From c3d8894722c20411d56194e7529b52644307731e Mon Sep 17 00:00:00 2001
From: Paweł Marks <pmarks@virtuslab.com>
Date: Tue, 10 Mar 2020 15:30:09 +0100
Subject: Merges documentables with the same source

---
 core/src/main/kotlin/model/Documentable.kt              |  5 +++++
 .../documentables/DefaultDocumentableMerger.kt          | 17 +++++++++++++++--
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/core/src/main/kotlin/model/Documentable.kt b/core/src/main/kotlin/model/Documentable.kt
index 8ff5969c..94bd624a 100644
--- a/core/src/main/kotlin/model/Documentable.kt
+++ b/core/src/main/kotlin/model/Documentable.kt
@@ -43,6 +43,11 @@ data class PlatformDependent<out T>(
     val prevalentValue: T?
         get() = map.values.distinct().singleOrNull()
 
+    val allValues: Sequence<T> = sequence {
+        expect?.also { yield(it) }
+        yieldAll(map.values)
+    }
+
     companion object {
         fun <T> empty(): PlatformDependent<T> = PlatformDependent(emptyMap())
         fun <T> from(platformData: PlatformData, element: T) = PlatformDependent(mapOf(platformData to element))
diff --git a/plugins/base/src/main/kotlin/transformers/documentables/DefaultDocumentableMerger.kt b/plugins/base/src/main/kotlin/transformers/documentables/DefaultDocumentableMerger.kt
index 654238a8..4d47401b 100644
--- a/plugins/base/src/main/kotlin/transformers/documentables/DefaultDocumentableMerger.kt
+++ b/plugins/base/src/main/kotlin/transformers/documentables/DefaultDocumentableMerger.kt
@@ -71,12 +71,25 @@ private fun <T> mergeExpectActual(
     }
 
     fun analyzeExpectActual(sameDriElements: List<T>): List<T> {
-        val (expect, actual) = sameDriElements.partition { it.sources.expect != null }
+        val pathGrouped: Collection<T> = mutableMapOf<Set<String>, T>().apply {
+            sameDriElements.forEach { documentable ->
+                val paths = documentable.sources.allValues.map { it.path }.toSet()
+                val key = keys.find { it.containsAll(paths) }
+                if (key == null) {
+                    put(paths, documentable)
+                } else {
+                    computeIfPresent(key) { _, old -> reducer(old, documentable) }
+                }
+            }
+        }.values
+        val (expect, actual) = pathGrouped.partition { it.sources.expect != null }
         val mergedExpect = expect.groupBy { it.sources.expect?.path }.values.map { e ->
             e.first().platformSetter(e.flatMap { it.platformData }.distinct())
         }
         val groupExpectActual = actual.groupBy { findExpect(it, mergedExpect) }
-        val pathsToExpects: Set<String> = groupExpectActual.keys.filterIsInstance<Expect.Found<T>>().mapNotNull { it.expect.sources.expect?.path }.toSet()
+        val pathsToExpects: Set<String> =
+            groupExpectActual.keys.filterIsInstance<Expect.Found<T>>()
+                .mapNotNull { it.expect.sources.expect?.path }.toSet()
 
         return groupExpectActual.flatMap { reduceExpectActual(it) } + expect.filterNot { it.sources.expect?.path in pathsToExpects }
     }
-- 
cgit