GH-2544 allow adding files to libraries without affecting classpath

This is done by adding library-like objects into the `mavenFiles`
list in version JSONs.

api/logic/minecraft/LaunchProfile.cpp

@@ -11,6 +11,7 @@ void LaunchProfile::clear()
     m_mainClass.clear();
     m_appletClass.clear();
     m_libraries.clear();
+    m_mavenFiles.clear();
     m_traits.clear();
     m_jarMods.clear();
     m_mainJar.reset();
@@ -157,6 +158,22 @@ void LaunchProfile::applyLibrary(LibraryPtr library)
     }
 }
 
+void LaunchProfile::applyMavenFile(LibraryPtr mavenFile)
+{
+    if(!mavenFile->isActive())
+    {
+        return;
+    }
+
+    if(mavenFile->isNative())
+    {
+        return;
+    }
+
+    // unlike libraries, we do not keep only one version or try to dedupe them
+    m_mavenFiles.append(Library::limitedCopy(mavenFile));
+}
+
 const LibraryPtr LaunchProfile::getMainJar() const
 {
     return m_mainJar;
@@ -253,6 +270,11 @@ const QList<LibraryPtr> & LaunchProfile::getNativeLibraries() const
     return m_nativeLibraries;
 }
 
+const QList<LibraryPtr> & LaunchProfile::getMavenFiles() const
+{
+    return m_mavenFiles;
+}
+
 void LaunchProfile::getLibraryFiles(
     const QString& architecture,
     QStringList& jars,

api/logic/minecraft/LaunchProfile.h

@@ -20,6 +20,7 @@ public: /* application of profile variables from patches */
     void applyJarMods(const QList<LibraryPtr> &jarMods);
     void applyMods(const QList<LibraryPtr> &jarMods);
     void applyLibrary(LibraryPtr library);
+    void applyMavenFile(LibraryPtr library);
     void applyMainJar(LibraryPtr jar);
     void applyProblemSeverity(ProblemSeverity severity);
     /// clear the profile
@@ -37,6 +38,7 @@ public: /* getters for profile variables */
     const QList<LibraryPtr> & getJarMods() const;
     const QList<LibraryPtr> & getLibraries() const;
     const QList<LibraryPtr> & getNativeLibraries() const;
+    const QList<LibraryPtr> & getMavenFiles() const;
     const LibraryPtr getMainJar() const;
     void getLibraryFiles(
         const QString & architecture,
@@ -79,10 +81,13 @@ private:
     /// the list of libraries
     QList<LibraryPtr> m_libraries;
 
+    /// the list of maven files to be placed in the libraries folder, but not acted upon
+    QList<LibraryPtr> m_mavenFiles;
+
     /// the main jar
     LibraryPtr m_mainJar;
 
-    /// the list of libraries
+    /// the list of native libraries
     QList<LibraryPtr> m_nativeLibraries;
 
     /// traits, collected from all the version files (version files can only add)

api/logic/minecraft/OneSixVersionFormat.cpp

@@ -144,18 +144,14 @@ VersionFilePtr OneSixVersionFormat::versionFileFromJson(const QJsonDocument &doc
         }
     }
 
-    auto readLibs = [&](const char * which)
+    auto readLibs = [&](const char * which, QList<LibraryPtr> & out)
     {
         for (auto libVal : requireArray(root.value(which)))
         {
             QJsonObject libObj = requireObject(libVal);
             // parse the library
             auto lib = libraryFromJson(libObj, filename);
-            if(lib->rawName().artifactId() == "ForgeWrapper") {
+            out.append(lib);
-                out->mainClass.clear();
-                out->addProblem(ProblemSeverity::Error, QObject::tr("Forge workarounds have no place in MultiMC."));
-            }
-            out->libraries.append(lib);
         }
     };
     bool hasPlusLibs = root.contains("+libraries");
@@ -164,16 +160,20 @@ VersionFilePtr OneSixVersionFormat::versionFileFromJson(const QJsonDocument &doc
     {
         out->addProblem(ProblemSeverity::Warning,
                         QObject::tr("Version file has both '+libraries' and 'libraries'. This is no longer supported."));
-        readLibs("libraries");
+        readLibs("libraries", out->libraries);
-        readLibs("+libraries");
+        readLibs("+libraries", out->libraries);
     }
     else if (hasLibs)
     {
-        readLibs("libraries");
+        readLibs("libraries", out->libraries);
     }
     else if(hasPlusLibs)
     {
-        readLibs("+libraries");
+        readLibs("+libraries", out->libraries);
+    }
+
+    if(root.contains("mavenFiles")) {
+        readLibs("mavenFiles", out->mavenFiles);
     }
 
     // if we have mainJar, just use it
@@ -280,6 +280,15 @@ QJsonDocument OneSixVersionFormat::versionFileToJson(const VersionFilePtr &patch
         }
         root.insert("libraries", array);
     }
+    if (!patch->mavenFiles.isEmpty())
+    {
+        QJsonArray array;
+        for (auto value: patch->mavenFiles)
+        {
+            array.append(OneSixVersionFormat::libraryToJson(value.get()));
+        }
+        root.insert("mavenFiles", array);
+    }
     if (!patch->jarMods.isEmpty())
     {
         QJsonArray array;

api/logic/minecraft/VersionFile.cpp

@@ -41,6 +41,10 @@ void VersionFile::applyTo(LaunchProfile *profile)
     {
         profile->applyLibrary(library);
     }
+    for (auto mavenFile : mavenFiles)
+    {
+        profile->applyMavenFile(mavenFile);
+    }
     profile->applyProblemSeverity(getProblemSeverity());
 }
 

api/logic/minecraft/VersionFile.h

@@ -75,6 +75,9 @@ public: /* data */
     /// Mojang: list of libraries to add to the version
     QList<LibraryPtr> libraries;
 
+    /// MultiMC: list of maven files to put in the libraries folder, but not in classpath
+    QList<LibraryPtr> mavenFiles;
+
     /// The main jar (Minecraft version library, normally)
     LibraryPtr mainJar;
 

api/logic/minecraft/update/LibrariesTask.cpp

@@ -45,6 +45,7 @@ void LibrariesTask::executeTask()
     QList<LibraryPtr> libArtifactPool;
     libArtifactPool.append(profile->getLibraries());
     libArtifactPool.append(profile->getNativeLibraries());
+    libArtifactPool.append(profile->getMavenFiles());
     libArtifactPool.append(profile->getMainJar());
     processArtifactPool(libArtifactPool, failedLocalLibraries, inst->getLocalLibraryPath());