NOISSUE Revert "NOISSUE remove old BundleUtilities. 2014 called and wants its cmake scripts back."

This reverts commit 8cf23bd5aa0295c8582c74617086c233cb9552a6.

1 files changed, 786 insertions, 0 deletions

diff --git a/cmake/BundleUtilities.cmake b/cmake/BundleUtilities.cmake
new file mode 100644
index 00000000..0f6cd059
--- /dev/null
+++ b/cmake/BundleUtilities.cmake
@@ -0,0 +1,786 @@
+# - Functions to help assemble a standalone bundle application.
+# A collection of CMake utility functions useful for dealing with .app
+# bundles on the Mac and bundle-like directories on any OS.
+#
+# The following functions are provided by this module:
+#   fixup_bundle
+#   copy_and_fixup_bundle
+#   verify_app
+#   get_bundle_main_executable
+#   get_dotapp_dir
+#   get_bundle_and_executable
+#   get_bundle_all_executables
+#   get_item_key
+#   clear_bundle_keys
+#   set_bundle_key_values
+#   get_bundle_keys
+#   copy_resolved_item_into_bundle
+#   copy_resolved_framework_into_bundle
+#   fixup_bundle_item
+#   verify_bundle_prerequisites
+#   verify_bundle_symlinks
+# Requires CMake 2.6 or greater because it uses function, break and
+# PARENT_SCOPE. Also depends on GetPrerequisites.cmake.
+#
+#  FIXUP_BUNDLE(<app> <libs> <dirs>)
+# Fix up a bundle in-place and make it standalone, such that it can be
+# drag-n-drop copied to another machine and run on that machine as long as all
+# of the system libraries are compatible.
+#
+# If you pass plugins to fixup_bundle as the libs parameter, you should install
+# them or copy them into the bundle before calling fixup_bundle. The "libs"
+# parameter is a list of libraries that must be fixed up, but that cannot be
+# determined by otool output analysis. (i.e., plugins)
+#
+# Gather all the keys for all the executables and libraries in a bundle, and
+# then, for each key, copy each prerequisite into the bundle. Then fix each one
+# up according to its own list of prerequisites.
+#
+# Then clear all the keys and call verify_app on the final bundle to ensure
+# that it is truly standalone.
+#
+#  COPY_AND_FIXUP_BUNDLE(<src> <dst> <libs> <dirs>)
+# Makes a copy of the bundle <src> at location <dst> and then fixes up the
+# new copied bundle in-place at <dst>...
+#
+#  VERIFY_APP(<app>)
+# Verifies that an application <app> appears valid based on running analysis
+# tools on it. Calls "message(FATAL_ERROR" if the application is not verified.
+#
+#  GET_BUNDLE_MAIN_EXECUTABLE(<bundle> <result_var>)
+# The result will be the full path name of the bundle's main executable file
+# or an "error:" prefixed string if it could not be determined.
+#
+#  GET_DOTAPP_DIR(<exe> <dotapp_dir_var>)
+# Returns the nearest parent dir whose name ends with ".app" given the full
+# path to an executable. If there is no such parent dir, then simply return
+# the dir containing the executable.
+#
+# The returned directory may or may not exist.
+#
+#  GET_BUNDLE_AND_EXECUTABLE(<app> <bundle_var> <executable_var> <valid_var>)
+# Takes either a ".app" directory name or the name of an executable
+# nested inside a ".app" directory and returns the path to the ".app"
+# directory in <bundle_var> and the path to its main executable in
+# <executable_var>
+#
+#  GET_BUNDLE_ALL_EXECUTABLES(<bundle> <exes_var>)
+# Scans the given bundle recursively for all executable files and accumulates
+# them into a variable.
+#
+#  GET_ITEM_KEY(<item> <key_var>)
+# Given a file (item) name, generate a key that should be unique considering
+# the set of libraries that need copying or fixing up to make a bundle
+# standalone. This is essentially the file name including extension with "."
+# replaced by "_"
+#
+# This key is used as a prefix for CMake variables so that we can associate a
+# set of variables with a given item based on its key.
+#
+#  CLEAR_BUNDLE_KEYS(<keys_var>)
+# Loop over the list of keys, clearing all the variables associated with each
+# key. After the loop, clear the list of keys itself.
+#
+# Caller of get_bundle_keys should call clear_bundle_keys when done with list
+# of keys.
