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#! /usr/bin/python
 ############################################################################
 #                                                                          #
 #                              MAINLOOP                                    #
 #                                                                          #
 #           Copyright (C) 2008 - 2010 Ada Core Technologies, Inc.          #
 #                                                                          #
 # This program is free software: you can redistribute it and/or modify     #
 # it under the terms of the GNU General Public License as published by     #
 # the Free Software Foundation, either version 3 of the License, or        #
 # (at your option) any later version.                                      #
 #                                                                          #
 # 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, see <http://www.gnu.org/licenses/>     #
 #                                                                          #
 ############################################################################

"""Usage: mainloop [options] test_list_file command_pattern

Command line interface for testsuite mainloop (in the ACATS/Fixed bugs style)
"""

from gnatpython.main import Main
from gnatpython.mainloop import (
        MainLoop, add_mainloop_options, generate_collect_result)
from gnatpython.ex import Run
from gnatpython.fileutils import split_file

import os
import sys


def main():
    m = Main(add_targets_options=True)
    add_mainloop_options(m)
    m.add_option("-o", "--output-dir",
                 dest="output_dir",
                 metavar="DIR",
                 default="./",
                 help="select output dir")
    m.add_option('--format',
                 dest="diffs_format",
                 metavar="FORMAT",
                 default=os.environ.get("MAINLOOP_FORMAT", "expected+actual"),
                 help="Select diffs format. Supported values are:"
                 " expected+actual (legacy format) or"
                 " diff (using the TEST.diff output)."
                 " Note that you can set MAINLOOP_FORMAT environment variable"
                 " to change the default (expected+value).")
    m.parse_args()

    if len(m.args) != 2:
        print "Error: 2 arguments expected"
        sys.exit(m.usage)

    test_list_file = m.args[0]
    command_pattern = m.args[1]

    # Retrieve list of old crashes and diffs/failed
    # ??? this can be computed by generate_collect_result if old_output_dir is
    # set
    old_crashes_file = os.path.join(m.options.output_dir, '/old_crashes')
    old_diffs_file = os.path.join(m.options.output_dir, 'old_diffs')

    # Initialize some metrics
    # First read the list of tests to be run
    test_list = split_file(test_list_file, ' ')
    metrics = {'total': sum([len(e) for e in test_list])}

    # Retrieve list of old crashes and diffs/failed
    metrics['old_diffs'] = [k.split(':')[0] for k in
            split_file(old_diffs_file, ignore_errors=True)]
    metrics['old_crashes'] = [k.split(':')[0] for k in
            split_file(old_crashes_file, ignore_errors=True)]

    def run_test(name, job_info):
        """Run a test

        See mainloop documentation
        """
        # VxWorks tests needs WORKER_ID to be set in order to have an id for
        # vxsim that will not collide with other instances.
        os.environ['WORKER_ID'] = str(job_info[0])

        cmd = command_pattern % {'name': name}
        cmd = cmd.split(";")
        return Run(cmd, bg=True, output=None, error=None)

    collect_result = generate_collect_result(
            results_file=os.path.join(m.options.output_dir, 'results'),
            metrics=metrics, options=m.options)

    # Launch the mainloop
    MainLoop(test_list, run_test, collect_result)

if __name__ == '__main__':
    main()