fix(terraform): wrong internal provider lookup (#7520)

lib/datasource/terraform-provider/index.ts

@@ -60,6 +60,7 @@ async function queryRegistry(
   const currentVersion = dep.releases.find((release) => {
     return res.version === release.version;
   });
+  // istanbul ignore else
   if (currentVersion) {
     currentVersion.releaseTimestamp = res.published_at;
   }
@@ -78,6 +79,11 @@ async function queryReleaseBackend(
   const backendURL = registryURL + `/index.json`;
   const res = (await http.getJson<TerraformProviderReleaseBackend>(backendURL))
     .body;
+
+  if (!res[backendLookUpName]) {
+    return null;
+  }
+
   const dep: ReleaseResult = {
     name: repository,
     versions: {},

lib/manager/terraform/__snapshots__/extract.spec.ts.snap

@@ -296,7 +296,9 @@ Object {
       "depName": "docker",
       "depNameShort": "docker",
       "depType": "terraform",
-      "lookupName": "terraform-providers/docker",
+      "registryUrls": Array [
+        "https://releases.hashicorp.com",
+      ],
     },
     Object {
       "currentValue": "2.7.0",

lib/manager/terraform/providers.ts

@@ -55,7 +55,10 @@ export function analyzeTerraformProvider(dep: PackageDependency): void {
   if (is.nonEmptyString(dep.managerData.source)) {
     const source = sourceExtractionRegex.exec(dep.managerData.source);
     if (source) {
-      if (source.groups.hostname) {
+      // buildin providers https://github.com/terraform-providers
+      if (source.groups.namespace === 'terraform-providers') {
+        dep.registryUrls = [`https://releases.hashicorp.com`];
+      } else if (source.groups.hostname) {
         dep.registryUrls = [`https://${source.groups.hostname}`];
         dep.lookupName = `${source.groups.namespace}/${source.groups.type}`;
       } else {