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CMake

#[==[
@ingroup module-impl
@brief Output a boolean to JSON
Appends a condition as a JSON boolean with the given dictionary key name to the
given string variable.
~~~
_vtk_json_bool(<output> <name> <cond>)
~~~
#]==]
macro (_vtk_json_bool output name cond)
if (${cond})
set(val "true")
else ()
set(val "false")
endif ()
string(APPEND "${output}" "\"${name}\": ${val}, ")
unset(val)
endmacro ()
#[==[
@ingroup module-impl
@brief Output a string list to JSON
Appends a variable as a JSON list of strings with the given dictionary key name
to the given string variable.
~~~
_vtk_json_string_list(<output> <name> <cond>)
~~~
#]==]
macro (_vtk_json_string_list output name var)
set(list "[")
foreach (value IN LISTS "${var}")
string(APPEND list "\"${value}\", ")
endforeach ()
string(APPEND list "]")
string(REPLACE ", ]" "]" list "${list}")
string(APPEND "${output}" "\"${name}\": ${list}, ")
unset(value)
unset(list)
endmacro ()
#[==[
@ingroup module-support
@brief JSON metadata representation of modules
Information about the modules built and/or available may be dumped to a JSON
file.
~~~
vtk_module_json(
MODULES <module>...
OUTPUT <path>)
~~~
* `MODULES`: (Required) The modules to output information for.
* `OUTPUT`: (Required) A JSON file describing the modules built will
be output to this path. Relative paths are rooted to `CMAKE_BINARY_DIR`.
Example output:
~~~{.json}
{
"modules": [
{
"name": "...",
"library_name": "...",
"enabled": <bool>,
"implementable": <bool>,
"third_party": <bool>,
"wrap_exclude": <bool>,
"kit": "...",
"depends": [
"..."
],
"optional_depends": [
"..."
],
"private_depends": [
"..."
],
"implements": [
"..."
],
"headers": [
"..."
]
}
],
"kits": [
{
"name": "...",
"enabled": <bool>,
"modules": [
]
}
]
}
~~~
#]==]
function (vtk_module_json)
cmake_parse_arguments(_vtk_json
""
"OUTPUT"
"MODULES"
${ARGN})
if (_vtk_json_UNPARSED_ARGUMENTS)
message(FATAL_ERROR
"Unparsed arguments for vtk_module_json: "
"${_vtk_json_UNPARSED_ARGUMENTS}")
endif ()
if (NOT DEFINED _vtk_json_OUTPUT)
message(FATAL_ERROR
"The `OUTPUT` argument is required.")
endif ()
if (NOT _vtk_json_MODULES)
message(FATAL_ERROR "No modules given to output.")
endif ()
if (NOT IS_ABSOLUTE "${_vtk_json_OUTPUT}")
set(_vtk_json_OUTPUT "${CMAKE_BINARY_DIR}/${_vtk_json_OUTPUT}")
endif ()
set(_vtk_json_kits)
set(_vtk_json_contents "{")
string(APPEND _vtk_json_contents "\"modules\": {")
foreach (_vtk_json_module IN LISTS _vtk_json_MODULES)
get_property(_vtk_json_description GLOBAL
PROPERTY "_vtk_module_${_vtk_json_module}_description")
get_property(_vtk_json_implementable GLOBAL
PROPERTY "_vtk_module_${_vtk_json_module}_implementable")
get_property(_vtk_json_third_party GLOBAL
PROPERTY "_vtk_module_${_vtk_json_module}_third_party")
get_property(_vtk_json_wrap_exclude GLOBAL
PROPERTY "_vtk_module_${_vtk_json_module}_wrap_exclude")
get_property(_vtk_json_kit GLOBAL
PROPERTY "_vtk_module_${_vtk_json_module}_kit")
get_property(_vtk_json_depends GLOBAL
PROPERTY "_vtk_module_${_vtk_json_module}_depends")
get_property(_vtk_json_private_depends GLOBAL
