CODEWITHSUNDEEP
cmake
Praveer Kumar
Praveer Kumar

Reputation: 1018

How Do I copy few specific type of files from source to destination directory using cmake commands?

I am completely new to Cmake. My Query might be very simple for you

I want to copy few files from source directory to destination Directory. below is my Source directory structure

SourceDir\tem1.txt
SourceDir\tem1.log
SourceDir\tem1.xml
SourceDir\tem1.js
SourceDir\tem3.xml

SourceDir has another directory Say ChildDir ; below is the structure

SourceDir\ChildDir\tem1.ts
SourceDir\ChildDir\tem4.log
SourceDir\ChildDir\tem5.xml
SourceDir\ChildDir\tem6.js
SourceDir\ChildDir\tem7.xml

I want to copy only .xml and .js file in my destination directory. The output should be as shown below

DestinationDir/tem1.xml
DestinationDir/tem1.js
DestinationDir/tem3.xml
DestinationDir/tem5.xml
DestinationDir/tem6.js
DestinationDir/tem7.xml

below is my incomplete codesnipet

cmake_minimum_required(VERSION 3.2.0)

project(copyFiles)
add_custom_target(temp)

add_custom_command( TARGET temp
                      PRE_BUILD
                      ${CMAKE_COMMAND} -E
                      COPY ${CMAKE_CURRENT_SOURCE_DIR}/SourceDir
 ${CMAKE_CURRENT_BINARY_DIR}/DestinationDir)

Is there any way to update this code snippet to get my work done? or do let me know if there is any other better solution. thanks in advance

Upvotes: 0

Views: 354

Answers (1)

Aurélien Foucault
Aurélien Foucault

Reputation: 559

First step : match all .js and .xml files

You can use the file() with GLOB_RECURSE : 

file (GLOB_RECURSE 
      MY_FILES
      "SourceDir/*.js"
      "SourceDir/*.xml"
)

The GLOB_RECURSE will match all file in the folder and all its subfolders.

Now MY_FILES variable have all your .xml and .js files.

Second step : copy files

Now MY_FILES variable is a list. Definition of a list in CMAKE :

NOTES: A list in cmake is a ; separated group of strings. To create a list the set command can be used. For example, set(var a b c d e) creates a list with a;b;c;d;e, and set(var “a b c d e”) creates a string or a list with one item in it. (Note macro arguments are not variables, and therefore cannot be used in LIST commands.)

Now you have two choices to copy.

At CMake time :

You can use file(COPY) , this will copy file when you do cmake :

file(COPY ${MY_FILES} DESINATION "DestinationDir/")

At make time :

That's the method you use currently. But you need to iterate on the list of MY_FILES. In order to do this you need to use the foreach() loop. The code will be something like :

foreach(MY_FILE ${MY_FILES})
    add_custom_command( TARGET temp
                        PRE_BUILD
                        ${CMAKE_COMMAND} -E
                        COPY ${MY_FILE}
                        ${CMAKE_CURRENT_BINARY_DIR}/DestinationDir
    )
endforeach()

Upvotes: 1

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