title: ERROR: (gcloud.app.deploy) INVALID_ARGUMENT: unable to resolve source
body: <p>I am trying to deploy a <code>go 1.11</code> runtime that used to work, but recently I've been getting: <code>ERROR: (gcloud.app.deploy) INVALID_ARGUMENT: unable to resolve source</code> errors. </p>
  
  <p>Nothing in my <code>app.yaml</code> has changed, and the error message isn't helpful to understand what the issue could be. I ran it with the <code>--verbosity=debug flag</code> and get:</p>
  
  <pre><code>Building and pushing image for service [apiv1]
  DEBUG: Could not call git with args ('config', '--get-regexp', 'remote\\.(.*)\\.url'): Command '['git', 'config', '--get-regexp', 'remote\\.(.*)\\.url']' returned non-zero exit status 1
  INFO: Could not generate [source-context.json]: Could not list remote URLs from source directory: /var/folders/18/k3w6w7f169xg4mypdwj7p4_c0000gn/T/tmp6IkZKx/tmphibUAo
  Stackdriver Debugger may not be configured or enabled on this application. See https://cloud.google.com/debugger/ for more information.
  INFO: Uploading [/var/folders/18/k3w6w7f169xg4mypdwj7p4_c0000gn/T/tmpVHKXol/src.tgz] to [staging.wildfire-app-backend.appspot.com/asia.gcr.io/wildfire-app-backend/appengine/apiv1.20190506t090359:latest]
  DEBUG: Using runtime builder root [gs://runtime-builders/]
  DEBUG: Loading runtimes manifest from [gs://runtime-builders/runtimes.yaml]
  INFO: Reading [&lt;googlecloudsdk.api_lib.storage.storage_util.ObjectReference object at 0x105ca9b10&gt;]
  DEBUG: Resolved runtime [go1.11] as build configuration [gs://runtime-builders/go-1.11-builder-20181217154124.yaml]
  INFO: Using runtime builder [gs://runtime-builders/go-1.11-builder-20181217154124.yaml]
  INFO: Reading [&lt;googlecloudsdk.api_lib.storage.storage_util.ObjectReference object at 0x105b03b50&gt;]
  DEBUG: (gcloud.app.deploy) INVALID_ARGUMENT: unable to resolve source
  Traceback (most recent call last):
    File "/usr/local/Caskroom/google-cloud-sdk/latest/google-cloud-sdk/lib/googlecloudsdk/calliope/cli.py", line 985, in Execute
      resources = calliope_command.Run(cli=self, args=args)
    File "/usr/local/Caskroom/google-cloud-sdk/latest/google-cloud-sdk/lib/googlecloudsdk/calliope/backend.py", line 795, in Run
      resources = command_instance.Run(args)
    File "/usr/local/Caskroom/google-cloud-sdk/latest/google-cloud-sdk/lib/surface/app/deploy.py", line 90, in Run
      parallel_build=False)
    File "/usr/local/Caskroom/google-cloud-sdk/latest/google-cloud-sdk/lib/googlecloudsdk/command_lib/app/deploy_util.py", line 636, in RunDeploy
      flex_image_build_option=flex_image_build_option)
    File "/usr/local/Caskroom/google-cloud-sdk/latest/google-cloud-sdk/lib/googlecloudsdk/command_lib/app/deploy_util.py", line 411, in Deploy
      image, code_bucket_ref, gcr_domain, flex_image_build_option)
    File "/usr/local/Caskroom/google-cloud-sdk/latest/google-cloud-sdk/lib/googlecloudsdk/command_lib/app/deploy_util.py", line 287, in _PossiblyBuildAndPush
      self.deploy_options.parallel_build)
    File "/usr/local/Caskroom/google-cloud-sdk/latest/google-cloud-sdk/lib/googlecloudsdk/api_lib/app/deploy_command_util.py", line 450, in BuildAndPushDockerImage
      return _SubmitBuild(build, image, project, parallel_build)
    File "/usr/local/Caskroom/google-cloud-sdk/latest/google-cloud-sdk/lib/googlecloudsdk/api_lib/app/deploy_command_util.py", line 483, in _SubmitBuild
      build, project=project)
    File "/usr/local/Caskroom/google-cloud-sdk/latest/google-cloud-sdk/lib/googlecloudsdk/api_lib/cloudbuild/build.py", line 149, in ExecuteCloudBuild
      build_op = self.ExecuteCloudBuildAsync(build, project)
    File "/usr/local/Caskroom/google-cloud-sdk/latest/google-cloud-sdk/lib/googlecloudsdk/api_lib/cloudbuild/build.py", line 133, in ExecuteCloudBuildAsync
      build=build,))
    File "/usr/local/Caskroom/google-cloud-sdk/latest/google-cloud-sdk/lib/googlecloudsdk/third_party/apis/cloudbuild/v1/cloudbuild_v1_client.py", line 205, in Create
      config, request, global_params=global_params)
    File "/usr/local/Caskroom/google-cloud-sdk/latest/google-cloud-sdk/lib/third_party/apitools/base/py/base_api.py", line 731, in _RunMethod
      return self.ProcessHttpResponse(method_config, http_response, request)
    File "/usr/local/Caskroom/google-cloud-sdk/latest/google-cloud-sdk/lib/third_party/apitools/base/py/base_api.py", line 737, in ProcessHttpResponse
      self.__ProcessHttpResponse(method_config, http_response, request))
    File "/usr/local/Caskroom/google-cloud-sdk/latest/google-cloud-sdk/lib/third_party/apitools/base/py/base_api.py", line 604, in __ProcessHttpResponse
      http_response, method_config=method_config, request=request)
  HttpBadRequestError: HttpError accessing &lt;https://cloudbuild.googleapis.com/v1/projects/wildfire-app-backend/builds?alt=json&gt;: response: &lt;{'status': '400', 'content-length': '114', 'x-xss-protection': '0'
  , 'x-content-type-options': 'nosniff', 'transfer-encoding': 'chunked', 'vary': 'Origin, X-Origin, Referer', 'server': 'ESF', '-content-encoding': 'gzip', 'cache-control': 'private', 'date': 'Mon, 06 May 2
  019 16:04:41 GMT', 'x-frame-options': 'SAMEORIGIN', 'alt-svc': 'quic=":443"; ma=2592000; v="46,44,43,39"', 'content-type': 'application/json; charset=UTF-8'}&gt;, content &lt;{
    "error": {
      "code": 400,
      "message": "unable to resolve source",
      "status": "INVALID_ARGUMENT"
    }
  }
  &gt;
  ERROR: (gcloud.app.deploy) INVALID_ARGUMENT: unable to resolve 
  </code></pre>
  
  <p>Any advice would be useful, I also tried it with <code>gcloud beta</code>, I rotated my credentials and was of no use. My user has <code>Owner</code> role, but I added individually all the roles that might be necessary </p>
  
  <pre><code>App Engine Admin
  App Engine Code Viewer
  App Engine Deployer
  App Engine Service Admin
  Project Billing Manager
  Cloud Build Service Account
  Cloud Build Editor
  Cloud Build Viewer
  Owner
  Storage Admin
  </code></pre>