PROPERTY "_vtk_module_${_vtk_json_module}_private_depends")
get_property(_vtk_json_optional_depends GLOBAL
PROPERTY "_vtk_module_${_vtk_json_module}_optional_depends")
get_property(_vtk_json_implements GLOBAL
PROPERTY "_vtk_module_${_vtk_json_module}_implements")
get_property(_vtk_json_library_name GLOBAL
PROPERTY "_vtk_module_${_vtk_json_module}_library_name")
get_property(_vtk_json_module_file GLOBAL
PROPERTY "_vtk_module_${_vtk_json_module}_file")
set(_vtk_json_kit_name "null")
if (_vtk_json_kit)
list(APPEND _vtk_json_kits
"${_vtk_json_kit}")
set(_vtk_json_kit_name "\"${_vtk_json_kit}\"")
endif ()
set(_vtk_json_headers "")
if (TARGET "${_vtk_json_module}")
_vtk_module_get_module_property("${_vtk_json_module}"
PROPERTY "headers"
VARIABLE _vtk_json_headers)
get_filename_component(_vtk_json_module_dir "${_vtk_json_module_file}" DIRECTORY)
file(RELATIVE_PATH _vtk_json_module_subdir "${CMAKE_SOURCE_DIR}" "${_vtk_json_module_dir}")
string(REPLACE "${CMAKE_SOURCE_DIR}/${_vtk_json_module_subdir}/" "" _vtk_json_headers "${_vtk_json_headers}")
string(REPLACE "${CMAKE_BINARY_DIR}/${_vtk_json_module_subdir}/" "" _vtk_json_headers "${_vtk_json_headers}")
endif ()
string(APPEND _vtk_json_contents "\"${_vtk_json_module}\": {")
string(APPEND _vtk_json_contents "\"library_name\": \"${_vtk_json_library_name}\", ")
string(APPEND _vtk_json_contents "\"description\": \"${_vtk_json_description}\", ")
_vtk_json_bool(_vtk_json_contents "enabled" "TARGET;${_vtk_json_module}")
_vtk_json_bool(_vtk_json_contents "implementable" _vtk_json_implementable)
_vtk_json_bool(_vtk_json_contents "third_party" _vtk_json_third_party)
_vtk_json_bool(_vtk_json_contents "wrap_exclude" _vtk_json_wrap_exclude)
string(APPEND _vtk_json_contents "\"kit\": ${_vtk_json_kit_name}, ")
_vtk_json_string_list(_vtk_json_contents "depends" _vtk_json_depends)
_vtk_json_string_list(_vtk_json_contents "optional_depends" _vtk_json_optional_depends)
_vtk_json_string_list(_vtk_json_contents "private_depends" _vtk_json_private_depends)
_vtk_json_string_list(_vtk_json_contents "implements" _vtk_json_implements)
_vtk_json_string_list(_vtk_json_contents "headers" _vtk_json_headers)
string(APPEND _vtk_json_contents "}, ")
endforeach ()
string(APPEND _vtk_json_contents "}, ")
string(APPEND _vtk_json_contents "\"kits\": {")
foreach (_vtk_json_kit IN LISTS _vtk_json_kits)
set(_vtk_json_library_name "null")
if (TARGET "${_vtk_json_kit}")
get_property(_vtk_json_library
TARGET "${_vtk_json_kit}"
PROPERTY LIBRARY_OUTPUT_NAME)
set(_vtk_json_library_name "\"${_vtk_json_library}\"")
endif ()
string(APPEND _vtk_json_contents "\"${_vtk_json_kit}\": {")
string(APPEND _vtk_json_contents "\"library_name\": ${_vtk_json_library_name}, ")
_vtk_json_bool(_vtk_json_contents "enabled" "TARGET;${_vtk_json_kit}")
string(APPEND _vtk_json_contents "}, ")
endforeach ()
string(APPEND _vtk_json_contents "}, ")
string(APPEND _vtk_json_contents "}")
string(REPLACE ", ]" "]" _vtk_json_contents "${_vtk_json_contents}")
string(REPLACE ", }" "}" _vtk_json_contents "${_vtk_json_contents}")
file(GENERATE
OUTPUT "${_vtk_json_OUTPUT}"
CONTENT "${_vtk_json_contents}")
endfunction ()