+#
+#  SET_BUNDLE_KEY_VALUES(<keys_var> <context> <item> <exepath> <dirs>
+#                        <copyflag>)
+# Add a key to the list (if necessary) for the given item. If added,
+# also set all the variables associated with that key.
+#
+#  GET_BUNDLE_KEYS(<app> <libs> <dirs> <keys_var>)
+# Loop over all the executable and library files within the bundle (and given
+# as extra <libs>) and accumulate a list of keys representing them. Set
+# values associated with each key such that we can loop over all of them and
+# copy prerequisite libs into the bundle and then do appropriate
+# install_name_tool fixups.
+#
+#  COPY_RESOLVED_ITEM_INTO_BUNDLE(<resolved_item> <resolved_embedded_item>)
+# Copy a resolved item into the bundle if necessary. Copy is not necessary if
+# the resolved_item is "the same as" the resolved_embedded_item.
+#
+#  COPY_RESOLVED_FRAMEWORK_INTO_BUNDLE(<resolved_item> <resolved_embedded_item>)
+# Copy a resolved framework into the bundle if necessary. Copy is not necessary
+# if the resolved_item is "the same as" the resolved_embedded_item.
+#
+# By default, BU_COPY_FULL_FRAMEWORK_CONTENTS is not set. If you want full
+# frameworks embedded in your bundles, set BU_COPY_FULL_FRAMEWORK_CONTENTS to
+# ON before calling fixup_bundle. By default,
+# COPY_RESOLVED_FRAMEWORK_INTO_BUNDLE copies the framework dylib itself plus
+# the framework Resources directory.
+#
+#  FIXUP_BUNDLE_ITEM(<resolved_embedded_item> <exepath> <dirs>)
+# Get the direct/non-system prerequisites of the resolved embedded item. For
+# each prerequisite, change the way it is referenced to the value of the
+# _EMBEDDED_ITEM keyed variable for that prerequisite. (Most likely changing to
+# an "@executable_path" style reference.)
+#
+# This function requires that the resolved_embedded_item be "inside" the bundle
+# already. In other words, if you pass plugins to fixup_bundle as the libs
+# parameter, you should install them or copy them into the bundle before
+# calling fixup_bundle. The "libs" parameter is a list of libraries that must
+# be fixed up, but that cannot be determined by otool output analysis. (i.e.,
+# plugins)
+#
+# Also, change the id of the item being fixed up to its own _EMBEDDED_ITEM
+# value.
+#
+# Accumulate changes in a local variable and make *one* call to
+# install_name_tool at the end of the function with all the changes at once.
+#
+# If the BU_CHMOD_BUNDLE_ITEMS variable is set then bundle items will be
+# marked writable before install_name_tool tries to change them.
+#
+#  VERIFY_BUNDLE_PREREQUISITES(<bundle> <result_var> <info_var>)
+# Verifies that the sum of all prerequisites of all files inside the bundle
+# are contained within the bundle or are "system" libraries, presumed to exist
+# everywhere.
+#
+#  VERIFY_BUNDLE_SYMLINKS(<bundle> <result_var> <info_var>)
+# Verifies that any symlinks found in the bundle point to other files that are
+# already also in the bundle... Anything that points to an external file causes
+# this function to fail the verification.
+
+#=============================================================================
+# Copyright 2008-2009 Kitware, Inc.
+#
+# Distributed under the OSI-approved BSD License (the "License");
+# see accompanying file Copyright.txt for details.
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+# (To distribute this file outside of CMake, substitute the full
+#  License text for the above reference.)
+
+# The functions defined in this file depend on the get_prerequisites function
+# (and possibly others) found in:
+#
+get_filename_component(BundleUtilities_cmake_dir "${CMAKE_CURRENT_LIST_FILE}" PATH)
+include("${BundleUtilities_cmake_dir}/GetPrerequisites.cmake")
+
+
+function(get_bundle_main_executable bundle result_var)
+  set(result "error: '${bundle}/Contents/Info.plist' file does not exist")
+
+  if(EXISTS "${bundle}/Contents/Info.plist")
+    set(result "error: no CFBundleExecutable in '${bundle}/Contents/Info.plist' file")
+    set(line_is_main_executable 0)
+    set(bundle_executable "")
+
+    # Read Info.plist as a list of lines:
+    #
+    set(eol_char "E")
+    file(READ "${bundle}/Contents/Info.plist" info_plist)
+    string(REGEX REPLACE ";" "\\\\;" info_plist "${info_plist}")
+    string(REGEX REPLACE "\n" "${eol_char};" info_plist "${info_plist}")
+
+    # Scan the lines for "<key>CFBundleExecutable</key>" - the line after that
+    # is the name of the main executable.
