I develop on renesas-ra platform and it uses email@example.com package. The package is based on GitHub - arduino/ArduinoCore-renesas repository. The latest release in the repo is 1.0.5 however.
How can I create my own package firstname.lastname@example.org out of it and use it in the project?
I think you can download the 1.0.5 release like the Arduino IDE does with it’s default pacakges.
Extract it somewhere (7zip). Then copy over the old
C:\Users\<user>\.platformio\packages\framework-arduinorenesas-portenta\package.json to where you extracted it, at the same directory level as the
platform.txt. Change the version field in that copied
package.json accordingly to indicate 1.0.5.
You should then be able to point PlatofrmIO to this package with platform_packages in the
platformio.ini of the project:
(adapt path to where the folder where the
package.json is accordingly.)