fileapi: Fix codemodel target install destination for cross-dir rules

Since commit e89ad0f94e (install: Allow installing targets created in
another directory, 2018-06-18, v3.13.0-rc1~407^2) we support calling
`install(TARGETS)` for targets created in another directory.  However,
install generators are associated with the directory in which the call
to `install()` appears.  This may not be the same directory in which the
target is defined.  Record in each target the list of install generators
it has.

Fixes: #19546

4 files changed, 22 insertions, 7 deletions

diff --git a/Source/cmFileAPICodemodel.cxx b/Source/cmFileAPICodemodel.cxx
index 0fb166a..6025025 100644
--- a/Source/cmFileAPICodemodel.cxx
+++ b/Source/cmFileAPICodemodel.cxx
@@ -1025,12 +1025,9 @@ Json::Value Target::DumpInstallPrefix()
 Json::Value Target::DumpInstallDestinations()
 {
   Json::Value destinations = Json::arrayValue;
-  auto installGens = this->GT->Makefile->GetInstallGenerators();
-  for (auto iGen : installGens) {
-    auto itGen = dynamic_cast<cmInstallTargetGenerator*>(iGen);
-    if (itGen != nullptr && itGen->GetTarget() == this->GT) {
-      destinations.append(this->DumpInstallDestination(itGen));
-    }
+  auto installGens = this->GT->Target->GetInstallGenerators();
+  for (auto itGen : installGens) {
+    destinations.append(this->DumpInstallDestination(itGen));
   }
   return destinations;
 }
diff --git a/Source/cmInstallCommand.cxx b/Source/cmInstallCommand.cxx
index dba4bbb..c9e6923 100644
--- a/Source/cmInstallCommand.cxx
+++ b/Source/cmInstallCommand.cxx
@@ -43,11 +43,13 @@ static cmInstallTargetGenerator* CreateInstallTargetGenerator(
   target.SetHaveInstallRule(true);
   const char* component = namelink ? args.GetNamelinkComponent().c_str()
                                    : args.GetComponent().c_str();
-  return new cmInstallTargetGenerator(
+  auto g = new cmInstallTargetGenerator(
     target.GetName(), destination.c_str(), impLib,
     args.GetPermissions().c_str(), args.GetConfigurations(), component,
     message, args.GetExcludeFromAll(), args.GetOptional() || forceOpt,
     backtrace);
+  target.AddInstallGenerator(g);
+  return g;
 }
 
 static cmInstallTargetGenerator* CreateInstallTargetGenerator(
diff --git a/Source/cmTarget.cxx b/Source/cmTarget.cxx
index cd67586..a67122c 100644
--- a/Source/cmTarget.cxx
+++ b/Source/cmTarget.cxx
@@ -177,6 +177,7 @@ public:
   std::vector<cmCustomCommand> PreBuildCommands;
   std::vector<cmCustomCommand> PreLinkCommands;
   std::vector<cmCustomCommand> PostBuildCommands;
+  std::vector<cmInstallTargetGenerator*> InstallGenerators;
   std::set<std::string> SystemIncludeDirectories;
   cmTarget::LinkLibraryVectorType OriginalLinkLibraries;
   std::vector<std::string> IncludeDirectoriesEntries;
@@ -857,6 +858,17 @@ void cmTarget::SetHaveInstallRule(bool hir)
   impl->HaveInstallRule = hir;
 }
 
+void cmTarget::AddInstallGenerator(cmInstallTargetGenerator* g)
+{
+  impl->InstallGenerators.emplace_back(g);
+}
+
+std::vector<cmInstallTargetGenerator*> const& cmTarget::GetInstallGenerators()
+  const
+{
+  return impl->InstallGenerators;
+}
+
 bool cmTarget::GetIsGeneratorProvided() const
 {
   return impl->IsGeneratorProvided;
diff --git a/Source/cmTarget.h b/Source/cmTarget.h
index fdcca47..2bd9e6d 100644
--- a/Source/cmTarget.h
+++ b/Source/cmTarget.h
@@ -20,6 +20,7 @@
 
 class cmCustomCommand;
 class cmGlobalGenerator;
+class cmInstallTargetGenerator;
 class cmMakefile;
 class cmMessenger;
 class cmPropertyMap;
@@ -146,6 +147,9 @@ public:
   bool GetHaveInstallRule() const;
   void SetHaveInstallRule(bool hir);
 
+  void AddInstallGenerator(cmInstallTargetGenerator* g);
+  std::vector<cmInstallTargetGenerator*> const& GetInstallGenerators() const;
+
   /**
    * Get/Set whether this target was auto-created by a generator.
    */