Arduino-cli: How to add URL for other boards?

[gdsports]

I see board_manager in .cli_config.yml but I cannot figure out the syntax to add a board URL for Adafruit or ESP8266.

The IDE can do this from the command line like this. I am converting a script using the IDE command line to the new arduino-cli.

./arduino --pref "boardsmanager.additional.urls=https://adafruit.github.io/arduino-board-index/package_adafruit_index.json" --save-prefs

[machadolab]

I have the same question. I tried editing ./.cli-config.yml manually to edit the board_manager setting, after saving that and running arduino-cli core update-index and then searching for a new core, no core from the new URL is found.

[laleporo]

You can find the correct config names in yaml_serializer.go: it's additional_urls.
So to add the esp board, you have to change board_manager: null to

board_manager:
  additional_urls:
    - http://arduino.esp8266.com/stable/package_esp8266com_index.json

[gdsports]

Thanks, I tried it and it works fine.