spring-framework/gradle/ide.gradle

import org.gradle.plugins.ide.eclipse.model.ProjectDependency
import org.gradle.plugins.ide.eclipse.model.SourceFolder

apply plugin: 'eclipse'

eclipse.jdt {
	sourceCompatibility = 17
	targetCompatibility = 17
}

// Replace classpath entries with project dependencies (GRADLE-1116)
// https://issues.gradle.org/browse/GRADLE-1116
eclipse.classpath.file.whenMerged { classpath ->
	def regexp = /.*?\/([^\/]+)\/build\/([^\/]+\/)+(?:main|test)/ // only match those that end in main or test (avoids removing necessary entries like build/classes/jaxb)
	def projectOutputDependencies = classpath.entries.findAll { entry -> entry.path =~ regexp }
	projectOutputDependencies.each { entry ->
		def matcher = (entry.path =~ regexp)
		if (matcher) {
			def projectName = matcher[0][1]
			def path = "/${projectName}"
			if (!classpath.entries.find { e -> e instanceof ProjectDependency && e.path == path }) {
				def recursiveDependency = entry.path.matches('.+/' + projectName + '/build/([^/]+/)+(?:main|test)')
				// Avoid recursive dependency on current project.
				if (!recursiveDependency) {
					classpath.entries.add(new ProjectDependency(path))
				}
			}
			classpath.entries.remove(entry)
		}
	}

	// Remove any remaining direct depencencies on JARs in the build/libs folder
	// except the repack JARs.
	classpath.entries.removeAll { entry -> (entry.path =~ /(?!.*?repack.*\.jar).*?\/([^\/]+)\/build\/libs\/[^\/]+\.jar/) }
}

// Use separate main/test outputs (prevents WTP from packaging test classes)
eclipse.classpath.defaultOutputDir = file(project.name + '/bin/eclipse')
eclipse.classpath.file.beforeMerged { classpath ->
	classpath.entries.findAll{ it instanceof SourceFolder }.each {
		if (it.output.startsWith('bin/')) {
			it.output = null
		}
	}
}
eclipse.classpath.file.whenMerged {
	entries.findAll{ it instanceof SourceFolder }.each {
		it.output = 'bin/' + it.path.split('/')[1]
	}
}

// Ensure project dependencies come after 3rd-party libs (SPR-11836)
// https://jira.spring.io/browse/SPR-11836
eclipse.classpath.file.whenMerged {
	entries.findAll { it instanceof ProjectDependency }.each {
		// delete from original position
		entries.remove(it)
		// append to end of classpath
		entries.add(it)
	}
}

// Ensure that JMH sources and resources are treated as test classpath entries
// so that they can see test fixtures.
// https://github.com/melix/jmh-gradle-plugin/issues/157
eclipse.classpath.file.whenMerged {
	entries.findAll { it.path =~ /src\/jmh\/(java|kotlin|resources)/ }.each {
		it.entryAttributes['test'] = 'true'
	}
}

// Include project specific settings
task eclipseSettings(type: Copy) {
	from rootProject.files(
		'src/eclipse/org.eclipse.core.resources.prefs',
		'src/eclipse/org.eclipse.jdt.core.prefs',
		'src/eclipse/org.eclipse.jdt.ui.prefs')
	into project.file('.settings/')
	outputs.upToDateWhen { false }
}

task cleanEclipseSettings(type: Delete) {
	delete project.file('.settings/org.eclipse.core.resources.prefs')
	delete project.file('.settings/org.eclipse.jdt.core.prefs')
	delete project.file('.settings/org.eclipse.jdt.ui.prefs')
}

tasks['eclipse'].dependsOn(eclipseSettings)
tasks['eclipseJdt'].dependsOn(eclipseSettings)
tasks['cleanEclipse'].dependsOn(cleanEclipseSettings)