espidf-arduino-blink example uncompilable because of missing branch

Per https://github.com/espressif/arduino-esp32/issues/5007 and https://github.com/espressif/arduino-esp32/issues/4998

The espidf-arduino-blink is uncompilable because the referenced #idf-release/v4.0 was killed in the repo.

https://github.com/platformio/platform-espressif32/blob/b9530d31e4f8dfe00b31994c70b1ac96d82346cb/examples/espidf-arduino-blink/platformio.ini#L16-L18

[Jason2866]

@apwwn the branch esp32s2 is now integrated in master and so not needed anymore. You can easily define boards yourself. Just place your boards.json in folder boards in root of Platformio project. I have done this for project Tasmota

[maxgerhardt]

@valeros people are still hitting this issue, see e.g. community topic. Please update the branches / build system of the Arduino+ESP-IDF examples? It’s indeed bad that Arduino-ESP32 deletes branches at any time, so maybe a backup fork would be good 🤔

Edit: Ah I see that the example has switched to

https://github.com/platformio/platform-espressif32/blob/56f9c60081fadd2100330732ee27691981be5bb9/examples/espidf-arduino-blink/platformio.ini#L16-L18

but can we also get support for building the master branch of Arduino-ESP32 with the there-in referenced ESP-IDF version, more dynamically? (E.g., more easily changable ESP-IDF versions by commit-id instead of being able to use only what’s in the package repository – can’t use the esp-idf repo directly because they have no package.json)