From 29ca865bc607aa0b195255e161b86d6d417fa3cd Mon Sep 17 00:00:00 2001
From: Vladimir Koshelev <vladimir.koshelev@jetbrains.com>
Date: Mon, 26 Aug 2024 17:42:50 +0200
Subject: [PATCH] [pycharm] enable appcds for PyCharm PY-75476

GitOrigin-RevId: d20fd55316fb6049f5f1effe6e47248aa5a46555
---
 .../intellij/build/ProductProperties.kt       | 11 ++++++++++
 .../intellij/build/impl/BuildContextImpl.kt   | 21 +++++++++++++++++--
 2 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/platform/build-scripts/src/org/jetbrains/intellij/build/ProductProperties.kt b/platform/build-scripts/src/org/jetbrains/intellij/build/ProductProperties.kt
index 3200f4eb3cf0..28bff57eb271 100644
--- a/platform/build-scripts/src/org/jetbrains/intellij/build/ProductProperties.kt
+++ b/platform/build-scripts/src/org/jetbrains/intellij/build/ProductProperties.kt
@@ -104,6 +104,17 @@ abstract class ProductProperties {
    */
   var classLoader: String? = "com.intellij.util.lang.PathClassLoader"
 
+
+  /**
+   * If `true`, the Class Data Sharing (CDS) feature will be enabled for the JVM and system.class.loader will be disabled.
+   *
+   * When enabled, the JVM will generate a shared archive file for the application's classes on the first startup,
+   * which can be reused in further launches.
+   *
+   * The location of the cds file is $SYSTEM/$shortProductName$Version.jsa
+   */
+  var enableCds: Boolean = false
+
   /**
    * Additional arguments which will be added to JVM command line in IDE launchers for all operating systems.
    */
diff --git a/platform/build-scripts/src/org/jetbrains/intellij/build/impl/BuildContextImpl.kt b/platform/build-scripts/src/org/jetbrains/intellij/build/impl/BuildContextImpl.kt
index d35696d86a4d..14f3f58e4075 100644
--- a/platform/build-scripts/src/org/jetbrains/intellij/build/impl/BuildContextImpl.kt
+++ b/platform/build-scripts/src/org/jetbrains/intellij/build/impl/BuildContextImpl.kt
@@ -298,8 +298,25 @@ class BuildContextImpl internal constructor(
   override fun getAdditionalJvmArguments(os: OsFamily, arch: JvmArchitecture, isScript: Boolean, isPortableDist: Boolean): List<String> {
     val jvmArgs = ArrayList<String>()
 
-    productProperties.classLoader?.let {
-      jvmArgs.add("-Djava.system.class.loader=${it}")
+    val cacheMacroName = when (os) {
+      OsFamily.WINDOWS -> "%IDE_CACHE_DIR%"
+      OsFamily.MACOS -> "\$IDE_CACHE_DIR"
+      OsFamily.LINUX -> "\$IDE_CACHE_DIR"
+    }
+
+    if (!productProperties.enableCds) {
+      productProperties.classLoader?.let {
+        jvmArgs.add("-Djava.system.class.loader=${it}")
+      }
+    }
+    else {
+      if (os == OsFamily.WINDOWS) {
+        jvmArgs.add("-XX:SharedArchiveFile=$cacheMacroName\\${productProperties.baseFileName}$buildNumber.jsa")
+      }
+      else {
+        jvmArgs.add("-XX:SharedArchiveFile=$cacheMacroName/${productProperties.baseFileName}$buildNumber.jsa")
+      }
+      jvmArgs.add("-XX:+AutoCreateSharedArchive")
     }
 
     jvmArgs.add("-Didea.vendor.name=${applicationInfo.shortCompanyName}")