While a lot of Gradle source code runs only in the Gradle daemon, not all of it does and so, when working on some source code it is important to be aware of the runtimes in which it will run.

See [Gradle runtimes](runtimes.md) for a list of these runtimes and more details.

## Build state model

As Gradle executes, it acts on various pieces of the build definition, such as each project in the build.

            pAnn.flatten().any { isNullableCtAnnotation(it) }
        }
    }

    private static boolean hasNullableAnnotation(CtField field) {
        return NULLABLE_ANNOTATIONS.any { field.hasAnnotation(it) }
    }

    private static boolean hasNullableAnnotation(CtMethod method) {
        return NULLABLE_ANNOTATIONS.any { method.hasAnnotation(it) }
    }

                parameters.monitoredTaskPaths = allTasks.filter(taskFilter).map { if (isInBuildLogic) ":build-logic${it.path}" else it.path }.toSet()
            }
            gradle.serviceOf<BuildEventsListenerRegistry>().onTaskCompletion(buildService)

    params {
        param("credentialsStorageType", "credentialsJSON")
        // Disallow Web UI changes to TeamCity settings
        param("teamcity.ui.settings.readOnly", "true")
        // Avoid rebuilding same revision if it's already built on another branch
        param("teamcity.vcsTrigger.runBuildOnSameRevisionInEveryBranch", "false")
        param("env.DEVELOCITY_ACCESS_KEY", "%ge.gradle.org.access.key%;%ge-td-dogfooding.grdev.net.access.key%")

    val parameters = (
        buildToolGradleParameters(daemon, maxParallelForks = maxParallelForks) +
            listOf(extraParameters) +
            buildScanTags.map { buildScanTag(it) } +
            functionalTestParameters(os)
        ).joinToString(separator = " ")

    steps {
        gradleWrapper(this@gradleRunnerStep) {
            name = stepName

        assertEquals("clean myTask", getGradleStep("GRADLE_RUNNER").tasks)
    }

    private
    fun getGradleStep(stepName: String) = steps.items.find { it.name == stepName }!! as GradleBuildStep

    private
    fun expectedRunnerParam(daemon: String = "--daemon", extraParameters: String = "", os: Os = Os.LINUX): String {
        val linuxPaths =

A session runs the build one or more times.
For example, when continuous build is enabled, the session may run the build many times, but when it is disabled, the session will run the build once only.

The build session state is managed by the `BuildSessionState` class.
An instance is created at the start of a Gradle invocation and discarded at the end of that invocation.

            JvmVendor.openjdk.name,
            display = ParameterDisplay.PROMPT,
            description = "Java vendor to run the test with",
            options = JvmVendor.values().map { it.displayName to it.name }
        )
        text(
            testTaskOptionsParameterName,
            "",
            display = ParameterDisplay.PROMPT,
            allowEmpty = true,

    val configurationCacheReport = "org.gradle.buildtool.internal:configuration-cache-report:$configurationCacheReportVersion"
    val eclipseSisuPlexus = "org.eclipse.sisu:org.eclipse.sisu.plexus"
    val fastutil = "it.unimi.dsi:fastutil"
    val gcs = "com.google.apis:google-api-services-storage"
    val googleApiClient = "com.google.api-client:google-api-client"
    val googleHttpClient = "com.google.http-client:google-http-client"

        member.annotations*.fullyQualifiedName.any { it == Incubating.name }
    }

    private static boolean isAnnotatedWithDeprecated(JApiHasAnnotations member) {
        member.annotations*.fullyQualifiedName.any { it == Deprecated.name || it == kotlin.Deprecated.name }
    }

    private static boolean isAnnotatedWithInject(JApiHasAnnotations member) {
        member.annotations*.fullyQualifiedName.any { it == Inject.name }
    }