1 /*
<lambda>null2  * Copyright 2024 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package androidx.build
17 
18 import org.gradle.api.DefaultTask
19 import org.gradle.api.file.RegularFileProperty
20 import org.gradle.api.provider.Property
21 import org.gradle.api.tasks.Input
22 import org.gradle.api.tasks.Internal
23 import org.gradle.api.tasks.OutputFile
24 import org.gradle.api.tasks.TaskAction
25 import org.gradle.work.DisableCachingByDefault
26 import org.jetbrains.kotlin.gradle.dsl.KotlinVersion
27 
28 /** Check if the kotlin-stdlib transitive dependencies are the same as the project specified one. */
29 @DisableCachingByDefault(because = "not worth caching")
30 abstract class CheckKotlinApiTargetTask : DefaultTask() {
31 
32     @get:Input abstract val kotlinTarget: Property<KotlinVersion>
33 
34     @get:Internal val projectPath: String = project.path
35 
36     @get:Input
37     val allDependencies: List<Pair<String, String>> =
38         project.configurations
39             .filter { it.isPublished() && it.isCanBeResolved }
40             .flatMap { config ->
41                 config.resolvedConfiguration.firstLevelModuleDependencies.map {
42                     "${it.moduleName}:${it.moduleVersion}" to config.name
43                 }
44             }
45 
46     @get:OutputFile abstract val outputFile: RegularFileProperty
47 
48     @TaskAction
49     fun check() {
50         val incompatibleConfigurations =
51             allDependencies
52                 .asSequence()
53                 .filter { it.first.startsWith("kotlin-stdlib:") }
54                 .map { it.first.substringAfter(":") to it.second }
55                 .map { KotlinVersion.fromVersion(it.first.substringBeforeLast('.')) to it.second }
56                 .filter { it.first != kotlinTarget.get() }
57                 .map { it.second }
58                 .toList()
59 
60         val outputFile = outputFile.get().asFile
61         outputFile.parentFile.mkdirs()
62 
63         if (incompatibleConfigurations.isNotEmpty()) {
64             val errorMessage =
65                 incompatibleConfigurations.joinToString(
66                     prefix =
67                         "The project's kotlin-stdlib target is ${kotlinTarget.get()} but these " +
68                             "configurations are pulling in different versions of kotlin-stdlib: ",
69                     postfix =
70                         "\nRun ./gradlew $projectPath:dependencies to see which dependency is " +
71                             "pulling in the incompatible kotlin-stdlib"
72                 )
73             outputFile.writeText("FAILURE: $errorMessage")
74             throw IllegalStateException(errorMessage)
75         }
76     }
77 
78     companion object {
79         const val TASK_NAME = "checkKotlinApiTarget"
80     }
81 }
82