[Rework] Compile ragel sources when building rspamd

1 files changed, 109 insertions, 0 deletions

diff --git a/FindRagel.cmake b/FindRagel.cmake
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index 000000000..7b4534a80
--- /dev/null
+++ b/FindRagel.cmake
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+# - Find Ragel executable and provides macros to generate custom build rules
+# The module defines the following variables:
+#
+#  RAGEL_EXECUTABLE - path to the ragel program
+#  RAGEL_VERSION - version of ragel
+#  RAGEL_FOUND - true if the program was found
+#
+# If ragel is found, the module defines the macros:
+#
+#  RAGEL_TARGET(<Name> <RagelInp> <CodeOutput>
+#              [COMPILE_FLAGS <string>])
+#
+# which will create  a custom rule to generate a state machine. <RagelInp> is
+# the path to a Ragel file. <CodeOutput> is the name of the source file
+# generated by ragel. If  COMPILE_FLAGS option is specified, the next
+# parameter is  added in the ragel  command line.
+#
+# The macro defines a set of variables:
+#  RAGEL_${Name}_DEFINED       - true is the macro ran successfully
+#  RAGEL_${Name}_INPUT         - The input source file, an alias for <RagelInp>
+#  RAGEL_${Name}_OUTPUT_SOURCE - The source file generated by ragel
+#  RAGEL_${Name}_OUTPUT_HEADER - The header file generated by ragel
+#  RAGEL_${Name}_OUTPUTS       - The sources files generated by ragel
+#  RAGEL_${Name}_COMPILE_FLAGS - Options used in the ragel command line
+#
+#  ====================================================================
+#  Example:
+#
+#   find_package(RAGEL) # or e.g.: find_package(RAGEL 6.6 REQUIRED)
+#   RAGEL_TARGET(MyMachine machine.rl ${CMAKE_CURRENT_BINARY_DIR}/machine.cc)
+#   add_executable(Foo main.cc ${RAGEL_MyMachine_OUTPUTS})
+#  ====================================================================
+
+# 2014-02-09, Georg Sauthoff <mail@georg.so>
+#
+# I don't think that these few lines are even copyrightable material,
+# but I am fine with using the BSD/MIT/GPL license on it ...
+#
+# I've used following references:
+# http://www.cmake.org/cmake/help/v2.8.12/cmake.html
+# /usr/share/cmake/Modules/FindFLEX.cmake
+# /usr/share/cmake/Modules/FindBISON.cmake
+
+# uses some features which are not available in 2.6
+cmake_minimum_required(VERSION 2.8)
+
+find_program(RAGEL_EXECUTABLE NAMES ragel DOC "path to the ragel executable")
+mark_as_advanced(RAGEL_EXECUTABLE)
+
+if(RAGEL_EXECUTABLE)
+
+  execute_process(COMMAND ${RAGEL_EXECUTABLE} --version
+    OUTPUT_VARIABLE RAGEL_version_output
+    ERROR_VARIABLE  RAGEL_version_error
+    RESULT_VARIABLE RAGEL_version_result
+    OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+  if(${RAGEL_version_result} EQUAL 0)
+    string(REGEX REPLACE "^Ragel State Machine Compiler version ([^ ]+) .*$"
+                         "\\1"
+                         RAGEL_VERSION "${RAGEL_version_output}")
+  else()
+    message(SEND_ERROR
+            "Command \"${RAGEL_EXECUTABLE} --version\" failed with output:
+${RAGEL_version_error}")
+  endif()
+
+  #============================================================
+  # RAGEL_TARGET (public macro)
+  #============================================================
+  #
+  macro(RAGEL_TARGET Name Input Output)
+    set(RAGEL_TARGET_usage
+              "RAGEL_TARGET(<Name> <Input> <Output> [COMPILE_FLAGS <string>]")
+    if(${ARGC} GREATER 3)
+      if(${ARGC} EQUAL 5)
+        if("${ARGV3}" STREQUAL "COMPILE_FLAGS")
+          set(RAGEL_EXECUTABLE_opts  "${ARGV4}")
+          separate_arguments(RAGEL_EXECUTABLE_opts)
+        else()
+          message(SEND_ERROR ${RAGEL_TARGET_usage})
+        endif()
+      else()
+        message(SEND_ERROR ${RAGEL_TARGET_usage})
+      endif()
+    endif()
+
+    add_custom_command(OUTPUT ${Output}
+      COMMAND ${RAGEL_EXECUTABLE}
+      ARGS    ${RAGEL_EXECUTABLE_opts} -o${Output} ${Input}
+      DEPENDS ${Input}
+      COMMENT
+          "[RAGEL][${Name}] Compiling state machine with Ragel ${RAGEL_VERSION}"
+      WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
+
+    set(RAGEL_${Name}_DEFINED       TRUE)
+    set(RAGEL_${Name}_OUTPUTS       ${Output})
+    set(RAGEL_${Name}_INPUT         ${Input})
+    set(RAGEL_${Name}_COMPILE_FLAGS ${RAGEL_EXECUTABLE_opts})
+  endmacro()
+
+endif()
+
+# use this include when module file is located under /usr/share/cmake/Modules
+#include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
+# use this include when module file is located in build tree
+include(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(RAGEL REQUIRED_VARS  RAGEL_EXECUTABLE
+                                        VERSION_VAR    RAGEL_VERSION)
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