tests & depends_on

Author: apocas

README.md

@@ -36,7 +36,6 @@ var compose = new DockerodeCompose(docker);
 
 ## Tests
 
- * `docker pull ubuntu:latest` to prepare your system for the tests.
  * Tests are implemented using `mocha` and `chai`. Run them with `npm test`.
 
 ## Examples

lib/services.js

@@ -1,7 +1,8 @@
+const tools = require('./tools');
 
 module.exports = async function (docker, projectName, recipe) {
   var services = [];
-  var serviceNames = Object.keys(recipe.services || []);
+  var serviceNames = tools.sortServices(recipe);
   for (var serviceName of serviceNames) {
     var service = recipe.services[serviceName];
 

lib/tools.js

@@ -0,0 +1,25 @@
+module.exports = {
+  'sortServices': function (recipe) {
+    var order = [];
+    var serviceNames = Object.keys(recipe.services || []);
+
+    while (order.length !== serviceNames.length) {
+      for (var serviceName of serviceNames) {
+        if(order.indexOf(serviceName) === -1) {
+          insertService(serviceName, recipe.services[serviceName].depends_on || [], order)
+        }
+      }
+    }
+    return order;
+  }
+}
+
+function insertService(serviceName, depends_on, order) {
+  var position = -1;
+  for (var serviceDep of depends_on) {
+    var p = order.indexOf(serviceDep);
+    if (p === -1) return;
+    if (p > position) position = p;
+  }
+  order.splice(position + 1, 0, serviceName);
+}