Set cmake project description with commit id-CodePudding

I just learned how I can use

project(ProjectName VERSION 1.0)

and the configure_file to play with the version and embed it into the binary.

On project documentation I see it also accept a description string.

project(ProjectName VERSION 1.0 description_string)

So I want to use the commit id as the description string. I can read commit id from command line with git rev-parse HEAD but how can I use that to set the description?

CodePudding user response：

You can use FindGit module to find a git executable and then run it with execute_process to get the result, so something like this:

find_package(Git REQUIRED)
execute_process(COMMAND "${GIT_EXECUTABLE}" rev-parse HEAD OUTPUT_VARIABLE COMMIT_ID OUTPUT_STRIP_TRAILING_WHITESPACE)
project(ProjectName VERSION 1.0 DESCRIPTION "${COMMIT_ID}")