# DefaultSourceDirectorySet Alternative **URL:** \ **Category:** Help/Discuss\ **Tags:** plugins\ **Created:** [March 15, 2016, 2:09pm UTC](https://discuss.gradle.org/t/defaultsourcedirectoryset-alternative/15193 "2016-03-15T14:09:25Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![daniel\_lew](https://sea1.discourse-cdn.com/gradle/user_avatar/discuss.gradle.org/daniel_lew/32/1171_2.png) [@daniel\_lew](https://discuss.gradle.org/u/daniel_lew)\ **Post date:** [March 15, 2016, 2:09pm UTC](https://discuss.gradle.org/t/defaultsourcedirectoryset-alternative/15193/1 "2016-03-15T14:09:25Z")
I’ve been using `DefaultSourceDirectorySet` in [my plugin](https://github.com/trello/victor) for a while now, in order to add a source set extension for an Android plugin: ```gradle project.android.sourceSets.all { sourceSet -> sourceSet.extensions.create('svg', DefaultSourceDirectorySet, 'svg', project.fileResolver) } ``` It looks like things have changed in Gradle 2.12 which now crashes when I use `DefaultSourceDirectorySet`, which is fine, since it is an internal API. (In particular, it gives the message “Could not create an instance of type org.gradle.api.internal.file.DefaultSourceDirectorySet\_Decorated.”) The question I have then is, what is the alternative? Do I need to implement my own `SourceDirectorySet`? Or is there some public way of doing this easily that I am just unaware of? ---
**Author:** ![st\_oehme](https://sea1.discourse-cdn.com/gradle/user_avatar/discuss.gradle.org/st_oehme/32/5249_2.png) [@st\_oehme](https://discuss.gradle.org/u/st_oehme)\ **Post date:** [March 15, 2016, 2:19pm UTC](https://discuss.gradle.org/t/defaultsourcedirectoryset-alternative/15193/2 "2016-03-15T14:19:16Z")
> [@daniel\_lew](#): > > Do I need to implement my own SourceDirectorySet? That’s currently the way to go, yes. ---
**Author:** ![Lance\_Java](https://sea1.discourse-cdn.com/gradle/user_avatar/discuss.gradle.org/lance_java/32/787_2.png) [@Lance\_Java](https://discuss.gradle.org/u/Lance_Java)\ **Post date:** [March 15, 2016, 2:24pm UTC](https://discuss.gradle.org/t/defaultsourcedirectoryset-alternative/15193/3 "2016-03-15T14:24:17Z")
Another option which still uses internal classes but is likely to be more ‘future proof’ ```gradle SourceDirectorySetFactory factory = project.gradle.services.get(SourceDirectorySetFactory) DefaultSourceDirectorySet sds = factory.create("svg") ``` ---
**Author:** ![daniel\_lew](https://sea1.discourse-cdn.com/gradle/user_avatar/discuss.gradle.org/daniel_lew/32/1171_2.png) [@daniel\_lew](https://discuss.gradle.org/u/daniel_lew)\ **Post date:** [March 15, 2016, 3:10pm UTC](https://discuss.gradle.org/t/defaultsourcedirectoryset-alternative/15193/4 "2016-03-15T15:10:54Z")
Wait, seriously? The best solution is for everyone to implement an interface with a couple dozen methods? ---
**Author:** ![st\_oehme](https://sea1.discourse-cdn.com/gradle/user_avatar/discuss.gradle.org/st_oehme/32/5249_2.png) [@st\_oehme](https://discuss.gradle.org/u/st_oehme)\ **Post date:** [March 15, 2016, 4:02pm UTC](https://discuss.gradle.org/t/defaultsourcedirectoryset-alternative/15193/5 "2016-03-15T16:02:38Z")
> [@daniel\_lew](#): > > The best solution is for everyone to implement an interface with a couple dozen methods? Note that you don’t _have to_ implement `SourceDirectorySet`. You can define an interface with just the API you care about yourself, like I did for instance in the [Xtext plugin](https://github.com/xtext/xtext-gradle-plugin/blob/master/xtext-gradle-plugin/src/main/java/org/xtext/gradle/tasks/XtextSourceDirectorySet.xtend). I currently don’t know of a plan to make the `DefaultSourceDirectorySet` of the current Gradle model public. The new software model already provides a public API for defining custom [LanguageSourceSets](https://docs.gradle.org/current/dsl/org.gradle.language.base.LanguageSourceSet.html). ---
