Meson: List files from extra_files target field in project tree

Fixes: QTCREATORBUG-24824
Change-Id: Id37bdaea08fb527398195ac16f99fe3c00d36566
Reviewed-by: hjk <hjk@qt.io>
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/mesonprojectmanager/mesoninfoparser/parsers/targetparser.h

@@ -66,6 +66,7 @@ class TargetParser
                  targetObj["id"].toString(),
                  targetObj["defined_in"].toString(),
                  targetObj["filename"].toVariant().toStringList(),
+                 targetObj["extra_files"].toVariant().toStringList(),
                  targetObj["subproject"].toString(),
                  extract_sources(targetObj["target_sources"].toArray())};
         return t;

src/plugins/mesonprojectmanager/mesoninfoparser/target.h

@@ -75,6 +75,7 @@ struct Target
     const QString id;
     const QString definedIn;
     const QStringList fileName;
+    const QStringList extraFiles;
     const Utils::optional<QString> subproject;
     const SourceGroupList sources;
 
@@ -114,6 +115,7 @@ struct Target
            QString &&id,
            QString &&definedIn,
            QStringList &&fileName,
+           QStringList &&extraFiles,
            QString &&subproject,
            SourceGroupList &&sources)
         : type{toType(type)}
@@ -121,6 +123,7 @@ struct Target
         , id{std::move(id)}
         , definedIn{QDir::cleanPath(definedIn)}
         , fileName{cleanPath(std::move(fileName))}
+        , extraFiles{cleanPath(std::move(extraFiles))}
         , subproject{subproject.isNull() ? Utils::nullopt
                                          : Utils::optional<QString>{std::move(subproject)}}
         , sources{std::move(sources)}

src/plugins/mesonprojectmanager/project/projecttree/projecttree.cpp

@@ -38,6 +38,11 @@ void buildTargetTree(std::unique_ptr<MesonProjectNode> &root, const Target &targ
                                                             ProjectExplorer::FileType::Source));
         }
     }
+    for (const auto &extraFile : target.extraFiles) {
+        root->addNestedNode(
+            std::make_unique<ProjectExplorer::FileNode>(Utils::FilePath::fromString(extraFile),
+                                                        ProjectExplorer::FileType::Unknown));
+    }
 }
 
 void addTargetNode(std::unique_ptr<MesonProjectNode> &root, const Target &target)