mirror of
https://github.com/actions/setup-python.git
synced 2024-11-29 19:35:17 +00:00
91 lines
1.6 KiB
JavaScript
91 lines
1.6 KiB
JavaScript
var streamify = require('./streamify.js')
|
||
, defer = require('./defer.js')
|
||
;
|
||
|
||
// API
|
||
module.exports = ReadableAsyncKit;
|
||
|
||
/**
|
||
* Base constructor for all streams
|
||
* used to hold properties/methods
|
||
*/
|
||
function ReadableAsyncKit()
|
||
{
|
||
ReadableAsyncKit.super_.apply(this, arguments);
|
||
|
||
// list of active jobs
|
||
this.jobs = {};
|
||
|
||
// add stream methods
|
||
this.destroy = destroy;
|
||
this._start = _start;
|
||
this._read = _read;
|
||
}
|
||
|
||
/**
|
||
* Destroys readable stream,
|
||
* by aborting outstanding jobs
|
||
*
|
||
* @returns {void}
|
||
*/
|
||
function destroy()
|
||
{
|
||
if (this.destroyed)
|
||
{
|
||
return;
|
||
}
|
||
|
||
this.destroyed = true;
|
||
|
||
if (typeof this.terminator == 'function')
|
||
{
|
||
this.terminator();
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Starts provided jobs in async manner
|
||
*
|
||
* @private
|
||
*/
|
||
function _start()
|
||
{
|
||
// first argument – runner function
|
||
var runner = arguments[0]
|
||
// take away first argument
|
||
, args = Array.prototype.slice.call(arguments, 1)
|
||
// second argument - input data
|
||
, input = args[0]
|
||
// last argument - result callback
|
||
, endCb = streamify.callback.call(this, args[args.length - 1])
|
||
;
|
||
|
||
args[args.length - 1] = endCb;
|
||
// third argument - iterator
|
||
args[1] = streamify.iterator.call(this, args[1]);
|
||
|
||
// allow time for proper setup
|
||
defer(function()
|
||
{
|
||
if (!this.destroyed)
|
||
{
|
||
this.terminator = runner.apply(null, args);
|
||
}
|
||
else
|
||
{
|
||
endCb(null, Array.isArray(input) ? [] : {});
|
||
}
|
||
}.bind(this));
|
||
}
|
||
|
||
|
||
/**
|
||
* Implement _read to comply with Readable streams
|
||
* Doesn't really make sense for flowing object mode
|
||
*
|
||
* @private
|
||
*/
|
||
function _read()
|
||
{
|
||
|
||
}
|