+    #
+    foreach(line ${info_plist})
+      if(line_is_main_executable)
+        string(REGEX REPLACE "^.*<string>(.*)</string>.*$" "\\1" bundle_executable "${line}")
+        break()
+      endif()
+
+      if(line MATCHES "^.*<key>CFBundleExecutable</key>.*$")
+        set(line_is_main_executable 1)
+      endif()
+    endforeach()
+
+    if(NOT "${bundle_executable}" STREQUAL "")
+      if(EXISTS "${bundle}/Contents/MacOS/${bundle_executable}")
+        set(result "${bundle}/Contents/MacOS/${bundle_executable}")
+      else()
+
+        # Ultimate goal:
+        # If not in "Contents/MacOS" then scan the bundle for matching files. If
+        # there is only one executable file that matches, then use it, otherwise
+        # it's an error...
+        #
+        #file(GLOB_RECURSE file_list "${bundle}/${bundle_executable}")
+
+        # But for now, pragmatically, it's an error. Expect the main executable
+        # for the bundle to be in Contents/MacOS, it's an error if it's not:
+        #
+        set(result "error: '${bundle}/Contents/MacOS/${bundle_executable}' does not exist")
+      endif()
+    endif()
+  else()
+    #
+    # More inclusive technique... (This one would work on Windows and Linux
+    # too, if a developer followed the typical Mac bundle naming convention...)
+    #
+    # If there is no Info.plist file, try to find an executable with the same
+    # base name as the .app directory:
+    #
+  endif()
+
+  set(${result_var} "${result}" PARENT_SCOPE)
+endfunction()
+
+
+function(get_dotapp_dir exe dotapp_dir_var)
+  set(s "${exe}")
+
+  if(s MATCHES "^.*/.*\\.app/.*$")
+    # If there is a ".app" parent directory,
+    # ascend until we hit it:
+    #   (typical of a Mac bundle executable)
+    #
+    set(done 0)
+    while(NOT ${done})
+      get_filename_component(snamewe "${s}" NAME_WE)
+      get_filename_component(sname "${s}" NAME)
+      get_filename_component(sdir "${s}" PATH)
+      set(s "${sdir}")
+      if(sname MATCHES "\\.app$")
+        set(done 1)
+        set(dotapp_dir "${sdir}/${sname}")
+      endif()
+    endwhile()
+  else()
+    # Otherwise use a directory containing the exe
+    #   (typical of a non-bundle executable on Mac, Windows or Linux)
+    #
+    is_file_executable("${s}" is_executable)
+    if(is_executable)
+      get_filename_component(sdir "${s}" PATH)
+      set(dotapp_dir "${sdir}")
+    else()
+      set(dotapp_dir "${s}")
+    endif()
+  endif()
+
+
+  set(${dotapp_dir_var} "${dotapp_dir}" PARENT_SCOPE)
+endfunction()
+
+
+function(get_bundle_and_executable app bundle_var executable_var valid_var)
+  set(valid 0)
+
+  if(EXISTS "${app}")
+    # Is it a directory ending in .app?
+    if(IS_DIRECTORY "${app}")
+      if(app MATCHES "\\.app$")
+        get_bundle_main_executable("${app}" executable)
+        if(EXISTS "${app}" AND EXISTS "${executable}")
+          set(${bundle_var} "${app}" PARENT_SCOPE)
+          set(${executable_var} "${executable}" PARENT_SCOPE)
+          set(valid 1)
+          #message(STATUS "info: handled .app directory case...")
+        else()
+          message(STATUS "warning: *NOT* handled - .app directory case...")
+        endif()
+      else()
+        message(STATUS "warning: *NOT* handled - directory but not .app case...")
+      endif()
+    else()
+      # Is it an executable file?
+      is_file_executable("${app}" is_executable)
+      if(is_executable)
+        get_dotapp_dir("${app}" dotapp_dir)
+        if(EXISTS "${dotapp_dir}")
+          set(${bundle_var} "${dotapp_dir}" PARENT_SCOPE)
+          set(${executable_var} "${app}" PARENT_SCOPE)
+          set(valid 1)
+          #message(STATUS "info: handled executable file in .app dir case...")
