How to set project.version by passing version property on gradle command line?

Question

I want to build JAR with self-defined version passed via command line, such as:

When I execute gradle build task like this:

gradle build -Pversion=1.0 

myproject-1.0.jar should be generated.

I have tried adding the line below to the build.gradle, but it did not work:

version = project.hasProperty('version') ? project['version'] : '10.0.0' 

Answer 1

Set the property only in the gradle.properties file (i.e. remove it from build.gradle). Also make sure the options come before the command (as mentioned above).

gradle.properties contents:

version=1.0.12 

Version can then be overridden on the command line with:

gradle -Pversion=1.0.13 publish 

Answer 2

You are not able to override existing project properties from command line, take a look here. So try to rename a version variable to something differing from version and set it with -P flag before command, like:

gradle -PprojVersion=10.2.10 build  

And then in your build.gradle

if (project.hasProperty('projVersion')) {   project.version = project.projVersion } else {   project.version = '10.0.0' } 

Or as you did with ?: operator