# Is the default configuration leaking into independent configurations?
**URL:** https://discuss.gradle.org/t/is-the-default-configuration-leaking-into-independent-configurations/2088
**Category:** Old Forum Archive
**Created:** [July 29, 2014, 7:46am UTC](https://discuss.gradle.org/t/is-the-default-configuration-leaking-into-independent-configurations/2088 "2014-07-29T07:46:00Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@CedricChampeau](https://discuss.gradle.org/u/CedricChampeau)
#### Post date: [July 29, 2014, 7:46am UTC](https://discuss.gradle.org/t/is-the-default-configuration-leaking-into-independent-configurations/2088/1 "2014-07-29T07:46:00Z")
Hi guys,
I would like a clarification about configurations. I was expecting configurations that do not inherit from other configurations to be independent, but it doesn’t seem to be the case. First a bit of context, I’m using Gradle 2.0, and I am working on a plugin for japicmp, a binary compatibility checker. I managed to make it compare two jars, but I would like to propose an alternate task where you would compare two “dependencies”. The idea would be to compare the current output of the project with a previous reference version. For example, in Groovy, compare master, which is 2.4.0-SNAPSHOT, with 2.3.6.
To test that idea, I added this in the build.gradle file:
```gradle
configurations {
japicmp {
transitive = false
}
}
dependencies {
japicmp('org.codehaus.groovy:groovy:2.3.6')
}
```
Then in my japi task:
```gradle
task japicmp(type: me.champeau.gradle.JapicmpTask) {
oldArchive = configurations.japicmp.files[0]
newArchive = jar.archivePath
outputOnlyModifications = true
txtOutputFile = file("$buildDir/reports/japi.txt")
doFirst {
logger.lifecycle("Old: $oldArchive ${configurations.japicmp.asPath}")
}
}
```
And surprise, “oldArchive” is resolved to 2.4.0-SNAPSHOT. Since I expected the japicmp configuration to be independent, it really surprised me, because it seems that the fact our project corresponds to the ‘org.codehaus.groovy:groovy’ artifact participates in the dependency resolution for the ‘japicmp’ configuration. Is this right?
In the end, I don’t want to expose that kind of configuration at use site, but transparently do it in the plugin. Is it doable?
Thanks!
---
### Author:  [@CedricChampeau](https://discuss.gradle.org/u/CedricChampeau)
#### Post date: [July 29, 2014, 8:55am UTC](https://discuss.gradle.org/t/is-the-default-configuration-leaking-into-independent-configurations/2088/2 "2014-07-29T08:55:00Z")
A little more details: dependencyInsight tells me the dependency is overriden by the project:
```gradle
:dependencyInsight
project :
org.codehaus.groovy:groovy:2.3.6 -> project :
\--- project : (*)
(*) - dependencies omitted (listed previously)
```
---
### Author:  [@CedricChampeau](https://discuss.gradle.org/u/CedricChampeau)
#### Post date: [July 29, 2014, 11:26am UTC](https://discuss.gradle.org/t/is-the-default-configuration-leaking-into-independent-configurations/2088/3 "2014-07-29T11:26:00Z")
I tried several tweaks, like:
```gradle
dependencyResolution {
force 'org.codehaus.groovy:groovy:2.3.6'
}
```
or
```gradle
dependencyResolution {
forcedModules = ['org.codehaus.groovy:groovy:2.3.6']
}
```
or
```gradle
resolutionStrategy{
eachDependency { DependencyResolveDetails details ->
if (details.requested.name=='groovy') {
details.useVersion '2.3.6'
}
}
}
```
All without success.
---
### Author:  [@Andres\_Almiray1](https://discuss.gradle.org/u/Andres_Almiray1)
#### Post date: [July 29, 2014, 11:40am UTC](https://discuss.gradle.org/t/is-the-default-configuration-leaking-into-independent-configurations/2088/4 "2014-07-29T11:40:00Z")
Try using a detached configuration like this one
[https://github.com/griffon/griffon/blob/development/subprojects/gradle-griffon-plugin/src/main/groovy/org/codehaus/griffon/gradle/GriffonPluginResolutionStrategy.groovy#L89-L91](https://github.com/griffon/griffon/blob/development/subprojects/gradle-griffon-plugin/src/main/groovy/org/codehaus/griffon/gradle/GriffonPluginResolutionStrategy.groovy#L89-L91)
```gradle
File bomFile = project.configurations.detachedConfiguration(
project.dependencies.create(bomDependency)
).singleFile
```
In your case you’d want to grab a JAR file instead of course 🙂
The gradle-clirr plugin follows a similar approach like yours but I can’t tell if it’s successful or not as it keeps failing on me on every project I try it out [https://github.com/trnl/clirr-gradle-plugin](https://github.com/trnl/clirr-gradle-plugin)
---
### Author:  [@CedricChampeau](https://discuss.gradle.org/u/CedricChampeau)
#### Post date: [July 29, 2014, 12:08pm UTC](https://discuss.gradle.org/t/is-the-default-configuration-leaking-into-independent-configurations/2088/5 "2014-07-29T12:08:00Z")
Thanks Andrés. I tried it but it fails with:
Module version org.codehaus.groovy:groovy:2.4.0-SNAPSHOT, configuration ‘detachedConfiguration2’ declares a dependency on configuration ‘default’ which is not declared in the module descriptor for org.codehaus.groovy:groovy:2.4.0-SNAPSHOT
Does this error tell you something?
---
### Author:  [@CedricChampeau](https://discuss.gradle.org/u/CedricChampeau)
#### Post date: [July 29, 2014, 2:03pm UTC](https://discuss.gradle.org/t/is-the-default-configuration-leaking-into-independent-configurations/2088/6 "2014-07-29T14:03:00Z")
So I managed to have something working but it looks very hackish:
```gradle
private File computeDependency(Object module) {
def oldGroup = project.group
def result = null
try {
project.group = 'virtual_group_for_japicmp'
// convenience wrapping for single file
def depModule = module instanceof File ? project.files(module) : module
def configuration = project.configurations.detachedConfiguration(
project.dependencies.create(depModule) {
if (hasProperty('transitive')) {
transitive = false
}
}
)
result = configuration.singleFile
} finally {
project.group = oldGroup
}
result
}
```
Note how I am forced to change the group of the project. Now it allows me to write:
```gradle
task japicmp(type: me.champeau.gradle.ArtifactJapicmpTask) {
baseline = 'org.codehaus.groovy:groovy:2.3.5'
to = 'org.codehaus.groovy:groovy:2.3.6'
// ...
}
```
or:
```gradle
task japicmp(type: me.champeau.gradle.ArtifactJapicmpTask) {
baseline = 'org.codehaus.groovy:groovy:2.3.5'
to = jar.archivePath
}
```
But (and I’m not sure if it is relevant), this will fail:
```gradle
task japicmp(type: me.champeau.gradle.ArtifactJapicmpTask) {
baseline = 'org.codehaus.groovy:groovy:2.3.5'
to = project
}
```
Error is: Module version virtual\_group\_for\_japicmp:groovy:2.4.0-SNAPSHOT, configuration ‘detachedConfiguration3’ declares a dependency on configuration ‘default’ which is not declared in the module descriptor for virtual\_group\_for\_japicmp:groovy:2.4.0-SNAPSHOT