Revert of [Telemetry] Remove BuildbotOutputFormatter

tools/telemetry/telemetry/results/buildbot_output_formatter.py

Index: tools/telemetry/telemetry/results/buildbot_output_formatter.py
diff --git a/tools/telemetry/telemetry/results/buildbot_output_formatter.py b/tools/telemetry/telemetry/results/buildbot_output_formatter.py
new file mode 100644
index 0000000000000000000000000000000000000000..2e39ef9f6fcc0fc47a817850d92b104ef1842b99
--- /dev/null
+++ b/tools/telemetry/telemetry/results/buildbot_output_formatter.py
@@ -0,0 +1,109 @@
+# Copyright 2014 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.
+
+from telemetry import perf_tests_helper
+from telemetry.results import output_formatter
+from telemetry import value as value_module
+from telemetry.value import summary as summary_module
+
+
+class BuildbotOutputFormatter(output_formatter.OutputFormatter):
+  def __init__(self, output_stream, trace_tag=''):
+    super(BuildbotOutputFormatter, self).__init__(output_stream)
+    self._trace_tag = trace_tag
+
+  def _PrintPerfResult(self, measurement, trace, v, units,
+                       result_type='default'):
+    output = perf_tests_helper.PrintPerfResult(
+        measurement, trace, v, units, result_type, print_to_stdout=False)
+    self.output_stream.write(output + '\n')
+    self.output_stream.flush()
+
+  def Format(self, page_test_results):
+    """Print summary data in a format expected by buildbot for perf dashboards.
+
+    If any failed pages exist, only output individual page results, and do
+    not output any average data.
+    """
+    had_failures = len(page_test_results.failures) > 0
+
+    # Print out the list of unique pages.
+    perf_tests_helper.PrintPages(
+        [page.display_name for page in page_test_results.pages_that_succeeded])
+    summary = summary_module.Summary(page_test_results.all_page_specific_values)
+    for value in summary.interleaved_computed_per_page_values_and_summaries:
+      if value.page:
+        self._PrintComputedPerPageValue(value)
+      else:
+        self._PrintComputedSummaryValue(value, had_failures)
+    self._PrintOverallResults(page_test_results)
+
+  def _PrintComputedPerPageValue(self, value):
+    # We dont print per-page-values when there is a trace tag.
+    if self._trace_tag:
+      return
+
+    # Actually print the result.
+    buildbot_value = value.GetBuildbotValue()
+    buildbot_data_type = value.GetBuildbotDataType(
+        output_context=value_module.PER_PAGE_RESULT_OUTPUT_CONTEXT)
+    if buildbot_value is None or buildbot_data_type is None:
+      return
+
+    buildbot_measurement_name, buildbot_trace_name = (
+        value.GetChartAndTraceNameForPerPageResult())
+    self._PrintPerfResult(buildbot_measurement_name,
+                          buildbot_trace_name,
+                          buildbot_value, value.units, buildbot_data_type)
+
+  def _PrintComputedSummaryValue(self, value, had_failures):
+    # If there were any page errors, we typically will print nothing.
+    #
+    # Note: this branch is structured less-densely to improve legibility.
+    if had_failures:
+      return
+
+    buildbot_value = value.GetBuildbotValue()
+    buildbot_data_type = value.GetBuildbotDataType(
+        output_context=value_module.COMPUTED_PER_PAGE_SUMMARY_OUTPUT_CONTEXT)
+    if buildbot_value is None or buildbot_data_type is None:
+      return
+
+    buildbot_measurement_name, buildbot_trace_name = (
+        value.GetChartAndTraceNameForComputedSummaryResult(
+            self._trace_tag))
+    self._PrintPerfResult(buildbot_measurement_name,
+                          buildbot_trace_name,
+                          buildbot_value, value.units, buildbot_data_type)
+
+  def _PrintOverallResults(self, page_test_results):
+    # If there were no failed pages, output the overall results (results not
+    # associated with a page).
+    had_failures = len(page_test_results.failures) > 0
+    if not had_failures:
+      for value in page_test_results.all_summary_values:
+        buildbot_value = value.GetBuildbotValue()
+        buildbot_data_type = value.GetBuildbotDataType(
+            output_context=value_module.SUMMARY_RESULT_OUTPUT_CONTEXT)
+        buildbot_measurement_name, buildbot_trace_name = (
+            value.GetChartAndTraceNameForComputedSummaryResult(
+                self._trace_tag))
+        self._PrintPerfResult(
+            buildbot_measurement_name,
+            buildbot_trace_name,
+            buildbot_value,
+            value.units,
+            buildbot_data_type)
+
+    # Print the number of failed and errored pages.
+    self._PrintPerfResult('telemetry_page_measurement_results', 'num_failed',
+                          [len(page_test_results.failures)], 'count',
+                          'unimportant')
+
+    # TODO(chrishenry): Remove this in a separate patch to reduce the risk
+    # of rolling back due to buildbot breakage.
+    # Also fix src/tools/bisect-perf-regression_test.py when this is
+    # removed.
+    self._PrintPerfResult('telemetry_page_measurement_results', 'num_errored',
+                          [0], 'count', 'unimportant')