BundleUtilities: do not run install_name_tool on scripts

Use the same approach as commit 08be74bfd7 (GetPrerequisites: Fix
handling of executable scripts, 2018-12-16, v3.14.0-rc1~206^2).

Modules/BundleUtilities.cmake

@@ -894,11 +894,16 @@ function(fixup_bundle_item resolved_embedded_item exepath dirs)
   # to install_name_tool:
   #
   if(changes)
-    set(cmd ${CMAKE_INSTALL_NAME_TOOL} ${changes} "${resolved_embedded_item}")
-    execute_process(COMMAND ${cmd} RESULT_VARIABLE install_name_tool_result)
-    if(NOT install_name_tool_result EQUAL 0)
-      string(REPLACE ";" "' '" msg "'${cmd}'")
-      message(FATAL_ERROR "Command failed:\n ${msg}")
+    # Check for a script by extension (.bat,.sh,...) or if the file starts with "#!" (shebang)
+    file(READ ${resolved_embedded_item} file_contents LIMIT 5)
+    if(NOT "${resolved_embedded_item}" MATCHES "\\.(bat|c?sh|bash|ksh|cmd)$" AND
+       NOT file_contents MATCHES "^#!")
+      set(cmd ${CMAKE_INSTALL_NAME_TOOL} ${changes} "${resolved_embedded_item}")
+      execute_process(COMMAND ${cmd} RESULT_VARIABLE install_name_tool_result)
+      if(NOT install_name_tool_result EQUAL 0)
+        string(REPLACE ";" "' '" msg "'${cmd}'")
+        message(FATAL_ERROR "Command failed:\n ${msg}")
+      endif()
     endif()
   endif()
 endfunction()

Tests/RunCMake/BundleUtilities/ExecutableScripts.cmake

@@ -0,0 +1,18 @@
+include(BundleUtilities)
+
+set(BU_CHMOD_BUNDLE_ITEMS ON)
+
+function(check_script script)
+  fixup_bundle_item(${script} ${script} "" "")
+endfunction()
+
+# Should not throw any errors
+# Shell script
+set(script_sh_EMBEDDED_ITEM ${CMAKE_CURRENT_LIST_DIR}/test.app/script.sh)
+check_script(${CMAKE_CURRENT_LIST_DIR}/test.app/script.sh)
+# Batch script
+set(script_bat_EMBEDDED_ITEM ${CMAKE_CURRENT_LIST_DIR}/test.app/script.bat)
+check_script(${CMAKE_CURRENT_LIST_DIR}/test.app/script.bat)
+# Shell script without extension
+set(script_EMBEDDED_ITEM ${CMAKE_CURRENT_LIST_DIR}/test.app/script)
+check_script(${CMAKE_CURRENT_LIST_DIR}/test.app/script)

Tests/RunCMake/BundleUtilities/RunCMakeTest.cmake

@@ -9,3 +9,4 @@ run_cmake(CMP0080-WARN)
 run_cmake_command(CMP0080-COMMAND-OLD ${CMAKE_COMMAND} -DCMP0080_VALUE:STRING=OLD -P ${RunCMake_SOURCE_DIR}/CMP0080-COMMAND.cmake)
 run_cmake_command(CMP0080-COMMAND-NEW ${CMAKE_COMMAND} -DCMP0080_VALUE:STRING=NEW -P ${RunCMake_SOURCE_DIR}/CMP0080-COMMAND.cmake)
 run_cmake_command(CMP0080-COMMAND-WARN ${CMAKE_COMMAND} -P ${RunCMake_SOURCE_DIR}/CMP0080-COMMAND.cmake)
+run_cmake_command(ExecutableScripts ${CMAKE_COMMAND} -P ${RunCMake_SOURCE_DIR}/ExecutableScripts.cmake)

Tests/RunCMake/BundleUtilities/test.app/script

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+echo "Hello World"

Tests/RunCMake/BundleUtilities/test.app/script.bat

@@ -0,0 +1,3 @@
+@echo off
+
+echo "Hello world"

Tests/RunCMake/BundleUtilities/test.app/script.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+echo "Hello World"