+        else()
+          get_filename_component(app_dir "${app}" PATH)
+          set(${bundle_var} "${app_dir}" PARENT_SCOPE)
+          set(${executable_var} "${app}" PARENT_SCOPE)
+          set(valid 1)
+          #message(STATUS "info: handled executable file in any dir case...")
+        endif()
+      else()
+        message(STATUS "warning: *NOT* handled - not .app dir, not executable file...")
+      endif()
+    endif()
+  else()
+    message(STATUS "warning: *NOT* handled - directory/file does not exist...")
+  endif()
+
+  if(NOT valid)
+    set(${bundle_var} "error: not a bundle" PARENT_SCOPE)
+    set(${executable_var} "error: not a bundle" PARENT_SCOPE)
+  endif()
+
+  set(${valid_var} ${valid} PARENT_SCOPE)
+endfunction()
+
+
+function(get_bundle_all_executables bundle exes_var)
+  set(exes "")
+
+  file(GLOB_RECURSE file_list "${bundle}/*")
+  foreach(f ${file_list})
+    is_file_executable("${f}" is_executable)
+    if(is_executable)
+      set(exes ${exes} "${f}")
+    endif()
+  endforeach()
+
+  set(${exes_var} "${exes}" PARENT_SCOPE)
+endfunction()
+
+
+function(get_item_key item key_var)
+  get_filename_component(item_name "${item}" NAME)
+  if(WIN32)
+    string(TOLOWER "${item_name}" item_name)
+  endif()
+  string(REGEX REPLACE "\\." "_" ${key_var} "${item_name}")
+  set(${key_var} ${${key_var}} PARENT_SCOPE)
+endfunction()
+
+
+function(clear_bundle_keys keys_var)
+  foreach(key ${${keys_var}})
+    set(${key}_ITEM PARENT_SCOPE)
+    set(${key}_RESOLVED_ITEM PARENT_SCOPE)
+    set(${key}_DEFAULT_EMBEDDED_PATH PARENT_SCOPE)
+    set(${key}_EMBEDDED_ITEM PARENT_SCOPE)
+    set(${key}_RESOLVED_EMBEDDED_ITEM PARENT_SCOPE)
+    set(${key}_COPYFLAG PARENT_SCOPE)
+  endforeach()
+  set(${keys_var} PARENT_SCOPE)
+endfunction()
+
+
+function(set_bundle_key_values keys_var context item exepath dirs copyflag)
+  get_filename_component(item_name "${item}" NAME)
+
+  get_item_key("${item}" key)
+
+  list(LENGTH ${keys_var} length_before)
+  gp_append_unique(${keys_var} "${key}")
+  list(LENGTH ${keys_var} length_after)
+
+  if(NOT length_before EQUAL length_after)
+    gp_resolve_item("${context}" "${item}" "${exepath}" "${dirs}" resolved_item)
+
+    gp_item_default_embedded_path("${item}" default_embedded_path)
+
+    if(item MATCHES "[^/]+\\.framework/")
+      # For frameworks, construct the name under the embedded path from the
+      # opening "${item_name}.framework/" to the closing "/${item_name}":
+      #
+      string(REGEX REPLACE "^.*(${item_name}.framework/.*/?${item_name}).*$" "${default_embedded_path}/\\1" embedded_item "${item}")
+    else()
+      # For other items, just use the same name as the original, but in the
+      # embedded path:
+      #
+      set(embedded_item "${default_embedded_path}/${item_name}")
+    endif()
+
+    # Replace @executable_path and resolve ".." references:
+    #
+    string(REPLACE "@executable_path" "${exepath}" resolved_embedded_item "${embedded_item}")
+    get_filename_component(resolved_embedded_item "${resolved_embedded_item}" ABSOLUTE)
+
+    # *But* -- if we are not copying, then force resolved_embedded_item to be
+    # the same as resolved_item. In the case of multiple executables in the
+    # original bundle, using the default_embedded_path results in looking for
+    # the resolved executable next to the main bundle executable. This is here
+    # so that exes in the other sibling directories (like "bin") get fixed up
+    # properly...
