Add: introduce CMake for project management

CMake works on all our supported platforms, like MSVC, Mingw, GCC,
Clang, and many more. It allows for a single way of doing things,
so no longer we need shell scripts and vbs scripts to work on all
our supported platforms.

Additionally, CMake allows to generate project files for like MSVC,
KDevelop, etc.

This heavily reduces the lines of code we need to support multiple
platforms from a project perspective.

Addtiionally, this heavily improves our detection of libraries, etc.

1 files changed, 86 insertions, 0 deletions

diff --git a/cmake/CreateRegression.cmake b/cmake/CreateRegression.cmake
new file mode 100644
index 000000000..443332368
--- /dev/null
+++ b/cmake/CreateRegression.cmake
@@ -0,0 +1,86 @@
+# Macro which contains all bits and pieces to create the regression tests.
+# This creates both a standalone target 'regression', and it integrates with
+# 'ctest'. The first is prefered, as it is more verbose, and takes care of
+# dependencies correctly.
+#
+# create_regression()
+#
+macro(create_regression)
+    # Find all the files in the regression folder; they need to be copied to the
+    # build folder before we can run the regression
+    file(GLOB_RECURSE REGRESSION_SOURCE_FILES ${CMAKE_SOURCE_DIR}/regression/*)
+    foreach(REGRESSION_SOURCE_FILE IN LISTS REGRESSION_SOURCE_FILES)
+        string(REGEX REPLACE "^${CMAKE_SOURCE_DIR}/regression/" "${CMAKE_BINARY_DIR}/ai/" REGRESSION_BINARY_FILE "${REGRESSION_SOURCE_FILE}")
+        string(REGEX REPLACE "^${CMAKE_SOURCE_DIR}/regression/" "" REGRESSION_SOURCE_FILE_NAME "${REGRESSION_SOURCE_FILE}")
+
+        if ("${REGRESSION_SOURCE_FILE_NAME}" STREQUAL "regression.cfg")
+            continue()
+        endif ("${REGRESSION_SOURCE_FILE_NAME}" STREQUAL "regression.cfg")
+
+        add_custom_command(OUTPUT ${REGRESSION_BINARY_FILE}
+                COMMAND ${CMAKE_COMMAND} -E copy
+                        ${REGRESSION_SOURCE_FILE}
+                        ${REGRESSION_BINARY_FILE}
+                MAIN_DEPENDENCY ${REGRESSION_SOURCE_FILE}
+                COMMENT "Copying ${REGRESSION_SOURCE_FILE_NAME} regression file"
+        )
+
+        list(APPEND REGRESSION_BINARY_FILES ${REGRESSION_BINARY_FILE})
+    endforeach(REGRESSION_SOURCE_FILE)
+
+    # Copy the regression configuration in a special folder, so all autogenerated
+    # folders end up in the same place after running regression.
+    add_custom_command(OUTPUT ${CMAKE_BINARY_DIR}/regression/regression.cfg
+            COMMAND ${CMAKE_COMMAND} -E copy
+                    ${CMAKE_SOURCE_DIR}/regression/regression.cfg
+                    ${CMAKE_BINARY_DIR}/regression/regression.cfg
+            MAIN_DEPENDENCY ${CMAKE_SOURCE_DIR}/regression/regression.cfg
+            COMMENT "Copying ${REGRESSION_SOURCE_FILE_NAME} regression file"
+    )
+    list(APPEND REGRESSION_BINARY_FILES ${CMAKE_BINARY_DIR}/regression/regression.cfg)
+
+    # Create a new target which copies all regression files
+    add_custom_target(regression_files
+            ALL  # this is needed because 'make test' doesn't resolve dependencies, and otherwise this is never executed
+            DEPENDS
+            ${REGRESSION_BINARY_FILES}
+    )
+
+    enable_testing()
+
+    # Find all the tests we have, and create a target for them
+    file(GLOB REGRESSION_TESTS ${CMAKE_SOURCE_DIR}/regression/*)
+    foreach(REGRESSION_TEST IN LISTS REGRESSION_TESTS)
+        get_filename_component(REGRESSION_TEST_NAME "${REGRESSION_TEST}" NAME)
+
+        if ("${REGRESSION_TEST_NAME}" STREQUAL "regression.cfg")
+            continue()
+        endif ("${REGRESSION_TEST_NAME}" STREQUAL "regression.cfg")
+
+        add_custom_target(regression_${REGRESSION_TEST_NAME}
+                COMMAND ${CMAKE_COMMAND}
+                        -DOPENTTD_EXECUTABLE=$<TARGET_FILE:openttd>
+                        -DEDITBIN_EXECUTABLE=${EDITBIN_EXECUTABLE}
+                        -DREGRESSION_TEST=${REGRESSION_TEST_NAME}
+                        -P "${CMAKE_SOURCE_DIR}/cmake/scripts/Regression.cmake"
+                DEPENDS openttd regression_files
+                WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
+                COMMENT "Running regression test ${REGRESSION_TEST_NAME}"
+                )
+
+        # Also make sure that 'make test' runs the regression
+        add_test(NAME regression_${REGRESSION_TEST_NAME}
+                COMMAND ${CMAKE_COMMAND}
+                        -DOPENTTD_EXECUTABLE=$<TARGET_FILE:openttd>
+                        -DEDITBIN_EXECUTABLE=${EDITBIN_EXECUTABLE}
+                        -DREGRESSION_TEST=${REGRESSION_TEST_NAME}
+                        -P "${CMAKE_SOURCE_DIR}/cmake/scripts/Regression.cmake"
+                WORKING_DIRECTORY ${CMAKE_BINARY_DIR})
+
+        list(APPEND REGRESSION_TARGETS regression_${REGRESSION_TEST_NAME})
+    endforeach(REGRESSION_TEST)
+
+    # Create a new target which runs the regression
+    add_custom_target(regression
+            DEPENDS ${REGRESSION_TARGETS})
+endmacro()