dagger.gradle

// Manages classpath and IDE annotation processing config for dagger.
// 
// setup:
//     Add the following to your root build.gradle
//     
//     apply plugin: 'idea'
//     subprojects {
//         apply from: rootProject.file('dagger.gradle')
//     }
// 
//     do not use gradle integration of the ide.  instead generate and import like so:
//
//     ./gradlew clean cleanEclipse cleanIdea eclipse idea
//
// known limitations:
//     as output folders include generated classes, you may need to run clean a few times.
//     incompatible with android plugin as it applies the java plugin
//     unnecessarily applies both eclipse and idea plugins even if you don't use them
//     suffers from the normal non-IDE eclipse integration where nested projects don't import properly.
//       change your structure to flattened to avoid this.
//
// deprecated by: https://github.com/Netflix/gradle-template/issues/8
//
// original design: cfieber
apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'idea'

if (!project.hasProperty('daggerVersion')) {
    ext {
        daggerVersion = "1.2.2"
    }    
}

configurations {
    daggerCompiler {
        visible false
    }
}

configurations.all {
    resolutionStrategy {
        eachDependency { DependencyResolveDetails details ->
            if (details.requested.group == 'com.squareup.dagger') {
                details.useVersion daggerVersion
            }
        }
    }
}

def annotationGeneratedSources = file('.generated/src')
def annotationGeneratedTestSources = file('.generated/test')

task prepareAnnotationGeneratedSourceDirs(overwrite: true) << {
    annotationGeneratedSources.mkdirs()
    annotationGeneratedTestSources.mkdirs()
    sourceSets*.java.srcDirs*.each { it.mkdirs() }
    sourceSets*.resources.srcDirs*.each { it.mkdirs() }
}

sourceSets {
    main {
        java {
            compileClasspath += configurations.daggerCompiler
        }
    }
    test {
        java {
            compileClasspath += configurations.daggerCompiler
        }
    }
}

dependencies {
    compile "com.squareup.dagger:dagger:${project.daggerVersion}"
    daggerCompiler "com.squareup.dagger:dagger-compiler:${project.daggerVersion}"
}

rootProject.idea.project.ipr.withXml { projectXml ->
    projectXml.asNode().component.find { it.@name == 'CompilerConfiguration' }.annotationProcessing[0].replaceNode {
        annotationProcessing {
            profile(default: true, name: 'Default', enabled: true) {
                sourceOutputDir name: relativePath(annotationGeneratedSources)
                sourceTestOutputDir name: relativePath(annotationGeneratedTestSources)
                outputRelativeToContentRoot value: true
                processorPath useClasspath: true
            }
        }
    }
}

tasks.ideaModule.dependsOn(prepareAnnotationGeneratedSourceDirs)

idea.module {
    scopes.PROVIDED.plus += [project.configurations.daggerCompiler]
    iml.withXml { xml->
        def moduleSource = xml.asNode().component.find { it.@name = 'NewModuleRootManager' }.content[0]
        moduleSource.appendNode('sourceFolder', [url: "file://\$MODULE_DIR\$/${relativePath(annotationGeneratedSources)}", isTestSource: false])
        moduleSource.appendNode('sourceFolder', [url: "file://\$MODULE_DIR\$/${relativePath(annotationGeneratedTestSources)}", isTestSource: true])
    }
}

tasks.eclipseClasspath.dependsOn(prepareAnnotationGeneratedSourceDirs)

eclipse.classpath {
    plusConfigurations += [project.configurations.daggerCompiler]
}

tasks.eclipseClasspath {
    doLast {
        eclipse.classpath.file.withXml {
            it.asNode().children()[0] + {
                classpathentry(kind: 'src', path: relativePath(annotationGeneratedSources)) {
                    attributes {
                        attribute name: 'optional', value: true
                    }
                }
            }
        }
    }
}

// http://forums.gradle.org/gradle/topics/eclipse_generated_files_should_be_put_in_the_same_place_as_the_gradle_generated_files
Map pathMappings = [:];  
SourceSetContainer sourceSets = project.sourceSets;  
sourceSets.each { SourceSet sourceSet ->  
    String relativeJavaOutputDirectory = project.relativePath(sourceSet.output.classesDir);  
    String relativeResourceOutputDirectory = project.relativePath(sourceSet.output.resourcesDir);  
    sourceSet.java.getSrcDirTrees().each { DirectoryTree sourceDirectory ->  
        String relativeSrcPath = project.relativePath(sourceDirectory.dir.absolutePath);

        pathMappings[relativeSrcPath] = relativeJavaOutputDirectory;  
    }  
    sourceSet.resources.getSrcDirTrees().each { DirectoryTree resourceDirectory ->  
        String relativeResourcePath = project.relativePath(resourceDirectory.dir.absolutePath);

        pathMappings[relativeResourcePath] = relativeResourceOutputDirectory;  
    }  
}

project.eclipse.classpath.file {  
    whenMerged { classpath ->  
        classpath.entries.findAll { entry ->
            return entry.kind == 'src';  
        }.each { entry ->  
            if(pathMappings.containsKey(entry.path)) {  
                entry.output = pathMappings[entry.path];  
            }  
        }  
    }  
}

eclipse.jdt.file.withProperties { props ->
    props.setProperty('org.eclipse.jdt.core.compiler.processAnnotations', 'enabled')
}

tasks.eclipseJdt {
    doFirst {
        def aptPrefs = file('.settings/org.eclipse.jdt.apt.core.prefs')
        aptPrefs.parentFile.mkdirs()

        aptPrefs.text = """\
            eclipse.preferences.version=1
            org.eclipse.jdt.apt.aptEnabled=true
            org.eclipse.jdt.apt.genSrcDir=${relativePath(annotationGeneratedSources)}
            org.eclipse.jdt.apt.reconcileEnabled=true
            """.stripIndent()

        file('.factorypath').withWriter {
            new groovy.xml.MarkupBuilder(it).'factorypath' {
                project.configurations.daggerCompiler.files.each { dep ->
                    'factorypathentry' kind: 'EXTJAR', id: dep.absolutePath, enabled: true, runInBatchMode: false
                }
            }
        }
    }
}