Generate MANIFEST.MF using Spring Boot and Gradle

I need to add the following headers to the MANIFEST.MF file using Gradle and Spring Boot:

• Name
• Specification-Title
• Specification-Version
• Specification-Vendor

Is there a way to configure the Gradle build process to read these values from settings.gradle and build.gradle and write them to the MANIFEST.MF file?

Writing them to the manifest file is described here: add manifest file to jar with gradle

To populate these values from settings.gradle and gradle.properties, consider the following:

build.gradle

plugins {
    id "idea"
    id "java"
}

jar {
    manifest {
        attributes 'Specification-Title': gradle.ext.jonesVar
        attributes 'Specification-Version': bibibi
    }
}

settings.gradle

gradle.ext.jonesVar = "jones"

gradle.properties

bibibi=3

The result from ./gradlew clean build gives build/libs/tmp.jar containing this manifest:

MANIFEST.MF

Manifest-Version: 1.0
Specification-Title: jones
Specification-Version: 3

If you need to do this for the bootJar, use bootJar { instead of jar { in your build.gradle.