[FEATURE] manifest.json: Auto-fill supportedLocales

[flovogt]

After the UI5 Tooling build, the supportedLocales property in the manifest.json of a UI5 library/application will be filled automatically with the available locales determined by the existence of the respective .properties file.

To disable the automatic generation of the supportedLocales, set supportedLocales to any desired value.

Scenario: Application

- webapp/i18n/
  - i18n.properties
  - i18n_en.properties
  - i18n_en_US.properties
  - i18n_de.properties
  - i18n_de_DE.properties 

In the manifest.json the supportedLocales property will be enhanced as following:

Source

"models": {
  "i18n": {
    "type": "sap.ui.model.resource.ResourceModel",
    "settings": {
	    "bundleName": "sap.ui.demo.todo.i18n.i18n"
    }
 }

Build Result

"models": {
  "i18n": {
    "type": "sap.ui.model.resource.ResourceModel",
    "settings": {
	    "bundleName": "my.app.i18n.i18n"
	    "supportedLocales": [
                 "",
                  "de",
                  "de_DE",
                  "en",
                  "en_US"
	    ]
    }
 }

JIRA: CPOUI5FOUNDATION-296

Depends on:

• [FEATURE] manifest.json: Auto-fill supportedLocales ui5-server#617
• [FEATURE] manifest.json: Auto-fill supportedLocales ui5-project#683

Demo: SAP/openui5-sample-app#220

[coveralls]

coverage: 94.811% (+0.2%) from 94.642%
when pulling 9c3f46d on manifest-transformer
into d59f0ac on main.

[RandomByte]

Just a few small findings

outdated

[matz3]

LGTM