Include fork of byline library

lib/byline.js

@@ -0,0 +1,157 @@
+// Forked from https://github.com/jahewson/node-byline
+
+// Copyright (C) 2011-2015 John Hewson
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+
+var stream = require('stream'),
+    util = require('util'),
+    timers = require('timers');
+
+// convinience API
+module.exports = function(readStream, options) {
+  return module.exports.createStream(readStream, options);
+};
+
+// basic API
+module.exports.createStream = function(readStream, options) {
+  if (readStream) {
+    return createLineStream(readStream, options);
+  } else {
+    return new LineStream(options);
+  }
+};
+
+// deprecated API
+module.exports.createLineStream = function(readStream) {
+  console.log('WARNING: byline#createLineStream is deprecated and will be removed soon');
+  return createLineStream(readStream);
+};
+
+function createLineStream(readStream, options) {
+  if (!readStream) {
+    throw new Error('expected readStream');
+  }
+  if (!readStream.readable) {
+    throw new Error('readStream must be readable');
+  }
+  var ls = new LineStream(options);
+  readStream.pipe(ls);
+  return ls;
+}
+
+//
+// using the new node v0.10 "streams2" API
+//
+
+module.exports.LineStream = LineStream;
+
+function LineStream(options) {
+  stream.Transform.call(this, options);
+  options = options || {};
+
+  // use objectMode to stop the output from being buffered
+  // which re-concatanates the lines, just without newlines.
+  this._readableState.objectMode = true;
+  this._lineBuffer = [];
+  this._keepEmptyLines = options.keepEmptyLines || false;
+  this._lastChunkEndedWithCR = false;
+
+  // take the source's encoding if we don't have one
+  var self = this;
+  this.on('pipe', function(src) {
+    if (!self.encoding) {
+      // but we can't do this for old-style streams
+      if (src instanceof stream.Readable) {
+        self.encoding = src._readableState.encoding;
+      }
+    }
+  });
+}
+util.inherits(LineStream, stream.Transform);
+
+LineStream.prototype._transform = function(chunk, encoding, done) {
+  // decode binary chunks as UTF-8
+  encoding = encoding || 'utf8';
+
+  if (Buffer.isBuffer(chunk)) {
+    if (encoding == 'buffer') {
+      chunk = chunk.toString(); // utf8
+      encoding = 'utf8';
+    }
+    else {
+     chunk = chunk.toString(encoding);
+    }
+  }
+  this._chunkEncoding = encoding;
+
+  // see: http://www.unicode.org/reports/tr18/#Line_Boundaries
+  var lines = chunk.split(/\r\n|[\n\v\f\r\x85\u2028\u2029]/g);
+
+  // don't split CRLF which spans chunks
+  if (this._lastChunkEndedWithCR && chunk[0] == '\n') {
+    lines.shift();
+  }
+
+  if (this._lineBuffer.length > 0) {
+    this._lineBuffer[this._lineBuffer.length - 1] += lines[0];
+    lines.shift();
+  }
+
+  this._lastChunkEndedWithCR = chunk[chunk.length - 1] == '\r';
+  this._lineBuffer = this._lineBuffer.concat(lines);
+  this._pushBuffer(encoding, 1, done);
+};
+
+LineStream.prototype._pushBuffer = function(encoding, keep, done) {
+  // always buffer the last (possibly partial) line
+  while (this._lineBuffer.length > keep) {
+    var line = this._lineBuffer.shift();
+    // skip empty lines
+    if (this._keepEmptyLines || line.length > 0 ) {
+      if (!this.push(this._reencode(line, encoding))) {
+        // when the high-water mark is reached, defer pushes until the next tick
+        var self = this;
+        timers.setImmediate(function() {
+          self._pushBuffer(encoding, keep, done);
+        });
+        return;
+      }
+    }
+  }
+  done();
+};
+
+LineStream.prototype._flush = function(done) {
+  this._pushBuffer(this._chunkEncoding, 0, done);
+};
+
+// see Readable::push
+LineStream.prototype._reencode = function(line, chunkEncoding) {
+  if (this.encoding && this.encoding != chunkEncoding) {
+    return new Buffer(line, chunkEncoding).toString(this.encoding);
+  }
+  else if (this.encoding) {
+    // this should be the most common case, i.e. we're using an encoded source stream
+    return line;
+  }
+  else {
+    return new Buffer(line, chunkEncoding);
+  }
+};

lib/persistence.js

@@ -6,7 +6,7 @@
  */
 const path = require('path')
 const async = require('async')
-const byline = require('byline')
+const byline = require('./byline')
 const customUtils = require('./customUtils.js')
 const Index = require('./indexes.js')
 const model = require('./model.js')