+    #
+    if(NOT copyflag)
+      set(resolved_embedded_item "${resolved_item}")
+    endif()
+
+    set(${keys_var} ${${keys_var}} PARENT_SCOPE)
+    set(${key}_ITEM "${item}" PARENT_SCOPE)
+    set(${key}_RESOLVED_ITEM "${resolved_item}" PARENT_SCOPE)
+    set(${key}_DEFAULT_EMBEDDED_PATH "${default_embedded_path}" PARENT_SCOPE)
+    set(${key}_EMBEDDED_ITEM "${embedded_item}" PARENT_SCOPE)
+    set(${key}_RESOLVED_EMBEDDED_ITEM "${resolved_embedded_item}" PARENT_SCOPE)
+    set(${key}_COPYFLAG "${copyflag}" PARENT_SCOPE)
+  else()
+    #message("warning: item key '${key}' already in the list, subsequent references assumed identical to first")
+  endif()
+endfunction()
+
+
+function(get_bundle_keys app libs dirs keys_var)
+  set(${keys_var} PARENT_SCOPE)
+
+  get_bundle_and_executable("${app}" bundle executable valid)
+  if(valid)
+    # Always use the exepath of the main bundle executable for @executable_path
+    # replacements:
+    #
+    get_filename_component(exepath "${executable}" PATH)
+
+    # But do fixups on all executables in the bundle:
+    #
+    get_bundle_all_executables("${bundle}" exes)
+
+    # For each extra lib, accumulate a key as well and then also accumulate
+    # any of its prerequisites. (Extra libs are typically dynamically loaded
+    # plugins: libraries that are prerequisites for full runtime functionality
+    # but that do not show up in otool -L output...)
+    #
+    foreach(lib ${libs})
+      set_bundle_key_values(${keys_var} "${lib}" "${lib}" "${exepath}" "${dirs}" 0)
+
+      set(prereqs "")
+      get_prerequisites("${lib}" prereqs 1 1 "${exepath}" "${dirs}")
+      foreach(pr ${prereqs})
+        set_bundle_key_values(${keys_var} "${lib}" "${pr}" "${exepath}" "${dirs}" 1)
+      endforeach()
+    endforeach()
+
+    # For each executable found in the bundle, accumulate keys as we go.
+    # The list of keys should be complete when all prerequisites of all
+    # binaries in the bundle have been analyzed.
+    #
+    foreach(exe ${exes})
+      # Add the exe itself to the keys:
+      #
+      set_bundle_key_values(${keys_var} "${exe}" "${exe}" "${exepath}" "${dirs}" 0)
+
+      # Add each prerequisite to the keys:
+      #
+      set(prereqs "")
+      get_prerequisites("${exe}" prereqs 1 1 "${exepath}" "${dirs}")
+      foreach(pr ${prereqs})
+        set_bundle_key_values(${keys_var} "${exe}" "${pr}" "${exepath}" "${dirs}" 1)
+      endforeach()
+    endforeach()
+
+    # Propagate values to caller's scope:
+    #
+    set(${keys_var} ${${keys_var}} PARENT_SCOPE)
+    foreach(key ${${keys_var}})
+      set(${key}_ITEM "${${key}_ITEM}" PARENT_SCOPE)
+      set(${key}_RESOLVED_ITEM "${${key}_RESOLVED_ITEM}" PARENT_SCOPE)
+      set(${key}_DEFAULT_EMBEDDED_PATH "${${key}_DEFAULT_EMBEDDED_PATH}" PARENT_SCOPE)
+      set(${key}_EMBEDDED_ITEM "${${key}_EMBEDDED_ITEM}" PARENT_SCOPE)
+      set(${key}_RESOLVED_EMBEDDED_ITEM "${${key}_RESOLVED_EMBEDDED_ITEM}" PARENT_SCOPE)
+      set(${key}_COPYFLAG "${${key}_COPYFLAG}" PARENT_SCOPE)
+    endforeach()
+  endif()
+endfunction()
+
+
+function(copy_resolved_item_into_bundle resolved_item resolved_embedded_item)
+  if(WIN32)
+    # ignore case on Windows
+    string(TOLOWER "${resolved_item}" resolved_item_compare)
+    string(TOLOWER "${resolved_embedded_item}" resolved_embedded_item_compare)
+  else()
+    set(resolved_item_compare "${resolved_item}")
+    set(resolved_embedded_item_compare "${resolved_embedded_item}")
+  endif()
+
+  if("${resolved_item_compare}" STREQUAL "${resolved_embedded_item_compare}")
+    message(STATUS "warning: resolved_item == resolved_embedded_item - not copying...")
