cli/compose: allow depends_on advanced syntax

While stack does not support "depends_on", and will produce an warning when
used, it's useful to allow it to _parse_ a compose-file that uses the
advanced syntax.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

cli/compose/loader/full-example.yml

@@ -1,6 +1,12 @@
 version: "3.12"
 
 services:
+  bar:
+    image: busybox:latest
+    depends_on:
+      foo:
+        condition: service_started
+        required: true
   foo:
 
     build:

cli/compose/loader/testdata/full-example.yaml.golden

@@ -1,5 +1,11 @@
 version: "3.12"
 services:
+  bar:
+    image: busybox:latest
+    depends_on:
+      foo:
+        condition: service_started
+        required: true
   foo:
     build:
       context: ./dir

cli/compose/schema/data/config_schema_v3.12.json

@@ -133,7 +133,33 @@
           },
           "additionalProperties": false
         },
-        "depends_on": {"$ref": "#/definitions/list_of_strings"},
+        "depends_on": {
+          "oneOf": [
+            {"$ref": "#/definitions/list_of_strings"},
+            {
+              "type": "object",
+              "additionalProperties": false,
+              "patternProperties": {
+                "^[a-zA-Z0-9._-]+$": {
+                  "type": "object",
+                  "additionalProperties": false,
+                  "properties": {
+                    "restart": {"type": "boolean"},
+                    "required": {
+                      "type":  "boolean",
+                      "default": true
+                    },
+                    "condition": {
+                      "type": "string",
+                      "enum": ["service_started", "service_healthy", "service_completed_successfully"]
+                    }
+                  },
+                  "required": ["condition"]
+                }
+              }
+            }
+          ]
+        },
         "devices": {"type": "array", "items": {"type": "string"}, "uniqueItems": true},
         "dns": {"$ref": "#/definitions/string_or_list"},
         "dns_search": {"$ref": "#/definitions/string_or_list"},