Github user filmaj commented on a diff in the pull request: https://github.com/apache/cordova-test-platform/pull/1#discussion_r128837509 --- Diff: PlatformRequirements.md --- @@ -0,0 +1,144 @@ + +# New Platform Checklist + +## Stand-alone scripts + +bin/create scripts +- bin/create _(typically a node script)_ +- bin/create.bat for windows + - windows .bat file typically just calls bin/create with node + +bin/update +- not entirely sure this code is run, or needs to exist with newish non-destructive platform updates + +## Package Expectations + +- Platforms must have a package.json in their root. +- Package.json exports a 'main', usually `"main": "src/cordova/Api.js"` + - This allows other modules to simply require() the path to this platform and get access to the Api. + +## Api (Platform) Expectations +- The PlatformApi class + - The PlatformApi class is an abstraction around a particular platform that exposes all the actions, properties, and methods for this platform so they are accessible programmatically. + - It can install & uninstall plugins with all source files, web assets and js files. + - It exposes a single 'prepare' method to provide a way for cordova-lib to apply a project's setting/www content to the platform. + - The PlatformApi class should be implemented by each platform that wants to use the new API flow. For those platforms, which don't provide their own PlatformApi, there will be a polyfill in cordova-lib. + - Platforms that implement their own PlatformApi instance should implement all prototype methods of this class to be fully compatible with cordova-lib. + - The PlatformApi instance should define the following field: + - platform : This is a String that defines a platform name. + +- Api.js exports static functions + - there is currently a requirement that the file be called Api.js (todo:change that) + + +- Api.js exports static function `updatePlatform(destination, options, events);` + - PlatformApi.updatePlatform = function (cordovaProject, options) {}; + - The `updatePlatform` method is equal to the bin/update script. It should update an already installed platform. It should accept a CordovaProject instance, that defines a project structure and configuration, that should be applied to the new platform, and an options object. + - cordovaProject: This is a CordovaProject instance that defines a project structure and configuration, that should be applied to the new platform. This argument is optional and if not defined, that platform is used as a standalone project and not as part of a Cordova project. + - options : This is an options object. The most common options are : + - options.customTemplate : This is a path to custom template, that should override the default one from platform. + - options.link : This is a flag that should indicate that the platform's sources will be linked to the installed platform instead of copying. + - The `updatePlatform` method must return a promise, which is either fulfilled with a PlatformApi instance or rejected with a CordovaError. + +- Api.js exports static function `createPlatform(destination, cfg, options, events);` + - PlatformApi.createPlatform = function(cordovaProject, options) {}; + - The `createPlatform method` is equal to the bin/create script. It should install the platform to a specified directory and create a platform project. It should accept a CordovaProject instance, that defines a project structure and configuration, that should be applied to the new platform, and an options object. + - cordovaProject : This is a CordovaProject instance that defines a project structure and configuration, that should be applied to the new platform. This argument is optional and if not defined, that platform is used as a standalone project and not as part of a Cordova project. + - options : This is an options object. The most common options are : + - options.customTemplate : This is a path to custom template, that should override the default one from the platform. + - options.link : This is a flag that should indicate that the platform's sources will be linked to the installed platform instead of copying. + - The `createPlatform` method must return a promise, which is either fulfilled with a PlatformApi instance or rejected with a CordovaError. + +The way most platforms work is somewhat tricky. The Api.js could be anywhere in the platform repo, ex. /templates/cordova/Api.js . When a new project is created for the platform, the platform copies this file (and supporting files ) to destination/cordova/Api.js. The project expectations demand that the Api.js file be available at /projectRoot/platforms/platform-name/cordova/Api.js. + +A call to the platforms static Api.createPlatform will +1. Copy template files to destination (according to cfg, options). +1. Copy the file Api.js (and supporting modules) to destination/cordova/Api.js. +1. Return a promise that will eventually resolve with an instance of the newly copied Api.js. + - This step is a bit confusing because at this point in time we have 2 Api.js in memory, one from the platform folder which has static methods, and one from the new project folder which has instance methods. + - Similarly, they may have their own require() statements, and while typically require would return the same instance, because our modules are loaded from different paths, they get different relative requires also. + + +## Api (Project) Expectations + +- Api.js exports a constructor function + var Api = require('path/Api.js'); + var api = new Api(); // This should work, although it's not typical usage. --- End diff -- Why is this not typical usage? Worth pointing out?
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