Infer more defaults in platformio.ini

[pelikhan]

Make the platform command line easier to use by providing more defaults for 'well-known' boards like the uno. If the user specifies that he is using an Arduino Uno, the platform and framework can be inferred.

[ivankravets]

PlatformIO was developed like a cross-platform code builder. The board option was implemented later. There is no reverse compatibility from BOARD->FRAMEWORK->PLATFORM. Because the different platforms/frameworks can have the same "board" name (theoretically).

In general, this works like:

1. If board is specified, then go to step 2
2. Check if framework is defined, if yes go to 3
3. Check if framework has boards.txt file, if yes, go to 4
4. Parse board.txt and lookup for board's options by board value.

I think there is no big problem to define 2 lines with platform and framework 😄

Thanks a lot for your issues and ideas! 👍

[pelikhan]

From the user perspective, it adds friction. What about:

1. if (1), then go to (1.5)

1.5. if not framework, infer framework, go to (2)

you get the idea ;)

[ivankravets]

I've just re-written some of PlatformIO parts from the scratch (future 0.9.0 release). I hope I will find time to implement your proposition. Thanks 👍

[ivankravets]

Updated Quickstart.

See new options for platformio init command.

If you use PlatformIO for "Cloud Compiling", then you can initialise project for the specified boards with disabled "auto-uploading" feature:

$ platformio init --board uno --board=Engduino3 --disable-auto-uploading

P.S: Thanks a lot for your ideas! Now, the updated Quickstart looks REALLY SIMPLE and EASY :)

[ivankravets]

@pelikhan If it isn't hard for you, can you try and verify all your reported issues which are fixed in 0.10.0 Milestone? I want to release it tomorrow.

# firstly, uninstall current version of PlatformIO
$ pip uninstall platformio

# then install development version
$ pip install https://github.com/ivankravets/platformio/archive/develop.zip

P.S: Don't forget to downgrade to stable release (0.9.x) after testing. Thanks a lot!