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n

nuhkoca

06/22/2019, 5:11 PM
Hi all, with
Groovy
we had a chance to create
common.gradle
script in order to avoid boilerplate and use it within other mutual gradle files. However, I am unable to do have the same behaviour with DSL. Anyone know how to do that?
l

louiscad

06/22/2019, 5:13 PM
You mean Kotlin DSL? I put shared logic in buildSrc/kotlin/main
That implies moving
buildscript
classpath
dependencies to buildSrc as
implementation
.
n

nuhkoca

06/22/2019, 5:15 PM
@louiscad Yes I do. If you mean managing dependencies and versions I already do that, I mean applying configs from another gradle file like
apply from : "$rootDir/common.gradle.kts"
This seems not to work in Kotlin DSL
l

louiscad

06/22/2019, 5:17 PM
I'm doing the same for configs. You can also make light plugins in buildSrc, or apply groovy base gradle scripts. Applying gradle kts scripts doesn't work well (not sure if it's even supported).
n

nuhkoca

06/22/2019, 5:22 PM
I see, thanks for informing! Any useful link for how to make a plugin in buildSrc?
I believe writing a plain
something.gradle.kts
file like you would write a
build.gradle.kts
file produces an implicit plugin named
something
that you can apply using the
plugins
DSL, or the
apply
function. You can try and tell if it works
n

nuhkoca

06/22/2019, 7:11 PM
Thanks! I already got my hands dirty. Wrote a
.kts
file inside
src/main/kotlin
and added it to my child
.kts
However, I am getting below error;
The 'java' plugin has been applied, but it is not compatible with the Android plugins.
Actually I know the reason but I don’t understand why things don’t work like in Groovy. This is my plugin - common-library.gradle.kts
plugins {
    `java-library`
}

val javaVersion: JavaVersion by extra { JavaVersion.VERSION_1_8 }

java {
    sourceCompatibility = javaVersion
    targetCompatibility = javaVersion
}

dependencies {}
And this is the child
plugins {
    `common-library`
    id(Plugins.androidApplication)
    kotlin(Plugins.kotlinAndroid)
    kotlin(Plugins.kotlinAndroidExtension)
    kotlin(Plugins.kotlinKapt)
}
l

louiscad

06/22/2019, 8:46 PM
java-library
applies the
java
plugin, that's why. You need to stop applying
common-library
for android modules
n

nuhkoca

06/23/2019, 12:09 AM
So this means that there is no accurate way to overcome?
g

gildor

06/23/2019, 4:05 PM
Just apply android plugin
Also, instead of applying a plugin, just add it to dependencies of your buildSrc and configure required part (but you don't have static accessors in this case)
One more approach is to define function in buildSrc which configures something and call it from your plugin
Also gradle.kts scripts (not plugins) also work same way as Groovy, but problem that it's very not easy to use them, because every config inside uses dynemaic types and sometimes you just don't have access to required classes, but it still possible to use them to configure project itself or built-in plugins, but not third party plugins, because you don't have access to classpath of plugin
e

efemoney

06/27/2019, 3:00 AM
@gildor unless you add those third party plugins as dependencies of the entire build via
dependencies { ... }
in
buildSrc/build.gradle(.kts)
. Then the classes are available in your buildscript classpath and you can use them in any
build.gradle(.kts)
. Its still going to be dynamic however so not entirely convenient
g

gildor

06/27/2019, 3:03 AM
@efemoney Yes, correct, I mentioned it above. Essentially buildSrc is the only way to have static types for some additional shared logic in Gradle
Its still going to be dynamic however so not entirely convenient
precompiled script plugins solve this problem
1