Fix feature install order

examples/ordered-features/.devcontainer.json

@@ -0,0 +1,7 @@
+{
+  "image": "ubuntu",
+  "features": {
+    "./afeature1": {},
+    "./afeature2": {}
+  }
+}

examples/ordered-features/afeature1/devcontainer-feature.json

@@ -0,0 +1,7 @@
+{
+  "name": "A feature 1",
+  "id": "afeature1",
+  "version": "1.0.0",
+  "description": "A feature 1.",
+  "options": {}
+}

examples/ordered-features/afeature1/install.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+echo "hello world from feature 1 !"

examples/ordered-features/afeature2/devcontainer-feature.json

@@ -0,0 +1,10 @@
+{
+  "name": "A feature 2",
+  "id": "afeature2",
+  "version": "1.0.0",
+  "description": "A feature 2.",
+  "options": {},
+  "installsAfter": [
+    "./afeature1"
+  ]
+}

examples/ordered-features/afeature2/install.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+echo "hello world from feature 2 !"

pkg/devcontainer/feature/extend.go

@@ -307,12 +307,12 @@ func computeAutomaticFeatureOrder(features []*config.FeatureSet) ([]*config.Feat
 	// build lookup map
 	lookup := map[string]*config.FeatureSet{}
 	for _, feature := range features {
-		lookup[feature.ConfigID] = feature
+		lookup[feature.Config.ID] = feature
 	}
 
 	// build graph
 	for _, feature := range features {
-		_, err := g.InsertNodeAt("root", feature.ConfigID, feature)
+		_, err := g.InsertNodeAt("root", feature.Config.ID, feature)
 		if err != nil {
 			return nil, err
 		}
@@ -325,7 +325,7 @@ func computeAutomaticFeatureOrder(features []*config.FeatureSet) ([]*config.Feat
 			}
 
 			// add an edge from feature to installAfterFeature
-			_, err = g.InsertNodeAt(feature.ConfigID, installAfter, installAfterFeature)
+			_, err = g.InsertNodeAt(feature.Config.ID, installAfter, installAfterFeature)
 			if err != nil {
 				return nil, err
 			}