I am using the following cmake command to extract a zip file
${CMAKE_COMMAND} -E tar xkf
This unzip the file as it is.
I'd like to AVOID unzipping when the file has been already unzipped.
How can I do that? It seems that there is no option for that purpose.
Add an dependency.
The result of the unzip operation has to be used within a later build step. Add the dependency between the unzip and that build step.
Use add_custom_command to unzip files and copy them to the expected folder
Extend your target by a dependency to the extracted files
The following example shows this for the target TTNLIB.
Example:
add_custom_command(OUTPUT ${CMAKE_SOURCE_DIR}/src/ttnbitvector.cpp
COMMAND ${CMAKE_COMMAND} -E tar xkf ${CMAKE_SOURCE_DIR}/external/ttnbitvector.cpp.zip -C ${CMAKE_SOURCE_DIR}/external
COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_SOURCE_DIR}/external/ttnbitvector.cpp ${CMAKE_SOURCE_DIR}/src/ttnbitvector.cpp
WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/external
COMMENT Extract ${CMAKE_SOURCE_DIR}/src/ttnbitvector.cpp
)
add_library(TTNLIB SHARED ${SOURCES} ${CMAKE_SOURCE_DIR}/src/ttnbitvector.cpp)
Note: Read the documentation of add_custom_command
See cmake solutions for further information.
Related
I want to copy a file from the source directory to the binary directory when running make or make all if the file has been modified. So if only this file has been modified, then no libraries or executables should be rebuilt when running make. Only the file should be copied. I tried several approaches, for example:
cmake_minimum_required(VERSION 3.18)
project(copy-file VERSION 1.0 DESCRIPTION "testing copy file if modified on make all")
set(FILE_PATH "some_dir/file.txt")
add_executable(hello hello.c)
#add_custom_command(
# OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${FILE_PATH}
# COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_SOURCE_DIR}/${FILE_PATH} ${CMAKE_CURRENT_BINARY_DIR}/${FILE_PATH}
# MAIN_DEPENDENCY ${CMAKE_CURRENT_SOURCE_DIR}/${FILE_PATH})
add_custom_command(
TARGET hello
POST_BUILD
COMMAND ${CMAKE_COMMAND} -E copy
${CMAKE_CURRENT_SOURCE_DIR}/${FILE_PATH} ${CMAKE_CURRENT_BINARY_DIR}/${FILE_PATH})
#configure_file(${FILE_PATH} ${FILE_PATH} COPYONLY)
Unfortunately, this only copies file.txt (when running make) if hello.c has been modified. If hello.c has not been modified, but file.txt has been modified, nothing happens when I run make (whereas I expected the file to be copied from the source directory to the binary directory)
Here is a link to the source files I used for this minimal example.
Any ideas what I am missing?
Do not use POST_BUILD on a custom target. Specify input and output and let CMake take care of the dependency.
add_custom_command(
OUTPUT
${CMAKE_CURRENT_BINARY_DIR}/${FILE_PATH}
DEPENDS
${CMAKE_CURRENT_SOURCE_DIR}/${FILE_PATH}
COMMAND
${CMAKE_COMMAND} -E copy_if_different
${CMAKE_CURRENT_SOURCE_DIR}/${FILE_PATH}
${CMAKE_CURRENT_BINARY_DIR}/${FILE_PATH}
)
add_custom_target(copy DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${FILE_PATH})
Following the suggestion of #vre and adding copy_if_different instead of copy and then adding add_custom_target() that can be used with the custom command like this seems to work now:
cmake_minimum_required(VERSION 3.18)
project(copy-file VERSION 1.0 DESCRIPTION "testing copy file if modified on make all")
set(FILE_PATH "some_dir/file.txt")
add_executable(hello hello.c)
add_custom_target(copy ALL )
add_custom_command(
TARGET copy
PRE_BUILD
COMMAND ${CMAKE_COMMAND} -E copy_if_different
${CMAKE_CURRENT_SOURCE_DIR}/${FILE_PATH} ${CMAKE_CURRENT_BINARY_DIR}/${FILE_PATH})
I want to bundle the build artifacts into a zip to deliver them on the delivery server. That for I integrated the zip creation into the CMake routine.
