Add BoringSSL GYP files.

third_party/boringssl/update_gypi_and_asm.py

Index: third_party/boringssl/update_gypi_and_asm.py
diff --git a/third_party/boringssl/update_gypi_and_asm.py b/third_party/boringssl/update_gypi_and_asm.py
new file mode 100644
index 0000000000000000000000000000000000000000..9ef1d06617e8ed3687f44a7514f05af216591e00
--- /dev/null
+++ b/third_party/boringssl/update_gypi_and_asm.py
@@ -0,0 +1,259 @@
+# This utility enumerates the BoringSSL source in src/ and generates two gypi

[M-A Ruel, 2014/07/09 00:24:21]

Add chromium copyright

[agl, 2014/07/09 16:42:01]

Done.

+# files: boringssl.gypi and boringssl_tests.gypi
+
+import os
+import os.path

[M-A Ruel, 2014/07/09 00:24:21]

not necessary

[agl, 2014/07/09 16:42:01]

Done.

+import stat
+import subprocess
+
+
+def FindCMakeFiles(directory):
+  '''FindCMakeFiles recurses through directory and returns a list of the paths

[M-A Ruel, 2014/07/09 00:24:21]

""" and verb for docstring, e.g.

"""Returns list of all CMakeLists.txt files recursively in directory."""

[agl, 2014/07/09 16:42:01]

Done.

+  to all CMakeLists.txt files.'''
+  cmakefiles = []
+  dents = os.listdir(directory)
+
+  for dent in dents:

[M-A Ruel, 2014/07/09 00:24:21]

What you want is:
for root, dirs, files in os.walk(directory):
  if 'CMakeLists.txt' in files:
    cmakefiles.append(os.path.join(root, 'CMakeLists.txt'))

or something like that.

[agl, 2014/07/09 16:42:01]

Done.

+    path = os.path.join(directory, dent)
+    if dent == 'CMakeLists.txt':
+      cmakefiles.append(path)
+      continue
+
+    statinfo = os.lstat(path)
+    if not stat.S_ISDIR(statinfo.st_mode):
+      continue
+
+    cmakefiles.extend(FindCMakeFiles(path))
+
+  return cmakefiles
+
+
+def NoTests(dent, is_dir):
+  '''NoTests is a filter function that can be passed to FindCFiles in order to
+  remove test sources.'''
+  if is_dir:
+    return dent != 'test'
+  return 'test.' not in dent and not dent.startswith('example_')
+
+
+def OnlyTests(dent, is_dir):
+  '''OnlyTests is a filter function that can be passed to FindCFiles in order to
+  remove non-test sources.'''
+  if is_dir:
+    return True
+  return '_test.' in dent or dent.startswith('example_')
+
+
+def FindCFiles(directory, filter_func):
+  '''FindCFiles recurses through directory and returns a list of paths to all
+  the C source files that pass filter_func.'''
+  cfiles = []
+  dents = os.listdir(directory)
+
+  for dent in dents:

[M-A Ruel, 2014/07/09 00:24:21]

os.walk

[agl, 2014/07/09 16:42:01]

Done.

+    path = os.path.join(directory, dent)
+    if dent.endswith('.c') and filter_func(dent, False):
+      cfiles.append(path)
+      continue
+
+    statinfo = os.lstat(path)
+    if not stat.S_ISDIR(statinfo.st_mode):
+      continue
+
+    if not filter_func(dent, True):
+      continue
+
+    cfiles.extend(FindCFiles(path, filter_func))
+
+  return cfiles
+
+
+def ExtractPerlAsmFromCMakeFile(cmakefile):
+  '''ExtractPerlAsmFromCMakeFile parses the contents of the CMakeLists.txt file
+  passed as an argument and returns a list of all the perlasm() directives
+  found in the file.'''
+  perlasms = []
+  f = file(cmakefile, 'r')
+
+  for line in f.readlines():

[M-A Ruel, 2014/07/09 00:24:21]

with open(cmakefile) as f:
  for line in f:
    ...

