xo-cmake: add --dry-run option to generated reconfigure script

cmake/xo_macros/xo_cxx.cmake

@@ -292,7 +292,7 @@ function(xo_generate_reconfigure_script)
         return()
     endif()
 
-    set(_reconfigure_script "${CMAKE_BINARY_DIR}/xo-reconfigure")
+    set(_reconfigure_script "${CMAKE_BINARY_DIR}/reconfigure")
     configure_file(${_reconfigure_template} ${_reconfigure_script} @ONLY)
     file(CHMOD ${_reconfigure_script} PERMISSIONS
         OWNER_READ OWNER_WRITE OWNER_EXECUTE

share/xo-macros/xo-reconfigure.in

@@ -1,11 +1,55 @@
 #!/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@ \
-  "$@"
+
+dry_run_flag=false
+
+# Parse arguments
+while [[ $# -gt 0 ]]; do
+    case "$1" in
+        -n|--dry-run)
+            dry_run_flag=true
+            ;;
+        --)
+            break;
+            ;;
+        *)
+            echo "error: xo-reconfigure: unexpected argument [$1]"
+            echo "usage: xo-reconfigure"
+            echo "       xo-reconfigure [-n] -- CMAKE_ARGS"
+            exit 1
+    esac
+
+    shift
+done
+
+# Build the cmake command
+CMAKE_CMD=(
+    cmake
+    -B @CMAKE_BINARY_DIR@
+    -S @CMAKE_SOURCE_DIR@
+    -DCMAKE_BUILD_TYPE=@CMAKE_BUILD_TYPE@
+    -DCMAKE_INSTALL_PREFIX=@CMAKE_INSTALL_PREFIX@
+    -DCMAKE_INSTALL_DOCDIR=@CMAKE_INSTALL_DOCDIR@
+    -DCMAKE_MODULE_PATH=@CMAKE_MODULE_PATH@
+    -DCMAKE_PREFIX_PATH=@CMAKE_PREFIX_PATH@
+    -DCMAKE_CXX_STANDARD=@CMAKE_CXX_STANDARD@
+    -DXO_CMAKE_CONFIG_EXECUTABLE=@XO_CMAKE_CONFIG_EXECUTABLE@
+    -DENABLE_TESTING=@ENABLE_TESTING@
+    -DXO_ENABLE_DOCS=@XO_ENABLE_DOCS@
+    -DXO_ENABLE_ASM=@XO_ENABLE_ASM@
+    -DXO_ENABLE_EXAMPLES=@XO_ENABLE_EXAMPLES@
+    -DXO_ENABLE_VULKAN=@XO_ENABLE_VULKAN@
+    -DXO_ENABLE_OPENGL=@XO_ENABLE_OPENGL@
+
+    "${@}"
+)
+
+if [[ ${dry_run_flag} = true ]]; then
+    # Print the command with proper quoting for copy-paste
+    printf '%q ' "${CMAKE_CMD[@]}" | sed -e 's: -D: \\\n    -D:g'
+    printf '\n'
+else
+    # Execute the command
+    "${CMAKE_CMD[@]}"
+fi