I just recently started using Amazon's AWS basic plan, I am using the AWS-Amplify for uploading react applications and I usually used yarn with create react-app. I am not sure if it has conflicts with the AWS tutorial using npm but I got it right and had success with the building and deployment. However, when I added the Auth functionalities it only worked on my local but the build fails on deployment. This is the error log:
2020-06-23T17:07:34.078Z [INFO]: Git SSH Key acquired
2020-06-23T17:07:34.155Z [INFO]: # Cloning repository: [email protected]:mav1283/amplifyapp.git
2020-06-23T17:07:34.273Z [INFO]: Agent pid 131
2020-06-23T17:07:34.329Z [INFO]: Identity added: /root/.ssh/git_rsa (/root/.ssh/git_rsa)
2020-06-23T17:07:34.558Z [INFO]: Cloning into 'amplifyapp'...
2020-06-23T17:07:35.697Z [INFO]: Warning: Permanently added the RSA host key for IP address '13.229.188.59' to the list of known hosts.
2020-06-23T17:07:38.298Z [INFO]: # Switching to commit: 2d93cd9fca8f302a1390bce33985acccf97a8263
2020-06-23T17:07:38.388Z [INFO]: Note: checking out '2d93cd9fca8f302a1390bce33985acccf97a8263'.
You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by performing another checkout.
If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -b with the checkout command again. Example:
git checkout -b <new-branch-name>
HEAD is now at 2d93cd9 add auth
2020-06-23T17:07:38.389Z [INFO]: # Checking for Git submodules at: /codebuild/output/src043707224/src/amplifyapp/.gitmodules
2020-06-23T17:07:38.411Z [INFO]: # Retrieving cache...
2020-06-23T17:07:40.086Z [INFO]: # Extracting cache...
2020-06-23T17:07:43.479Z [INFO]: # Extraction completed
2020-06-23T17:07:43.604Z [INFO]: # Retrieving environment cache...
2020-06-23T17:07:43.642Z [INFO]: # Retrieved environment cache
2020-06-23T17:08:17.476Z [INFO]: ## Starting Frontend Build
# Starting phase: preBuild
# Executing command: yarn install
2020-06-23T17:08:18.203Z [INFO]: yarn install v1.16.0
2020-06-23T17:08:18.305Z [INFO]: [1/4] Resolving packages...
2020-06-23T17:08:18.838Z [INFO]: [2/4] Fetching packages...
2020-06-23T17:08:48.710Z [INFO]: info [email protected]: The platform "linux" is incompatible with this module.
2020-06-23T17:08:48.712Z [INFO]: info "[email protected]" is an optional dependency and failed compatibility check. Excluding it from installation.
2020-06-23T17:08:48.719Z [INFO]: info [email protected]: The platform "linux" is incompatible with this module.
2020-06-23T17:08:48.723Z [INFO]: info "[email protected]" is an optional dependency and failed compatibility check. Excluding it from installation.
info [email protected]: The platform "linux" is incompatible with this module.
info "[email protected]" is an optional dependency and failed compatibility check. Excluding it from installation.
2020-06-23T17:08:48.728Z [INFO]: [3/4] Linking dependencies...
2020-06-23T17:08:48.732Z [WARNING]: warning "@aws-amplify/ui-react > @aws-amplify/[email protected]" has unmet peer dependency "@aws-amplify/auth@^2.1.5".
warning "@aws-amplify/ui-react > @aws-amplify/[email protected]" has unmet peer dependency "@aws-amplify/core@^2.2.4".
warning "@aws-amplify/ui-react > @aws-amplify/[email protected]" has unmet peer dependency "@aws-amplify/xr@^1.1.5".
warning " > @testing-library/[email protected]" has unmet peer dependency "@testing-library/dom@>=5".
2020-06-23T17:08:48.734Z [WARNING]: warning "aws-amplify > @aws-amplify/[email protected]" has incorrect peer dependency "@aws-amplify/pubsub@^2.1.1".
warning "aws-amplify > @aws-amplify/[email protected]" has unmet peer dependency "@react-native-community/netinfo@^5.5.0".
warning "aws-amplify > @aws-amplify/api > @aws-amplify/[email protected]" has incorrect peer dependency "@aws-amplify/pubsub@^2.1.1".
2020-06-23T17:08:48.736Z [WARNING]: warning "react-scripts > @typescript-eslint/eslint-plugin > [email protected]" has unmet peer dependency "typescript@>=2.8.0 || >= 3.2.0-dev || >= 3.3.0-dev || >= 3.4.0-dev || >= 3.5.0-dev || >= 3.6.0-dev || >= 3.6.0-beta || >= 3.7.0-dev || >= 3.7.0-beta".
2020-06-23T17:08:56.100Z [INFO]: [4/4] Building fresh packages...
2020-06-23T17:08:57.025Z [INFO]: Done in 38.83s.
2020-06-23T17:08:57.047Z [INFO]: # Completed phase: preBuild
# Starting phase: build
# Executing command: yarn run build
2020-06-23T17:08:57.210Z [INFO]: yarn run v1.16.0
2020-06-23T17:08:57.237Z [INFO]: $ react-scripts build
2020-06-23T17:08:58.125Z [INFO]: Creating an optimized production build...
2020-06-23T17:08:59.577Z [INFO]: Failed to compile.
2020-06-23T17:08:59.579Z [INFO]: ./src/index.js
Cannot find file './aws-exports' in './src'.
2020-06-23T17:08:59.596Z [WARNING]: error Command failed with exit code 1.
2020-06-23T17:08:59.597Z [INFO]: info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
2020-06-23T17:08:59.602Z [ERROR]: !!! Build failed
2020-06-23T17:08:59.677Z [ERROR]: !!! Non-Zero Exit Code detected
2020-06-23T17:08:59.677Z [INFO]: # Starting environment caching...
2020-06-23T17:08:59.678Z [INFO]: # Environment caching completed
Terminating logging...
Creating the service role and changing the CLI version worked for me. If you do one and not the other you will not solve the problem. So create the service role and update the CLi version in the advanced settings to latest. That will work like magic.