[vcs]: advertise VCS integration plugins if the project uses it (IJPL-201700)

GitOrigin-RevId: 50c937a607749715dbc841db02bee2c77b9ada0d

platform/vcs-api/vcs-api-core/resources/messages/VcsBundle.properties

@@ -1306,5 +1306,5 @@ diff.title.revision.tooltip=[{0}] {1}<br/><br/>by {2} on {3}
 
 action.Vcs.Commit.CloseDialog.text=Close Commit Dialog
 group.ChangesView.ViewOptions.text=View Options
-
 more.via.plugins.link=More via plugins\u2026
+plugins.configurable.suggested.vcs.features=This plugin is suggested because your project uses {0} Version Control

platform/vcs-impl/resources/META-INF/VcsExtensions.xml

@@ -38,6 +38,7 @@
     <!-- preload only for performance reasons -->
     <projectService serviceInterface="com.intellij.openapi.vcs.ProjectLevelVcsManager"
                     serviceImplementation="com.intellij.openapi.vcs.impl.ProjectLevelVcsManagerImpl" preload="notHeadless"/>
+    <dependencyCollector kind="vcs" implementation="com.intellij.openapi.vcs.impl.MissingVcsPluginAdvertiser"/>
     <!--suppress LightServiceMigrationXML - see DefaultProjectStoreTest (IDE needs to know correct Storage without service being loaded) -->
     <projectService serviceImplementation="com.intellij.openapi.vcs.impl.OptionsAndConfirmationsHolder"/>
     <projectService serviceInterface="com.intellij.vcs.console.VcsConsoleTabService"

platform/vcs-impl/src/com/intellij/openapi/vcs/impl/MissingVcsPluginAdvertiser.kt

@@ -0,0 +1,26 @@
+// Copyright 2000-2026 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
+package com.intellij.openapi.vcs.impl
+
+import com.intellij.ide.plugins.DependencyCollector
+import com.intellij.ide.plugins.DependencyInformation
+import com.intellij.openapi.project.Project
+import com.intellij.openapi.vcs.ProjectLevelVcsManager
+import com.intellij.openapi.vcs.VcsBundle
+import com.intellij.openapi.vcs.impl.projectlevelman.AllVcses
+
+/**
+ * Advertises VCS plugins that were unbundled, but the project uses them.
+ */
+internal class MissingVcsPluginAdvertiser : DependencyCollector {
+  override suspend fun collectDependencies(project: Project): Collection<DependencyInformation> {
+    return ProjectLevelVcsManager.getInstance(project)
+      .getDirectoryMappings()
+      .asSequence()
+      .filter { AllVcses.getInstance(project).getByName(it.vcs) == null }
+      .map {
+        val vcsName = it.vcs
+        DependencyInformation(vcsName.lowercase(),
+                              VcsBundle.message("plugins.configurable.suggested.vcs.features", vcsName))
+      }.toList()
+  }
+}

plugins/git4idea/resources/intellij.vcs.git.xml

@@ -573,6 +573,8 @@
   </actions>
 
   <extensions defaultExtensionNs="com.intellij">
+    <dependencySupport kind="vcs" coordinate="vcs:git" displayName="Git"/>
+
     <advancedSetting id="git.clone.recurse.submodules" default="true" groupKey="advanced.settings.git"/>
     <advancedSetting id="git.read.content.with" enumClass="git4idea.util.GitTextConvMode" default="FILTERS"
                      groupKey="advanced.settings.git"/>

plugins/hg4idea/resources/META-INF/plugin.xml

@@ -17,6 +17,8 @@
   <depends>com.intellij.modules.vcs</depends>
 
   <extensions defaultExtensionNs="com.intellij">
+    <dependencySupport kind="vcs" coordinate="hg4idea" displayName="Mercurial"/>
+
     <search.projectOptionsTopHitProvider implementation="org.zmlx.hg4idea.HgOptionsTopHitProvider"/>
     <vcs name="hg4idea" vcsClass="org.zmlx.hg4idea.HgVcs" displayName="Mercurial" administrativeAreaName=".hg"/>
     <projectConfigurable id="vcs.Mercurial" key="hg4idea.mercurial" instance="org.zmlx.hg4idea.HgProjectConfigurable"

plugins/svn4idea/resources/META-INF/plugin.xml

@@ -128,6 +128,8 @@
   </extensionPoints>
 
   <extensions defaultExtensionNs="com.intellij">
+    <dependencySupport kind="vcs" coordinate="svn" displayName="Subversion"/>
+
     <registryKey key="svn.use.incoming.optimization" defaultValue="false"
                  description="Use remotely (in svn repository) changed files list to optimize incoming revisions processing"/>
     <registryKey key="svn.lowest.supported.format.for.command.line" defaultValue="1.7.0"