Project.property(name) does not take value from 'ancestor'

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1

Either I do not correctly understand what is the ‘ancestor’ projects in terms of Gradle or project.property(name) does not work according to spec of project.property(name):

6 . Search up through this project’s ancestor projects for a convention property or extra property with the given name.

In the test project (child-l1:child-l2) below I expect this to be printed (because values are redefined in the immediate parent project child-l1):

version = '1.2.3(child-l1)'
extProp = 'extProp-ValueFromChildL1'
extProp1 = 'extProp-ValueFromChildL1'

but I’m getting following (values are taken from root gradle.properties)

version = 1.2.3(gradle.properties)
extProp = extProp-ValueFromGradleProperties
extProp1 = extProp1-ValueFromGradleProperties

Test project is attached and its files are provided below. For the test, i’m running

gradle none

in the folder ./child-l1/child-l2. Gradle version is 1.10

settings.gradle

println 'Evaluating settings'

rootProject.name = 'test'

include 'child-l1'
include 'child-l1:child-l2'

gradle.properties

#org.gradle.configureondemand=false
version=1.2.3(gradle.properties)
extProp=extProp-ValueFromGradleProperties
extProp1=extProp1-ValueFromGradleProperties

build.gradle

println 'Evaluating root'

project.version='1.2.3(root)'
project.ext.extProp = 'extProp-ValueFromRoot'
project.metaClass.extProp1 = 'extProp-ValueFromRoot'

./child-l1/build.gradle 

println 'Evaluating child-l1'

project.version='1.2.3(child-l1)'
project.ext.extProp = 'extProp-ValueFromChildL1'
project.metaClass.extProp1 = 'extProp-ValueFromChildL1'

./child-l1/child-l2/build.gradle 

println 'Evaluating child-l2'

println 'version=' + project.version
println 'extProp=' + project.property('extProp')
println 'extProp1=' + project.property('extProp1')

println 'extProp(parent)=' + project.parent.property('extProp')

task none {}

test-project.zip (1.5 KB)

2

I’ve got why it is working this way - it appears that values from root ‘gradle.properties’ are fed into project.ext of every sub-module before evaluation. This way - property will be available immediately in each project, but it will not be possible to redefine value in parent for child projects.

I guess it would be better to feed ‘gradle.properties’ only into ‘rootProject.ext’. Child projects should lookup value in parents and have ability to (optionally) redefine value for self and child projects.

3

I’ve tried to workaround the problem by moving ‘non-global’ properties from gradle.properties into root build.gradle. Apart from being non-natural to define build properties explicitly in build.gradle, it also just does not work reliably:

  • project.version is nor inherited to children and nor evaluated from ancestors - thus always undefined
  • with org.gradle.configureondemand=true intermediate parent project is not evaluated and therefore behavior is different:

when

  • configureondemand=true - output is extProp=extProp-ValueFromRoot
  • configureondemand=false - output is extProp=extProp-ValueFromChildL1

So … it seems there is no reliable workaround for that problem.

4

Regarding inheritance of project version into children - it may be not applicable to most of projects, but in my case each sub-tree of sub-modules has own version and I’d like to set it once in the sub-tree root for all its children.