+  else()
+    #message(STATUS "copying COMMAND ${CMAKE_COMMAND} -E copy ${resolved_item} ${resolved_embedded_item}")
+    execute_process(COMMAND ${CMAKE_COMMAND} -E copy "${resolved_item}" "${resolved_embedded_item}")
+    if(UNIX AND NOT APPLE)
+      file(RPATH_REMOVE FILE "${resolved_embedded_item}")
+    endif()
+  endif()
+
+endfunction()
+
+
+function(copy_resolved_framework_into_bundle resolved_item resolved_embedded_item)
+  if(WIN32)
+    # ignore case on Windows
+    string(TOLOWER "${resolved_item}" resolved_item_compare)
+    string(TOLOWER "${resolved_embedded_item}" resolved_embedded_item_compare)
+  else()
+    set(resolved_item_compare "${resolved_item}")
+    set(resolved_embedded_item_compare "${resolved_embedded_item}")
+  endif()
+
+  if("${resolved_item_compare}" STREQUAL "${resolved_embedded_item_compare}")
+    message(STATUS "warning: resolved_item == resolved_embedded_item - not copying...")
+  else()
+    if(BU_COPY_FULL_FRAMEWORK_CONTENTS)
+      # Full Framework (everything):
+      get_filename_component(resolved_dir "${resolved_item}" PATH)
+      get_filename_component(resolved_dir "${resolved_dir}/../.." ABSOLUTE)
+      get_filename_component(resolved_embedded_dir "${resolved_embedded_item}" PATH)
+      get_filename_component(resolved_embedded_dir "${resolved_embedded_dir}/../.." ABSOLUTE)
+      #message(STATUS "copying COMMAND ${CMAKE_COMMAND} -E copy_directory '${resolved_dir}' '${resolved_embedded_dir}'")
+      execute_process(COMMAND ${CMAKE_COMMAND} -E copy_directory "${resolved_dir}" "${resolved_embedded_dir}")
+    else()
+      # Framework lib itself:
+      #message(STATUS "copying COMMAND ${CMAKE_COMMAND} -E copy ${resolved_item} ${resolved_embedded_item}")
+      execute_process(COMMAND ${CMAKE_COMMAND} -E copy "${resolved_item}" "${resolved_embedded_item}")
+
+      # Plus Resources, if they exist:
+      string(REGEX REPLACE "^(.*)/[^/]+/[^/]+/[^/]+$" "\\1/Resources" resolved_resources "${resolved_item}")
+      string(REGEX REPLACE "^(.*)/[^/]+/[^/]+/[^/]+$" "\\1/Resources" resolved_embedded_resources "${resolved_embedded_item}")
+      if(EXISTS "${resolved_resources}")
+        #message(STATUS "copying COMMAND ${CMAKE_COMMAND} -E copy_directory '${resolved_resources}' '${resolved_embedded_resources}'")
+        execute_process(COMMAND ${CMAKE_COMMAND} -E copy_directory "${resolved_resources}" "${resolved_embedded_resources}")
+      endif()
+    endif()
+    if(UNIX AND NOT APPLE)
+      file(RPATH_REMOVE FILE "${resolved_embedded_item}")
+    endif()
+  endif()
+
+endfunction()
+
+
+function(fixup_bundle_item resolved_embedded_item exepath dirs)
+  # This item's key is "ikey":
+  #
+  get_item_key("${resolved_embedded_item}" ikey)
+
+  # Ensure the item is "inside the .app bundle" -- it should not be fixed up if
+  # it is not in the .app bundle... Otherwise, we'll modify files in the build
+  # tree, or in other varied locations around the file system, with our call to
+  # install_name_tool. Make sure that doesn't happen here:
+  #
+  get_dotapp_dir("${exepath}" exe_dotapp_dir)
+  string(LENGTH "${exe_dotapp_dir}/" exe_dotapp_dir_length)
+  string(LENGTH "${resolved_embedded_item}" resolved_embedded_item_length)
+  set(path_too_short 0)
+  set(is_embedded 0)
+  if(${resolved_embedded_item_length} LESS ${exe_dotapp_dir_length})
+    set(path_too_short 1)
+  endif()
+  if(NOT path_too_short)
+    string(SUBSTRING "${resolved_embedded_item}" 0 ${exe_dotapp_dir_length} item_substring)
+    if("${exe_dotapp_dir}/" STREQUAL "${item_substring}")
+      set(is_embedded 1)
+    endif()
+  endif()
+  if(NOT is_embedded)
+    message("  exe_dotapp_dir/='${exe_dotapp_dir}/'")
+    message("  item_substring='${item_substring}'")
+    message("  resolved_embedded_item='${resolved_embedded_item}'")
+    message("")
+    message("Install or copy the item into the bundle before calling fixup_bundle.")
