add basic build and project

lib/build.js

@@ -0,0 +1,43 @@
+'use strict';
+
+var createScm = require('../lib/scm').createScm,
+	createCommnd = require('../lib/command').createCommnd;
+
+function Build(params) {
+	this.config = params.config;
+	this.cwd = params.cwd;
+}
+
+exports.Build = Build;
+
+Build.prototype.run = function(state, callback) {
+	var self = this;
+	state.step = state.step || 'getSources';
+	this[state.step](state, function(err) {
+		if (err) {
+			state.err = err;
+			self.onFailure(state, callback);
+			return;
+		}
+		if (state.step === 'getSources') {
+			state.step = 'steps';
+			state.stepIndex = 0;
+		} else if (state.step === 'steps') {
+			if (state.stepIndex + 1 < self.config.steps.length) {
+				state.stepIndex++;
+			} else {
+				delete state.stepIndex;
+			}
+		}
+	});
+};
+
+Build.prototype.getSources = function(state, callback) {
+
+};
+
+Build.prototype.steps = function(state, callback) {
+	var cmdParams = this.config.steps[state.stepIndex];
+	var cmd = createCommand({type: cmdParams.type});
+	cmd.run(cmdParams, callback);
+};

lib/project.js

@@ -0,0 +1,87 @@
+'use strict';
+
+var Steppy = require('Steppy'),
+	fs = require('fs'),
+	path = require('path');
+
+function Project(config) {
+	this.config = config;
+}
+
+/**
+ * Validates and returns given `config` to the `callback`(err, config)
+ */
+exports.validateConfig = function(config, callback) {
+	callback(null, config);
+};
+
+/**
+ * Loads and returns project instance
+ */
+exports.load = function(baseDir, name, callback) {
+	var dir = path.join(baseDir, name);
+	Steppy(
+		function() {
+			fs.readdir(dir, this.slot());
+		},
+		function(err, dirContent) {
+			if (dirContent.indexOf('config.json') === -1) throw new Error(
+				'config.json is not found at project dir ' + dir
+			);
+			exports.loadConfig(dir, this.slot());
+		},
+		function(err, config) {
+			exports.validateConfig(config, this.slot());
+		},
+		function(err, config) {
+			this.pass(new Project(confg));
+		},
+		callback
+	);
+};
+
+exports.loadConfig = function(dir, callback) {
+	var configPath = path.join(dir, 'config.json');
+	Steppy(
+		function() {
+			fs.readFile(configPath, 'utf8', this.slot());
+		},
+		function(err, configText) {
+			try {
+				this.pass(JSON.parse(configText));
+			} catch(error) {
+				error.message = (
+					'Error while parsing json from config ' +
+					configPath + ': ' + error.message
+				);
+				throw error;
+			}
+		},
+		callback
+	);
+};
+
+exports.saveConfig = function(config, dir, callback) {
+	fs.writeFile(
+		path.join(dir, 'config.json'),
+		JSON.stringify(config, null, 4),
+		callback
+	);
+};
+
+exports.create = function(baseDir, config, callback) {
+	var dir;
+	Steppy(
+		function() {
+			dir = path.join(baseDir, config.name);
+			fs.mkdir(dir, this.slot());
+		},
+		function(err) {
+			exports.saveConfig(config, baseDir, this.slot());
+		},
+		function(err) {
+			exports.load(dir, this.slot());
+		},
+		callback
+	);
+};