[agl, 2014/07/09 16:42:01]

Done.

+    line = line.strip()
+    if not line.startswith('perlasm('):
+      continue
+    if not line.endswith(')'):
+      raise ValueError('Bad perlasm line in %s' % cmakefile)
+# Remove "perlasm(" from start and ")" from end

[M-A Ruel, 2014/07/09 00:24:21]

Align comment with rest of script.

[agl, 2014/07/09 16:42:01]

Done.

+    line = line[8:-1]
+    params = line.split()

[M-A Ruel, 2014/07/09 00:24:21]

params = line[8:-1].split()

[agl, 2014/07/09 16:42:00]

Done.

+    if len(params) < 2:
+      raise ValueError('Bad perlasm line in %s' % cmakefile)
+    perlasms.append({
+        'output': os.path.join(os.path.dirname(cmakefile), params[0]),

[M-A Ruel, 2014/07/09 00:24:21]

sort keys

[agl, 2014/07/09 16:42:00]

Done.

+        'input': os.path.join(os.path.dirname(cmakefile), params[1]),
+        'extra_args': params[2:],
+    })
+
+  f.close()
+  return perlasms
+
+
+def ReadPerlAsmOperations():
+  '''ReadPerlAsmOperations returns a list of all perlasm() directives found in

[M-A Ruel, 2014/07/09 00:24:21]

"""Returns ...

[agl, 2014/07/09 16:42:01]

Done.

+  CMake config files in src/.'''
+  perlasms = []
+  cmakefiles = FindCMakeFiles('src')
+
+  for cmakefile in cmakefiles:
+    perlasms.extend(ExtractPerlAsmFromCMakeFile(cmakefile))
+
+  return perlasms
+
+# kOSArchCombos maps from OS and platform to the OpenSSL assembly "style" for
+# that platform and the extension used by asm files.
+kOSArchCombos = [

[M-A Ruel, 2014/07/09 00:24:21]

ALL_CAPS const at top of file.

[agl, 2014/07/09 16:42:01]

Done.

+    ('linux', 'arm', 'elf', 'S'),
+    ('linux', 'x86', 'elf', 'S'),
+    ('linux', 'x86_64', 'elf', 'S'),
+    ('mac', 'x86', 'macosx', 'S'),
+    ('mac', 'x86_64', 'macosx', 'S'),
+    ('win', 'x86_64', 'masm', 'asm'),
+]
+
+# kNonPerlFiles enumerates assembly files that are not processed by the perlasm
+# system.
+kNonPerlFiles = {
+    ('linux', 'arm'): [
+        'src/crypto/poly1305/poly1305_arm_asm.S',
+        'src/crypto/chacha/chacha_vec_arm.S',
+    ],
+}
+
+
+def PerlAsm(output_filename, input_filename, perlasm_style, extra_args):
+  '''PerlAsm runs the a perlasm script and puts the output into
+  output_filename.'''
+  try:
+    os.makedirs(os.path.dirname(output_filename))
+  except OSError:
+    pass
+  output = subprocess.check_output(
+      ['perl', input_filename, perlasm_style] + extra_args)
+  out_file = file(output_filename, 'w+')

[M-A Ruel, 2014/07/09 00:24:21]

use with statement

[agl, 2014/07/09 16:42:00]

Done.

