Add script to compare performance of two versions of pdfium.
Run from the pdfium root:
$ testing/tools/safetynet_compare.py testing
This compares the current branch with and without local changes.
$ testing/tools/safetynet_compare.py testing/corpus --branch-before x
This compares the current branch + local changes against branch x.
It runs only the corpus tests.
$ testing/tools/safetynet_compare.py testing --branch-before x
--branch-after y --build-dir=~/output_compare
This compares branch x and branch y. x and y can be revision hashes.
The callgrind.out files of cases with significant changes will be
created in ~/output_compare.
$ testing/tools/safetynet_compare.py -h
Print all options.
Change-Id: I43aaf5fe890745db611fb3bc00a656ef799fdfef
Reviewed-on: https://pdfium-review.googlesource.com/7390
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
diff --git a/testing/tools/githelper.py b/testing/tools/githelper.py
new file mode 100644
index 0000000..42cc57d
--- /dev/null
+++ b/testing/tools/githelper.py
@@ -0,0 +1,50 @@
+# Copyright 2017 The PDFium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""Classes for dealing with git."""
+
+import subprocess
+
+
+class GitHelper(object):
+ """Issues git commands. Stateful."""
+
+ def __init__(self):
+ self.stashed = 0
+
+ def Checkout(self, branch):
+ """Checks out a branch."""
+ subprocess.check_output(['git', 'checkout', branch])
+
+ def StashPush(self):
+ """Stashes uncommitted changes."""
+ output = subprocess.check_output(['git', 'stash', '--include-untracked'])
+ if 'No local changes to save' in output:
+ return False
+
+ self.stashed += 1
+ return True
+
+ def StashPopAll(self):
+ """Pops as many changes as this instance stashed."""
+ while self.stashed > 0:
+ subprocess.check_output(['git', 'stash', 'pop'])
+ self.stashed -= 1
+
+ def GetCurrentBranchName(self):
+ """Returns a string with the current branch name."""
+ return subprocess.check_output(
+ ['git', 'rev-parse', '--abbrev-ref', 'HEAD']).strip()
+
+ def BranchExists(self, branch_name):
+ """Return whether a branch with the given name exists."""
+ try:
+ subprocess.check_output(['git', 'rev-parse', '--verify',
+ branch_name])
+ return True
+ except subprocess.CalledProcessError:
+ return False
+
+ def CloneLocal(self, source_repo, new_repo):
+ subprocess.check_call(['git', 'clone', source_repo, new_repo])