Use string(APPEND) in Modules

Automate with:

find Modules -type f -print0 | xargs -0 perl -i -0pe \
  's/set\(([a-zA-Z0-9_\$\{\}]+)(\s+)"\$\{\1\}([^"])/string(APPEND \1\2"\3/g'

13 files changed, 28 insertions, 28 deletions

diff --git a/Modules/CMakeCompilerIdDetection.cmake b/Modules/CMakeCompilerIdDetection.cmake
index 7ca79bd7ac..f2d43b6876 100644
--- a/Modules/CMakeCompilerIdDetection.cmake
+++ b/Modules/CMakeCompilerIdDetection.cmake
@@ -95,13 +95,13 @@ function(compiler_id_detection outvar lang)
 
     if(CID_ID_DEFINE)
       foreach(Id ${ordered_compilers})
-        set(CMAKE_${lang}_COMPILER_ID_CONTENT "${CMAKE_${lang}_COMPILER_ID_CONTENT}# define ${CID_PREFIX}COMPILER_IS_${Id} 0\n")
+        string(APPEND CMAKE_${lang}_COMPILER_ID_CONTENT "# define ${CID_PREFIX}COMPILER_IS_${Id} 0\n")
       endforeach()
     endif()
 
     set(pp_if "#if")
     if (CID_VERSION_STRINGS)
-      set(CMAKE_${lang}_COMPILER_ID_CONTENT "${CMAKE_${lang}_COMPILER_ID_CONTENT}\n/* Version number components: V=Version, R=Revision, P=Patch
+      string(APPEND CMAKE_${lang}_COMPILER_ID_CONTENT "\n/* Version number components: V=Version, R=Revision, P=Patch
    Version date components:   YYYY=Year, MM=Month,   DD=Day  */\n")
     endif()
 
@@ -126,7 +126,7 @@ function(compiler_id_detection outvar lang)
         string(CONFIGURE "${_compiler_id_version_compute_${Id}}" VERSION_BLOCK @ONLY)
         string(APPEND id_content "${VERSION_BLOCK}\n")
       endif()
-      set(CMAKE_${lang}_COMPILER_ID_CONTENT "${CMAKE_${lang}_COMPILER_ID_CONTENT}\n${id_content}")
+      string(APPEND CMAKE_${lang}_COMPILER_ID_CONTENT "\n${id_content}")
       set(pp_if "#elif")
     endforeach()
 
@@ -145,7 +145,7 @@ function(compiler_id_detection outvar lang)
 # define ${CID_PREFIX}COMPILER_ID \"\"")
     endif()
 
-    set(CMAKE_${lang}_COMPILER_ID_CONTENT "${CMAKE_${lang}_COMPILER_ID_CONTENT}\n${platform_compiler_detection}\n#endif")
+    string(APPEND CMAKE_${lang}_COMPILER_ID_CONTENT "\n${platform_compiler_detection}\n#endif")
   endif()
 
   set(${outvar} ${CMAKE_${lang}_COMPILER_ID_CONTENT} PARENT_SCOPE)
diff --git a/Modules/CPackComponent.cmake b/Modules/CPackComponent.cmake
index 2adc9b92bf..3a10b9930c 100644
--- a/Modules/CPackComponent.cmake
+++ b/Modules/CPackComponent.cmake
@@ -309,11 +309,11 @@ set(CPackComponent_CMake_INCLUDED 1)
 # configuration file.
 macro(cpack_append_variable_set_command var strvar)
   if (DEFINED ${var})
-    set(${strvar} "${${strvar}}set(${var}")
+    string(APPEND ${strvar} "set(${var}")
     foreach(APPENDVAL ${${var}})
-      set(${strvar} "${${strvar}} ${APPENDVAL}")
+      string(APPEND ${strvar} " ${APPENDVAL}")
     endforeach()
-    set(${strvar} "${${strvar}})\n")
+    string(APPEND ${strvar} ")\n")
   endif ()
 endmacro()
 
