Packaging lambda function failed with the error: tsc: command not found

[DiegoMcDipster]

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App Id

d39mjfc3kkuapk

AWS Region

eu-central-1

Amplify Hosting feature

Deployments

Describe the bug

I have an existing amplify app for my dev backend. That env works fine.

If I add a new 'test' amplify env using amplify env add. I cannot deploy it because it fails with the error:
Packaging lambda function failed with the error
Command failed with exit code 127: npm run-script amplify:testHostingFn
sh: tsc: command not found
> [email protected] amplify:testHostingFn
> cd amplify/backend/function/testHostingFn && tsc -p ./tsconfig.json && cd -

Expected behavior

The new test environment should be deployed

Reproduction steps

1. created next app -ts

2. created repo on code commit

3. pushed to code commit

4. initiated amplify

5. connected branch to amplify hosting

6. added amplify REST api & lambda express function

7. amplify push the BE

8. created app.ts & ts config etc according to https://docs.amplify.aws/cli/function/build-options/

9. amplify push

10. git commit and push - to kick off CICD

11. error during FE build cos of express already being declared as block scoped variable.

    • fix: exclude 'amplify' on main tsConfig.json

12. git commit and push - to kick off CICD
    *** ALL Good up to now. env is deployed! ***

13. create test env following the insturctions: https://docs.amplify.aws/cli/teams/overview/#continuous-deployment-and-hosting

    • amplify add env -> test
    • amplify push
    • create git test branch and push

14. create hosting for test branch in amplify console.
    Build fails: error:
    Packaging lambda function failed with the error
    Command failed with exit code 127: npm run-script amplify:testHostingFn
    sh: tsc: command not found

    [email protected] amplify:testHostingFn
    cd amplify/backend/function/testHostingFn && tsc -p ./tsconfig.json && cd -

Build Settings

No response

Log output

# Put your logs below this line

Additional information

No response

[DiegoMcDipster]

I thought this may be a NextJs issue so i created a test app following the steps above with create-react-app. And I have the exact same issue. AppId: dtf5rnawhfgkc

[DiegoMcDipster]

The solution is to compile the js outside the src folder of the lambda function.

Creating the TS lambda's using these instructions solved the problem: aws-amplify/amplify-cli#6398 (comment)

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