Plugin `create` and `onConfigurationChanged` config-confusion

[neurolag]

TypeScript Version: 3.7.x-dev.20200318

Search Terms:

• Plugin
• Configuration
• Global Plugin

Code
https://github.com/manuth/TypeScriptESLintPlugin/tree/2e55e4533755ec6cadce9b980e23c140494a1ddf

export = ({ typescript }) => {
    return {
        create: (createInfo) => {
            console.log(createInfo.config);
        },
        onConfigurationChanged: (config) => {
            console.log(config);
        }
}

When working with local plugins only, each time I update the tsconfig.json-file, create is invoked with its createInfo.config set to the configuration I set in the tsconfig.json-file.

When enabling the plugin globally, creationInfo.config is set to the tsconfig.json-file only the very first time. In all consequent invokations the createInfo.config-object looks as followed:

{ name: "typescript-eslint-plugin" }

It gets overwritten at this piece of code:

TypeScript/src/server/project.ts

Lines 1470 to 1475 in ba39113

	if (configurationOverride) {
	// Preserve the name property since it's immutable
	const pluginName = pluginConfigEntry.name;
	pluginConfigEntry = configurationOverride;
	pluginConfigEntry.name = pluginName;
	}

Expected behavior:
I'd expect TypeScript to invoke onConfigurationChanged each time a global configuration (a config-override) changes and to invoke create each time the plugin changes in tsconfig.json with createInfo.config set to the configuration inside the tsconfig.json file.

Actual behavior:
Though onConfigurationChanged is invoked each time a global configuration changes and create is called each time the tsconfig.json-file changes, the createInfo.config-object only contains the tsconfig.json-settings the very first time. That way I cannot load future changes that are made to the tsconfig.json.

[sheetalkamat]

Duplicate of #28969