[CMake] How to force package target generate a file before proceeding

[Shyrokov, Sasha]

Thanks Roman for the detailed response. I would like the hash generated when I use “make package” command, not “make install”. I can see that my hgHash.cmake is included,  but it does not run on “make package”.

Thanks,
Sasha

From: Roman Bolshakov [mailto:roolebo at gmail.com]
Sent: Wednesday, February 18, 2015 8:23 PM
To: Shyrokov, Sasha
Cc: cmake at cmake.org
Subject: Re: [CMake] How to force package target generate a file before proceeding

add_custom_command is rather used for operations performed during build phase (which is completely separate off packaging)

You could create hgHash.txt during packaging by using install(SCRIPT) command:
install(SCRIPT hgHash.cmake)
install(
  FILES hgHash.txt
  DESTINATION yourapp
)

Hypothetical hgHash.cmake would be quite straightforward:
message(STATUS "Getting hg hash")
execute_process(
  COMMAND hg --debug id -i
  OUTPUT_FILE hgHash.txt
)

That would create hgHash.txt unconditionally during each cpack/make install/cmake -P cmake_install.cmake invocation

-Roman


On Wed, Feb 18, 2015 at 12:55 AM, Shyrokov, Sasha <Sasha-Shyrokov at idexx.com<mailto:Sasha-Shyrokov at idexx.com>> wrote:

Hi,

I would like to include a generated file into a package. I have something like that:
include(CPack)

add_custom_command (OUTPUT hgHash.txt
COMMAND hg --debug id -i >hgHash.txt
COMMENT "Getting hg hash")

add_custom_target (hg_hash
DEPENDS hgHash.txt
COMMENT "hg_hash target")

Now the following would solve my problems, but it does not work:
add_dependencies(package hg_hash)

I get:
Cannot add target-level dependencies to non-existent target "package".

I know I have CPack configured properly, because if I create the file manually it gets included. I also can add the dependency on one of my libraries, but I only want to generate this file when package is executed.

What am I missing?

Thanks,
Sasha


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