How do I get IntelliJ to recognize gradle generated sources dir?

Question

So I have an XJC javaExec that spins like a top but IntelliJ doesn\'t recognize the generated output despite having marked generated-src/java as such. Do I need to

Answer 1

in 2020 you probably did not refresh the project in IDEA

because it actually works oob.

30 mins of reading outdated solutions :(

Answer 2

In my case, it didn't work unless I added the generate sources directory to both sourceDirs and generatedSourceDirs:

def generatedSourcesDir = file('src/generated/main/java')
idea {
  module {
    sourceDirs += generatedSourcesDir
    generatedSourceDirs += generatedSourcesDir
  }
}

Answer 3

The code of this answer, rewritten using Kotlin DSL, will look like this:

plugins {
    idea
}

val generatedSourcesPath = file("out/production/classes/generated")

java.sourceSets["main"].java.srcDir(generatedSourcesPath)

idea {
    module {
        generatedSourceDirs.add(generatedSourcesPath)
    }
}

Answer 4

ext {
    // path to IDEA generated sources directory
    ideaGeneratedSourcesDir = "$projectDir/src/main/generated"
}
compileJava {
    //……
    options.annotationProcessorGeneratedSourcesDirectory = file(ideaGeneratedSourcesDir)
    //options.headerOutputDirectory.set(file(ideaGeneratedSourcesDir)) (tested no effect)
    //……
}
// above work for me, and i try all method this question mentioned it's not work! env: idea2019.3, wrapped gradle6.3-all, zh-CN, JDK8, [x] annotation processing is disabled(no effect, in global settings ), no idea plugin([x]plugins {id idea}), [x]sourceSets no need to set(genereated srcDir)

myCodeGenExample:

task vertxCodeGen(type: JavaCompile) {
    group 'build'
    source = sourceSets.main.java
    destinationDir = file(ideaGeneratedSourcesDir)
    classpath = configurations.compileClasspath
    options.annotationProcessorPath = configurations.annotationProcessor
    options.debugOptions.debugLevel = "source,lines,vars"
    options.compilerArgs = [
            "-proc:only",
            "-processor", "io.vertx.codegen.CodeGenProcessor",
            // where the non Java classes / non resources are stored (mandatory) - the processors requires this option to know where to place them
            "-Acodegen.output=$destinationDir.absolutePath",
    ]
}

refresh the gradle, continously exist

Answer 5

I'll point out a solution by Daniel Dekany, from a Gradle discussion thread actually linking to this question. To quote:

apply plugin: "idea"
...
sourceSets.main.java.srcDir new File(buildDir, 'generated/javacc')
idea {
    module {
        // Marks the already(!) added srcDir as "generated"
        generatedSourceDirs += file('build/generated/javacc')
    }
}

Works well for me.