@@ -325,7 +325,7 @@ macro(cpack_append_string_variable_set_command var strvar)
   if (DEFINED ${var})
     list(LENGTH ${var} CPACK_APP_VALUE_LEN)
     if(${CPACK_APP_VALUE_LEN} EQUAL 1)
-      set(${strvar} "${${strvar}}set(${var} \"${${var}}\")\n")
+      string(APPEND ${strvar} "set(${var} \"${${var}}\")\n")
     endif()
   endif ()
 endmacro()
@@ -352,7 +352,7 @@ macro(cpack_append_option_set_command var strvar)
   if (${var})
     list(LENGTH ${var} CPACK_APP_VALUE_LEN)
     if(${CPACK_APP_VALUE_LEN} EQUAL 1)
-      set(${strvar} "${${strvar}}set(${var} TRUE)\n")
+      string(APPEND ${strvar} "set(${var} TRUE)\n")
     endif()
   endif ()
 endmacro()
diff --git a/Modules/CheckTypeSize.cmake b/Modules/CheckTypeSize.cmake
index 4b3e223ece..fcf1df7406 100644
--- a/Modules/CheckTypeSize.cmake
+++ b/Modules/CheckTypeSize.cmake
@@ -247,10 +247,10 @@ macro(CHECK_TYPE_SIZE TYPE VARIABLE)
     set(${VARIABLE}_CODE)
     set(_if if)
     foreach(key ${${VARIABLE}_KEYS})
-      set(${VARIABLE}_CODE "${${VARIABLE}_CODE}#${_if} defined(${key})\n# define ${VARIABLE} ${${VARIABLE}-${key}}\n")
+      string(APPEND ${VARIABLE}_CODE "#${_if} defined(${key})\n# define ${VARIABLE} ${${VARIABLE}-${key}}\n")
       set(_if elif)
     endforeach()
-    set(${VARIABLE}_CODE "${${VARIABLE}_CODE}#else\n# error ${VARIABLE} unknown\n#endif")
+    string(APPEND ${VARIABLE}_CODE "#else\n# error ${VARIABLE} unknown\n#endif")
     set(_if)
   elseif(${VARIABLE})
     set(${VARIABLE}_CODE "#define ${VARIABLE} ${${VARIABLE}}")
diff --git a/Modules/ExternalData.cmake b/Modules/ExternalData.cmake
index 873f88d052..7331fb2b4b 100644
--- a/Modules/ExternalData.cmake
+++ b/Modules/ExternalData.cmake
@@ -1111,7 +1111,7 @@ if("${ExternalData_ACTION}" STREQUAL "fetch")
       list(GET algo_list ${ii} algo)
       _ExternalData_download_object("${name}" "${hash}" "${algo}"
         obj succeeded algoErrorMsg)
-      set(errorMsg "${errorMsg}\n${algoErrorMsg}")
+      string(APPEND errorMsg "\n${algoErrorMsg}")
       if(succeeded)
         break()
       endif()
diff --git a/Modules/ExternalProject.cmake b/Modules/ExternalProject.cmake
index b812845804..24957363e3 100644
--- a/Modules/ExternalProject.cmake
+++ b/Modules/ExternalProject.cmake
@@ -415,7 +415,7 @@ file(STRINGS "${CMAKE_CURRENT_LIST_FILE}" lines
 foreach(line IN LISTS lines)
   if("${line}" MATCHES "^\\.\\. command:: ([A-Za-z0-9_]+)")
     if(_ep_func)
-      set(_ep_keywords_${_ep_func} "${_ep_keywords_${_ep_func}})$")
+      string(APPEND _ep_keywords_${_ep_func} ")$")
     endif()
     set(_ep_func "${CMAKE_MATCH_1}")
     #message("function [${_ep_func}]")
@@ -424,13 +424,13 @@ foreach(line IN LISTS lines)
   elseif("${line}" MATCHES "^  ``([A-Z0-9_]+) .*``$")
     set(_ep_key "${CMAKE_MATCH_1}")
     #message("  keyword [${_ep_key}]")
-    set(_ep_keywords_${_ep_func}
-      "${_ep_keywords_${_ep_func}}${_ep_keyword_sep}${_ep_key}")
+    string(APPEND _ep_keywords_${_ep_func}
+      "${_ep_keyword_sep}${_ep_key}")
     set(_ep_keyword_sep "|")
   endif()
 endforeach()
 if(_ep_func)
-  set(_ep_keywords_${_ep_func} "${_ep_keywords_${_ep_func}})$")
+  string(APPEND _ep_keywords_${_ep_func} ")$")
 endif()
 
