Fix a critical bug in generate_resources.cmake

Author: mrexodia

cmake/cmkr.cmake

@@ -2,15 +2,16 @@ include_guard()
 
 # Change these defaults to point to your infrastructure if desired
 set(CMKR_REPO "https://github.com/build-cpp/cmkr" CACHE STRING "cmkr git repository" FORCE)
-set(CMKR_TAG "archive_9e1fa5dc" CACHE STRING "cmkr git tag (this needs to be available forever)" FORCE)
+set(CMKR_TAG "archive_a718dfd6" CACHE STRING "cmkr git tag (this needs to be available forever)" FORCE)
 
 # Set these from the command line to customize for development/debugging purposes
 set(CMKR_EXECUTABLE "" CACHE FILEPATH "cmkr executable")
 set(CMKR_SKIP_GENERATION OFF CACHE BOOL "skip automatic cmkr generation")
 
 # Disable cmkr if generation is disabled
-if(DEFINED ENV{CI} OR CMKR_SKIP_GENERATION)
+if(DEFINED ENV{CI} OR CMKR_SKIP_GENERATION OR CMKR_BUILD_SKIP_GENERATION)
     message(STATUS "[cmkr] Skipping automatic cmkr generation")
+    unset(CMKR_BUILD_SKIP_GENERATION CACHE)
     macro(cmkr)
     endmacro()
     return()

cmake/generate_resources.cmake

@@ -7,13 +7,12 @@ function(generate_resources target)
     foreach(SOURCE ${TARGET_SOURCES})
         if(SOURCE MATCHES ".cmake$")
             get_filename_component(RESOURCE_NAME "${SOURCE}" NAME_WE)
-            set(RESOURCE_HEADER "include/resources/${RESOURCE_NAME}.h")
-            configure_file("${SOURCE}" "${CMAKE_CURRENT_BINARY_DIR}/${RESOURCE_HEADER}")
-            file(READ "${CMAKE_CURRENT_BINARY_DIR}/${RESOURCE_HEADER}" RESOURCE_CONTENTS)
-            file(GENERATE
-                OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/${RESOURCE_HEADER}"
-                CONTENT "namespace cmkr {\nnamespace resources {\nstatic const char* ${RESOURCE_NAME} = R\"RESOURCE(${RESOURCE_CONTENTS})RESOURCE\";\n}\n}"
-            )
+            set(RESOURCE_HEADER "include/resources/${RESOURCE_NAME}.hpp")
+            # Add configure-time dependency on the source file
+            configure_file("${SOURCE}" "${RESOURCE_HEADER}" COPYONLY)
+            # Generate the actual resource into the header
+            file(READ "${SOURCE}" RESOURCE_CONTENTS)
+            configure_file("${PROJECT_SOURCE_DIR}/cmake/resource.hpp.in" "${RESOURCE_HEADER}" @ONLY)
             message(STATUS "[cmkr] Generated ${RESOURCE_HEADER}")
         endif()
     endforeach()

cmake/resource.hpp.in

@@ -0,0 +1,7 @@
+namespace cmkr {
+namespace resources {
+
+static const char* @RESOURCE_NAME@ = R"RESOURCE(@RESOURCE_CONTENTS@)RESOURCE";
+
+}
+}

src/build.cpp

@@ -25,7 +25,7 @@ int run(int argc, char **argv) {
     if (gen::generate_cmake(fs::current_path().string().c_str()))
         throw std::runtime_error("CMake generation failure!");
 
-    ss << "cmake -S. -DCMKR_SKIP_GENERATION=ON -B" << project.build_dir << " ";
+    ss << "cmake -S. -DCMKR_BUILD_SKIP_GENERATION=ON -B" << project.build_dir << " ";
 
     if (!project.generator.empty()) {
         ss << "-G \"" << project.generator << "\" ";

src/cmake_generator.cpp

@@ -1,7 +1,7 @@
 #include "cmake_generator.hpp"
 #include "error.hpp"
 #include "literals.hpp"
-#include <resources/cmkr.h>
+#include <resources/cmkr.hpp>
 
 #include "fs.hpp"
 #include <cassert>