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Modify Tail node to only send new messages

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Now with test that works with it.
Part of Issue #326
Now need to redo with libs that support windows.
This commit is contained in:
Dave C-J
2014-08-22 12:44:40 +01:00
parent a8ade083d4
commit ecbf4add6b
4 changed files with 58 additions and 19 deletions
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9
nodes/core/storage/28-tail.js
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@@ -1,5 +1,5 @@
/**
* Copyright 2013 IBM Corp.
* Copyright 2013, 2014 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -18,6 +18,11 @@ module.exports = function(RED) {
"use strict";
var fs = require("fs");
var spawn = require('child_process').spawn;
var plat = require('os').platform();
if (plat.match(/^win/)) {
throw "Info : Currently not supported on Windows.";
}
function TailNode(n) {
RED.nodes.createNode(this,n);
@@ -28,7 +33,7 @@ module.exports = function(RED) {
var err = "";
// TODO: rewrite to use node-tail
var tail = spawn("tail", ["-F", this.filename]);
var tail = spawn("tail", ["-F", "-n", "0", this.filename]);
tail.stdout.on("data", function (data) {
if (node.split) {
// TODO: allow customisation of the line break - as we do elsewhere