Infer PADDLE_VERSION macro value from Git tag

[wangkuiyi]

I noticed the following code snippet in /CMakeLists.txt file:

# add PaddlePaddle version
if(DEFINED ENV{PADDLE_VERSION})
    add_definitions(-DPADDLE_VERSION=\"$ENV{PADDLE_VERSION}\")
else()
    if(EXISTS ${PROJ_ROOT}/.svn/)
        find_package(Subversion REQUIRED)
        if(SUBVERSION_FOUND)
            Subversion_WC_INFO(${PROJ_ROOT} Project)
            add_definitions(-DPADDLE_VERSION=${Project_WC_REVISION})
        endif()
    endif()
endif()

It seems that the source code was managed by SVN, but migrated to Git later. So the idea of getting the PADDLE_VERSION macro value from .svn revision does no longer work.

I saw a workaround before above code snippet:

set(PADDLE_MAJOR_VERSION 0)
set(PADDLE_MINOR_VERSION 8)
set(PADDLE_PATCH_VERSION 0b)
set(PADDLE_VERSION ${PADDLE_MAJOR_VERSION}.${PADDLE_MINOR_VERSION}.${PADDLE_PATCH_VERSION})

To understand how the macro PADDLE_VERSION is used, I did:

$ for i in $(du -a | cut -f 2); do if [[ -f $i ]]; then if grep PADDLE_VERSION $i; then echo === $i ===; fi; fi; done
set(CPACK_PACKAGE_VERSION ${PADDLE_VERSION})
=== ./cmake/package.cmake ===
set(PADDLE_VERSION ${PADDLE_MAJOR_VERSION}.${PADDLE_MINOR_VERSION}.${PADDLE_PATCH_VERSION})
if(DEFINED ENV{PADDLE_VERSION})
    add_definitions(-DPADDLE_VERSION=\"$ENV{PADDLE_VERSION}\")
            add_definitions(-DPADDLE_VERSION=${Project_WC_REVISION})
=== ./CMakeLists.txt ===
        echo "PaddlePaddle @PADDLE_VERSION@, compiled with"
=== ./paddle/scripts/submit_local.sh.in ===
#ifndef PADDLE_VERSION
#define PADDLE_VERSION "unknown"
  os << "paddle version: " << PADDLE_VERSION << std::endl << std::boolalpha
=== ./paddle/utils/Version.cpp ===
      version='${PADDLE_VERSION}',
=== ./python/setup.py.in ===

It seems that PADDLE_VERSION is used some way, and it would be reasonable if we can infer its value from Git tags.

I confirm that we can find the tag we are on by running

git describe --tags --abbrev=0

[QiJune]

Yes, PaddlePaddle source code was managed with svn previously. So, paddle version is actually svn version number. And, we have migrated to git a few days ago.
Your advice is really appreciated, we will add paddle version with git later.

[reyoung]

Basically done