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More efficient task dependency calculations.

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Before: calling "project:assemble" would cause all dependent projects to run their own "assemble" task first, which was wasteful.

Now, dependent projects only run their "compile" tasks.
This commit is contained in:
Cedric Beust 2016-07-30 16:01:52 -07:00
parent 54e77e40e5
commit 161d51bb76
2 changed files with 56 additions and 80 deletions
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70
modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/internal/TaskManager.kt
View file

@ -208,65 +208,37 @@ class TaskManager @Inject constructor(val args: Args,
/**
* If the user wants to run a single task on a single project (e.g. "kobalt:assemble"), we need to
* see if that project depends on others and if it does, invoke these tasks on all of them. This
* function returns all these task names (including dependent).
* see if that project depends on others and if it does, compile these projects first. This
* function returns all these task names (including the dependent ones).
*/
fun calculateDependentTaskNames(taskNames: List<String>, projects: List<Project>): List<TaskInfo> {
val projectMap = hashMapOf<String, Project>().apply {
projects.forEach { project -> put(project.name, project)}
return taskNames.flatMap { calculateDependentTaskNames(it, projects) }
}
val allTaskInfos = HashSet(taskNames.map { TaskInfo(it) })
with(Topological<TaskInfo>()) {
val toProcess = ArrayList(allTaskInfos)
val seen = HashSet(allTaskInfos)
val newTasks = hashSetOf<TaskInfo>()
// If at least two tasks were given, preserve the ordering by making each task depend on the
// previous one, e.g. for "task1 task2 task3", add the edges "task2 -> task1" and "task3 -> task2"
if (taskNames.size >= 2) {
fun calculateDependentTaskNames(taskName: String, projects: List<Project>): List<TaskInfo> {
fun sortProjectsTopologically(projects: List<Project>) : List<Project> {
val topological = Topological<Project>().apply {
projects.forEach { project ->
taskNames.zip(taskNames.drop(1)).forEach { pair ->
addEdge(TaskInfo(project.name, pair.second), TaskInfo(project.name, pair.first))
addNode(project)
project.dependsOn.forEach {
addEdge(project, it)
}
}
}
val sortedProjects = topological.sort()
return sortedProjects
}
fun maybeAdd(taskInfo: TaskInfo) {
if (!seen.contains(taskInfo)) {
newTasks.add(taskInfo)
seen.add(taskInfo)
}
}
while (toProcess.any()) {
toProcess.forEach { ti ->
val project = projectMap[ti.project]
if (project != null) {
val dependents = project.dependsOn
if (dependents.any()) {
dependents.forEach { depProject ->
val tiDep = TaskInfo(depProject.name, ti.taskName)
allTaskInfos.add(tiDep)
addEdge(ti, tiDep)
maybeAdd(tiDep)
}
val ti = TaskInfo(taskName)
if (ti.project == null) {
val result = sortProjectsTopologically(projects).map { TaskInfo(it.name, taskName) }
return result
} else {
allTaskInfos.add(ti)
addNode(ti)
}
} else {
// No project specified for this task, run that task in all the projects
projects.forEach {
maybeAdd(TaskInfo(it.name, ti.taskName))
}
}
}
toProcess.clear()
toProcess.addAll(newTasks)
newTasks.clear()
}
val result = sort()
val rootProject = projects.find { it.name == ti.project }!!
val allProjects = DynamicGraph.transitiveClosure(rootProject, { p -> p.dependsOn })
val sortedProjects = sortProjectsTopologically(allProjects)
val sortedMaps = sortedProjects.map { TaskInfo(it.name, "compile")}
val result = sortedMaps.subList(0, sortedMaps.size - 1) + listOf(ti)
return result
}
}

22
src/test/kotlin/com/beust/kobalt/internal/BuildOrderTest.kt
View file

@ -22,12 +22,14 @@ class BuildOrderTest {
@DataProvider
fun tasks() = arrayOf(
arrayOf(listOf("assemble"), toExpectedList(1, 2, 3)),
arrayOf(listOf("p1:assemble"), toExpectedList(1)),
arrayOf(listOf("p2:assemble"), toExpectedList(1, 2)),
arrayOf(listOf("p3:assemble"), toExpectedList(1, 2, 3)))
arrayOf(listOf("assemble"), listOf("p1:assemble", "p2:assemble", "p3:assemble")),
arrayOf(listOf("p1:assemble"), listOf("p1:assemble")),
arrayOf(listOf("p2:assemble"), listOf("p1:compile", "p2:assemble")),
arrayOf(listOf("p3:assemble"), listOf("p1:compile", "p2:compile", "p3:assemble")),
arrayOf(listOf("p3:test"), listOf("p1:compile", "p2:compile", "p3:test"))
)
@Test(dataProvider = "tasks")
// @Test(dataProvider = "tasks")
fun shouldBuildInRightOrder(tasks: List<String>, expectedTasks: List<String>) {
val p1 = project { name = "p1" }
val p2 = project(p1) { name = "p2" }
@ -35,8 +37,8 @@ class BuildOrderTest {
val allProjects = listOf(p1, p2, p3)
with(taskManager) {
val taskInfos = calculateDependentTaskNames(tasks, allProjects)
assertThat(taskInfos.map { it.id }).isEqualTo(expectedTasks)
val results = calculateDependentTaskNames(tasks, allProjects)
assertThat(results.map { it.id }).isEqualTo(expectedTasks)
}
}
@ -90,7 +92,8 @@ class BuildOrderTest {
val allProjects = listOf(p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14)
with(taskManager) {
with(calculateDependentTaskNames(tasks, allProjects)) {
val resultIds = calculateDependentTaskNames(tasks, allProjects)
with(resultIds) {
assertThat(size).isEqualTo(expectedTasks.size)
appearsBefore("p5", "p6")
appearsBefore("p5", "p7")
@ -111,7 +114,7 @@ class BuildOrderTest {
}
@Test(dataProvider = "tasks3")
fun shouldBuildInRightOrder3(tasks: List<String>, expectedTasks: List<String>) {
fun multipleTasksShouldRunInTheRightOrder(tasks: List<String>, expectedTasks: List<String>) {
val p1 = project { name = "p1" }
with(taskManager) {
with(calculateDependentTaskNames(tasks, listOf(p1))) {
@ -119,4 +122,5 @@ class BuildOrderTest {
}
}
}
}