#!/usr/bin/env python3

import os

import common
from shell_helpers import LF

class Main(common.BuildCliFunction):
    def _get_make_cmd(self):
        allowed_toolchains = ['buildroot']
        if self.env['arch'] == 'x86_64':
            arch = 'x86'
        else:
            arch = self.env['arch']
        return [
            'make', LF,
            '-j', str(self.env['nproc']), LF,
            '-f', 'Makefile.{}'.format(arch), LF,
            'CC={}'.format(self.env['gcc_path']), LF,
            'CROSS_COMPILE={}'.format(self.env['toolchain_prefix_dash']), LF,
            'LD={}'.format(self.env['ld_path']), LF,
            'PWD={}'.format(self.env['gem5_m5_source_dir']), LF,
        ]

    def build(self):
        os.makedirs(self.env['gem5_m5_build_dir'], exist_ok=True)
        # We must clean first or else the build outputs of one arch can conflict with the other.
        # I should stop being lazy and go actually patch gem5 to support out of tree m5 build...
        self.clean()
        self.sh.run_cmd(
            self._get_make_cmd(),
            cwd=self.env['gem5_m5_source_dir'],
        )
        os.makedirs(self.env['out_rootfs_overlay_bin_dir'], exist_ok=True)
        self.sh.cp(
            os.path.join(self.env['gem5_m5_source_dir'], 'm5'),
            self.env['out_rootfs_overlay_bin_dir']
        )

    def clean(self):
        self.sh.run_cmd(
            self._get_make_cmd() + ['clean', LF],
            cwd=self.env['gem5_m5_source_dir'],
        )
        return None

if __name__ == '__main__':
    Main().cli()