+    message("Or maybe there's a typo or incorrect path in one of the args to fixup_bundle?")
+    message("")
+    message(FATAL_ERROR "cannot fixup an item that is not in the bundle...")
+  endif()
+
+  set(prereqs "")
+  get_prerequisites("${resolved_embedded_item}" prereqs 1 0 "${exepath}" "${dirs}")
+
+  set(changes "")
+
+  foreach(pr ${prereqs})
+    # Each referenced item's key is "rkey" in the loop:
+    #
+    get_item_key("${pr}" rkey)
+
+    if(NOT "${${rkey}_EMBEDDED_ITEM}" STREQUAL "")
+      set(changes ${changes} "-change" "${pr}" "${${rkey}_EMBEDDED_ITEM}")
+    else()
+      message("warning: unexpected reference to '${pr}'")
+    endif()
+  endforeach()
+
+  if(BU_CHMOD_BUNDLE_ITEMS)
+    execute_process(COMMAND chmod u+w "${resolved_embedded_item}")
+  endif()
+
+  # Change this item's id and all of its references in one call
+  # to install_name_tool:
+  #
+  execute_process(COMMAND install_name_tool
+    ${changes} -id "${${ikey}_EMBEDDED_ITEM}" "${resolved_embedded_item}"
+  )
+endfunction()
+
+
+function(fixup_bundle app libs dirs)
+  message(STATUS "fixup_bundle")
+  message(STATUS "  app='${app}'")
+  message(STATUS "  libs='${libs}'")
+  message(STATUS "  dirs='${dirs}'")
+
+  get_bundle_and_executable("${app}" bundle executable valid)
+  if(valid)
+    get_filename_component(exepath "${executable}" PATH)
+
+    message(STATUS "fixup_bundle: preparing...")
+    get_bundle_keys("${app}" "${libs}" "${dirs}" keys)
+
+    message(STATUS "fixup_bundle: copying...")
+    list(LENGTH keys n)
+    math(EXPR n ${n}*2)
+
+    set(i 0)
+    foreach(key ${keys})
+      math(EXPR i ${i}+1)
+      if(${${key}_COPYFLAG})
+        message(STATUS "${i}/${n}: copying '${${key}_RESOLVED_ITEM}'")
+      else()
+        message(STATUS "${i}/${n}: *NOT* copying '${${key}_RESOLVED_ITEM}'")
+      endif()
+
+      set(show_status 0)
+      if(show_status)
+        message(STATUS "key='${key}'")
+        message(STATUS "item='${${key}_ITEM}'")
+        message(STATUS "resolved_item='${${key}_RESOLVED_ITEM}'")
+        message(STATUS "default_embedded_path='${${key}_DEFAULT_EMBEDDED_PATH}'")
+        message(STATUS "embedded_item='${${key}_EMBEDDED_ITEM}'")
+        message(STATUS "resolved_embedded_item='${${key}_RESOLVED_EMBEDDED_ITEM}'")
+        message(STATUS "copyflag='${${key}_COPYFLAG}'")
+        message(STATUS "")
+      endif()
+
+      if(${${key}_COPYFLAG})
+        set(item "${${key}_ITEM}")
+        if(item MATCHES "[^/]+\\.framework/")
+          copy_resolved_framework_into_bundle("${${key}_RESOLVED_ITEM}"
+            "${${key}_RESOLVED_EMBEDDED_ITEM}")
+        else()
+          copy_resolved_item_into_bundle("${${key}_RESOLVED_ITEM}"
+            "${${key}_RESOLVED_EMBEDDED_ITEM}")
+        endif()
+      endif()
+    endforeach()
+
+    message(STATUS "fixup_bundle: fixing...")
+    foreach(key ${keys})
+      math(EXPR i ${i}+1)
+      if(APPLE)
+        message(STATUS "${i}/${n}: fixing up '${${key}_RESOLVED_EMBEDDED_ITEM}'")
+        fixup_bundle_item("${${key}_RESOLVED_EMBEDDED_ITEM}" "${exepath}" "${dirs}")
+      else()
+        message(STATUS "${i}/${n}: fix-up not required on this platform '${${key}_RESOLVED_EMBEDDED_ITEM}'")
+      endif()
+    endforeach()
+
+    message(STATUS "fixup_bundle: cleaning up...")
