GH-967 make libraries handle their own path prefix

Makes it possible to mix libraries managed by FTB and MultiMC
Backport from unstable

logic/forge/ForgeInstaller.cpp

@@ -87,8 +87,8 @@ void ForgeInstaller::prepare(const QString &filename, const QString &universalUr
 	// where do we put the library? decode the mojang path
 	OneSixLibrary lib(libraryName);
 
-	auto cacheentry = ENV.metacache()->resolveEntry("libraries", lib.storagePath());
-	finalPath = "libraries/" + lib.storagePath();
+	auto cacheentry = ENV.metacache()->resolveEntry("libraries", lib.storageSuffix());
+	finalPath = "libraries/" + lib.storageSuffix();
 	if (!ensureFilePathExists(finalPath))
 		return;
 

logic/ftb/FTBProfileStrategy.cpp

@@ -41,6 +41,7 @@ void FTBProfileStrategy::loadDefaultBuiltinPatches()
 	}
 	profile->appendPatch(minecraftPatch);
 
+	auto nativeInstance = dynamic_cast<OneSixFTBInstance *>(m_instance);
 	ProfilePatchPtr packPatch;
 	{
 		auto mcJson = m_instance->minecraftRoot() + "/pack.json";
@@ -58,6 +59,7 @@ void FTBProfileStrategy::loadDefaultBuiltinPatches()
 			{
 				addLib->m_hint = "local";
 				addLib->insertType = RawLibrary::Prepend;
+				addLib->setStoragePrefix(nativeInstance->librariesPath().absolutePath());
 			}
 			file->fileId = "org.multimc.ftb.pack";
 			file->setVanilla(true);

logic/ftb/OneSixFTBInstance.cpp

@@ -78,7 +78,7 @@ void OneSixFTBInstance::copy(const QDir &newDir)
 		for (auto library : libraryNames)
 		{
 			OneSixLibrary *lib = new OneSixLibrary(library);
-			const QString out = QDir::current().absoluteFilePath("libraries/" + lib->storagePath());
+			const QString out = QDir::current().absoluteFilePath("libraries/" + lib->storageSuffix());
 			if (QFile::exists(out))
 			{
 				continue;
@@ -87,7 +87,7 @@ void OneSixFTBInstance::copy(const QDir &newDir)
 			{
 				qCritical() << "Couldn't create folder structure for" << out;
 			}
-			if (!QFile::copy(librariesPath().absoluteFilePath(lib->storagePath()), out))
+			if (!QFile::copy(librariesPath().absoluteFilePath(lib->storageSuffix()), out))
 			{
 				qCritical() << "Couldn't copy" << lib->rawName();
 			}

logic/minecraft/OneSixInstance.cpp

@@ -139,7 +139,7 @@ BaseProcess *OneSixInstance::prepareForLaunch(AuthSessionPtr session)
 		auto libs = m_version->getActiveNormalLibs();
 		for (auto lib : libs)
 		{
-			launchScript += "cp " + librariesPath().absoluteFilePath(lib->storagePath()) + "\n";
+			launchScript += "cp " + QFileInfo(lib->storagePath()).absoluteFilePath() + "\n";
 		}
 		auto jarMods = getJarMods();
 		if (!jarMods.isEmpty())
@@ -191,7 +191,7 @@ BaseProcess *OneSixInstance::prepareForLaunch(AuthSessionPtr session)
 		QDir natives_dir(PathCombine(instanceRoot(), "natives/"));
 		for (auto native : m_version->getActiveNativeLibs())
 		{
-			QFileInfo finfo(PathCombine("libraries", native->storagePath()));
+			QFileInfo finfo(native->storagePath());
 			launchScript += "ext " + finfo.absoluteFilePath() + "\n";
 		}
 		launchScript += "natives " + natives_dir.absolutePath() + "\n";

