<div dir="ltr">Hi,<div class="gmail_extra"><br><div class="gmail_quote">On Sun, Nov 23, 2014 at 4:36 AM, Milian Wolff <span dir="ltr"><<a href="mailto:mail@milianw.de" target="_blank">mail@milianw.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hey all,<br>
<br>
in my quest for better *.json support in KF5 based applications, I noticed<br>
that we currently do not rebuild properly on changes to the *.desktop or<br>
*.json files.<br>
<br>
For KDevelop, I'm thus playing around with something like this currently:<br>
<br>
~~~~~~~~~~~~~~~+<br>
function(kdevplatform_add_plugin plugin)<br>
set(options )<br>
set(oneValueArgs JSON)<br>
set(multiValueArgs SOURCES)<br>
cmake_parse_arguments(KDEV_ADD_PLUGIN "${options}" "${oneValueArgs}"<br>
"${multiValueArgs}" ${ARGN})<br>
<br>
string(REGEX REPLACE "\\.cmake$" "" json_out ${KDEV_ADD_PLUGIN_JSON})<br>
configure_file(${KDEV_ADD_PLUGIN_JSON}<br>
${CMAKE_CURRENT_BINARY_DIR}/${json_out})<br>
<br>
# ensure we recompile the corresponding object files when the json file<br>
changes<br>
set(dependent_sources )<br>
foreach(header ${KDEV_ADD_PLUGIN_SOURCES})<br>
file(STRINGS "${header}" match REGEX "K_PLUGIN_FACTORY_WITH_JSON")<br>
if(match)<br>
list(APPEND dependent_sources "${header}")<br>
endif()<br>
endforeach()<br>
if(NOT dependent_sources)<br>
# fallback to all sources - better safe than sorry...<br>
set(dependent_sources ${KDEV_ADD_PLUGIN_SOURCES})<br>
endif()<br>
set_property(SOURCE ${dependent_sources} APPEND PROPERTY OBJECT_DEPENDS<br>
${CMAKE_CURRENT_BINARY_DIR}/${json_out})<br>
<br>
add_library(${plugin} MODULE ${KDEV_ADD_PLUGIN_SOURCES})<br>
set_property(TARGET ${plugin} APPEND PROPERTY AUTOGEN_TARGET_DEPENDS<br>
${CMAKE_CURRENT_BINARY_DIR}/${json_out})<br>
endfunction()<br>
~~~~~~~~~~~~~~~+<br>
<br>
<br>
To be used like this:<br>
<br>
kdevplatform_add_plugin(kdevgit JSON kdevgit.json.cmake SOURCES<br>
${kdevgit_PART_SRCS})<br>
<br>
This does trigger a rebuild, but the strings are still not updated properly.<br>
I'm quite confused actually, does anyone know where the code comes from that<br>
is embedded into the *.o that uses Q_PLUGIN_METADATA? I suspect CMake AUTOGEN?<br>
But where does that put its generated binary JSON representation? How can I<br>
make sure that it gets updated properly when the source file changes?<br>
<br>
To reproduce this, you can just change any *.desktop file that is piped<br>
through desktop_to_json. The change will be picked up by CMake and a<br>
reconfigure is triggered, which is pretty slow as well. But nothing is<br>
rebuilt. With the macro above, I trigger the build but still, the *.o file<br>
that uses K_PLUGIN_FACTORY_WITH_JSON is still containing the "old" strings...<br>
I'm at loss - can someone help me please?<span class="HOEnZb"><font color="#888888"><a href="http://milianw.de" target="_blank"></a></font></span></blockquote><div><br></div><div>Is there a particular reason why you run the to-json part during cmake time? If you setup a simple cmake script you could easily switch the generation to be a custom target and then have the plugin depend on that custom target (or rather its json output file).</div><div><br></div><div>I also think you're misunderstanding the AUTOGEN_TARGET_DEPENDS property, according to the documentation it is to be set on an auto-generator target and not on a 'standard' one like the library. As far as I can see you know the input and output files of the desktop-to-json conversion so a custom target should be easily doable (unlike automoc).</div><div><br></div><div>Andreas</div></div><br></div></div>