Get the accumulated duration of specific tasks from a Develocity Build Scan, using its REST API

acc-duration-by-task-path.main.kts

#!/usr/bin/env kotlin

@file:DependsOn("com.gabrielfeo:develocity-api-kotlin:2024.3.0")

import com.gabrielfeo.develocity.api.*
import kotlinx.coroutines.runBlocking


val buildScanId = requireNotNull(args.getOrNull(0)) { "Expected arg 0: build scan ID" }
val taskPaths = System.`in`.bufferedReader().lineSequence()
    .map { it.trim() }
    .filterTo(LinkedHashSet()) { it.isNotEmpty() }
    .also {
        require(it.isNotEmpty()) { "Expected task paths in stdin" }
    }

val api = DevelocityApi.newInstance()

val perf = runBlocking {
    api.buildsApi.getGradleBuildCachePerformance(id = buildScanId)
}
val tasks = perf.taskExecution.asSequence().filter { it.taskPath in taskPaths }
val totalExecution = tasks.sumOf { it.duration }
println("Tasks' total duration (serial): $totalExecution ms")
val totalTaskActionExecution = tasks.sumOf { it.duration - (it.fingerprintingDuration ?: 0) }
println("Tasks' total 'task action' execution duration (serial): $totalTaskActionExecution ms")

api.shutdown()