 # Save regex matching supported hash algorithm names.
diff --git a/Modules/FindCUDA.cmake b/Modules/FindCUDA.cmake
index e3234302ed..a4dca5433e 100644
--- a/Modules/FindCUDA.cmake
+++ b/Modules/FindCUDA.cmake
@@ -1825,7 +1825,7 @@ macro(cuda_compile_base cuda_target format generated_files)
   else()
     set(_counter 1)
   endif()
-  set(_cuda_target "${_cuda_target}_${_counter}")
+  string(APPEND _cuda_target "_${_counter}")
   set_property(DIRECTORY PROPERTY _cuda_internal_phony_counter ${_counter})
 
   # Separate the sources from the options
diff --git a/Modules/FindOpenGL.cmake b/Modules/FindOpenGL.cmake
index 503d9559c2..af83fb735c 100644
--- a/Modules/FindOpenGL.cmake
+++ b/Modules/FindOpenGL.cmake
@@ -178,7 +178,7 @@ if(OPENGL_FOUND)
       if(OPENGL_gl_LIBRARY MATCHES "/([^/]+)\\.framework$")
         set(_gl_fw "${OPENGL_gl_LIBRARY}/${CMAKE_MATCH_1}")
         if(EXISTS "${_gl_fw}.tbd")
-          set(_gl_fw "${_gl_fw}.tbd")
+          string(APPEND _gl_fw ".tbd")
         endif()
         set_target_properties(OpenGL::GL PROPERTIES
           IMPORTED_LOCATION "${_gl_fw}")
@@ -201,7 +201,7 @@ if(OPENGL_FOUND)
       if(OPENGL_glu_LIBRARY MATCHES "/([^/]+)\\.framework$")
         set(_glu_fw "${OPENGL_glu_LIBRARY}/${CMAKE_MATCH_1}")
         if(EXISTS "${_glu_fw}.tbd")
-          set(_glu_fw "${_glu_fw}.tbd")
+          string(APPEND _glu_fw ".tbd")
         endif()
         set_target_properties(OpenGL::GLU PROPERTIES
           IMPORTED_LOCATION "${_glu_fw}")
diff --git a/Modules/Platform/AIX-GNU.cmake b/Modules/Platform/AIX-GNU.cmake
index ca6e97cde1..7f08c4a358 100644
--- a/Modules/Platform/AIX-GNU.cmake
+++ b/Modules/Platform/AIX-GNU.cmake
@@ -19,7 +19,7 @@ string(APPEND CMAKE_EXE_LINKER_FLAGS_INIT " -Wl,-brtl")
 macro(__aix_compiler_gnu lang)
   set(CMAKE_SHARED_LIBRARY_RUNTIME_${lang}_FLAG "-Wl,-blibpath:")
   set(CMAKE_SHARED_LIBRARY_RUNTIME_${lang}_FLAG_SEP ":")
-  set(CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS "${CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS} -Wl,-G,-bnoipath")
+  string(APPEND CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS " -Wl,-G,-bnoipath")
   set(CMAKE_SHARED_LIBRARY_LINK_${lang}_FLAGS "-Wl,-bexpall")
   set(CMAKE_${lang}_USE_IMPLICIT_LINK_DIRECTORIES_IN_RUNTIME_PATH 1)
 
diff --git a/Modules/Platform/CYGWIN-GNU.cmake b/Modules/Platform/CYGWIN-GNU.cmake
index d08dc812fb..784c8c676d 100644
--- a/Modules/Platform/CYGWIN-GNU.cmake
+++ b/Modules/Platform/CYGWIN-GNU.cmake
@@ -40,7 +40,7 @@ macro(__cygwin_compiler_gnu lang)
 
   set(CMAKE_EXE_EXPORTS_${lang}_FLAG "-Wl,--export-all-symbols")
   # TODO: Is -Wl,--enable-auto-import now always default?
-  set(CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS "${CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS} -Wl,--enable-auto-import")
+  string(APPEND CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS " -Wl,--enable-auto-import")
   set(CMAKE_SHARED_MODULE_CREATE_${lang}_FLAGS "${CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS}")
 
   if(NOT CMAKE_RC_COMPILER_INIT)
diff --git a/Modules/Platform/HP-UX-GNU.cmake b/Modules/Platform/HP-UX-GNU.cmake
index 7ac804bb4e..699c4aa25c 100644
--- a/Modules/Platform/HP-UX-GNU.cmake
+++ b/Modules/Platform/HP-UX-GNU.cmake
@@ -9,7 +9,7 @@ endif()
 set(__HPUX_COMPILER_GNU 1)
 
