#!/usr/bin/env python3

import os
import subprocess

import common
import shutil
from shell_helpers import LF

class Main(common.BuildCliFunction):
    def __init__(self):
        super().__init__(
            description='''\
Download and build Android AOSP.

https://cirosantilli.com/linux-kernel-module-cheat#android
'''
        )
        self.add_argument(
            '--extra-args',
            default='',
        )
        self.add_argument(
            'targets',
            default=['build'],
            nargs='*',
        )

    def build(self):
        if 'download' in self.env['targets']:
            os.makedirs(self.env['android_dir'], exist_ok=True)
            # Can only download base64. I kid you not:
            # https://github.com/google/gitiles/issues/7
            self.sh.wget(
                'https://android.googlesource.com/tools/repo/+/v2.8/repo?format=TEXT', 
                self.env['repo_path_base64'],
            )
            with open(self.env['repo_path_base64'], 'r') as input, \
                open(self.env['repo_path'], 'w') as output:
                output.write(self.sh.base64_decode(input.read()))
            self.sh.chmod(self.env['repo_path'])
            self.sh.run_cmd(
                [
                    self.env['repo_path'], LF,
                    'init', LF,
                    '-b', 'android-{}'.format(self.env['android_version']), LF,
                    '--depth', '1', LF,
                    '-u', 'https://android.googlesource.com/platform/manifest', LF,
                ],
                cwd=self.env['android_dir'],
            )
            self.sh.run_cmd(
                [
                    self.env['repo_path'], LF,
                    'sync', LF,
                    '-c', LF,
                    '-j', str(self.env['nproc']), LF,
                    '--no-tags', LF,
                    '--no-clone-bundle', LF,
                ],
                cwd=self.env['android_dir'],
            )
        if 'build' in self.env['targets']:
            # The crappy android build system requires
            # https://stackoverflow.com/questions/7040592/calling-the-source-command-from-subprocess-popen
            self.sh.run_cmd('{}USE_CCACHE=1 make -j {} {}'.format(
                    self.env['android_shell_setup'],
                    self.env['nproc'],
                    self.env['extra_args']
                ),
                cwd=self.env['android_dir'],
                executable=shutil.which('bash'),
                shell=True,
            )

    def get_build_dir(self):
        return self.env['android_build_dir']

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