+  out_file.write(output)
+  out_file.close()
+
+
+def WriteAsmFiles(perlasms):
+  '''WriteAsmFiles generates asm files from perlasm directives for each
+  supported OS x platform combination.'''
+  asmfiles = {}
+
+  for osarch in kOSArchCombos:
+    (osname, arch, perlasm_style, asm_ext) = osarch
+    key = (osname, arch)
+    outDir = '%s-%s' % key
+
+    for perlasm in perlasms:
+      filename = os.path.basename(perlasm['input'])
+      output = perlasm['output']
+      if not output.startswith('src'):
+        raise ValueError('output missing src: %s' % output)
+      output = os.path.join(outDir, output[4:])
+      output = output.replace('${ASM_EXT}', asm_ext)
+
+      found = False
+      if (arch == 'x86_64' and
+          ('x86_64' in filename or 'avx2' in filename)):
+        found = True
+      elif (arch == 'x86' and
+            'x86' in filename and
+            'x86_64' not in filename):
+        found = True
+      elif (arch == 'arm' and

[M-A Ruel, 2014/07/09 00:24:21]

this seems to fit 80 cols

[agl, 2014/07/09 16:42:01]

Done.

+            'arm' in filename):
+        found = True
+
+      if found:
+        PerlAsm(output, perlasm['input'], perlasm_style, perlasm['extra_args'])
+        asmfiles[key] = asmfiles.get(key, []) + [output]
+
+  for (key, non_perl_asm_files) in kNonPerlFiles.items():

[M-A Ruel, 2014/07/09 00:24:21]

s/items/iteritems/

[agl, 2014/07/09 16:42:01]

Done.

+    asmfiles[key] = asmfiles.get(key, []) + non_perl_asm_files
+
+  return asmfiles
+
+
+def PrintVariableSection(out, name, files):
+  out.write("""    '%s': [\n""" % name)
+  files.sort()
+  for f in files:
+    out.write("""      '%s',\n""" % f)
+  out.write('''    ],\n''')
+
+crypto_c_files = FindCFiles(os.path.join('src', 'crypto'), NoTests)

[Ryan Sleevi, 2014/07/09 00:03:35]

Chromium Python style is to do all this in a main() function

[M-A Ruel, 2014/07/09 00:24:21]

Yes,

def main():
  foo ...
  bar ...
  return 0


if __name__ == '__main__':
  sys.exit(main())

[agl, 2014/07/09 16:42:00]

Done.

[agl, 2014/07/09 16:42:01]

Done.

+ssl_c_files = FindCFiles(os.path.join('src', 'ssl'), NoTests)
+
+gypi = file('boringssl.gypi', 'w+')
+
+header = '''# Copyright (c) 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.
+
+# This file is created by update_gypi_and_asm.py. Do not edit manually.
+
+'''
+
+gypi.write(header + '''{
+  'variables': {\n''')
+
+PrintVariableSection(
+    gypi, 'boringssl_lib_sources', crypto_c_files + ssl_c_files)
+
+perlasms = ReadPerlAsmOperations()
+asmfiles = WriteAsmFiles(perlasms)
+
+for ((osname, arch), asm_files) in asmfiles.items():
+  PrintVariableSection(gypi, 'boringssl_%s_%s_sources' %
+                       (osname, arch), asm_files)
+
+gypi.write('''  }
+}\n''')
+
+gypi.close()
+
+
+test_c_files = FindCFiles(os.path.join('src', 'crypto'), OnlyTests)
+
+test_gypi = file('boringssl_tests.gypi', 'w+')
+
+test_gypi.write(header + '''{
+  'targets': [\n''')
+
+test_names = []
+for test in test_c_files:
+  test_name = 'boringssl_%s' % os.path.splitext(os.path.basename(test))[0]
+  test_gypi.write('''    {
+      'target_name': '%s',
+      'type': 'executable',
+      'dependencies': [
+        'boringssl',
+      ],
+      'sources': [
+        '%s',
+      ],
+    },\n''' % (test_name, test))
+  test_names.append(test_name)
+
+test_names.sort()
+
+test_gypi.write('''  ],
+  'variables': {
+    'boringssl_test_targets': [\n''')
+
+for test in test_names:
+  test_gypi.write("""      '%s',\n""" % test)
+
+test_gypi.write('''    ],
+  }
+}\n''')
+
+test_gypi.close()