Add documentation

docs/commands/data.json

@@ -411,7 +411,8 @@
         "required": true,
         "inherit": "azure_devops.access_token"
       }
-    ]
+    ],
+    "markdown": "## Description\n\nAppend an existing variable group in Azure DevOps project and its services.\n\n## Command Prerequisites\n\nThis command requires to have an existing bedrock project that was initialized\nwith `spk project init`. It also requires that the variable group to be added\nexists in the Azure DevOps project.\n\n## Example\n\nWhen an bedrock project repository is first initialized with `spk project init`,\nit will create a `bedrock.yaml` file that looks similar to this:\n\n```yaml\nrings:\n  master:\n    isDefault: true\nvariableGroups: []\nservices: []\n.\n.\n.\n```\n\nrunning `spk project append-variable-group my-vg` with a variable group name, in\nthis case `my-vg`, will add it under the `variables` section if it does not\nalready exist:\n\n```yaml\nrings:\n  master:\n    isDefault: true\nvariableGroups:\n    - my-vg\nservices: []\n.\n.\n.\n```\n\nIf there are any `services` specified, it will add the variable group to its\ncorresponding `build-update-hld.yaml` file under the `variables` section:\n\n```yaml\nvariables:\n  - group: my-vg\n```\n"
   },
   "project create-variable-group": {
     "command": "create-variable-group <variable-group-name>",

src/commands/project/append-variable-group.md

@@ -0,0 +1,49 @@
+## Description
+
+Append an existing variable group in Azure DevOps project and its services.
+
+## Command Prerequisites
+
+This command requires to have an existing bedrock project that was initialized
+with `spk project init`. It also requires that the variable group to be added
+exists in the Azure DevOps project.
+
+## Example
+
+When an bedrock project repository is first initialized with `spk project init`,
+it will create a `bedrock.yaml` file that looks similar to this:
+
+```yaml
+rings:
+  master:
+    isDefault: true
+variableGroups: []
+services: []
+.
+.
+.
+```
+
+running `spk project append-variable-group my-vg` with a variable group name, in
+this case `my-vg`, will add it under the `variables` section if it does not
+already exist:
+
+```yaml
+rings:
+  master:
+    isDefault: true
+variableGroups:
+    - my-vg
+services: []
+.
+.
+.
+```
+
+If there are any `services` specified, it will add the variable group to its
+corresponding `build-update-hld.yaml` file under the `variables` section:
+
+```yaml
+variables:
+  - group: my-vg
+```