# zip the final release files into the build artifact
# call the zipping with 'cmake --build . --target zip' or 'make zip'
string(TIMESTAMP DATE_STRING %Y%m%d)
add_custom_target(zip
COMMAND ${CMAKE_COMMAND} -E tar "cfv" "${PROJECT_NAME}-${PROJECT_VERSION}-${CMAKE_CXX_COMPILER_ID}-${CMAKE_CXX_COMPILER_VERSION}-${DATE_STRING}.zip" "--format=zip" "--"
"${PROJECT_SOURCE_DIR}/bin/release/*")
The artifacts are bundeld into the bin/release folder in the ProjectSourceDir.
My problem is, that the zip file has the relative path to the files from my build directory. So all files are located under ../bin/release/ which is not what I want. I want to have the files in the "home folder" of the zip file.
I've found the solution to prepare the zip folder in my build folder, but thats something I think is very unpractical or looks dirty to me.
A WORKING_DIRECTORY can be specified to the add_custom command.
add_custom_target(zip
COMMAND ${CMAKE_COMMAND} -E tar cvf ${PROJECT_SOURCE_DIR}/${PROJECT_NAME}-${PROJECT_VERSION}-${CMAKE_CXX_COMPILER_ID}-${CMAKE_CXX_COMPILER_VERSION}-${DATE_STRING}.zip --format=zip .
WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}/bin/release
)
You don't need all that extra quoting as given in the example.
I am currently using execute_command to unzip some files before building.
I would like to unzip the folder that is in effect replace the old files with new file in the destination folder when the zip file in the source changes. Can anyone give me some suggestions?
Currently I am doing something like this,
execute_process(
COMMAND ${CMAKE_COMMAND} -E tar xzf ${CMAKE_SOURCE_DIR}/abc.zip
WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
)
I tried with add_custom_command() but I am executing it for every build.
I only want it to unzip if the source zip file changes.
add_custom_command( OUTPUT ${LibsList}
COMMAND ${CMAKE_COMMAND} -E tar xzf ${CMAKE_SOURCE_DIR}/libs.zip
WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
DEPENDS ${CMAKE_SOURCE_DIR}/libs.zip )
They mostly contain header files and a few shared libraries. I usually need the header files at build time and shared libraries at run time. If possible I would not give the list of files in OUTPUT as it is very large
I achieve this, at least for my scenario using the code below,
add_custom_target( unZip ALL)
add_custom_command(TARGET unZip PRE_BUILD
COMMAND ${CMAKE_COMMAND} -E remove_directory ${CMAKE_BINARY_DIR}/abc/
COMMAND ${CMAKE_COMMAND} -E tar xzf {CMAKE_SOURCE_DIR}/abc.zip
WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
DEPENDS ${CMAKE_SOURCE_DIR}/abc.zip
COMMENT "Unpacking abc.zip"
VERBATIM)
Now I made all target dependent on "unZip". This way when rebuilding unZip occurs or at build time if abc.zip changes, unZip occurs.
I'm trying to create a simple project on CLion. It uses CMake to generate Makefiles to build project (or some sort of it)
All I need to is transfer some non-project file (some sort of resource file) to binary directory each time when I run the my code.
That file contains test data and application open it to read them. I tried several ways to do so:
Via file(COPY ...
file(COPY ${CMAKE_CURRENT_SOURCE_DIR}/input.txt
DESTINATION ${CMAKE_CURRENT_BINARY_DIR}/input.txt
Looking good but it work just once and not recopy file after next run.
Via add_custom_command
OUTPUT version
add_custom_command(
OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/input.txt
COMMAND ${CMAKE_COMMAND} -E copy
${CMAKE_CURRENT_SOURCE_DIR}/input.txt
${CMAKE_CURRENT_BINARY_DIR}/input.txt)
TARGET version
add_custom_target(foo)
add_custom_command(
TARGET foo
COMMAND ${CMAKE_COMMAND} copy
${CMAKE_CURRENT_BINARY_DIR}/test/input.txt
${CMAKE_SOURCE_DIR})
But no one of it work.
What am I doing wrong?
You may consider using configure_file with the COPYONLY option:
configure_file(<input> <output> COPYONLY)
Unlike file(COPY ...) it creates a file-level dependency between input and output, that is:
If the input file is modified the build system will re-run CMake to re-configure the file and generate the build system again.
