Add Perf jobs for PathKit

We have a similar ingestion strategy to Gold.

I tried to use something off the shelf like benchmark.js
but passing the PathKit context into the benchmarks was
non-trivial. Plus, making a basic benchmarking tool
ended up being not too hard.

We should be able to re-use the docker container/aggregator
for CanvasKit too.

Bug: skia:
Change-Id: I613dfc58ea57c31cf71566a8ac55f8df9272ad25
Reviewed-on: https://skia-review.googlesource.com/c/161620
Commit-Queue: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
Reviewed-by: Stephan Altmueller <stephana@google.com>
diff --git a/infra/bots/recipes/perf_pathkit.py b/infra/bots/recipes/perf_pathkit.py
new file mode 100644
index 0000000..e0c5495
--- /dev/null
+++ b/infra/bots/recipes/perf_pathkit.py
@@ -0,0 +1,162 @@
+# Copyright 2018 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.
+
+# Recipe which runs the PathKit tests using docker
+
+DEPS = [
+  'checkout',
+  'infra',
+  'recipe_engine/file',
+  'recipe_engine/path',
+  'recipe_engine/properties',
+  'recipe_engine/python',
+  'recipe_engine/step',
+  'run',
+  'vars',
+]
+
+
+DOCKER_IMAGE = 'gcr.io/skia-public/perf-karma-chrome-tests:68.0.3440.106_v1'
+INNER_KARMA_SCRIPT = '/SRC/skia/infra/pathkit/perf_pathkit.sh'
+
+
+def RunSteps(api):
+  api.vars.setup()
+  checkout_root = api.checkout.default_checkout_root
+  out_dir = api.vars.swarming_out_dir
+  api.checkout.bot_update(checkout_root=checkout_root)
+
+  # Make sure this exists, otherwise Docker will make it with root permissions.
+  api.file.ensure_directory('mkdirs out_dir', out_dir, mode=0777)
+
+  # The karma script is configured to look in ./npm-(asmjs|wasm)/bin/ for
+  # the test files to load, so we must copy them there (see Set up for docker).
+  copy_dest = checkout_root.join('skia', 'modules', 'pathkit',
+                        'npm-wasm', 'bin')
+  if 'asmjs' in api.vars.builder_name:
+    copy_dest = checkout_root.join('skia', 'modules', 'pathkit',
+                        'npm-asmjs', 'bin')
+
+  base_dir = api.vars.build_dir
+  bundle_name = 'pathkit.wasm'
+  if 'asmjs' in api.vars.builder_name:
+    bundle_name = 'pathkit.js.mem'
+
+  api.python.inline(
+      name='Set up for docker',
+      program='''import errno
+import os
+import shutil
+import sys
+
+copy_dest = sys.argv[1]
+base_dir = sys.argv[2]
+bundle_name = sys.argv[3]
+out_dir = sys.argv[4]
+
+# Clean out old binaries (if any)
+try:
+  shutil.rmtree(copy_dest)
+except OSError as e:
+  if e.errno != errno.ENOENT:
+    raise
+
+# Make folder
+try:
+  os.makedirs(copy_dest)
+except OSError as e:
+  if e.errno != errno.EEXIST:
+    raise
+
+# Copy binaries (pathkit.js and pathkit.wasm) to where the karma tests
+# expect them ($SKIA_ROOT/modules/pathkit/npm-wasm/)
+dest = os.path.join(copy_dest, 'pathkit.js')
+shutil.copyfile(os.path.join(base_dir, 'pathkit.js'), dest)
+os.chmod(dest, 0o644) # important, otherwise non-privileged docker can't read.
+
+if bundle_name:
+  dest = os.path.join(copy_dest, bundle_name)
+  shutil.copyfile(os.path.join(base_dir, bundle_name), dest)
+  os.chmod(dest, 0o644) # important, otherwise non-privileged docker can't read.
+
+# Prepare output folder, api.file.ensure_directory doesn't touch
+# the permissions of the out directory if it already exists.
+os.chmod(out_dir, 0o777) # important, otherwise non-privileged docker can't write.
+''',
+      args=[copy_dest, base_dir, bundle_name, out_dir],
+      infra_step=True)
+
+
+
+  cmd = ['docker', 'run', '--shm-size=2gb', '--rm',
+         '-v', '%s:/SRC' % checkout_root, '-v', '%s:/OUT' % out_dir]
+
+  if 'asmjs' in api.vars.builder_name:
+    cmd.extend(['-e', 'ASM_JS=1'])  # -e sets environment variables
+
+  cmd.extend([
+         DOCKER_IMAGE,             INNER_KARMA_SCRIPT,
+         '--builder',              api.vars.builder_name,
+         '--git_hash',             api.properties['revision'],
+         '--buildbucket_build_id', api.properties.get('buildbucket_build_id',
+                                                      ''),
+         '--bot_id',               api.vars.swarming_bot_id,
+         '--task_id',              api.vars.swarming_task_id,
+         '--browser',              'Chrome',
+         '--config',               api.vars.configuration,
+         ])
+
+  if 'asmjs' in api.vars.builder_name:
+    cmd.extend(['--compiled_language', 'asmjs']) # the default is wasm
+
+  if api.vars.is_trybot:
+    cmd.extend([
+      '--issue',         api.vars.issue,
+      '--patchset',      api.vars.patchset,
+      '--patch_storage', api.vars.patch_storage,
+    ])
+
+  api.run(
+    api.step,
+    'Performance tests of PathKit with Docker',
+    cmd=cmd)
+
+
+def GenTests(api):
+  yield (
+      api.test('Perf-Debian9-EMCC-GCE-CPU-AVX2-wasm-Release-All-PathKit') +
+      api.properties(buildername=('Perf-Debian9-EMCC-GCE-CPU-AVX2'
+                                  '-wasm-Release-All-PathKit'),
+                     repository='https://skia.googlesource.com/skia.git',
+                     revision='abc123',
+                     path_config='kitchen',
+                     swarm_out_dir='[SWARM_OUT_DIR]')
+  )
+
+  yield (
+      api.test('Perf-Debian9-EMCC-GCE-CPU-AVX2-asmjs-Release-All-PathKit') +
+      api.properties(buildername=('Perf-Debian9-EMCC-GCE-CPU-AVX2'
+                                  '-asmjs-Release-All-PathKit'),
+                     repository='https://skia.googlesource.com/skia.git',
+                     revision='abc123',
+                     path_config='kitchen',
+                     swarm_out_dir='[SWARM_OUT_DIR]')
+  )
+
+  yield (
+      api.test('pathkit_trybot') +
+      api.properties(buildername=('Perf-Debian9-EMCC-GCE-CPU-AVX2'
+                                  '-wasm-Release-All-PathKit'),
+                     repository='https://skia.googlesource.com/skia.git',
+                     revision='abc123',
+                     path_config='kitchen',
+                     swarm_out_dir='[SWARM_OUT_DIR]',
+                     patch_ref='89/456789/12',
+                     patch_repo='https://skia.googlesource.com/skia.git',
+                     patch_storage='gerrit',
+                     patch_set=7,
+                     patch_issue=1234,
+                     gerrit_project='skia',
+                     gerrit_url='https://skia-review.googlesource.com/')
+  )