Spacewalk: Add type checking with TypeScript #50
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| module.exports = { and, equals, 'if': _if, not, or, notEquals }; |
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Notice 'if': _if here to deal with if being a reserved word.
| const template = { | ||
| AWSTemplateFormatVersion: '2010-09-09', | ||
| /** |
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These @type {object} are needed to allow for subsequent addition of more properties on each of these objects. Otherwise tsc treats each one as an independent type that should not have keys added/removed.
| - [ServiceRole][14] | ||
| - [Parameters][15] | ||
| - [Properties][16] | ||
| - [LambdaOptions][1] |
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Unfortunately this markdown file generated from documentationjs has become a lot less readable because documentationjs does not currently handle constructor-level parameter annotations.
If we want it to, we should submit a fix for documentationjs/documentation#1091
| @@ -32,7 +34,12 @@ const Lambda = require('./lambda'); | |||
| * module.exports = cf.merge(myTemplate, lambda); | |||
| */ | |||
| class QueueLambda extends Lambda { | |||
| constructor(options = {}) { | |||
| /** | |||
| * @param {QueueLambdaOptions & LambdaOptions} options configuration options for the scheduled Lambda | |||
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Example situation of creating a union type for inherited constructor options.
| @@ -2,18 +2,20 @@ | |||
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| const Lambda = require('./lambda'); | |||
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| /** | |||
| * @typedef { import('./lambda').LambdaOptions } LambdaOptions | |||
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Neat - we can import the base Lambda class's typedef for its constructor options arg.
| @@ -0,0 +1,49 @@ | |||
| import build = require('./lib/build'); | |||
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This file defines the methods and properties of module-level export, ie, everything that will be available at cf.[NAME] after doing const cf = require('@mapbox/cloudfriend').
I am not fully sure why these could not be inferred by tsc. Perhaps there is a way to make that happen but I could not figure it out, so explicitly defining everything in this index.d.ts is how I had to do it.
| import build = require('./lib/build'); | ||
| import validate = require('./lib/validate'); | ||
| import merge = require('./lib/merge'); | ||
| import shortcuts = require('./lib/shortcuts'); |
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It is nice that we can require our JavaScript modules and TypeScript/IntelliSense will use all the JSDoc annotations defined in those files/modules!
This PR adds JavaScript type checking using TypeScript via JSDoc comments.
It is part of a Platform Spacewalk and is not necessarily meant to be merged.