Implement source sections compiler plugin

allows to compile only parts of the source files, denoted by top-level "sections" (function with lambda param calls), but preserving original file line/column numbers for easier diagnostics. Allow e.g. to compile gradle "buildscript" section without preprocessing original file in advance. See tests for examples.
2017-03-10 16:15:11 +01:00
parent 63c276d444
commit 4b430b49a7
17 changed files with 708 additions and 4 deletions
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2010-2017 JetBrains s.r.o.
+ *
+ * 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.jetbrains.kotlin.extensions
+
+import com.intellij.openapi.project.Project
+import com.intellij.openapi.vfs.VirtualFile
+import com.intellij.testFramework.LightVirtualFile
+import org.jetbrains.kotlin.utils.addToStdlib.firstNotNullResult
+
+/**
+ * The interface for the extensions that are used to substitute VirtualFile on the creation of KtFile, allows to preprocess a file before
+ * lexing and parsing
+ */
+interface PreprocessedVirtualFileFactoryExtension {
+    companion object : ProjectExtensionDescriptor<PreprocessedVirtualFileFactoryExtension>(
+            "org.jetbrains.kotlin.preprocessedVirtualFileFactoryExtension",
+            PreprocessedVirtualFileFactoryExtension::class.java
+    )
+    fun isPassThrough(): Boolean
+
+    fun createPreprocessedFile(file: VirtualFile?): VirtualFile?
+    fun createPreprocessedLightFile(file: LightVirtualFile?): LightVirtualFile?
+}
+
+class PreprocessedFileCreator(val project: Project) {
+
+    private val validExts: Array<PreprocessedVirtualFileFactoryExtension> by lazy {
+        PreprocessedVirtualFileFactoryExtension.getInstances(project).filterNot { it.isPassThrough() }.toTypedArray()
+    }
+
+    fun create(file: VirtualFile): VirtualFile = validExts.firstNotNullResult { it.createPreprocessedFile(file) } ?: file
+
+    // unused now, but could be used in the IDE at some point
+    fun createLight(file: LightVirtualFile): LightVirtualFile = validExts.firstNotNullResult { it.createPreprocessedLightFile(file) } ?: file
+}
+