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UseJava: clean class files from previous builds

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If java_class_filelist exists, remove previous class files before building the
new ones. If java_sources content has changed, clean and rebuild the class
files of the target.

Fixes: #20377
This commit is contained in:
Alexey Karndshev 2020-02-21 11:46:40 +01:00 committed by Alexey Karandashev
parent 25ca8e5ce5
commit 4559eb490a
2 changed files with 26 additions and 2 deletions
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11
Modules/UseJava.cmake
View File

@ -597,7 +597,10 @@ function(add_jar _TARGET_NAME)
# Create the list of files to compile.
set(_JAVA_SOURCES_FILE ${CMAKE_JAVA_CLASS_OUTPUT_PATH}/java_sources)
string(REPLACE ";" "\"\n\"" _JAVA_COMPILE_STRING "\"${_JAVA_COMPILE_FILES}\"")
file(WRITE ${_JAVA_SOURCES_FILE} ${_JAVA_COMPILE_STRING})
set(CMAKE_CONFIGURABLE_FILE_CONTENT "${_JAVA_COMPILE_STRING}")
configure_file("${CMAKE_ROOT}/Modules/CMakeConfigurableFile.in"
"${_JAVA_SOURCES_FILE}" @ONLY)
unset(CMAKE_CONFIGURABLE_FILE_CONTENT)
list (APPEND _JAVA_SOURCES_FILELISTS "@${_JAVA_SOURCES_FILE}")
endif()
if (_JAVA_COMPILE_FILELISTS)
@ -610,6 +613,10 @@ function(add_jar _TARGET_NAME)
add_custom_command(
# NOTE: this command generates an artificial dependency file
OUTPUT ${CMAKE_JAVA_CLASS_OUTPUT_PATH}/java_compiled_${_TARGET_NAME}
COMMAND ${CMAKE_COMMAND}
-DCMAKE_JAVA_CLASS_OUTPUT_PATH=${CMAKE_JAVA_CLASS_OUTPUT_PATH}
-DCMAKE_JAR_CLASSES_PREFIX="${CMAKE_JAR_CLASSES_PREFIX}"
-P ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/UseJava/ClearClassFiles.cmake
COMMAND ${Java_JAVAC_EXECUTABLE}
${CMAKE_JAVA_COMPILE_FLAGS}
-classpath "${CMAKE_JAVA_INCLUDE_PATH_FINAL}"
@ -617,7 +624,7 @@ function(add_jar _TARGET_NAME)
${_GENERATE_NATIVE_HEADERS}
${_JAVA_SOURCES_FILELISTS}
COMMAND ${CMAKE_COMMAND} -E touch ${CMAKE_JAVA_CLASS_OUTPUT_PATH}/java_compiled_${_TARGET_NAME}
DEPENDS ${_JAVA_COMPILE_FILES} ${_JAVA_COMPILE_FILELISTS} ${_JAVA_COMPILE_DEPENDS}
DEPENDS ${_JAVA_COMPILE_FILES} ${_JAVA_COMPILE_FILELISTS} ${_JAVA_COMPILE_DEPENDS} ${_JAVA_SOURCES_FILE}
WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
COMMENT "Building Java objects for ${_TARGET_NAME}.jar"
)

17
Modules/UseJava/ClearClassFiles.cmake Normal file
View File

@ -0,0 +1,17 @@
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
# This script deletes compiled Java class files.
if(CMAKE_JAVA_CLASS_OUTPUT_PATH)
if(EXISTS "${CMAKE_JAVA_CLASS_OUTPUT_PATH}/java_class_filelist")
file(STRINGS "${CMAKE_JAVA_CLASS_OUTPUT_PATH}/java_class_filelist" classes)
list(TRANSFORM classes PREPEND "${CMAKE_JAVA_CLASS_OUTPUT_PATH}/")
if(classes)
file(REMOVE ${classes})
message(STATUS "Clean class files from previous build")
endif()
endif()
else()
message(FATAL_ERROR "Can't find CMAKE_JAVA_CLASS_OUTPUT_PATH")
endif()