use Python script to concatenate qch file

src/CMakeLists.txt

@@ -7,23 +7,8 @@ add_subdirectory(Mod)
 add_subdirectory(Ext)
 add_subdirectory(Doc)
 
-configure_file(Doc/ThirdPartyLibraries.html
-    ${CMAKE_BINARY_DIR}/doc/ThirdPartyLibraries.html COPYONLY)
-
-
-
 if(BUILD_GUI)
     add_subdirectory(Gui)
-    configure_file(Doc/freecad.qhc ${CMAKE_BINARY_DIR}/doc/freecad.qhc COPYONLY)
-    #configure_file(${CMAKE_BINARY_DIR}/src/Doc/freecad.qch ${CMAKE_BINARY_DIR}/doc/freecad.qch COPYONLY)
-	# join offline doc parts
-    if(WIN32)
-        EXECUTE_PROCESS(COMMAND powershell gc ${CMAKE_SOURCE_DIR}/src/Doc/freecad.qch.part* -Enc Byte -Read 1024 | sc ${CMAKE_BINARY_DIR}/doc/freecad.qch -Enc Byte -Force)
-	    # gc is an alias for Get-Content, sc is an alias for Set-Content, 
-		#-Read XXXX can be adjusted up for performance, if the user has insufficient RAM it might fail
-    else(WIN32)
-        EXECUTE_PROCESS(COMMAND sh -c "cat ${CMAKE_SOURCE_DIR}/src/Doc/freecad.qch.part* >> ${CMAKE_BINARY_DIR}/doc/freecad.qch" )
-    endif(WIN32)
 endif(BUILD_GUI)
 
 if(BUILD_TEMPLATE)
@@ -31,18 +16,10 @@ if(BUILD_TEMPLATE)
 endif(BUILD_TEMPLATE)
 
 
-
 if(FREECAD_MAINTAINERS_BUILD AND WIN32)
     #add_subdirectory(WindowsInstaller)
 endif(FREECAD_MAINTAINERS_BUILD AND WIN32)
 
-INSTALL(FILES
-    Doc/freecad.qhc
-    ${CMAKE_BINARY_DIR}/doc/freecad.qch
-    Doc/ThirdPartyLibraries.html
-    DESTINATION ${CMAKE_INSTALL_DOCDIR}
-)
-
 if(FREECAD_CREATE_MAC_APP)
     add_subdirectory(MacAppBundle)
 endif(FREECAD_CREATE_MAC_APP)

src/Doc/CMakeLists.txt

@@ -1,3 +1,32 @@
+
+configure_file(ThirdPartyLibraries.html
+    ${CMAKE_BINARY_DIR}/doc/ThirdPartyLibraries.html COPYONLY)
+
+
+
+if(BUILD_GUI)
+    FILE(GLOB QCH_FILES freecad.qch.part*)
+    set (DEST_FILE ${CMAKE_BINARY_DIR}/doc/freecad.qch)
+    foreach(SRC_FILE ${QCH_FILES})
+        if(${SRC_FILE} IS_NEWER_THAN ${DEST_FILE})
+            EXECUTE_PROCESS(COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_SOURCE_DIR}/src/Tools/catfiles.py
+                  --outputfile=${DEST_FILE} ${QCH_FILES}
+                  WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+                  OUTPUT_STRIP_TRAILING_WHITESPACE)
+            break()
+        endif()
+    endforeach()
+
+    configure_file(freecad.qhc ${CMAKE_BINARY_DIR}/doc/freecad.qhc COPYONLY)
+endif(BUILD_GUI)
+
+INSTALL(FILES
+    freecad.qhc
+    ${CMAKE_BINARY_DIR}/doc/freecad.qch
+    ThirdPartyLibraries.html
+    DESTINATION ${CMAKE_INSTALL_DOCDIR}
+)
+
 find_package(Doxygen)
 if(DOXYGEN_FOUND)
 

src/Tools/catfiles.py

@@ -0,0 +1,39 @@
+#! python
+# -*- coding: utf-8 -*-
+# (c) 2018 Werner Mayer LGPL
+#
+
+import os,sys,getopt
+import shutil
+
+def main():
+    outputfile=""
+    try:
+        opts, args = getopt.getopt(sys.argv[1:], "o:", ["outputfile="])
+    except getopt.GetoptError:
+        pass
+
+    for o, a in opts:
+        if o in ("-o", "--outputfile"):
+            outputfile = a
+
+    #if os.path.exists(outputfile):
+    #    do_not_create = True
+    #    ts = os.path.getmtime(outputfile)
+    #    for f in args:
+    #        if os.path.getmtime(f) > ts:
+    #            do_not_create = False
+    #            break
+    #            
+    #    if do_not_create:
+    #        print ("Up-to-date file {0}".format(outputfile))
+    #        return
+    
+    with open(outputfile,'wb') as wfd:
+        for f in args:
+            with open(f,'rb') as fd:
+                shutil.copyfileobj(fd, wfd, 1024*1024*10)
+        print ("Created file {0}".format(outputfile))
+
+if __name__ == "__main__":
+    main()