How can I read a property from the command line and use it in my Gradle build.gradle.kts?

Question

Sorry if this is obvious, I'm new to Gradle and I'd like to include the latest git commit tag in my builds.

So far I have this task that simply outputs the string I want to save.

tasks.register<Exec>("get-git-latest") {
    executable("git")
    args("log", "--oneline", "-1", "--format=format:%h", ".")
}

Ideally I'd like to get this output into a variable that can be reused by other Gradle tasks, what is the best way to do this with Kotlin DSL? Any suggestions are welcome.

Does this answer your question? [How to use exec() output in gradle](https://stackoverflow.com/questions/11093223/how-to-use-exec-output-in-gradle) — aSemy, Jan 31 '23 at 17:07
@aSemy I couldn't quite get the kotlin DSL answer towards the bottom of that question to work. I may be missing some fundamental knowledge about how to use variables in my gradle.build.kts — G. Tabs, Jan 31 '23 at 17:35
Or, you could use a plugin? https://github.com/n0mer/gradle-git-properties — User51, Jan 31 '23 at 18:13

score 0 · Accepted Answer · answered Jan 31 '23 at 17:57

Upon revisitng the question that @aSemy linked, I was able to get the value into a variable in my Kotlin DSL like so:

val gitLatestCommit: String = ByteArrayOutputStream().use { outputStream ->
    project.exec {
        executable("git")
        args("log", "--oneline", "-1", "--format=format:%h", ".")
        standardOutput = outputStream
    }
    outputStream.toString()
}

I still need to figure out how to inject this into certain property files, but this is a great start. Thank You.

How can I read a property from the command line and use it in my Gradle build.gradle.kts?

1 Answers1