== Share logic in `buildSrc`

`buildSrc` is a Gradle-recognized and protected directory which comes with some benefits:

1. *Reusable Build Logic*:
+
`buildSrc` allows you to organize and centralize your custom build logic, tasks, and plugins in a structured manner.
The code written in buildSrc can be reused across your project, making it easier to maintain and share common build functionality.

2. *Isolation from the Main Build*:
+

class ConfigurationCacheIncludedBuildLogicIntegrationTest extends AbstractConfigurationCacheIntegrationTest {
    TestFile pluginSourceFile

    def setup() {
        settingsFile << "includeBuild('build-logic')"
        def rootDir = file("build-logic")
        rootDir.file("settings.gradle") << """
            rootProject.name="lib"
        """
        rootDir.file("build.gradle") << """
            plugins {

include("root-build")

// Shared information about external modules
include("dependency-modules")

// Special purpose build logic for root project - please preserve alphabetical order
include("cleanup")
include("idea")
include("lifecycle")

// Special purpose build logic for subproject - please preserve alphabetical order
include("binary-compatibility")
include("build-init-samples")
include("buildquality")

    when using Istio on VMs. This configuration was hardcoded into the iptables logic, meaning there was no way to
    capture traffic on port 22.

    The iptables logic now no longer has special logic on port 22. Instead, the `istioctl x workload entry configure`

Let's take the previous example.
The logic in `buildSrc` has been turned into a project that contains plugins and can be published and worked on independently of the root project build.

The plugin is moved to its own build called `build-logic` with a build script and settings file:

}

includeBuild("../build-logic-settings")

// Shared basics for all
include("basics")

// Platform: defines shared dependency versions
include("build-platform")

// Compute the identity/version we are building and related details (like current git commit)
include("module-identity")

// Code quality rules common to :build-logic and the root build
include("code-quality-rules")

No sub-projects
"""
    }

    def "project project structure and software types for multi-project build using declarative dcl"() {
        given: "a build-logic build registering an ecosystem plugin defining several software types via several plugins"
        file("build-logic/src/main/java/com/example/restricted/LibraryExtension.java") << """
            package com.example.restricted;

            import org.gradle.api.provider.Property;

plugins {
    id("gradlebuild.build-logic.kotlin-dsl-gradle-plugin")
    id("gradlebuild.build-logic.groovy-dsl-gradle-plugin")
}

description = "Provides plugins that create update tasks for the Gradle build"

dependencies {
    implementation("gradlebuild:basics")
    implementation("com.google.code.gson:gson")
    implementation("org.jsoup:jsoup")

            filePermissions { unix("0755") }
        }
        from(repoRoot()) {
            listOf(
                "build-logic-commons", "build-logic-commons/*",
                "build-logic", "build-logic/*",
                "build-logic-settings", "build-logic-settings/*",
                "subprojects/*", "platforms/*/*"
            ).forEach {
                include("$it/*.gradle")

    }
}
// tag::config-logic[]
dependencies {
    implementation("log4j:log4j:1.2.17")
}

tasks.register("printArtifactNames") {
    // always executed
    val libraryNames = configurations.compileClasspath.get().map { it.name }

    doLast {
        logger.quiet(libraryNames.joinToString())
    }
}