Add a script to build and copy the command buffer shared library. This script will be used by the b…

tools/build_command_buffer.py

Index: tools/build_command_buffer.py
diff --git a/tools/build_command_buffer.py b/tools/build_command_buffer.py
new file mode 100755
index 0000000000000000000000000000000000000000..2f9d02ca8d2f763c9375c1f03e19046875cfa391
--- /dev/null
+++ b/tools/build_command_buffer.py
@@ -0,0 +1,134 @@
+#!/usr/bin/python
+
+# Copyright 2016 Google Inc.
+#
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+
+"""
+Script to build the command buffer shared library and copy it to Skia tree
+"""
+
+
+import argparse
+import os
+import shutil
+import subprocess
+import sys
+
+
+def main():
+  parser = argparse.ArgumentParser(description=('Builds command_buffer_gles2 '
+                                                'library and copies it'))
+  parser.add_argument('-c', '--chrome-dir', required=True, help=
+      'path to Chromium checkout (directory containing .gclient)')
+  parser.add_argument('-o', '--output-dir', required=True,
+      help='path to copy the command buffer shared library to')
+  parser.add_argument('--make-output-dir', default=False, action='store_true',
+      help='Makes the output directory if it does not already exist.')
+  parser.add_argument('-f', '--fetch', action='store_true',
+      help=('Create Chromium src directory and fetch chromium checkout (if '
+            'directory does not already exist)'))
+  parser.add_argument('--chrome-build-type', default='Release',
+      help='Type of build for the command buffer (e.g. Debug or Release)')
+  parser.add_argument('--extra-ninja-args', default='',
+      help=('Extra arguments to pass to ninja when building the command '
+            'buffer shared library'))
+  parser.add_argument('--chrome-revision', default='origin/lkgr',
+      help='Revision (hash, branch, tag) of Chromium to use.')
+  parser.add_argument('--no-sync', action='store_true', default=False,
+      help='Don\'t run git fetch or gclient sync in the Chromium tree')
+  args = parser.parse_args()
+
+  args.chrome_dir = os.path.abspath(args.chrome_dir)
+  args.output_dir = os.path.abspath(args.output_dir)
+
+  if os.path.isfile(args.chrome_dir):
+    sys.exit(args.chrome_dir + ' exists but is a file.')
+
+  if not os.path.isdir(args.output_dir):

[borenet, 2016/02/17 16:31:17]

Not sure it's really necessary to check, but this should probably be isfile,
right?

[bsalomon, 2016/02/17 16:56:48]

yep

+    sys.exit(args.output_dir + ' exists but is a file.')
+
+  chrome_src_dir = os.path.join(args.chrome_dir, 'src')
+
+  if os.path.isfile(chrome_src_dir):
+    sys.exit(chrome_src_dir + ' exists but is a file.')
+  elif not os.path.isdir(chrome_src_dir):
+    if args.fetch:
+      if os.path.isdir(args.chrome_dir):
+        # If chrome_dir is a dir but chrome_src_dir does not exist we will only
+        # fetch into chrome_dir if it is empty.
+        if os.listdir(args.chrome_dir):
+          sys.exit(args.chrome_dir + ' is not a chromium checkout and is not '
+              'empty.')
+      else:
+        os.makedirs(args.chrome_dir)
+      if not os.path.isdir(args.chrome_dir):
+        sys.exit('Could not create ' + args.chrome_dir)
+    try:
+      subprocess.check_call(['fetch', 'chromium'], cwd=args.chrome_dir)
+    except subprocess.CalledProcessError as error:
+      sys.exit('Error (ret code: ' + error.returncode + ') calling "' +
+          error.cmd + '" in ' + args.chrome_dir)

[borenet, 2016/02/17 16:31:16]

Format strings would be better here:

sys.exit('Error (ret code: %d) calling "%s" in %s' % (error.returncode,
error.cmd, args.chrome_dir))

[bsalomon, 2016/02/17 16:56:48]

Done.

+
+
+  if not os.path.isdir(chrome_src_dir):
+    sys.exit(chrome_src_dir + ' is not a directory.')
+
+  if os.path.isfile(args.output_dir):
+    sys.exit(args.output_dir + ' exists but is a file.')
+  elif not os.path.isdir(args.output_dir):
+    if args.make_output_dir:
+      os.makedirs(args.output_dir)
+
+  chrome_target_dir_rel = os.path.join('out', args.chrome_build_type)
+  chrome_target_dir = os.path.join(chrome_src_dir, chrome_target_dir_rel)
+
+  if not args.no_sync:
+    try:
+      subprocess.check_call(['git', 'fetch'], cwd=chrome_src_dir)
+    except subprocess.CalledProcessError as error:
+      sys.exit('Error (ret code: ' + error.returncode + ') calling "' +
+          error.cmd + '" in ' + chrome_src_dir)
+
+  try:
+    subprocess.check_call(['git', 'checkout', args.chrome_revision],
+        cwd=chrome_src_dir)
+  except subprocess.CalledProcessError as error:
+   sys.exit('Error (ret code: ' + error.returncode + ') calling "' + error.cmd +
+       '" in ' + chrome_src_dir)
+
+  if not args.no_sync:
+    try:
+      subprocess.check_call(['gclient', 'sync'], cwd=chrome_src_dir)
+    except subprocess.CalledProcessError as error:
+      sys.exit('Error (ret code: ' + error.returncode + ') calling "' +
+          error.cmd + '" in ' + chrome_src_dir)
+
+  try:
+    subprocess.check_call(['ninja', args.extra_ninja_args, '-C',

[borenet, 2016/02/17 16:31:17]

You might need to do (['ninja'] + shlex.split(args.extra_ninja_args) + ['-C,
...]) in case extra_ninja_args contains more than one argument.

[bsalomon, 2016/02/17 16:56:48]

Done.

+        chrome_target_dir_rel, 'command_buffer_gles2'], cwd=chrome_src_dir)
+  except subprocess.CalledProcessError as error:
+    sys.exit('Error (ret code: ' + error.returncode + ') calling "' +
+        error.cmd + '" in ' + chrome_src_dir)
+
+  shared_lib_src = os.path.join(chrome_target_dir, 'lib',
+      'libcommand_buffer_gles2.so')
+  shared_lib_dst = os.path.join(args.output_dir, 'libcommand_buffer_gles2.so')
+
+  if not os.path.isfile(shared_lib_src):
+    sys.exit('Command buffer shared library not at expected location: ' +
+        shared_lib_src)
+
+  shutil.copy2(shared_lib_src, shared_lib_dst)
+
+  if not os.path.isfile(shared_lib_dst):
+    sys.exit('Command buffer library not copied to ' + shared_lib_dst)
+
+  print('Command buffer library copied to ' + shared_lib_dst)
+
+
+if __name__ == '__main__':
+    main()

[borenet, 2016/02/17 16:31:17]

Nit: indent

[bsalomon, 2016/02/17 16:56:48]

Done.

+