Add script to generate CronetChromeWebView.framework

By default, the script will build CronetChromeWebView.framework and copy the
results to ./out/CronetChromeWebView/. use_goma=true is also passed to gn unless
specified otherwise with the --no-goma option.

BUG=none

Review-Url: https://codereview.chromium.org/2941683002
Cr-Commit-Position: refs/heads/master@{#481957}

ios/web_view/BUILD.gn

@@ -99,7 +99,6 @@ ios_web_view_sources = [
 ios_web_view_sources += ios_web_view_public_headers
 
 ios_web_view_deps = [
-  ":generate_license",
   ":packed_resources",
   "//base",
   "//components/flags_ui",
@@ -249,22 +248,81 @@ bundle_data("packed_resources") {
   ]
 }
 
-action("generate_license") {
-  _license_path = "$target_out_dir/LICENSE"
-
-  script = "//tools/licenses.py"
-  inputs = [
-    "//buildtools/$host_os/gn",
-  ]
-  outputs = [
-    _license_path,
-  ]
-  args = [
-    "license_file",
-    rebase_path(_license_path, root_build_dir),
-    "--gn-target",
-    "//ios/web_view",
-    "--gn-out-dir",
-    ".",
-  ]
+if (additional_toolchains == [] || current_toolchain == default_toolchain) {
+  _package_dir = "$root_out_dir/cronet_ios_web_view"
+
+  action("cronet_ios_web_view_generate_license") {
+    _license_path = "$_package_dir/LICENSE"
+
+    script = "//tools/licenses.py"
+    inputs = [
+      "//buildtools/$host_os/gn",
+    ]
+    outputs = [
+      _license_path,
+    ]
+    args = [
+      "license_file",
+      rebase_path(_license_path, root_build_dir),
+      "--gn-target",
+      "//ios/web_view",
+      "--gn-out-dir",
+      ".",
+    ]
+  }
+
+  copy("cronet_ios_web_view_package_copy") {
+    sources = [
+      "$root_out_dir/CronetChromeWebView.framework",
+      "//AUTHORS",
+      "//chrome/VERSION",
+    ]
+    outputs = [
+      "$_package_dir/{{source_file_part}}",
+    ]
+
+    deps = [
+      ":cronet_web_view_combined",
+    ]
+  }
+
+  if (enable_dsyms) {
+    action("cronet_ios_web_view_dsym_archive") {
+      script = "//chrome/tools/build/mac/archive_symbols.py"
+
+      # These are the dSYMs that will be archived. The sources list must be
+      # the target outputs that correspond to the dSYMs (since a dSYM is a
+      # directory it cannot be listed as a source file). The targets that
+      # generate both the dSYM and binary image are listed in deps.
+      _dsyms = [ "$root_out_dir/CronetChromeWebView.dSYM" ]
+
+      sources = [
+        "$root_out_dir/CronetChromeWebView.framework",
+      ]
+
+      _output = "$_package_dir/CronetChromeWebView.dSYM.tar.bz2"
+
+      outputs = [
+        _output,
+      ]
+
+      args = [ rebase_path(_output, root_out_dir) ] +
+             rebase_path(_dsyms, root_out_dir)
+
+      deps = [
+        ":cronet_web_view_combined",
+      ]
+    }
+  } else {
+    group("cronet_ios_web_view_dsym_archive") {
+    }
+  }
+
+  group("cronet_ios_web_view_package") {
+    deps = [
+      ":cronet_ios_web_view_dsym_archive",
+      ":cronet_ios_web_view_generate_license",
+      ":cronet_ios_web_view_package_copy",
+    ]
+  }
 }

