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livereload-server.js
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livereload-server.js
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'use strict';
const Promise = require('rsvp').Promise;
const fs = require('fs');
const Task = require('../../models/task');
const SilentError = require('silent-error');
const walkSync = require('walk-sync');
const path = require('path');
const FSTree = require('fs-tree-diff');
let logger = require('heimdalljs-logger')('ember-cli:live-reload:');
function createServer(options) {
let instance;
const Server = (require('tiny-lr')).Server;
Server.prototype.error = function() {
instance.error.apply(instance, arguments);
};
instance = new Server(options);
return instance;
}
function isNotRemoved(entryTuple) {
let operation = entryTuple[0];
return operation !== 'unlink' && operation !== 'rmdir';
}
function isNotDirectory(entryTuple) {
let entry = entryTuple[2];
return entry && !entry.isDirectory();
}
function relativePath(patch) {
return patch[1];
}
function isNotSourceMapFile(file) {
return !(/\.map$/.test(file));
}
class LiveReloadServerTask extends Task {
liveReloadServer(options) {
if (this._liveReloadServer) {
return this._liveReloadServer;
}
this._liveReloadServer = createServer(options);
return this._liveReloadServer;
}
listen(options) {
let server = this.liveReloadServer(options);
return new Promise((resolve, reject) => {
server.error = reject;
server.listen(options.port, options.host, resolve);
});
}
start(options) {
let tlroptions = {};
tlroptions.ssl = options.ssl;
tlroptions.host = options.liveReloadHost || options.host;
tlroptions.port = options.liveReloadPort;
if (options.liveReload !== true) {
return Promise.resolve('Livereload server manually disabled.');
}
if (options.ssl) {
tlroptions.key = fs.readFileSync(options.sslKey);
tlroptions.cert = fs.readFileSync(options.sslCert);
}
this.tree = new FSTree.fromEntries([]);
// Reload on file changes
this.watcher.on('change', function() {
try {
this.didChange.apply(this, arguments);
} catch (e) {
this.ui.writeError(e);
}
}.bind(this));
this.watcher.on('error', this.didChange.bind(this));
// Reload on express server restarts
this.expressServer.on('restart', this.didRestart.bind(this));
let url = `http${options.ssl ? 's' : ''}://${this.displayHost(tlroptions.host)}:${tlroptions.port}`;
// Start LiveReload server
return this.listen(tlroptions)
.then(this.writeBanner.bind(this, url))
.catch(this.writeErrorBanner.bind(this, url));
}
displayHost(specifiedHost) {
return specifiedHost || 'localhost';
}
writeBanner(url) {
this.ui.writeLine(`Livereload server on ${url}`);
}
writeErrorBanner(url) {
throw new SilentError(`Livereload failed on ${url}. It is either in use or you do not have permission.`);
}
writeSkipBanner(filePath) {
this.ui.writeLine(`Skipping livereload for: ${filePath}`);
}
getDirectoryEntries(directory) {
return walkSync.entries(directory);
}
shouldTriggerReload(options) {
let result = true;
if (this.project.liveReloadFilterPatterns.length > 0) {
let filePath = path.relative(this.project.root, options.filePath || '');
result = this.project.liveReloadFilterPatterns
.every(pattern => pattern.test(filePath) === false);
if (result === false) {
this.writeSkipBanner(filePath);
}
}
return result;
}
didChange(results) {
let previousTree = this.tree;
let files;
if (results.stack) {
this._hasCompileError = true;
files = ['LiveReload due to compile error'];
} else if (this._hasCompileError) {
this._hasCompileError = false;
files = ['LiveReload due to resolved compile error'];
} else if (results.directory) {
this.tree = new FSTree.fromEntries(this.getDirectoryEntries(results.directory), { sortAndExpand: true });
files = previousTree.calculatePatch(this.tree)
.filter(isNotRemoved)
.filter(isNotDirectory)
.map(relativePath)
.filter(isNotSourceMapFile);
} else {
files = ['LiveReload files'];
}
logger.info('files %a', files);
if (this.shouldTriggerReload(results)) {
this.liveReloadServer().changed({
body: {
files,
},
});
this.analytics.track({
name: 'broccoli watcher',
message: 'live-reload',
});
}
}
didRestart() {
this.liveReloadServer().changed({
body: {
files: ['LiveReload files'],
},
});
this.analytics.track({
name: 'express server',
message: 'live-reload',
});
}
}
module.exports = LiveReloadServerTask;