IJPL-166435 IJent: change log level of the server-side app in runtime

(cherry picked from commit 582b8d52d52c4776188f1fc22fe896d9fb40c9e4)

IJ-CR-148991

GitOrigin-RevId: 762baeed11b0785d735943d22a8e662a7a33ce50

platform/ijent/src/com/intellij/platform/ijent/IjentProcessUtil.kt

@@ -3,9 +3,7 @@
 
 package com.intellij.platform.ijent
 
-import com.intellij.openapi.application.ApplicationManager
 import com.intellij.openapi.diagnostic.Logger
-import com.intellij.openapi.util.registry.Registry
 import com.intellij.util.containers.map2Array
 
 /**
@@ -17,23 +15,12 @@ fun getIjentGrpcArgv(
   selfDeleteOnExit: Boolean = false,
   usrBinEnv: String = "/usr/bin/env",
 ): List<String> {
-  val debuggingLogLevel = when {
-    LOG.isTraceEnabled &&
-    (ApplicationManager.getApplication()?.isUnitTestMode == true || System.getProperty("ijent.trace.all") == "true") ->
-      "trace-all"
-
-    LOG.isTraceEnabled -> "trace"
-    LOG.isDebugEnabled -> "debug"
-    else -> "info"
-  }
-
   return listOfNotNull(
     usrBinEnv,
     *additionalEnv.entries.map2Array { (k, v) -> "$k=$v" },
     // "gdbserver", "0.0.0.0:12345",  // https://sourceware.org/gdb/onlinedocs/gdb/Connecting.html
     remotePathToIjent,
     "grpc-stdio-server",
-    "--log-level", debuggingLogLevel,
     if (selfDeleteOnExit) "--self-delete-on-exit" else null,
   )
 }

platform/platform-impl/src/com/intellij/diagnostic/logs/LogLevelConfigurationManager.kt

@@ -3,7 +3,9 @@ package com.intellij.diagnostic.logs
 
 import com.intellij.openapi.components.*
 import com.intellij.openapi.diagnostic.logger
+import com.intellij.openapi.extensions.ExtensionPointName
 import kotlinx.serialization.Serializable
+import org.jetbrains.annotations.ApiStatus.Internal
 import java.util.logging.Level
 
 /**
@@ -28,6 +30,20 @@ class LogLevelConfigurationManager : SerializablePersistentStateComponent<LogLev
     fun getInstance(): LogLevelConfigurationManager = service()
   }
 
+  @Internal
+  interface Listener {
+    /**
+     * Instead of sending changes diff,
+     * it is supposed that implementations look at [com.intellij.openapi.diagnostic.Logger.isDebugEnabled] themselves.
+     */
+    fun onCategoriesChanged()
+
+    companion object {
+      @JvmField
+      val EP_NAME: ExtensionPointName<Listener> = ExtensionPointName.create("com.intellij.logLevelConfigurationListener")
+    }
+  }
+
   private val customizedLoggers = mutableListOf<java.util.logging.Logger>()
   private val lock = Object()
 
@@ -41,6 +57,7 @@ class LogLevelConfigurationManager : SerializablePersistentStateComponent<LogLev
     updateState {
       it.copy(categories = appliedCategories)
     }
+    Listener.EP_NAME.forEachExtensionSafe { it.onCategoriesChanged() }
   }
 
   private fun String.toTrimmed(): String = trimStart('#')

platform/platform-resources/src/META-INF/PlatformExtensionPoints.xml

@@ -600,5 +600,6 @@
                     interface="com.intellij.auth.GenericAuthProviderExtension" dynamic="true"/>
     <extensionPoint name="findInDirectoryScopeProvider" interface="com.intellij.find.impl.FindInDirectoryScopeProvider" dynamic="true"/>
 
+    <extensionPoint name="logLevelConfigurationListener" interface="com.intellij.diagnostic.logs.LogLevelConfigurationManager$Listener" dynamic="true"/>
   </extensionPoints>
 </idea-plugin>