embark-area-51/lib/watch.js

106 lines
2.5 KiB
JavaScript

/*jshint esversion: 6 */
var fs = require('./fs.js');
var chokidar = require('chokidar');
// TODO: this should be receiving the config object not re-reading the
// embark.json file
var Watch = function(options) {
this.logger = options.logger;
this.events = {};
};
Watch.prototype.start = function() {
var self = this;
// TODO: should come from the config object instead of reading the file
// directly
var embarkConfig = fs.readJSONSync("embark.json");
this.watchAssets(embarkConfig, function() {
self.logger.trace('ready to watch asset changes');
});
this.watchContracts(embarkConfig, function() {
self.logger.trace('ready to watch contract changes');
});
this.watchConfigs(function() {
self.logger.trace('ready to watch config changes');
});
this.logger.info("ready to watch file changes");
};
Watch.prototype.watchAssets = function(embarkConfig, callback) {
var self = this;
var appConfig = embarkConfig.app;
var filesToWatch = [];
for(var targetFile in appConfig) {
filesToWatch.push(appConfig[targetFile]);
}
this.watchFiles(
filesToWatch,
function(eventName, path) {
self.logger.info(`${eventName}: ${path}`);
self.trigger('rebuildAssets', path);
},
function() {
callback();
}
);
};
Watch.prototype.watchContracts = function(embarkConfig, callback) {
var self = this;
this.watchFiles(
[embarkConfig.contracts],
function(eventName, path) {
self.logger.info(`${eventName}: ${path}`);
self.trigger('redeploy', path);
},
function() {
callback();
}
);
};
Watch.prototype.watchConfigs = function(callback) {
var self = this;
this.watchFiles(
"config/**/contracts.json",
function(eventName, path) {
self.logger.info(`${eventName}: ${path}`);
self.trigger('redeploy', path);
},
function() {
callback();
}
);
};
Watch.prototype.watchFiles = function(files, changeCallback, doneCallback) {
this.logger.trace('watchFiles');
this.logger.trace(files);
var configWatcher = chokidar.watch(files, {
ignored: /[\/\\]\./, persistent: true, ignoreInitial: true, followSymlinks: true
});
configWatcher
.on('add', path => changeCallback('add', path))
.on('change', path => changeCallback('add', path))
.on('unlink', path => changeCallback('add', path))
.on('ready', doneCallback);
};
Watch.prototype.on = function(eventName, callback) {
this.events[eventName] = callback;
};
Watch.prototype.trigger = function(eventName, values) {
this.events[eventName](values);
};
module.exports = Watch;