lucene/gradle/generate-defaults.gradle

74 lines
2.9 KiB
Groovy

// This script tries to guess sensible defaults for gradle parallelism
// and local machine's resources and save them under 'gradle.properties'.
def hasDefaults = rootProject.file("gradle.properties").exists()
// If we don't have the defaults yet, create them and re-run the build
// recursively with the same parameters as originally passed.
//
// Sadly, the recursive build doesn't seem to pick up the parallelism
// tweaks from gradle.properties file.
if (!hasDefaults) {
configure(rootProject) {
task setupLocalDefaultsOnce(type: GradleBuild) {
// Approximate a common-sense default for running gradle with parallel
// workers: half the count of available cpus but not more than 12.
def cpus = Runtime.runtime.availableProcessors()
def maxWorkers = (int) Math.max(1d, Math.min(cpus * 0.5d, 12))
def testsJvms = (int) Math.max(1d, Math.min(cpus * 0.5d, 4))
// Reuse the same set of parameters for the recursive invocation and apply
// some of these eagerly.
def startParams = gradle.startParameter.newInstance()
startParams.setParallelProjectExecutionEnabled(true)
startParams.setMaxWorkerCount(maxWorkers)
startParameter(startParams)
// Write the defaults for this machine.
rootProject.file("gradle.properties").write(
[
"# These settings have been generated automatically on the first run.",
"# See gradlew :helpLocalSettings for more information.",
"systemProp.file.encoding=UTF-8",
"org.gradle.daemon=true",
"org.gradle.jvmargs=-Xmx1g",
"org.gradle.parallel=true",
"org.gradle.priority=normal",
"org.gradle.warning.mode=none", // Silence gradle warnings. We'll deal with them when we upgrade the wrapper.
"",
"# Maximum number of parallel gradle workers.",
"org.gradle.workers.max=${maxWorkers}",
"",
"# Maximum number of test JVMs forked per test task.",
"tests.jvms=${testsJvms}"
].join("\n"), "UTF-8")
doFirst {
logger.log(LogLevel.WARN, "\nIMPORTANT. This is the first time you ran the build. " +
"I wrote some sane defaults (for this machine) to 'gradle.properties', " +
"they will be picked up on consecutive gradle invocations (not this one).\n\n" +
"Run gradlew :helpLocalSettings for more information.")
}
}
}
// Disable any tasks in this build, they were forked recursively.
gradle.taskGraph.whenReady { graph ->
graph.allTasks.each { task ->
if (task != rootProject.setupLocalDefaultsOnce) {
task.enabled = false
}
}
}
// Make all tasks depend on local setup to make sure it'll run.
allprojects {
tasks.all { task ->
if (task != rootProject.setupLocalDefaultsOnce) {
task.dependsOn rootProject.setupLocalDefaultsOnce
}
}
}
}