a node.js library to implement tail -F. The power than tail -F is: it can watch a not exist file, also can continue watch file after file was removed.
npm install tail-foreverTail = require('tail-forever');
tail = new Tail("fileToTail");
tail.on("line", function(line) {
console.log(line);
});
tail.on("error", function(error) {
console.log('ERROR: ', error);
});if you applicaiton down or have to restart, you want to continue watch file from last postion to avoid lost data during down time. you can do it like this:
// unwatch return opsition which has two attributes: inode and pos. inode is the file's inode and pos is position where watched. you can save it on persistent file or database.
position = tail.unwatch()
// watch file after application restart.
new Tail('/file/path', {start: position.pos, inode: position.inode})