After 'amplify push' error - The "path" argument must be one of type string...

Description

After ‘amplify push’ can not ‘push’ again. Subsequent pushes fail with the error ‘The “path” argument must be one of type string, Buffer, or URL. Received type object’

Other commands (like ‘amplify function build’) also fail. Output of failure listed below.

To Reproduce I have project with with vue client, and rest apis

brian@nova:~/Documents/whoclean/repos/broom[skip-lambda-learn]$ amplify init
Note: It is recommended to run this command from the root of your app directory
You're initializing your project with a beta version of the CLI which supports multiple environments of your project
? Do you want to use an existing environment? Yes
? Choose the environment you would like to use: skiptest
Using default provider  awscloudformation
✔ Initialized provider successfully.
Initialized your environment successfully.

Your project has been successfully initialized and connected to the cloud!

#removed output for brevity

brian@nova:~/Documents/whoclean/repos/broom[skip-lambda-learn]$ amplify push

Current Environment: skiptest

| Category | Resource name    | Operation | Provider plugin   |
| -------- | ---------------- | --------- | ----------------- |
| Function | dbpatch          | Update    | awscloudformation |
| Function | ApiXbroomdev     | No Change | awscloudformation |
| Function | users            | No Change | awscloudformation |
| Api      | ApiX             | No Change | awscloudformation |
| Api      | users            | No Change | awscloudformation |
| Api      | dbpatch          | No Change | awscloudformation |
| Auth     | broomtestcognito | No Change | awscloudformation |
| Hosting  | S3AndCloudFront  | No Change | awscloudformation |
? Are you sure you want to continue? Yes
⠼ Updating resources in the cloud. This may take a few minutes...

UPDATE_COMPLETE    apiusers               AWS::CloudFormation::Stack Tue Jan 08 2019 12:11:27 GMT-

#removed output for brevity

UPDATE_COMPLETE functiondbpatch      AWS::CloudFormation::Stack Tue Jan 08 2019 12:11:54 GMT-0800 (Pacific Standard Time) 
✔ All resources are updated in the cloud

brian@nova:~/Documents/whoclean/repos/broom[skip-lambda-learn]$ amplify push

Current Environment: skiptest

| Category | Resource name    | Operation | Provider plugin   |
| -------- | ---------------- | --------- | ----------------- |
| Function | dbpatch          | Update    | awscloudformation |
| Function | ApiXbroomdev     | No Change | awscloudformation |
| Function | users            | No Change | awscloudformation |
| Api      | ApiX             | No Change | awscloudformation |
| Api      | users            | No Change | awscloudformation |
| Api      | dbpatch          | No Change | awscloudformation |
| Auth     | broomtestcognito | No Change | awscloudformation |
| Hosting  | S3AndCloudFront  | No Change | awscloudformation |
? Are you sure you want to continue? Yes

The "path" argument must be one of type string, Buffer, or URL. Received type object

This if then I try to build a function:

brian@nova:~/Documents/whoclean/repos/broom[skip-lambda-learn]$ amplify function build 
? Are you sure you want to continue building the resources? Yes
⠸ Building resources. This may take a few minutes...TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be one of type string, Buffer, or URL. Received type object
    at Object.statSync (fs.js:862:3)
    at isPackageOutdated (/usr/local/lib/node_modules/@aws-amplify/cli/node_modules/amplify-provider-awscloudformation/lib/build-resources.js:69:26)
    at buildResource (/usr/local/lib/node_modules/@aws-amplify/cli/node_modules/amplify-provider-awscloudformation/lib/build-resources.js:36:5)
    at Object.run (/usr/local/lib/node_modules/@aws-amplify/cli/node_modules/amplify-provider-awscloudformation/lib/build-resources.js:12:24)
    at process.internalTickCallback (internal/process/next_tick.js:77:7)
✖ An error occurred when building the resources.
TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be one of type string, Buffer, or URL. Received type object
    at Object.statSync (fs.js:862:3)
    at isPackageOutdated (/usr/local/lib/node_modules/@aws-amplify/cli/node_modules/amplify-provider-awscloudformation/lib/build-resources.js:69:26)
    at buildResource (/usr/local/lib/node_modules/@aws-amplify/cli/node_modules/amplify-provider-awscloudformation/lib/build-resources.js:36:5)
    at Object.run (/usr/local/lib/node_modules/@aws-amplify/cli/node_modules/amplify-provider-awscloudformation/lib/build-resources.js:12:24)
    at process.internalTickCallback (internal/process/next_tick.js:77:7)
There was an error building the function resources

Expected behavior

Expect push and build to succeed.

Research

If I diff the trees between what works and what does not work. The only non trivial diffs are in the amplify/backend/amplify-meta.json file.

subsequent to push each resouce has a section like

        "providerMetadata": {
          "s3TemplateURL": "https://s3.amazonaws.com/broom-20190106133834-deployment/amplify-cfn-templates/auth/broomtestcognito-cloudformation-template.yml",
          "logicalId": "authbroomtestcognito"
        }

If I swap out the amplify-meta.json with the pre push file, everything works again until the next push.

Versions

• OS: osx 10.14.2
• Browser chrome

brian@nova:~/Documents/whoclean/repos$ amplify --version
0.2.1-multienv.20

[kaustavghosh06]

Just merged the fix for this as a part of #749. It’s in the pipeline and shoud be deployed soon as a part of 0.2.1-multienv.35.

[brian-young-]

Here is the problem

The function getSourceFiles in @aws-amplify/cli/node_modules/amplify-provider-awscloudformation/lib/build-resources.js returns and array of arrays in my case. an array for every subdir below AMPLIFY_PROJECT/amplify/backend/functions/FUNCTION/src.

To fix the problem at line 65.

  let sourceFiles = getSourceFiles(resourceDir, 'node_modules');
  if (Array.isArray(sourceFiles)) {
    sourceFiles = sourceFiles.flat(1);
  }