promisify: true, args: 1 },
resolveSoa: { promisify: true, args: 1 },
resolveSrv: { promisify: true, args: 1 },
resolveTxt: { promisify: true, args: 1 },
reverse: { promisify: true, args: 1 },
},
domain: {
// XXX Domain#bind and Domain#intercept should be promisified
},
events: {
skip: true,
},
fs: {
access: { args: 1 },
appendFile: { args: 2 },
copyFile: { args: 2 },
exists: { promisify: true, noError: true },
mkdir: { args: 1 },
mkdtemp: { args: 1 },
open: { args: 2 },
read: { cb: ['read', 'buffer'] },
readdir: { args: 1 },
readlink: { args: 1 },
readFile: { args: 1 },
realpath: { args: 1 },
symlink: { args: 2 },
write: { cb: ['written', 'buffer'] },
writeFile: { args: 2 },
},
http: {
STATUS_CODES: { constant: true },
// XXX ClientRequest#setTimeout should be promisified
// XXX IncomingMessage#setTimeout should be promisified
// XXX Server#listen, Server#close, and Server#setTimeout
// should be promisified
// XXX ServerResponse#setTimeout should be promisified
request: { promisify: true, returnsObject: true, args: 1 },
get: { promisify: true, returnsObject: true, args: 1 },
},
http2: {
optional: true,
},
https: {
// XXX Server#listen, Server#close, and Server#setTimeout
// should be promisified
request: { promisify: true, returnsObject: true, args: 1 },
get: { promisify: true, returnsObject: true, args: 1 },
},
inspector: {
optional: true,
skip: true,
},
net: {
// XXX Server#listen, Server#close, Server#getConnections
// should be promisified
// XXX Socket#write, Socket#setTimeout should be promisified
},
os: { skip: true },
path: { skip: true },
perf_hooks: { optional: true, skip: true },
process: {
nextTick: { promisify: true, args: 0 }
},
punycode: { optional: true, skip: true },
querystring: { skip: true },
readline: {
// XXX Interface#question should be promisified
},
repl: { skip: true },
stream: {
super_: { skip: true },
// XXX Writable#write and Writable#end should be promisified
// XXX same for Duplex and Transform? inheritance unclear.
// what about _read/_write/_transform/_flush for implementers?
},
string_decoder: { skip: true },
timers: {
setImmediate: { promisify: true, callbackIsFirstArg: true, noError: true },
setTimeout: { promisify: true, callbackIsFirstArg: true, noError: true },
},
tls: {
connect: { promisify: true, returnsObject: true, args: 1 },
createServer: { promisify: true, returnsObject: true, args: 1 },
},
tty: {
skip: true
// should tty.ReadStream and tty.WriteStream be promisified?
// (process.stdin / process.stdout)
},
dgram: {
// note that createSocket takes a listener, not a callback
// XXX Socket#send and Socket#bind should be promisified
},
url: { skip: true },
util: {
pump: { promisify: true, args: 2 }
},
v8: { optional: true, skip: true },
vm: { skip: true },
zlib: {
codes: { constant: true },
deflate: { promisify: true, args: 1 },
deflateRaw: { promisify: true, args: 1 },
gzip: { promisify: true, args: 1 },
gunzip: { promisify: true, args: 1 },
inflate: { promisify: true, args: 1 },
inflateRaw: { promisify: true, args: 1 },
unzip: { promisify: true, args: 1 },
},
};
var sorted = function(arr) {
var s = arr.slice(0);
s.sort();
return s;
}
sorted(Object.keys(packages)).forEach(function(pkgname) {
var pkgopts = packages[pkgname] || {};
var script = [];
var emit = function(l) { script.push(l); };
var m;
if (pkgname==='process') {
m = process;
} else if (pkgopts.optional) {
// Package is not present in older versions of node.
emit('var '+pkgname+' = {};');
emit('try { '+pkgname+' = require("'+pkgname+'"); } catch (e) { }');
m = require(pkgname);
} else {
emit('var '+pkgname+' = require("'+pkgname+'");');
m = require(pkgname);
}
if (pkgopts.skip) {
emit('module.exports = '+pkgname+';');
} else {
emit('var promisify = require("./_promisify.js");');
emit('var bind = function(c, f) { return f && f.bind(c); };');
emit('Object.defineProperties(module.exports, {');
sorted(Object.keys(m)).forEach(function(prop) {
var opts = pkgopts[prop] || {};
// skip private properties
if (opts.skip !== undefined ? opts.skip : /^_/.test(prop)) {
emit(' //'+prop+': // skipping');
return;
}
var out = ' '+prop+': { enumerable: true, ';
// Is this a function?
var caps = /^[A-Z]/.test(prop);
var isFunction = typeof(m[prop]) === 'function';
var isConstant = opts.constant!==undefined ? opts.constant :
isFunction ?
(opts.bind !== undefined ? opts.bind===false : caps) :
caps;
if (isConstant) {
emit(out+'value: '+pkgname+'.'+prop+' },');
return;
}
if (!isFunction) {
// add getters & setters
emit(out+'get: function() { return '+pkgname+'.'+prop+'; }, '+
'set: function(v) { '+pkgname+'.'+prop+' = v; } },');
return;
}
// Is this a async function?
var isAsync = (typeof(m[prop+'Sync']) === 'function');
if (opts.promisify) { isAsync = true; }
if (!isAsync || opts.promisify === false) {
emit(out+'value: bind('+pkgname+', '+pkgname+'.'+prop+') },');
return;
}
// OK, this is very likely an async function!
// number of mandatory options (may be additional optional args)
var nargs = opts.args!==undefined ? opts.args :
(typeof(m[prop+'Sync']) === 'function') ?
m[prop+'Sync'].length : m[prop].length;
var options = {}, emitOptions = false;
if (opts.cb) {
options.pattern = opts.cb;
emitOptions = true;
}
if (opts.noError) {
options.noError = true;
emitOptions = true;
}
if (opts.returnsObject) {
options.returnsObject = true;
emitOptions = true;
}
if (opts.callbackIsFirstArg) {
options.callbackIsFirstArg = true;
nargs = 0;
emitOptions = true;
}
var optString = emitOptions ? ', '+JSON.stringify(options) : '';
emit(out+'value: promisify('+pkgname+', '+pkgname+'.'+prop+', '+nargs+optString+') },');
if (opts.syncIfNoCallback) {
emit(out.replace(/:/,"Sync:")+'value: '+pkgname+'.'+prop+'.bind('+pkgname+') },');
}
});
emit('});');
}
// Write out this wrapped package!
fs.writeFileSync(path.join(__dirname,'..',pkgname+'.js'),
script.join('\n'), 'utf-8');
});