Fix broken azappconfig pagers (Azure#19426)

* Fix broken azappconfig pagers

The service returns the path plus query params in the next link, so we
need to use a helper to construct the full URL.

* rename swagger file

Author: jhendrixMSFT

sdk/data/azappconfig/CHANGELOG.md

@@ -7,6 +7,7 @@
 ### Breaking Changes
 
 ### Bugs Fixed
+* Fixed missing host URL when iterating over pages.
 
 ### Other Changes
 * Regenerated internal code with latest Autorest Go code generator.

sdk/data/azappconfig/appconfiguration_ext.json

@@ -0,0 +1,57 @@
+{
+  "swagger": "2.0",
+  "info": {
+    "version": "1.0",
+    "title": "Azure App Configuration"
+  },
+  "schemes": [
+    "https"
+  ],
+  "consumes": [
+    "application/json"
+  ],
+  "produces": [
+    "application/json"
+  ],
+  "paths": {
+    "/{nextLink}": {
+      "get": {
+        "operationId": "GetNextPage",
+        "x-ms-pageable": {
+          "itemName": "items",
+          "nextLinkName": "@nextLink",
+          "operationName": "GetNextPage"
+        },
+        "parameters": [
+          {
+            "name": "nextLink",
+            "in": "path",
+            "required": true,
+            "type": "string",
+            "x-ms-skip-url-encoding": true
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Success",
+            "schema": {
+                "$ref": "https://github.com/Azure/azure-rest-api-specs/blob/e01d8afe9be7633ed36db014af16d47fec01f737/specification/appconfiguration/data-plane/Microsoft.AppConfiguration/stable/1.0/appconfiguration.json#/definitions/KeyListResult"
+            },
+            "headers": {
+                "Sync-Token": {
+                "description": "Enables real-time consistency between requests by providing the returned value in the next request made to the server.",
+                "type": "string"
+                }
+            }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed",
+            "schema": {
+                "$ref": "https://github.com/Azure/azure-rest-api-specs/blob/e01d8afe9be7633ed36db014af16d47fec01f737/specification/appconfiguration/data-plane/Microsoft.AppConfiguration/stable/1.0/appconfiguration.json#/definitions/Error"
+            }
+          }
+        }
+      }
+    }
+  }
+}

sdk/data/azappconfig/autorest.md

@@ -7,6 +7,7 @@ go: true
 version: "^3.0.0"
 input-file:
 - https://github.com/Azure/azure-rest-api-specs/blob/e01d8afe9be7633ed36db014af16d47fec01f737/specification/appconfiguration/data-plane/Microsoft.AppConfiguration/stable/1.0/appconfiguration.json
+- appconfiguration_ext.json
 license-header: MICROSOFT_MIT_NO_VERSION
 clear-output-folder: true
 output-folder: internal/generated
@@ -65,3 +66,18 @@ directive:
         "modelAsString": true
     };
 ```
+
+### Fix up pagers
+```yaml
+directive:
+- from: swagger-document
+  where: $.paths.*.get.x-ms-pageable
+  transform: >
+    $.operationName = "GetNextPage";
+- from: azureappconfiguration_client.go
+  where: $
+  transform: >
+    return $.
+      replace(/urlPath\s+:=\s+"\/\{nextLink\}"/, "urlPath := nextLink").
+      replace(/\s+urlPath\s+=\s+strings\.ReplaceAll\(urlPath, "\{nextLink\}", nextLink\)/, "");
+```