aws/jsii

Elad Ben-Israel

@eladb

Hello!

Simon

@stowns

hi all, I just began using jsii to try and build a cdk lib. I'm having an issue when trying to add a non @aws-cdk dependency. I'm able to add additional aws deps like @aws-cdk/aws-codepipeline but if I add js-yaml lodash etc project-info.js throws an Error: Error: Unable to locate module:

Error: Error: Unable to locate module: lodash
    at _tryResolveAssembly (/Users/townsimo/dev/cdk-ml-pipeline/ml-ops-lib/node_modules/jsii/lib/project-info.js:201:15)
    at _loadDependencies (/Users/townsimo/dev/cdk-ml-pipeline/ml-ops-lib/node_modules/jsii/lib/project-info.js:126:21)

i can confirm that the module is listed in both dependencies and peerDependencies as well as installed to the node_modules dir

any idea why it may be unable to locate it?

cdk 1.21.1 with "jsii": "^0.21.1" and node v10.16.3

Elad Ben-Israel

@eladb

You will need to bundle it by specifying “bundledDependnecies” in your package.json

@RomainMuller is this documented somewhere?

Romain Marcadier-Muller

@RomainMuller

I think it is but let me double check that

Simon

@stowns

ah yes that is here https://github.com/aws/jsii/blob/fc366d0a461473e1e6caeb85117098c708d191da/docs/configuration.md under 'Dependencies that are not jsii modules'

Simon

@stowns

are there any jsii-pacmak rules against re-exporting an interface from the main index.ts class? I have a cfg.ts where i define various interfaces and i'd like it to be available for import from my library ie import { SomeCfg } from 'my-lib' but I'm getting a pacmak error on npm run package

Error: Cannot find type 'aws-ml-ops.MLOpsCfg' either as internal or external type at PythonGenerator.findType (.../aws-ml-ops/node_modules/jsii-pacmak/lib/generator.js:391:19)

my index.ts has

import { MLOpsCfg } from './cfg';
export { MLOpsCfg } from './cfg';

Simon

@stowns

i refactored and pulled all of the .cfg interfaces into index.ts and exported them directly and it seems to be happy w/ that

Matthew Bonig

@mbonig

I'm trying to create a JSII construct that has an interface like this:

export interface CicdSpaWebsiteProps extends StackProps {
    /**
     * a limited schema version of GitHubSourceActionProps
     */
    readonly githubSource: {
        /**
         * The GitHub account/user that owns the repo.
         */
        "owner": string;
        /**
         * The name of the repo, without the username.
         */
        "repo": string;
        /**
         * The branch to use.
         *
         * @default "master"
         */
        "branch"?: string;
        /**
         * A GitHub OAuth token to use for authentication.
         *
         * It is recommended to use a Secrets Manager `Secret` to obtain the token:
         *
         *   const oauth = cdk.SecretValue.secretsManager('my-github-token');
         *   new GitHubSource(this, 'GitHubAction', { oauthToken: oauth, ... });
         */
        "oauthToken": SecretValue;
    }

}

however, when I jsii build the package I get this error:

error TS9999: JSII: Only string index maps are supported

Is there a simple change I can make to support this shape of my interface or would I need to flatten those fields?

Elad Ben-Israel

@eladb

You’ll have to define the inner type as a separate interface

Matthew Bonig

@mbonig

@eladb :thumbsup:

Daniel Schroeder

@udondan

i could use a pointer how to add js assets to my jsii package. i have a lambda/index.ts which i would like to include in the package. the built packages though do not include the lambda directory. i looked at the cdk packages and found examples there, e.g. https://github.com/aws/aws-cdk/tree/c7197c0048474f69e253b752e289abad6e72554f/packages/%40aws-cdk/aws-s3-deployment - this seems to only work because the lambda function is written in python. how can i add a ts/js based lambda to my package?

7 replies

i guess i could add a build step and zip the content up and then use the zip as my lambda source instead of the directory

Mitch McKenzie

@mitchmckenzie

Has anyone used TypeScript decorators with aws constructs and successfully generated the consumer libs for all of the supported languages?

Will

@LMJW

Hi Guys. Is there anyway that I can use jsii to compile code with "ts-polyfill": "3.8.2" dependency? I was trying to use ES2019 Array in my code and it doesn't compile.

ChrisC413

@ChrisC413

Hello, I am having some trouble importing the python module generated by the example on the jsii git homepage. I am using a virtual env and ran python setup.py install. I'm using pycharm and can see the package acme.hello-jsii in the interpreter but cannot get my import statement to resolve. I do see the .egg file in .virtualenvs/myenv/lib/python3.6/site-packages . What exactly should my import statement be?

2 replies

Maksim Terekhin

@Neurostep

Hi All, I am currently experimenting with jsii. My basic idea is to provide interop for Golang and NodeJs in order to call functions form Readability JS library (https://github.com/mozilla/readability) via Golang. To do that, I wrapped Readability JS into tiny Typescript file. Currently, when I run npx jsii I got compilation errors

node_modules/@mozilla/readability/index.d.ts:6:13 - error TS2304: Cannot find name 'Document'.

6   document: Document,

The same goes for jsdom library. I am fairly new to modern Javascript/Typescript setup I might be doing something wrong regarding this. Or maybe my idea is even impossible to cover with jsii. Could someone help me understand that? Thanks a lot 🙏

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