logic/minecraft/OneSixLibrary.cpp

@@ -29,6 +29,7 @@ OneSixLibrary::OneSixLibrary(RawLibraryPtr base)
 	m_native_classifiers = base->m_native_classifiers;
 	m_rules = base->m_rules;
 	dependType = base->dependType;
+	m_storagePrefix = base->m_storagePrefix;
 	// these only make sense for raw libraries. OneSix
 	/*
 	insertType = base->insertType;

logic/minecraft/OneSixUpdate.cpp

@@ -227,8 +227,8 @@ void OneSixUpdate::jarlibStart()
 			continue;
 		}
 
-		QString raw_storage = lib->storagePath();
-		QString raw_dl = lib->downloadUrl();
+		QString raw_storage = lib->storageSuffix();
+		QString raw_dl = lib->url().toString();
 
 		auto f = [&](QString storage, QString dl)
 		{

logic/minecraft/RawLibrary.cpp

@@ -2,6 +2,7 @@
 using namespace MMCJson;
 
 #include "RawLibrary.h"
+#include <pathutils.h>
 
 RawLibraryPtr RawLibrary::fromJson(const QJsonObject &libObj, const QString &filename)
 {
@@ -29,7 +30,9 @@ RawLibraryPtr RawLibrary::fromJson(const QJsonObject &libObj, const QString &fil
 		return true;
 	};
 
-	readString("url", out->m_base_url);
+	QString urlStr;
+	readString("url", urlStr);
+	out->m_base_url = urlStr;
 	readString("MMC-hint", out->m_hint);
 	readString("MMC-absulute_url", out->m_absolute_url);
 	readString("MMC-absoluteUrl", out->m_absolute_url);
@@ -109,7 +112,7 @@ RawLibraryPtr RawLibrary::fromJsonPlus(const QJsonObject &libObj, const QString
 				throw JSONValidationError("Empty compound insert rule in " + filename);
 			}
 			QString insertString = insertObj.keys().first();
-			// really, only replace makes sense in combination with 
+			// really, only replace makes sense in combination with
 			if(insertString != "replace")
 			{
 				throw JSONValidationError("Compound insert rule is not 'replace' in " + filename);
@@ -154,7 +157,7 @@ QJsonObject RawLibrary::toJson() const
 		m_base_url != "https://" + URLConstants::AWS_DOWNLOAD_LIBRARIES &&
 		m_base_url != "https://" + URLConstants::LIBRARY_BASE && !m_base_url.isEmpty())
 	{
-		libRoot.insert("url", m_base_url);
+		libRoot.insert("url", m_base_url.toString());
 	}
 	if (isNative())
 	{
@@ -194,7 +197,7 @@ QJsonObject RawLibrary::toJson() const
 QStringList RawLibrary::files() const
 {
 	QStringList retval;
-	QString storage = storagePath();
+	QString storage = storageSuffix();
 	if (storage.contains("${arch}"))
 	{
 		QString cooked_storage = storage;
@@ -221,17 +224,19 @@ bool RawLibrary::filesExist(const QDir &base) const
 	}
 	return true;
 }
-QString RawLibrary::downloadUrl() const
+QUrl RawLibrary::url() const
 {
-	if (m_absolute_url.size())
+	if (!m_absolute_url.isEmpty())
+	{
 		return m_absolute_url;
+	}
 
 	if (m_base_url.isEmpty())
 	{
-		return QString("https://" + URLConstants::LIBRARY_BASE) + storagePath();
+		return QString("https://" + URLConstants::LIBRARY_BASE) + storageSuffix();
 	}
 
-	return m_base_url + storagePath();
+	return m_base_url.resolved(storageSuffix());
 }
 
 bool RawLibrary::isActive() const
@@ -259,7 +264,26 @@ bool RawLibrary::isActive() const
 	return result;
 }
 
