github.com/noqcks/syft@v0.0.0-20230920222752-a9e2c4e288e5/test/integration/test-fixtures/npm-lock/node_modules/end-of-stream/index.js (about)

     1  var once = require('once');
     2  
     3  var noop = function() {};
     4  
     5  var isRequest = function(stream) {
     6  	return stream.setHeader && typeof stream.abort === 'function';
     7  };
     8  
     9  var isChildProcess = function(stream) {
    10  	return stream.stdio && Array.isArray(stream.stdio) && stream.stdio.length === 3
    11  };
    12  
    13  var eos = function(stream, opts, callback) {
    14  	if (typeof opts === 'function') return eos(stream, null, opts);
    15  	if (!opts) opts = {};
    16  
    17  	callback = once(callback || noop);
    18  
    19  	var ws = stream._writableState;
    20  	var rs = stream._readableState;
    21  	var readable = opts.readable || (opts.readable !== false && stream.readable);
    22  	var writable = opts.writable || (opts.writable !== false && stream.writable);
    23  	var cancelled = false;
    24  
    25  	var onlegacyfinish = function() {
    26  		if (!stream.writable) onfinish();
    27  	};
    28  
    29  	var onfinish = function() {
    30  		writable = false;
    31  		if (!readable) callback.call(stream);
    32  	};
    33  
    34  	var onend = function() {
    35  		readable = false;
    36  		if (!writable) callback.call(stream);
    37  	};
    38  
    39  	var onexit = function(exitCode) {
    40  		callback.call(stream, exitCode ? new Error('exited with error code: ' + exitCode) : null);
    41  	};
    42  
    43  	var onerror = function(err) {
    44  		callback.call(stream, err);
    45  	};
    46  
    47  	var onclose = function() {
    48  		process.nextTick(onclosenexttick);
    49  	};
    50  
    51  	var onclosenexttick = function() {
    52  		if (cancelled) return;
    53  		if (readable && !(rs && (rs.ended && !rs.destroyed))) return callback.call(stream, new Error('premature close'));
    54  		if (writable && !(ws && (ws.ended && !ws.destroyed))) return callback.call(stream, new Error('premature close'));
    55  	};
    56  
    57  	var onrequest = function() {
    58  		stream.req.on('finish', onfinish);
    59  	};
    60  
    61  	if (isRequest(stream)) {
    62  		stream.on('complete', onfinish);
    63  		stream.on('abort', onclose);
    64  		if (stream.req) onrequest();
    65  		else stream.on('request', onrequest);
    66  	} else if (writable && !ws) { // legacy streams
    67  		stream.on('end', onlegacyfinish);
    68  		stream.on('close', onlegacyfinish);
    69  	}
    70  
    71  	if (isChildProcess(stream)) stream.on('exit', onexit);
    72  
    73  	stream.on('end', onend);
    74  	stream.on('finish', onfinish);
    75  	if (opts.error !== false) stream.on('error', onerror);
    76  	stream.on('close', onclose);
    77  
    78  	return function() {
    79  		cancelled = true;
    80  		stream.removeListener('complete', onfinish);
    81  		stream.removeListener('abort', onclose);
    82  		stream.removeListener('request', onrequest);
    83  		if (stream.req) stream.req.removeListener('finish', onfinish);
    84  		stream.removeListener('end', onlegacyfinish);
    85  		stream.removeListener('close', onlegacyfinish);
    86  		stream.removeListener('finish', onfinish);
    87  		stream.removeListener('exit', onexit);
    88  		stream.removeListener('end', onend);
    89  		stream.removeListener('error', onerror);
    90  		stream.removeListener('close', onclose);
    91  	};
    92  };
    93  
    94  module.exports = eos;