ios/web_view/tools/build.py

+#!/usr/bin/python
+# Copyright 2017 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.
+
+"""
+Builds and packages CronetChromeWebView.framework.
+"""
+
+import argparse
+import os
+import shutil
+import sys
+
+def target_dir_name(build_config, target_device):
+  """Returns a default output directory name string.
+
+  Args:
+    build_config: A string describing the build configuration. Ex: 'Debug'
+    target_device: A string describing the target device. Ex: 'simulator'
+  """
+  return '%s-iphone%s' % (build_config, target_device)
+
+def build(build_config, target_device, extra_gn_options):
+  """Generates and builds CronetChromeWebView.framework.
+
+  Args:
+    build_config: A string describing the build configuration. Ex: 'Debug'
+    target_device: A string describing the target device. Ex: 'simulator'
+    extra_gn_options: A string of gn args (space separated key=value items) to
+      be appended to the gn gen command.
+
+  Returns:
+    The return code of generating ninja if it is non-zero, else the return code
+      of the ninja build command.
+  """
+  if target_device == 'os':
+    target_cpu = 'arm'
+    additional_cpu = 'arm64'
+  else:
+    target_cpu = 'x86'
+    additional_cpu = 'x64'
+
+  if build_config == 'Debug':
+    build_config_gn_args = 'is_debug=true'
+  else:
+    build_config_gn_args = ('is_debug=false enable_stripping=true '
+                            'is_official_build=true')
+
+  build_dir = os.path.join("out", target_dir_name(build_config, target_device))
+  gn_args = ('target_os="ios" enable_websockets=false '
+            'is_component_build=false use_xcode_clang=true '
+            'disable_file_support=true disable_ftp_support=true '
+            'disable_brotli_filter=true ios_enable_code_signing=false '
+            'target_cpu="%s" additional_target_cpus = ["%s"] %s %s' %
+            (target_cpu, additional_cpu, build_config_gn_args,
+             extra_gn_options))
+
+  gn_command = 'gn gen %s --args=\'%s\'' % (build_dir, gn_args)
+  print gn_command
+  gn_result = os.system(gn_command)
+  if gn_result != 0:
+    return gn_result
+
+  ninja_command = ('ninja -C %s ios/web_view:cronet_ios_web_view_package' %
+                   build_dir)
+  print ninja_command
+  return os.system(ninja_command)
+
+def copy_build_products(build_config, target_device, out_dir):
+  """Copies the resulting framework and symbols to out_dir.
+
+  Args:
+    build_config: A string describing the build configuration. Ex: 'Debug'
+    target_device: A string describing the target device. Ex: 'simulator'
+    out_dir: A string to the path which all build products will be copied.
+  """
+  target_dir = target_dir_name(build_config, target_device)
+  build_dir = os.path.join("out", target_dir)
+
+  # Copy framework.
+  framework_source = os.path.join(build_dir, 'CronetChromeWebView.framework')
+  framework_dest = os.path.join(out_dir, target_dir,
+                                'CronetChromeWebView.framework')
+  print 'Copying %s to %s' % (framework_source, framework_dest)
+  shutil.copytree(framework_source, framework_dest)
+
+  # Copy symbols.
+  symbols_source = os.path.join(build_dir, 'CronetChromeWebView.dSYM')
+  symbols_dest = os.path.join(out_dir, target_dir, 'CronetChromeWebView.dSYM')
+  print 'Copying %s to %s' % (symbols_source, symbols_dest)
+  shutil.copytree(symbols_source, symbols_dest)
+
+def package_framework(build_config, target_device, out_dir, extra_gn_options):
+  """Builds CronetChromeWebView.framework and copies the result to out_dir.
+
+  Args:
+    build_config: A string describing the build configuration. Ex: 'Debug'
+    target_device: A string describing the target device. Ex: 'simulator'
+    out_dir: A string to the path which all build products will be copied.
+    extra_gn_options: A string of gn args (space separated key=value items) to
+      be appended to the gn gen command.
+
+  Returns:
+    The return code of the build if it fails or 0 if the build was successful.
+  """
+  print '\nBuilding for %s (%s)' % (target_device, build_config)
+
+  build_result = build(build_config, target_device, extra_gn_options)
+  if build_result != 0:
+    error = 'Building %s/%s failed with code: ' % (build_config, target_device)
+    print >>sys.stderr, error, build_result
+    return build_result
+  copy_build_products(build_config, target_device, out_dir)
+  return 0
+
+def package_all_frameworks(out_dir, extra_gn_options):
+  """Builds CronetChromeWebView.framework.
+
+  Builds Release and Debug versions of CronetChromeWebView.framework for both
+    iOS devices and simulator and copies the resulting frameworks into out_dir.
+
+  Args:
+    out_dir: A string to the path which all build products will be copied.
+    extra_gn_options: A string of gn args (space separated key=value items) to
+      be appended to the gn gen command.
+
+  Returns:
+    0 if all builds are successful or 1 if any build fails.
+  """
+  print 'Building CronetChromeWebView.framework...'
+
+  # Package all builds in the output directory
+  os.makedirs(out_dir)
+
+  if package_framework('Debug', 'simulator', out_dir, extra_gn_options) != 0:
+    return 1
+  if package_framework('Debug', 'os', out_dir, extra_gn_options) != 0:
+    return 1
+  if package_framework('Release', 'simulator', out_dir, extra_gn_options) != 0:
+    return 1
+  if package_framework('Release', 'os', out_dir, extra_gn_options) != 0:
+    return 1
+
+  # Copy common files from last built package to out_dir.
+  build_dir = os.path.join("out", target_dir_name('Release', 'os'))
+  package_dir = os.path.join(build_dir, 'cronet_ios_web_view')
+  shutil.copy2(os.path.join(package_dir, 'AUTHORS'), out_dir)
+  shutil.copy2(os.path.join(package_dir, 'LICENSE'), out_dir)
+  shutil.copy2(os.path.join(package_dir, 'VERSION'), out_dir)
+
+  print '\nSuccess! CronetChromeWebView.framework is packaged into %s' % out_dir
+
+  return 0
+
+def main():
+  description = "Build and package CronetChromeWebView.framework"
+  parser = argparse.ArgumentParser(description=description)
+
+  parser.add_argument('out_dir', nargs='?', default='out/CronetChromeWebView',
+                      help='path to output directory')
+  parser.add_argument('--no_goma', action='store_true',
+                      help='Prevents adding use_goma=true to the gn args.')
+
+  options, extra_options = parser.parse_known_args()
+  print 'Options:', options
+
+  if len(extra_options):
+    print >>sys.stderr, 'Unknown options: ', extra_options
+    return 1
+
+  out_dir = options.out_dir
+  # Make sure that the output directory does not exist
+  if os.path.exists(out_dir):
+    print >>sys.stderr, 'The output directory already exists: ' + out_dir
+    return 1
+
+  gn_options = '' if options.no_goma else 'use_goma=true'
+
+  return package_all_frameworks(out_dir, gn_options)
+
+
+if __name__ == '__main__':
+  sys.exit(main())