**Author:** ![IgorGanapolsky](https://sea1.discourse-cdn.com/gradle/user_avatar/discuss.gradle.org/igorganapolsky/32/2665_2.png) [@IgorGanapolsky](https://discuss.gradle.org/u/IgorGanapolsky)\ **Post date:** [March 16, 2016, 12:55am UTC](https://discuss.gradle.org/t/defaultsourcedirectoryset-alternative/15193/6 "2016-03-16T00:55:50Z")
Then how to use this factory in place of `DefaultSourceDirectorySet`? ---
**Author:** ![Lance\_Java](https://sea1.discourse-cdn.com/gradle/user_avatar/discuss.gradle.org/lance_java/32/787_2.png) [@Lance\_Java](https://discuss.gradle.org/u/Lance_Java)\ **Post date:** [March 16, 2016, 2:37am UTC](https://discuss.gradle.org/t/defaultsourcedirectoryset-alternative/15193/7 "2016-03-16T02:37:25Z")
```gradle project.android.sourceSets.all { sourceSet -> sourceSet.extensions.add('svg', factory.create('svg')) } ``` ---
**Author:** ![Schalk\_Cronje](https://sea1.discourse-cdn.com/gradle/user_avatar/discuss.gradle.org/schalk_cronje/32/6511_2.png) [@Schalk\_Cronje](https://discuss.gradle.org/u/Schalk_Cronje)\ **Post date:** [March 31, 2016, 3:12pm UTC](https://discuss.gradle.org/t/defaultsourcedirectoryset-alternative/15193/8 "2016-03-31T15:12:14Z")
Another alternative, as described in Idiomatic Gradle, is to use some metaprogramming to work around it and maintain compatibility from Gradle 2.0 - 2.12. An example is here - [https://github.com/ysb33r/gradle-mirah-plugin/blob/master/src/main/groovy/org/ysb33r/gradle/mirah/MirahSourceSet.groovy#L69](https://github.com/ysb33r/gradle-mirah-plugin/blob/master/src/main/groovy/org/ysb33r/gradle/mirah/MirahSourceSet.groovy#L69) **P.S Some self-promotion following** : You can also read about this in the (free) sample version of Idiomatic Gradle at [http://samples.leanpub.com/idiomaticgradle-sample.pdf](http://samples.leanpub.com/idiomaticgradle-sample.pdf) (Just go to the _Add SourceSet Support for JVM Language_ recipe). ---
**Author:** ![Lance\_Java](https://sea1.discourse-cdn.com/gradle/user_avatar/discuss.gradle.org/lance_java/32/787_2.png) [@Lance\_Java](https://discuss.gradle.org/u/Lance_Java)\ **Post date:** [March 31, 2016, 3:52pm UTC](https://discuss.gradle.org/t/defaultsourcedirectoryset-alternative/15193/9 "2016-03-31T15:52:28Z")
I, personally, would maintain backwards compatability via: ```gradle import org.gradle.util.GradleVersion boolean useFactory = GradleVersion.current().compareTo(GradleVersion.version("2.12")) >= 0 project.android.sourceSets.all { sourceSet -> if (useFactory) { SourceDirectorySetFactory factory = project.gradle.services.get(SourceDirectorySetFactory) sourceSet.extensions.add('svg', factory.create('svg')) } else { sourceSet.extensions.create('svg', DefaultSourceDirectorySet, 'svg', project.fileResolver) } } ``` ---
**Author:** ![corbantek](https://avatars.discourse-cdn.com/v4/letter/c/3d9bf3/32.png) [@corbantek](https://discuss.gradle.org/u/corbantek)\ **Post date:** [April 28, 2016, 6:57pm UTC](https://discuss.gradle.org/t/defaultsourcedirectoryset-alternative/15193/10 "2016-04-28T18:57:20Z")
I was having this exact issue, but when I use this code snippet in either 2.12 or 2.13 I’m getting: `> No service of type SourceDirectorySetFactory available in GradleScopeServices.` Can anyone provide any help on this issue? ---
**Author:** ![TWiStErRob](https://sea1.discourse-cdn.com/gradle/user_avatar/discuss.gradle.org/twisterrob/32/7261_2.png) [@TWiStErRob](https://discuss.gradle.org/u/TWiStErRob)\ **Post date:** [October 20, 2018, 8:48am UTC](https://discuss.gradle.org/t/defaultsourcedirectoryset-alternative/15193/11 "2018-10-20T08:48:22Z")
> [@corbantek](#): > > \> No service of type SourceDirectorySetFactory available in GradleScopeServices. I found that in Gradle 4.10.2 `SourceDirectorySetFactory` is available from `project.services` (`ProjectScopeServices`), not `project.gradle.services` (`GradleScopeServices`).