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# Development tool - build command plugin
#
# Copyright (C) 2014-2015 Intel Corporation
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
"""Devtool build plugin"""

import os
import bb
import logging
import argparse
import tempfile
from devtool import exec_build_env_command, check_workspace_recipe, DevtoolError

logger = logging.getLogger('devtool')


def _set_file_values(fn, values):
    remaining = list(values.keys())

    def varfunc(varname, origvalue, op, newlines):
        newvalue = values.get(varname, origvalue)
        remaining.remove(varname)
        return (newvalue, '=', 0, True)

    with open(fn, 'r') as f:
        (updated, newlines) = bb.utils.edit_metadata(f, values, varfunc)

    for item in remaining:
        updated = True
        newlines.append('%s = "%s"' % (item, values[item]))

    if updated:
        with open(fn, 'w') as f:
            f.writelines(newlines)
    return updated

def _get_build_tasks(config):
    tasks = config.get('Build', 'build_task', 'populate_sysroot,packagedata').split(',')
    return ['do_%s' % task.strip() for task in tasks]

def build(args, config, basepath, workspace):
    """Entry point for the devtool 'build' subcommand"""
    workspacepn = check_workspace_recipe(workspace, args.recipename, bbclassextend=True)

    if args.clean:
        # use clean instead of cleansstate to avoid messing things up in eSDK
        build_tasks = ['do_clean']
    else:
        build_tasks = _get_build_tasks(config)

    bbappend = workspace[workspacepn]['bbappend']
    if args.disable_parallel_make:
        logger.info("Disabling 'make' parallelism")
        _set_file_values(bbappend, {'PARALLEL_MAKE': ''})
    try:
        bbargs = []
        for task in build_tasks:
            if args.recipename.endswith('-native') and 'package' in task:
                continue
            bbargs.append('%s:%s' % (args.recipename, task))
        exec_build_env_command(config.init_path, basepath, 'bitbake %s' % ' '.join(bbargs), watch=True)
    except bb.process.ExecutionError as e:
        # We've already seen the output since watch=True, so just ensure we return something to the user
        return e.exitcode
    finally:
        if args.disable_parallel_make:
            _set_file_values(bbappend, {'PARALLEL_MAKE': None})

    return 0

def register_commands(subparsers, context):
    """Register devtool subcommands from this plugin"""
    parser_build = subparsers.add_parser('build', help='Build a recipe',
                                         description='Builds the specified recipe using bitbake (up to and including %s)' % ', '.join(_get_build_tasks(context.config)),
                                         group='working', order=50)
    parser_build.add_argument('recipename', help='Recipe to build')
    parser_build.add_argument('-s', '--disable-parallel-make', action="store_true", help='Disable make parallelism')
    parser_build.add_argument('-c', '--clean', action='store_true', help='clean up recipe building results')
    parser_build.set_defaults(func=build)