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%")

            "-PtestJavaVendor=$testJvmVendor"
        ) +
            listOf(buildScanTag(buildScanTag)) +
            buildScanValues.map { buildScanCustomValue(it.key, it.value) }
        ).filter { it.isNotBlank() }.joinToString(separator = " ")
}

fun functionalTestParameters(os: Os): List<String> {
    return listOf(
        "-PteamCityBuildId=%teamcity.build.id%",

# To simplify the automations section, some calculations are placed under unique YAML keys defined here.
# Read the "|" not as "or", but as a "pipe", taking the output of the previous command and passing it to the next command.
# This section could also appear ahead of the automations section.

colors:
  yellow: 'ffb300'

includes_src_changes: {{ files | match(regex=r/.*\/src\//) | some }}

        File baselineJarsDirectory = artifact.get().asFile
        if (baselineJarsDirectory.name == 'gradle-jars') {
            baselineJarsDirectory.listFiles().each {
                outputs.file(it)
            }
        }
    }

          approvals: 2

# To simplify the automations section, some calculations are placed under unique YAML keys defined here.
# Read the "|" not as "or", but as a "pipe", taking the output of the previous command and passing it to the next command.
# This section could also appear ahead of the automations section.

    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 =