Version info module

Module version_info provides data structures and functions that contain information about application version, git hash, build type and other.

Data that is provided by this module is always up-to-date, as Cmake during each west build command run checks whether new version information should be generated.

These checks are possible due to the useful git_watcher.cmake file found on: https://github.com/andrew-hardin/cmake-git-version-tracking.

Setup

1. To your west.yml add the irnas remote to the remotes section:

   - name: ba-rd-ais
     url-base: https://code.bbraun.io/ba-rd-ais

2. Then in the projects section add below snippet at the bottom. You need to manually select revision.

   - name: versioninfo-lib
     repo-path: versioninfo-lib
     path: ba-rd-ais/versioninfo-lib
     remote: ba-rd-ais
     revision: <revision>

How to use this module

1. Module creates a generated file in version_info/generated. Make sure that generated folder is kept out of version control.

2. Enable module in your prj.conf:

CONFIG_VERSION_INFO=y

You can now include header file in the source file of your choice and start using its functions.

Build type

User can specify what kind of build type is used for the project being built. Build type is available as a .build_type, a member of the version_info struct.

Build type can be either set manually in a KConfig file or automatically with East.

[!Note] Both examples are show in this repository, inside the app folder.

Setting it manually

Place below two lines in a prj.conf file. .build_type is now set to "basic".

CONFIG_VERSION_INFO_APP_BUILD_TYPE_USER=y
CONFIG_VERSION_INFO_APP_BUILD_TYPE="basic"

Setting it automatically

Place your project into east.yml file. Refer to the East's documentation on how to do that. East will provide build type via EAST_BUILD_TYPE define. Version info library picks up this define and places it into the code.

Expanding the module

If you want to add more git related strings to this module you will have to do this in several places:

1. Register new variable in git_watcher.cmake file to _state_variable_names variable.
2. Fill new variable at the end of GetGitState function, look above to see how previous variables are assigned.
3. Add a new variable in generated_version_info.h.in file as a define statement, make sure that is placed between @ signs like others are.
4. Use the new define in version_info.c file.