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UpdateAgpVersions.kt
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UpdateAgpVersions.kt
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/*
* Copyright 2020 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.gradle.gradlebuild
import org.gradle.api.DefaultTask
import org.gradle.api.file.RegularFileProperty
import org.gradle.api.provider.Property
import org.gradle.api.tasks.Internal
import org.gradle.api.tasks.TaskAction
import org.gradle.build.ReproduciblePropertiesWriter
import org.w3c.dom.Element
import java.util.Properties
import javax.xml.parsers.DocumentBuilderFactory
/**
* Fetch the latest AGP versions and write a properties file.
* Never up-to-date, non-cacheable.
*/
abstract class UpdateAgpVersions : DefaultTask() {
@get:Internal
abstract val comment: Property<String>
@get:Internal
abstract val minimumSupportedMinor: Property<String>
@get:Internal
abstract val propertiesFile: RegularFileProperty
@TaskAction
fun fetch() {
val dbf = DocumentBuilderFactory.newInstance()
val latests = dbf.fetchLatests(minimumSupportedMinor.get())
val nightly = dbf.fetchNightly()
val properties = Properties().apply {
setProperty("latests", latests.joinToString(","))
setProperty("nightly", nightly)
}
ReproduciblePropertiesWriter.store(
properties,
propertiesFile.get().asFile,
comment.get()
)
}
private
fun DocumentBuilderFactory.fetchLatests(minimumSupported: String): List<String> {
var latests = fetchVersionsFromMavenMetadata("https://dl.google.com/dl/android/maven2/com/android/tools/build/gradle/maven-metadata.xml")
.groupBy { it.take(3) }
.map { (_, versions) -> versions.first() }
latests = (latests + minimumSupported).sorted()
latests = latests.subList(latests.indexOf(minimumSupported) + 1, latests.size)
return latests
}
private
fun DocumentBuilderFactory.fetchNightly(): String =
fetchVersionsFromMavenMetadata("https://repo.gradle.org/gradle/ext-snapshots-local/com/android/tools/build/gradle/maven-metadata.xml")
.first()
private
fun DocumentBuilderFactory.fetchVersionsFromMavenMetadata(url: String): List<String> =
newDocumentBuilder()
.parse(url)
.getElementsByTagName("version").let { versions ->
(0 until versions.length)
.map { idx -> (versions.item(idx) as Element).textContent }
.reversed()
}
}