IntelliJ IDEA unable to resolve classes of project dependency shadow jar

[Favorlock]

Shadow: 1.2.4
Gradle: 2.5

From what I understand compile project(path: ':common', configuration: 'shadow') should result in the shaded artifact being selected as a dependency. This appears to work, however, IntelliJ IDEA will not resolve the contents of the shaded artifact.

Now here is the weird thing, if I change the configuration of the project dependencies to compile, the IDE is able to resolve the classes but the compiler cannot. If I change it back to shadow the compiler can resolve the classes and the IDE cannot... o.O

root build.gradle

buildscript {
    repositories {
        mavenCentral()
        maven { url 'https://oss.sonatype.org/content/repositories/snapshots/' }
        maven { url 'https://plugins.gradle.org/m2/' }
    }
}

plugins {
    id 'nebula.provided-base' version '3.0.3'
    id 'com.github.johnrengelman.shadow' version '1.2.4'
}

subprojects {
    apply plugin: 'eclipse'
    apply plugin: 'idea'
    apply plugin: 'java'
    apply plugin: 'nebula.provided-base'
    apply plugin: 'maven'
    apply plugin: 'com.github.johnrengelman.shadow'

    idea {
        module {
            scopes.PROVIDED.plus += [configurations.shadow]
        }
    }

    tasks.withType(AbstractCompile) {
        classpath += configurations.shadow
    }

    ext {
        junit = '4.12'
        lombok = '1.16.8'
        guava = '19.0'
        gson = '2.3.1'
        log4j = '2.0-beta9'
        jsonrpc2 = '1.15'
        json_smart = '1.3.1'
        reflections = '0.9.10'
        javassist = '3.12.1.GA'
        zip4j = '1.3.2'
    }

    repositories {
        mavenLocal()
        mavenCentral()
        maven { url 'https://oss.sonatype.org/content/repositories/snapshots/' }
        maven { url 'https://oss.sonatype.org/content/repositories/releases/' }
    }

    dependencies {
        testCompile group: 'junit', name: 'junit', version: junit
        provided group: 'net.minidev', name: 'json-smart', version: json_smart
        provided group: 'org.projectlombok', name: 'lombok', version: lombok
        provided group: 'com.google.guava', name: 'guava', version: guava
        provided group: 'org.apache.logging.log4j', name: 'log4j-core', version: log4j
        provided group: 'com.google.code.gson', name: 'gson', version: gson
        provided group: 'net.lingala.zip4j', name: 'zip4j', version: zip4j
    }

    shadowJar {
        relocate 'com.google.gson', 'com.enjin.shaded.gson'
        relocate 'net.minidev.json', 'com.enjin.shaded.json'
    }
}

subproject core build.gradle

sourceCompatibility = 1.7

dependencies {
    compile group: 'com.google.code.gson', name: 'gson', version: gson
}

shadowJar {
    dependencies {
        include(dependency('.*:json-smart'))
        include(dependency('.*:gson'))
    }
}

subproject rpcapi build.gradle

sourceCompatibility = 1.7

dependencies {
    compile project(path: ':core', configuration: 'shadow')
    compile group: 'com.thetransactioncompany', name: 'jsonrpc2-client', version: jsonrpc2
}

shadowJar {
    dependencies {
        include(project(':core'))
        include(dependency('com.thetransactioncompany:.*'))
    }
}

And so on...

[Favorlock]

Any ideas as to why I would experience this issue @johnrengelman ?

[Kraeutergarten]

Same Issue here.
Using Intellij 2016.3 and gradle 2.14.1

[Favorlock]

Only workaround I found was to add all transitive project dependencies as a shadow dependency in every single build file. So 'rpcapi' has 'core', 'common' has 'rpcapi' and 'core', and so on. Not really an ideal solution, but it'll do the job until this issue is resolved.

[johnrengelman]

Does someone have a simple project on github that exhibits the problem?

[Favorlock]

Unfortunately not as this issue is part of a large project I work on for the company I'm contracted with. I can work on making an example project that replicates the issue, but I can't get to that immediately.

[janschaefer]

For an example, you can look at https://github.com/TNG/JGiven, where the same problem exists. Neither using ./gradlew idea nor importing the project as a gradle project into IntelliJ works.

[janschaefer]

There is also an open defect for IntelliJ regarding this issue: https://youtrack.jetbrains.com/issue/IDEA-163411

[RobLewis]

Why is this causing compile errors in one file in my fairly large Android Studio project? See the issue referenced by @dariuszeweryn above.
When I update my rxandroidble-parent project in Android Studio to v. 1.10.2, I get these "cannot resolve symbol" errors in the file RxBleGattCallback.java: bleshadow (lines 26 & 27), Inject (line 59), and Named (line 60).

Everything else compiles OK.

[hafarooki]

Is there any workaround for this?