chore(commons): Create a common package

[flochaz]

Description

in order to simplify modules packaging, creating a common module for shared elements such as interfaces, types , test events etc.

Related issues, RFCs

#316

PR status

Is this ready for review?: YES
Is it a breaking change?: NO

Checklist

• My changes meet the tenets criteria
• I have performed a self-review of my own code
• I have commented my code where necessary, particularly in areas that should be flagged with a TODO, or hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• The code coverage hasn't decreased
• I have added tests that prove my change is effective and works
• New and existing unit tests pass locally and in Github Actions
• Any dependent changes have been merged and published in downstream module
• The PR title follows the conventional commit semantics

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[dreamorosi]

I know it's a draft, just leaving this here so I don't forget.

Reviewed the files and it's looking good!

Only note is to update the README.md file to match the content of this new common package.

[saragerion]

I think we can remove all eslint config files outside of the root folder.
I did some research and eslint is smart enough to navigate to all the parent folders to look for a valid config file and use that one. We can leave the one at the root and set the value root = true in the file:
https://eslint.org/docs/user-guide/configuring/configuration-files#cascading-and-hierarchy
After that you can simply do the same in your IDE (webstorm works)

aws-lambda-powertools-typescript
├── package.json
├── .eslintrc -> setting `root` = `true`
├── packages

[flochaz]

yep but there is a lot to fix

[flochaz]

so préfères to keep it for a dedicated pr

[saragerion]

I made some changes in the middleware branch: removed the deadbeef references and improved consistency of values:
arn:aws:lambda:eu-central-1:123456789012:function:Example -> arn:aws:lambda:eu-central-1:123456789012:function:foo-bar-function

#313

Happy to repeat it in yours if you want

[saragerion]

Thanks Florian! Can you add an example on how can we leveage the shared resources like the tsconfig file in the commons package in another package?

[flochaz]

Thanks Florian! Can you add an example on how can we leveage the shared resources like the tsconfig file in the commons package in another package?

you have a usage example in #316