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GitHub Repository: Ardupilot/ardupilot
 Path: blob/master/Tools/ardupilotwaf/ap_persistent.py
Views: 1798
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# Copyright (C) 2016  Intel Corporation. All rights reserved.

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#

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# This file is free software: you can redistribute it and/or modify it

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# under the terms of the GNU General Public License as published by the

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# Free Software Foundation, either version 3 of the License, or

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# (at your option) any later version.

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#

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# This file is distributed in the hope that it will be useful, but

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

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# See the GNU General Public License for more details.

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#

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# You should have received a copy of the GNU General Public License along

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# with this program.  If not, see <http://www.gnu.org/licenses/>.

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"""

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Module that changes Waf to keep persistent information across clean operations

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in for performance improvement.

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"""

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from waflib import Build, Task

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Build.SAVED_ATTRS.append('ap_persistent_task_sigs')

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Build.SAVED_ATTRS.append('ap_persistent_imp_sigs')

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Build.SAVED_ATTRS.append('ap_persistent_node_deps')

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_original_signature = Task.Task.signature

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_original_sig_implicit_deps = Task.Task.sig_implicit_deps

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if hasattr(_original_sig_implicit_deps, '__func__'):

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    _original_sig_implicit_deps = _original_sig_implicit_deps.__func__

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def _signature(self):

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    s = _original_signature(self)

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    real_fn = self.sig_implicit_deps.__func__

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    if not self.scan or _original_sig_implicit_deps != real_fn:

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        return s

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    bld = self.generator.bld

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    bld.ap_persistent_imp_sigs[self.uid()] = bld.imp_sigs[self.uid()]

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    bld.ap_persistent_node_deps[self.uid()] = bld.node_deps[self.uid()]

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    return s

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Task.Task.signature = _signature

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class CleanContext(Build.CleanContext):

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    def clean(self):

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        if not self.options.clean_all_sigs:

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            saved_task_sigs = dict(self.ap_persistent_task_sigs)

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            saved_imp_sigs = dict(self.ap_persistent_imp_sigs)

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            saved_node_deps = dict(self.ap_persistent_node_deps)

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        super(CleanContext, self).clean()

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        if not self.options.clean_all_sigs:

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            self.task_sigs.update(saved_task_sigs)

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            self.ap_persistent_task_sigs.update(saved_task_sigs)

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            self.imp_sigs.update(saved_imp_sigs)

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            self.ap_persistent_imp_sigs.update(saved_imp_sigs)

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            self.node_deps.update(saved_node_deps)

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            self.ap_persistent_node_deps.update(saved_node_deps)

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