First pass at content shell for the Mac. Doesn't work yet.

chrome/tools/build/mac/copy_framework_unversioned

-#!/bin/bash
-
-# Copyright (c) 2009 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.
-
-# Copies a framework to its new home, "unversioning" it.
-#
-# Normally, frameworks are versioned bundles.  The contents of a framework are
-# stored in a versioned directory within the bundle, and symbolic links
-# provide access to the actual code and resources.  See
-# http://developer.apple.com/mac/library/documentation/MacOSX/Conceptual/BPFrameworks/Concepts/FrameworkAnatomy.html
-#
-# The symbolic links usually found in frameworks create problems.  Symbolic
-# links are excluded from code signatures.  That means that it's possible to
-# remove or retarget a symbolic link within a framework without affecting the
-# seal.  In Chrome's case, the outer .app bundle contains a framework where
-# all application code and resources live.  In order for the signature on the
-# .app to be meaningful, it encompasses the framework.  Because framework
-# resources are accessed through the framework's symbolic links, this
-# arrangement results in a case where the resources can be altered without
-# affecting the .app signature's validity.
-#
-# Indirection through symbolic links also carries a runtime performance
-# penalty on open() operations, although open() typically completes so quickly
-# that this is not considered a major performance problem.
-#
-# To resolve these problems, the frameworks that ship within Chrome's .app
-# bundle are unversioned.  Unversioning is simple: instead of using the
-# original outer .framework directory as the framework that ships within the
-# .app, the inner versioned directory is used.  Instead of accessing bundled
-# resources through symbolic links, they are accessed directly.  In normal
-# situations, the only hard-coded use of the versioned directory is by dyld,
-# when loading the framework's code, but this is handled through a normal
-# Mach-O load command, and it is easy to adjust the load command to point to
-# the unversioned framework code rather than the versioned counterpart.
-#
-# The resulting framework bundles aren't strictly conforming, but they work
-# as well as normal versioned framework bundles.
-
-set -e
-
-if [ $# -ne 2 ] ; then
-  echo "usage: ${0} FRAMEWORK DESTINATION_DIR" >& 2
-  exit 1
-fi
-
-# FRAMEWORK should be a path to a versioned framework bundle, ending in
-# .framework.  DESTINATION_DIR is the directory that the unversioned framework
-# bundle will be copied to.
-
-FRAMEWORK="${1}"
-DESTINATION_DIR="${2}"
-
-FRAMEWORK_NAME="$(basename "${FRAMEWORK}")"
-if [ "${FRAMEWORK_NAME: -10}" != ".framework" ] ; then
-  echo "${0}: ${FRAMEWORK_NAME} does not end in .framework" >& 2
-  exit 1
-fi
-FRAMEWORK_NAME_NOEXT="${FRAMEWORK_NAME:0:$((${#FRAMEWORK_NAME} - 10))}"
-
-# Find the current version.
-VERSIONS="${FRAMEWORK}/Versions"
-CURRENT_VERSION_LINK="${VERSIONS}/Current"
-CURRENT_VERSION_ID="$(readlink "${VERSIONS}/Current")"
-CURRENT_VERSION="${VERSIONS}/${CURRENT_VERSION_ID}"
-
-# Make sure that the framework's structure makes sense as a versioned bundle.
-if [ ! -e "${CURRENT_VERSION}/${FRAMEWORK_NAME_NOEXT}" ] ; then
-  echo "${0}: ${FRAMEWORK_NAME} does not contain a dylib" >& 2
-  exit 1
-fi
-
-DESTINATION="${DESTINATION_DIR}/${FRAMEWORK_NAME}"
-
-# Copy the versioned directory within the versioned framework to its
-# destination location.
-mkdir -p "${DESTINATION_DIR}"
-rsync -acC --delete --exclude Headers --exclude PrivateHeaders \
-    --include '*.so' "${CURRENT_VERSION}/" "${DESTINATION}"
-
-# Adjust the Mach-O LC_ID_DYLIB load command in the framework.  This does not
-# change the LC_LOAD_DYLIB load commands in anything that may have already
-# linked against the framework.  Not all frameworks will actually need this
-# to be changed.  Some frameworks may already be built with the proper
-# LC_ID_DYLIB for use as an unversioned framework.  Xcode users can do this
-# by setting LD_DYLIB_INSTALL_NAME to
-# $(DYLIB_INSTALL_NAME_BASE:standardizepath)/$(WRAPPER_NAME)/$(PRODUCT_NAME)
-# If invoking ld via gcc or g++, pass the desired path to -Wl,-install_name
-# at link time.
-FRAMEWORK_DYLIB="${DESTINATION}/${FRAMEWORK_NAME_NOEXT}"
-LC_ID_DYLIB_OLD="$(otool -l "${FRAMEWORK_DYLIB}" |
-                       grep -A10 "^ *cmd LC_ID_DYLIB$" |
-                       grep -m1 "^ *name" |
-                       sed -Ee 's/^ *name (.*) \(offset [0-9]+\)$/\1/')"
-VERSION_PATH="/Versions/${CURRENT_VERSION_ID}/${FRAMEWORK_NAME_NOEXT}"
-LC_ID_DYLIB_NEW="$(echo "${LC_ID_DYLIB_OLD}" |
-                       sed -Ee "s%${VERSION_PATH}$%/${FRAMEWORK_NAME_NOEXT}%")"
-
-if [ "${LC_ID_DYLIB_NEW}" != "${LC_ID_DYLIB_OLD}" ] ; then
-  install_name_tool -id "${LC_ID_DYLIB_NEW}" "${FRAMEWORK_DYLIB}"
-fi