Bump artifact dependencies if CODEQL_ACTION_ARTIFACT_V2_UPGRADE enabled (#2482)

Co-authored-by: Andrew Eisenberg <aeisenberg@github.com>
Co-authored-by: Henry Mercer <henrymercer@github.com>

node_modules/unzip-stream/lib/extract.js

@@ -0,0 +1,97 @@
+var fs = require('fs');
+var path = require('path');
+var util = require('util');
+var mkdirp = require('mkdirp');
+var Transform = require('stream').Transform;
+var UnzipStream = require('./unzip-stream');
+
+function Extract (opts) {
+    if (!(this instanceof Extract))
+    return new Extract(opts);
+
+    Transform.call(this);
+
+    this.opts = opts || {};
+    this.unzipStream = new UnzipStream(this.opts);
+    this.unfinishedEntries = 0;
+    this.afterFlushWait = false;
+    this.createdDirectories = {};
+
+    var self = this;
+    this.unzipStream.on('entry', this._processEntry.bind(this));
+    this.unzipStream.on('error', function(error) {
+        self.emit('error', error);
+    });
+}
+
+util.inherits(Extract, Transform);
+
+Extract.prototype._transform = function (chunk, encoding, cb) {
+    this.unzipStream.write(chunk, encoding, cb);
+}
+
+Extract.prototype._flush = function (cb) {
+    var self = this;
+
+    var allDone = function() {
+        process.nextTick(function() { self.emit('close'); });
+        cb();
+    }
+
+    this.unzipStream.end(function() {
+        if (self.unfinishedEntries > 0) {
+            self.afterFlushWait = true;
+            return self.on('await-finished', allDone);
+        }
+        allDone();
+    });
+}
+
+Extract.prototype._processEntry = function (entry) {
+    var self = this;
+    var destPath = path.join(this.opts.path, entry.path);
+    var directory = entry.isDirectory ? destPath : path.dirname(destPath);
+
+    this.unfinishedEntries++;
+
+    var writeFileFn = function() {
+        var pipedStream = fs.createWriteStream(destPath);
+
+        pipedStream.on('close', function() {
+            self.unfinishedEntries--;
+            self._notifyAwaiter();
+        });
+        pipedStream.on('error', function (error) {
+            self.emit('error', error);
+        });
+        entry.pipe(pipedStream);
+    }
+
+    if (this.createdDirectories[directory] || directory === '.') {
+        return writeFileFn();
+    }
+
+    // FIXME: calls to mkdirp can still be duplicated
+    mkdirp(directory, function(err) {
+        if (err) return self.emit('error', err);
+
+        self.createdDirectories[directory] = true;
+
+        if (entry.isDirectory) {
+            self.unfinishedEntries--;
+            self._notifyAwaiter();
+            return;
+        }
+
+        writeFileFn();
+    });
+}
+
+Extract.prototype._notifyAwaiter = function() {
+    if (this.afterFlushWait && this.unfinishedEntries === 0) {
+        this.emit('await-finished');
+        this.afterFlushWait = false;
+    }
+}
+
+module.exports = Extract;