+    clear_bundle_keys(keys)
+
+    message(STATUS "fixup_bundle: verifying...")
+    verify_app("${app}")
+  else()
+    message(SEND_ERROR "error: fixup_bundle: not a valid bundle")
+  endif()
+
+  message(STATUS "fixup_bundle: done")
+endfunction()
+
+
+function(copy_and_fixup_bundle src dst libs dirs)
+  execute_process(COMMAND ${CMAKE_COMMAND} -E copy_directory "${src}" "${dst}")
+  fixup_bundle("${dst}" "${libs}" "${dirs}")
+endfunction()
+
+
+function(verify_bundle_prerequisites bundle result_var info_var)
+  set(result 1)
+  set(info "")
+  set(count 0)
+
+  get_bundle_main_executable("${bundle}" main_bundle_exe)
+
+  file(GLOB_RECURSE file_list "${bundle}/*")
+  foreach(f ${file_list})
+    is_file_executable("${f}" is_executable)
+    if(is_executable)
+      get_filename_component(exepath "${f}" PATH)
+      math(EXPR count "${count} + 1")
+
+      message(STATUS "executable file ${count}: ${f}")
+
+      set(prereqs "")
+      get_prerequisites("${f}" prereqs 1 1 "${exepath}" "")
+
+      # On the Mac,
+      # "embedded" and "system" prerequisites are fine... anything else means
+      # the bundle's prerequisites are not verified (i.e., the bundle is not
+      # really "standalone")
+      #
+      # On Windows (and others? Linux/Unix/...?)
+      # "local" and "system" prereqs are fine...
+      #
+      set(external_prereqs "")
+
+      foreach(p ${prereqs})
+        set(p_type "")
+        gp_file_type("${f}" "${p}" p_type)
+
+        if(APPLE)
+          if(NOT "${p_type}" STREQUAL "embedded" AND NOT "${p_type}" STREQUAL "system")
+            set(external_prereqs ${external_prereqs} "${p}")
+          endif()
+        else()
+          if(NOT "${p_type}" STREQUAL "local" AND NOT "${p_type}" STREQUAL "system")
+            set(external_prereqs ${external_prereqs} "${p}")
+          endif()
+        endif()
+      endforeach()
+
+      if(external_prereqs)
+        # Found non-system/somehow-unacceptable prerequisites:
+        set(result 0)
+        set(info ${info} "external prerequisites found:\nf='${f}'\nexternal_prereqs='${external_prereqs}'\n")
+      endif()
+    endif()
+  endforeach()
+
+  if(result)
+    set(info "Verified ${count} executable files in '${bundle}'")
+  endif()
+
+  set(${result_var} "${result}" PARENT_SCOPE)
+  set(${info_var} "${info}" PARENT_SCOPE)
+endfunction()
+
+
+function(verify_bundle_symlinks bundle result_var info_var)
+  set(result 1)
+  set(info "")
+  set(count 0)
+
+  # TODO: implement this function for real...
+  # Right now, it is just a stub that verifies unconditionally...
+
+  set(${result_var} "${result}" PARENT_SCOPE)
+  set(${info_var} "${info}" PARENT_SCOPE)
+endfunction()
+
+
+function(verify_app app)
+  set(verified 0)
+  set(info "")
+
+  get_bundle_and_executable("${app}" bundle executable valid)
+
+  message(STATUS "===========================================================================")
+  message(STATUS "Analyzing app='${app}'")
+  message(STATUS "bundle='${bundle}'")
+  message(STATUS "executable='${executable}'")
+  message(STATUS "valid='${valid}'")
+
+  # Verify that the bundle does not have any "external" prerequisites:
+  #
+  verify_bundle_prerequisites("${bundle}" verified info)
+  message(STATUS "verified='${verified}'")
+  message(STATUS "info='${info}'")
+  message(STATUS "")
+
+  if(verified)
+    # Verify that the bundle does not have any symlinks to external files:
+    #
+    verify_bundle_symlinks("${bundle}" verified info)
+    message(STATUS "verified='${verified}'")
+    message(STATUS "info='${info}'")
+    message(STATUS "")
+  endif()
+
+  if(NOT verified)
+    message(FATAL_ERROR "error: verify_app failed")
+  endif()
+endfunction()