 macro(__hpux_compiler_gnu lang)
-  set(CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS "${CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS} -Wl,-E,-b,+nodefaultrpath")
+  string(APPEND CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS " -Wl,-E,-b,+nodefaultrpath")
   set(CMAKE_SHARED_LIBRARY_LINK_${lang}_FLAGS "-Wl,-E")
   set(CMAKE_SHARED_LIBRARY_RUNTIME_${lang}_FLAG "-Wl,+b")
   set(CMAKE_SHARED_LIBRARY_RUNTIME_${lang}_FLAG_SEP ":")
diff --git a/Modules/Platform/Windows-MSVC.cmake b/Modules/Platform/Windows-MSVC.cmake
index e4aca6eb2b..cfe6e1c219 100644
--- a/Modules/Platform/Windows-MSVC.cmake
+++ b/Modules/Platform/Windows-MSVC.cmake
@@ -152,9 +152,9 @@ if(WINCE)
 
   foreach(lang C CXX)
     if(_MSVC_${lang}_ARCHITECTURE_FAMILY STREQUAL "ARM")
-      set(_PLATFORM_DEFINES_${lang} "${_PLATFORM_DEFINES_${lang}} /D${MSVC_${lang}_ARCHITECTURE_ID}")
+      string(APPEND _PLATFORM_DEFINES_${lang} " /D${MSVC_${lang}_ARCHITECTURE_ID}")
       if(MSVC_${lang}_ARCHITECTURE_ID MATCHES "^ARMV([45])I$")
-        set(_FLAGS_${lang} "${_FLAGS_${lang}} /QRarch${CMAKE_MATCH_1}T")
+        string(APPEND _FLAGS_${lang} " /QRarch${CMAKE_MATCH_1}T")
       endif()
     endif()
   endforeach()
diff --git a/Modules/UseJava.cmake b/Modules/UseJava.cmake
index 8ae372006a..11828757b3 100644
--- a/Modules/UseJava.cmake
+++ b/Modules/UseJava.cmake
@@ -417,7 +417,7 @@ endfunction ()
 
 function(__java_lcat VAR)
     foreach(_line ${ARGN})
-        set(${VAR} "${${VAR}}${_line}\n")
+        string(APPEND ${VAR} "${_line}\n")
     endforeach()
 
     set(${VAR} "${${VAR}}" PARENT_SCOPE)
diff --git a/Modules/WriteCompilerDetectionHeader.cmake b/Modules/WriteCompilerDetectionHeader.cmake
index 362099efe4..e7f991249e 100644
--- a/Modules/WriteCompilerDetectionHeader.cmake
+++ b/Modules/WriteCompilerDetectionHeader.cmake
@@ -447,7 +447,7 @@ function(write_compiler_detection_header
       endif()
 
       if(NOT _WCD_ALLOW_UNKNOWN_COMPILER_VERSIONS)
-        set(${compiler_file_content} "${${compiler_file_content}}
+        string(APPEND ${compiler_file_content} "
 #    if !(${_cmake_oldestSupported_${compiler}})
 #      error Unsupported compiler version
 #    endif\n")
@@ -462,7 +462,7 @@ function(write_compiler_detection_header
         set(MACRO_HEX)
       endif()
       string(CONFIGURE "${_compiler_id_version_compute_${compiler}}" VERSION_BLOCK @ONLY)
-      set(${compiler_file_content} "${${compiler_file_content}}${VERSION_BLOCK}\n")
+      string(APPEND ${compiler_file_content} "${VERSION_BLOCK}\n")
       set(PREFIX)
       set(MACRO_DEC)
       set(MACRO_HEX)
@@ -478,7 +478,7 @@ function(write_compiler_detection_header
           set(_define_item "\n#      define ${prefix_arg}_${feature_PP} 0\n")
           set(_define_item "\n#    if ${_cmake_feature_test_${compiler}_${feature}}\n#      define ${prefix_arg}_${feature_PP} 1\n#    else${_define_item}#    endif\n")
         endif()
-        set(${compiler_file_content} "${${compiler_file_content}}${_define_item}")
+        string(APPEND ${compiler_file_content} "${_define_item}")
       endforeach()
     endforeach()
     if(pp_if STREQUAL "elif")