generating interface ABIs does not respect solc version in brownie-config.yaml

[gosuto-inzasheru]

Environment information

• brownie Version: 1.16.2
• ganache-cli Version: 6.12.2
• solc Version: 0.6.12
• Python Version: 3.9.6
• OS: macos

What was wrong?

when compiling, generating the ABIs does not respect the solc version set in brownie-config.yaml:

compiler:
    solc:
        version: 0.6.12

$ brownie compile --all

Brownie v1.16.2 - Python development framework for Ethereum

Compiling contracts...
  Solc version: 0.6.12
  Optimizer: Enabled  Runs: 200
  EVM Version: Istanbul
Generating build data...
[...]

Generating interface ABIs...
CompilerError: solc returned the following errors:

ParserError: Source file requires different compiler version (current compiler is 0.8.4+commit.c7e474f2.Darwin.appleclang) - note that nightly builds are considered to be strictly less than the released version
 --> interfaces/erc20/IERC20.sol:3:1:
  |
3 | pragma solidity ^0.6.0;
  | ^^^^^^^^^^^^^^^^^^^^^^^

via https://ethereum.stackexchange.com/a/102669/3426

How can it be fixed?

still digging through the code, but i believe .get_abi needs to check the config file or get passed a solc version before setting solc_sources based on the contract_sources dict.