Fix eslint failing with TypeError when default export is not an object

[js07]

Changelog

• Fix eslint failing with TypeError when default export is not an object (with properties)
• Refactor reused logic for getting component from CJS and ESM files into separate function

Context

When linting .mjs files with a default export that is not an object, ESLint throws TypeError: Cannot read property 'map' of undefined.
This error happens because propertyArray.map() is called in cases where propertyArray could be undefined instead of an array. Specifically, in component checks where isDefaultExport(node), but node.declaration is something other than an ObjectExpression (e.g. an ArrayExpression), node.declaration.properties (i.e. component.properties) is undefined.

For example:
ESLint would fail when linting this file (region-data.mjs):

export default [
  "GLOBAL",
  "US",
  "AR",
  "AU",
]

• ESLint: 7.26.0
• eslint-plugin-pipedream: 0.2.2

To reproduce:

1. Clone https://github.com/PipedreamHQ/pipedream
2. Checkout commit 5e5832e81ba8fd2a1f55745221ff480ea41257e3 of branch feature/reddit-new-actions
3. Install dependencies

npm ci

4. Run ESLint

npx eslint components/reddit

[dylburger]

Thank you @js07 , looks great. Could you rev the package version and I'll publish?

[js07]

Bumped the package version, @dylburger :)

[dylburger]

Thanks, publishing to npm now