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1# Copyright (C) 2009 Google Inc. All rights reserved.
2#
3# Redistribution and use in source and binary forms, with or without
4# modification, are permitted provided that the following conditions are
5# met:
6#
7#     * Redistributions of source code must retain the above copyright
8# notice, this list of conditions and the following disclaimer.
9#     * Redistributions in binary form must reproduce the above
10# copyright notice, this list of conditions and the following disclaimer
11# in the documentation and/or other materials provided with the
12# distribution.
13#     * Neither the name of Google Inc. nor the names of its
14# contributors may be used to endorse or promote products derived from
15# this software without specific prior written permission.
16#
17# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
29import webkitpy.steps as steps
30
31from webkitpy.executive import ScriptError
32from webkitpy.webkit_logging import log
33from webkitpy.scm import CheckoutNeedsUpdate
34from webkitpy.queueengine import QueueEngine
35
36
37class StepSequenceErrorHandler():
38    @classmethod
39    def handle_script_error(cls, tool, patch, script_error):
40        raise NotImplementedError, "subclasses must implement"
41
42
43class StepSequence(object):
44    def __init__(self, steps):
45        self._steps = steps or []
46
47    def options(self):
48        collected_options = [
49            steps.Options.parent_command,
50            steps.Options.quiet,
51        ]
52        for step in self._steps:
53            collected_options = collected_options + step.options()
54        # Remove duplicates.
55        collected_options = sorted(set(collected_options))
56        return collected_options
57
58    def _run(self, tool, options, state):
59        for step in self._steps:
60            step(tool, options).run(state)
61
62    def run_and_handle_errors(self, tool, options, state=None):
63        if not state:
64            state = {}
65        try:
66            self._run(tool, options, state)
67        except CheckoutNeedsUpdate, e:
68            log("Commit failed because the checkout is out of date.  Please update and try again.")
69            log("You can pass --no-build to skip building/testing after update if you believe the new commits did not affect the results.")
70            QueueEngine.exit_after_handled_error(e)
71        except ScriptError, e:
72            if not options.quiet:
73                log(e.message_with_output())
74            if options.parent_command:
75                command = tool.command_by_name(options.parent_command)
76                command.handle_script_error(tool, state, e)
77            QueueEngine.exit_after_handled_error(e)
78