Both option are valid and targeting two different steps of your build:
file(COPY ... copies the file during the configuration step and only in this step. When you rebuild your project without having changed your cmake configuration, this command won't be executed.
add_custom_command is the preferred choice when you want to copy the file around on each build step.
The right version for your task would be:
add_custom_command(
TARGET foo POST_BUILD
COMMAND ${CMAKE_COMMAND} -E copy
${CMAKE_SOURCE_DIR}/test/input.txt
${CMAKE_CURRENT_BINARY_DIR}/input.txt)
you can choose between PRE_BUILD, PRE_LINK, POST_BUILD
best is you read the documentation of add_custom_command
An example on how to use the first version can be found here: Use CMake add_custom_command to generate source for another target
The first of option you tried doesn't work for two reasons.
First, you forgot to close the parenthesis.
Second, the DESTINATION should be a directory, not a file name. Assuming that you closed the parenthesis, the file would end up in a folder called input.txt.
To make it work, just change it to
file(COPY ${CMAKE_CURRENT_SOURCE_DIR}/input.txt
DESTINATION ${CMAKE_CURRENT_BINARY_DIR})
I would suggest TARGET_FILE_DIR if you want the file to be copied to the same folder as your .exe file.
$
Directory of main file (.exe, .so.1.2, .a).
add_custom_command(
TARGET ${PROJECT_NAME} POST_BUILD
COMMAND ${CMAKE_COMMAND} -E copy
${CMAKE_CURRENT_SOURCE_DIR}/input.txt
$<TARGET_FILE_DIR:${PROJECT_NAME}>)
In VS, this cmake script will copy input.txt to the same file as your final exe, no matter it's debug or release.
The suggested configure_file is probably the easiest solution. However, it will not rerun the copy command to if you manually deleted the file from the build directory. To also handle this case, the following works for me:
add_custom_target(copy-test-makefile ALL DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/input.txt)
add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/input.txt
COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_SOURCE_DIR}/input.txt
${CMAKE_CURRENT_BINARY_DIR}/input.txt
DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/input.txt)
if you want to copy folder from currant directory to binary (build folder) folder
file(COPY ${CMAKE_CURRENT_SOURCE_DIR}/yourFolder/ DESTINATION ${CMAKE_CURRENT_BINARY_DIR}/yourFolder/)
then the syntexe is :
file(COPY pathSource DESTINATION pathDistination)
This is what I used to copy some resource files:
the copy-files is an empty target to ignore errors
add_custom_target(copy-files ALL
COMMAND ${CMAKE_COMMAND} -E copy_directory
${CMAKE_BINARY_DIR}/SOURCEDIRECTORY
${CMAKE_BINARY_DIR}/DESTINATIONDIRECTORY
)
If you want to put the content of example into install folder after build:
code/
src/
example/
CMakeLists.txt
try add the following to your CMakeLists.txt:
install(DIRECTORY example/ DESTINATION example)
I am attempting to copy multiple files using the ${CMAKE_COMMAND} -E copy <from> <to> format, but I was wondering if there was a way to provide a number of files to copy to a specific directory. It seems the cmake copy only allows for one file to be copied at a time. I really don't want to use the copy command repeatedly when I would rather provide a list of files to copy as the first argument.
I'm thinking the easiest solution is to use the platform dependent "cp" command. While this definitely is not good for portability, our system is guaranteed to be built on Linux. A simple, platform independent solution would be better.
Copying multiple files is available from CMake 3.5
cmake -E copy <file>... <destination>
"cmake -E copy" support for multiple files
Command-Line Tool Mode
I did it with a loop
# create a list of files to copy
set( THIRD_PARTY_DLLS
C:/DLLFOLDER/my_dll_1.dll
C:/DLLFOLDER/my_dll_2.dll
)
# do the copying
foreach( file_i ${THIRD_PARTY_DLLS})
add_custom_command(
TARGET ${VIEWER_NAME}
POST_BUILD
COMMAND ${CMAKE_COMMAND}
ARGS -E copy ${file_i} "C:/TargetDirectory"
)
endforeach( file_i )
A relatively simple workaround would be to use ${CMAKE_COMMAND} -E tar to bundle the sources, move the tarball and extract it in the destination directory.
