add basic project config validation

lib/project.js

@@ -7,14 +7,55 @@ var Steppy = require('twostep').Steppy,
 	reader = require('./reader'),
 	db = require('../db'),
 	utils = require('./utils'),
-	SpawnCommand = require('./command/spawn').Command;
+	SpawnCommand = require('./command/spawn').Command,
+	validateParams = require('./validateParams');
 
 
 /**
  * Validates and returns given `config` to the `callback`(err, config)
  */
 exports.validateConfig = function(config, callback) {
-	callback(null, config);
+	Steppy(
+		function() {
+			validateParams(config, {
+				type: 'object',
+				properties: {
+					scm: {
+						type: 'object',
+						required: true,
+						properties: {
+							type: {enum: ['git', 'mercurial'], required: true},
+							repository: {type: 'string', required: true},
+							rev: {type: 'string', required: true}
+						}
+					},
+					steps: {
+						type: 'array',
+						required: true,
+						items: {
+							type: 'object',
+							properties: {
+								cmd: {type: 'string', required: true},
+								shell: {type: 'string'}
+							}
+						}
+					}
+				},
+				additionalProperties: true
+			});
+
+			this.pass(null);
+		},
+		function(err) {
+			if (err) {
+				err.message = (
+					'Error during validation of project "' + config.name +
+					'": ' + err.message
+				);
+			}
+			callback(err, config);
+		}
+	);
 };
 
 /**
@@ -29,13 +70,11 @@ exports.load = function(baseDir, name, callback) {
 		function(err, dirContent) {
 			exports.loadConfig(dir, this.slot());
 		},
-		function(err, config) {
-			exports.validateConfig(config, this.slot());
-		},
 		function(err, config) {
 			config.name = name;
 			config.dir = dir;
-			this.pass(config);
+
+			exports.validateConfig(config, this.slot());
 		},
 		callback
 	);
@@ -79,10 +118,10 @@ exports.loadConfig = function(dir, callback) {
 				});
 			}
 
-			// apply defaults
+			// apply defaults to not yet validated config
 			_(config.steps).each(function(step) {
 				if (!step.type) step.type = 'shell';
-				if (!step.name) step.name = utils.prune(step.cmd, 40);
+				if (!step.name && step.cmd) step.name = utils.prune(step.cmd, 40);
 			});
 
 			this.pass(config);

package.json

@@ -51,7 +51,8 @@
     "socket.io": "1.3.5",
     "twostep": "0.4.1",
     "underscore": "1.8.3",
-    "through": "2.3.6"
+    "through": "2.3.6",
+    "conform": "0.2.12"
   },
   "devDependencies": {
     "bower": "1.4.1",