Split out optimize-baselines command from rebaseline.py.

third_party/WebKit/Tools/Scripts/webkitpy/tool/commands/optimize_baselines.py

Index: third_party/WebKit/Tools/Scripts/webkitpy/tool/commands/optimize_baselines.py
diff --git a/third_party/WebKit/Tools/Scripts/webkitpy/tool/commands/optimize_baselines.py b/third_party/WebKit/Tools/Scripts/webkitpy/tool/commands/optimize_baselines.py
new file mode 100644
index 0000000000000000000000000000000000000000..69f817a942799a7c5a87dce45e96ebdea4f4266b
--- /dev/null
+++ b/third_party/WebKit/Tools/Scripts/webkitpy/tool/commands/optimize_baselines.py
@@ -0,0 +1,56 @@
+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import logging
+import optparse
+
+from webkitpy.common.checkout.baselineoptimizer import BaselineOptimizer
+from webkitpy.layout_tests.controllers.test_result_writer import baseline_name
+from webkitpy.tool.commands.rebaseline import AbstractRebaseliningCommand
+
+
+_log = logging.getLogger(__name__)
+
+
+class OptimizeBaselines(AbstractRebaseliningCommand):
+    name = "optimize-baselines"
+    help_text = "Reshuffles the baselines for the given tests to use as litte space on disk as possible."
+    show_in_main_help = True
+    argument_names = "TEST_NAMES"
+
+    def __init__(self):
+        super(OptimizeBaselines, self).__init__(options=[
+            self.suffixes_option,
+            optparse.make_option('--no-modify-scm', action='store_true', default=False,
+                                 help='Dump SCM commands as JSON instead of actually committing changes.'),
+        ] + self.platform_options)
+
+    def _optimize_baseline(self, optimizer, test_name):
+        files_to_delete = []
+        files_to_add = []
+        for suffix in self._baseline_suffix_list:
+            name = baseline_name(self._tool.filesystem, test_name, suffix)
+            succeeded, more_files_to_delete, more_files_to_add = optimizer.optimize(name)
+            if not succeeded:
+                _log.error("Heuristics failed to optimize %s", name)
+            files_to_delete.extend(more_files_to_delete)
+            files_to_add.extend(more_files_to_add)
+        return files_to_delete, files_to_add
+
+    def execute(self, options, args, tool):
+        self._baseline_suffix_list = options.suffixes.split(',')
+        port_names = tool.port_factory.all_port_names(options.platform)
+        if not port_names:
+            _log.error("No port names match '%s'", options.platform)
+            return
+        port = tool.port_factory.get(port_names[0])
+        optimizer = BaselineOptimizer(tool, port, port_names, skip_scm_commands=options.no_modify_scm)
+        tests = port.tests(args)
+        for test_name in tests:
+            files_to_delete, files_to_add = self._optimize_baseline(optimizer, test_name)
+            for path in files_to_delete:
+                self._delete_from_scm_later(path)
+            for path in files_to_add:
+                self._add_to_scm_later(path)
+        self._print_scm_changes()