This could be more trouble than it's worth if your sources are scattered across many different directories, since extracting would retain the original directory structure (unlike using cp). If all the files are in one directory however, you could achieve the copy in just 2 add_custom_command calls.
Say your sources to be moved are all in ${CMAKE_SOURCE_DIR}/source_dir, the destination is ${CMAKE_SOURCE_DIR}/destination_dir and your list of filenames (not full paths) are in ${FileList}. You could do:
add_custom_command(
TARGET MyExe POST_BUILD
COMMAND ${CMAKE_COMMAND} -E tar cfj ${CMAKE_BINARY_DIR}/temp.tar ${FileList}
WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/source_dir)
add_custom_command(
TARGET MyExe POST_BUILD
COMMAND ${CMAKE_COMMAND} -E rename ${CMAKE_BINARY_DIR}/temp.tar temp.tar
COMMAND ${CMAKE_COMMAND} -E tar xfj temp.tar ${FileList}
COMMAND ${CMAKE_COMMAND} -E remove temp.tar
WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/destination_dir)
Since I had more or less exactly the same issue and didn't like the solutions above I eventually came up with this. It does more than just copy files, but I thought I would post the whole thing as it shows the flexibility of the the technique in conjunction with generator expressions that allow different files and directories depending on the build variant. I believe the COMMAND_EXPAND_LISTS is critical to the functionality here.
This function not only copies some files to a new directory but then runs a command on each of them. In this case it uses the microsoft signtool program to add digital signatures to each file.
cmake_minimum_required (VERSION 3.12)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
SET(ALL_3RD_PARTY_DLLS_DEBUG "${CMAKE_CURRENT_SOURCE_DIR}/file1.dll" "${CMAKE_CURRENT_SOURCE_DIR}/file2.dll")
SET(ALL_3RD_PARTY_DLLS_RELEASE "${CMAKE_CURRENT_SOURCE_DIR}/file3.dll" "${CMAKE_CURRENT_SOURCE_DIR}/file4.dll")
STRING(REPLACE "${CMAKE_CURRENT_SOURCE_DIR}" ";${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/Debug" ALL_OUTPUT_3RD_PARTY_DLLS_DEBUG ${ALL_3RD_PARTY_DLLS_DEBUG})
LIST(REMOVE_AT ALL_OUTPUT_3RD_PARTY_DLLS_DEBUG 0)
STRING(REPLACE "${CMAKE_CURRENT_SOURCE_DIR}" ";${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/Release" ALL_OUTPUT_3RD_PARTY_DLLS_RELEASE ${ALL_3RD_PARTY_DLLS_RELEASE})
LIST(REMOVE_AT ALL_OUTPUT_3RD_PARTY_DLLS_RELEASE 0)
FILE(TO_NATIVE_PATH "C:\\Program\ Files\ (x86)\\Windows\ Kits\\10\\bin\\10.0.17763.0\\x86\\signtool.exe" SIGNTOOL_COMMAND)
add_custom_target(Copy3rdPartyDLLs ALL
COMMENT "Copying and signing 3rd Party DLLs"
VERBATIM
COMMAND_EXPAND_LISTS
COMMAND ${CMAKE_COMMAND} -E
make_directory "${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/$<$<CONFIG:Release>:Release>$<$<CONFIG:Debug>:Debug>/"
COMMAND ${CMAKE_COMMAND} -E
copy_if_different
"$<$<CONFIG:Release>:${ALL_3RD_PARTY_DLLS_RELEASE}>"
"$<$<CONFIG:Debug>:${ALL_3RD_PARTY_DLLS_DEBUG}>"
"${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/$<$<CONFIG:Release>:Release>$<$<CONFIG:Debug>:Debug>/"
COMMAND ${SIGNTOOL_COMMAND} sign
"$<$<CONFIG:Release>:${ALL_OUTPUT_3RD_PARTY_DLLS_RELEASE}>"
"$<$<CONFIG:Debug>:${ALL_OUTPUT_3RD_PARTY_DLLS_DEBUG}>"
)
I hope this saves someone the day or so it took me to figure this out.