xo-cmake: refactor xo-reconfigure to use cmake template

xo-cmake/bin/xo-cmake-config.in

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
 usage() {
-    echo "$0 [-u|--usage|-h|--help|--lcov-exe|--genhtml-exe|--lcov-harness-exe|--gen-ccov-template|--cmake-module-path|--subsystem-list]" 1>&2
+    echo "$0 [-u|--usage|-h|--help|--lcov-exe|--genhtml-exe|--lcov-harness-exe|--gen-ccov-template|--reconfigure-template|--cmake-module-path|--subsystem-list]" 1>&2
 }
 
 help() {
@@ -18,8 +18,9 @@ Options:
   --lcov-exe          report path to 'lcov' executable
   --genhtml-exe       report path to 'genhtml' executable
   --lcov-harness-exe  report path to 'xo-cmake-lcov-harness' executable
-  --gen-ccov-template report path to 'gen-ccov.in' template
-  --doxygen-template  report path to 'Doxyfile.in' template
+  --gen-ccov-template    report path to 'gen-ccov.in' template
+  --reconfigure-template report path to 'xo-reconfigure.in' template
+  --doxygen-template     report path to 'Doxyfile.in' template
   --subsystem-list    report path to 'subsystem-ilst'
 
 EOF
@@ -48,6 +49,9 @@ while [[ $# > 0 ]]; do
         --gen-ccov-template)
             cmd='gen_ccov_template'
             ;;
+        --reconfigure-template)
+            cmd='reconfigure_template'
+            ;;
         --doxygen-template)
             cmd='doxygen_template'
             ;;
@@ -79,6 +83,8 @@ elif [[ $cmd == 'lcov_harness_exe' ]]; then
     echo -n @CMAKE_INSTALL_FULL_BINDIR@/xo-cmake-lcov-harness
 elif [[ $cmd == 'gen_ccov_template' ]]; then
     echo -n @CMAKE_INSTALL_FULL_DATADIR@/xo-macros/gen-ccov.in
+elif [[ $cmd == 'reconfigure_template' ]]; then
+    echo -n @CMAKE_INSTALL_FULL_DATADIR@/xo-macros/xo-reconfigure.in
 elif [[ $cmd == 'doxygen_template' ]]; then
     echo -n @CMAKE_INSTALL_FULL_DATADIR@/xo-macros/Doxyfile.in
 elif [[ $cmd == 'subsystem_list' ]]; then

xo-cmake/cmake/xo_macros/xo_cxx.cmake

@@ -272,25 +272,28 @@ macro(xo_toplevel_asm_config2)
 endmacro()
 
 function(xo_generate_reconfigure_script)
-    set(_reconfigure_script "${CMAKE_BINARY_DIR}/reconfigure.sh")
-
     # In submodule build: only generate at umbrella toplevel
     # In standalone build: always generate
     if(XO_SUBMODULE_BUILD AND NOT (CMAKE_SOURCE_DIR STREQUAL PROJECT_SOURCE_DIR))
         return()
     endif()
 
-    file(WRITE ${_reconfigure_script} "#!/bin/bash\n")
-    file(APPEND ${_reconfigure_script} "# Generated by cmake - rerun to reconfigure\n")
-    file(APPEND ${_reconfigure_script} "cmake \\\n")
-    file(APPEND ${_reconfigure_script} "  -B ${CMAKE_BINARY_DIR} \\\n")
-    file(APPEND ${_reconfigure_script} "  -S ${CMAKE_SOURCE_DIR} \\\n")
-    file(APPEND ${_reconfigure_script} "  -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE} \\\n")
-    file(APPEND ${_reconfigure_script} "  -DCMAKE_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX} \\\n")
-    file(APPEND ${_reconfigure_script} "  -DXO_ENABLE_DOCS=${XO_ENABLE_DOCS} \\\n")
-    file(APPEND ${_reconfigure_script} "  -DXO_ENABLE_EXAMPLES=${XO_ENABLE_EXAMPLES} \\\n")
-    file(APPEND ${_reconfigure_script} "  -DXO_ENABLE_ASM=${XO_ENABLE_ASM} \\\n")
-    file(APPEND ${_reconfigure_script} "  \"$@\"\n")
+    # Locate template
+    if(XO_SUBMODULE_BUILD)
+        set(_reconfigure_template "${XO_UMBRELLA_SOURCE_DIR}/xo-cmake/share/xo-macros/xo-reconfigure.in")
+    else()
+        execute_process(COMMAND ${XO_CMAKE_CONFIG_EXECUTABLE} --reconfigure-template
+            OUTPUT_VARIABLE _reconfigure_template
+            OUTPUT_STRIP_TRAILING_WHITESPACE)
+    endif()
+
+    if(NOT EXISTS "${_reconfigure_template}")
+        message(WARNING "xo_generate_reconfigure_script: template not found: ${_reconfigure_template}")
+        return()
+    endif()
+
+    set(_reconfigure_script "${CMAKE_BINARY_DIR}/xo-reconfigure")
+    configure_file(${_reconfigure_template} ${_reconfigure_script} @ONLY)
     file(CHMOD ${_reconfigure_script} PERMISSIONS
         OWNER_READ OWNER_WRITE OWNER_EXECUTE
         GROUP_READ GROUP_EXECUTE

xo-cmake/share/xo-macros/xo-reconfigure.in

@@ -0,0 +1,11 @@
+#!/bin/bash
+# Generated by cmake - rerun to reconfigure
+cmake \
+  -B @CMAKE_BINARY_DIR@ \
+  -S @CMAKE_SOURCE_DIR@ \
+  -DCMAKE_BUILD_TYPE=@CMAKE_BUILD_TYPE@ \
+  -DCMAKE_INSTALL_PREFIX=@CMAKE_INSTALL_PREFIX@ \
+  -DXO_ENABLE_DOCS=@XO_ENABLE_DOCS@ \
+  -DXO_ENABLE_EXAMPLES=@XO_ENABLE_EXAMPLES@ \
+  -DXO_ENABLE_ASM=@XO_ENABLE_ASM@ \
+  "$@"