CMake check that a local file exists

file cmake file-exists
Ferenc Deak picture Ferenc Deak · Oct 25, 2012 · Viewed 68.6k times · Source

In my CMake script I want to see if I have a file on my system, and if it is there do something with it, otherwise do something with a default file. Here is the code:

find_file(
          ${project_name}_${customer}_config 
          ${ROOT}/configuration/${customer}/configuration.${project_name}.xml
)

if(NOT ${${project_name}_${customer}_config} STREQUAL
   ${project_name}_${customer}_config-NOTFOUND )
        configure_file(${ROOT}/configuration/${customer}/configuration.${project_name}.xml
                       ${CMAKE_CURRENT_BINARY_DIR}/conf/configuration.xml)
else()
    configure_file(${FAPP_ROOT}/configuration/Default/configuration.${project_name}.xml
                   ${CMAKE_CURRENT_BINARY_DIR}/conf/configuration.xml)
endif()

But it seems, this is not working.

What is the proper way of checking if a file exists in CMake?

Answer

DLRdave picture DLRdave · Oct 26, 2012

The proper way to check if a file exists, if you already know the full path name to the file is simply:

if(EXISTS "${ROOT}/configuration/${customer}/configuration.${project_name}.xml")
   ...
else()
   ...
endif()

Related questions

How can I merge multiple lists of files together with CMake?

I have a project built with CMake that needs to copy some resources to the destination folder. Currently I use this code: file(GLOB files "path/to/files/*") foreach(file ${files}) ADD_CUSTOM_COMMAND( TARGET MyProject POST_BUILD COMMAND ${CMAKE_…

Read More
How do I check whether a file exists without exceptions?

How do I check if a file exists or not, without using the try statement?

Read More
How to read a file line-by-line into a list?

How do I read every line of a file in Python and store each line as an element in a list? I want to read the file line by line and append each line to the end of the list.

Read More