Packaging: Support customization of source directory

[tamsler]

Use case description

The serverless.yml package section should allow to define a codeUri which will be use as the base path for generating the zip archive.

e.g. Code
src/handler/index.js
src/lib/service.js

serverless.yml
package:
codeUri: ./src

this would generate a zip archive containing:
handler/index.js
lib/service.js

Proposed solution

e.g. Sample Code
src/handler/index.js
src/lib/service.js

serverless.yml
package:
codeUri: ./src

this would generate a zip archive containing:
handler/index.js
lib/service.js

This would be a similar capability that AWS SAM offers via: CodeUri: ./src
https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-resource-function.html

[medikoo]

@tamsler thanks for proposal. I would probably name it as package.sourceDir, and support it in both top level package setting and individual function setting (which could be used if package.individually is turned on).

Note that we also plan to improve packaging (#6580) so only modules used by lambda are packaged, and that will naturally address your use case.

[heetu]

Guys, Any Update?

[medikoo]

@heetu PR that brings this feature in is welcome!