-QString RawLibrary::storagePath() const
+void RawLibrary::setStoragePrefix(QString prefix)
+{
+	m_storagePrefix = prefix;
+}
+
+QString RawLibrary::defaultStoragePrefix()
+{
+	return "libraries/";
+}
+
+QString RawLibrary::storagePrefix() const
+{
+	if(m_storagePrefix.isEmpty())
+	{
+		return defaultStoragePrefix();
+	}
+	return m_storagePrefix;
+}
+
+QString RawLibrary::storageSuffix() const
 {
 	// non-native? use only the gradle specifier
 	if (!isNative())
@@ -269,7 +293,7 @@ QString RawLibrary::storagePath() const
 
 	// otherwise native, override classifiers. Mojang HACK!
 	GradleSpecifier nativeSpec = m_name;
-	if(m_native_classifiers.contains(currentSystem))
+	if (m_native_classifiers.contains(currentSystem))
 	{
 		nativeSpec.setClassifier(m_native_classifiers[currentSystem]);
 	}
@@ -279,3 +303,13 @@ QString RawLibrary::storagePath() const
 	}
 	return nativeSpec.toPath();
 }
+
+QString RawLibrary::storagePath() const
+{
+	return PathCombine(storagePrefix(), storageSuffix());
+}
+
+bool RawLibrary::storagePathIsDefault() const
+{
+	return m_storagePrefix.isEmpty();
+}

logic/minecraft/RawLibrary.h

@@ -5,6 +5,7 @@
 #include <QStringList>
 #include <QMap>
 #include <QDir>
+#include <QUrl>
 #include <memory>
 
 #include "minecraft/OneSixRule.h"
@@ -33,7 +34,7 @@ public: /* methods */
 	{
 		return m_name;
 	}
-	
+
 	void setRawName(const GradleSpecifier & spec)
 	{
 		m_name = spec;
@@ -43,7 +44,7 @@ public: /* methods */
 	{
 		m_name.setClassifier(spec);
 	}
-	
+
 	/// returns the full group and artifact prefix
 	QString artifactPrefix() const
 	{
@@ -68,8 +69,24 @@ public: /* methods */
 		return m_native_classifiers.size() != 0;
 	}
 
+	void setStoragePrefix(QString prefix = QString());
+
+	/// the default storage prefix used by MultiMC
+	static QString defaultStoragePrefix();
+
+	bool storagePathIsDefault() const;
+
+	/// Get the prefix - root of the storage to be used
+	QString storagePrefix() const;
+
+	/// Get the relative path where the library should be saved
+	QString storageSuffix() const;
+
+	/// Get the absolute path where the library should be saved
+	QString storagePath() const;
+
 	/// Set the url base for downloads
-	void setBaseUrl(const QString &base_url)
+	void setBaseUrl(const QUrl &base_url)
 	{
 		m_base_url = base_url;
 	}
@@ -110,11 +127,7 @@ public: /* methods */
 	bool isActive() const;
 
 	/// Get the URL to download the library from
-	QString downloadUrl() const;
-
-	/// Get the relative path where the library should be saved
-	QString storagePath() const;
-
+	QUrl url() const;
 
 protected: /* data */
 	/// the basic gradle dependency specifier.
@@ -128,7 +141,7 @@ protected: /* data */
 public: /* data */
 	// TODO: make all of these protected, clean up semantics of implicit vs. explicit values.
 	/// URL where the file can be downloaded
-	QString m_base_url;
+	QUrl m_base_url;
 
 	/// DEPRECATED: absolute URL. takes precedence the normal download URL, if defined
 	QString m_absolute_url;
@@ -136,6 +149,9 @@ public: /* data */
 	/// type hint - modifies how the library is treated
 	QString m_hint;
 
+	/// storage - by default the local libraries folder in multimc, but could be elsewhere
+	QString m_storagePrefix;
+
 	/// true if the library had an extract/excludes section (even empty)
 	bool applyExcludes = false;
 
@@ -160,7 +176,7 @@ public: /* data */
 		Replace
 	} insertType = Append;
 	QString insertData;
-	
+
 	/// determines how can libraries be applied. conflicting dependencies cause errors.
 	enum DependType
 	{

logic/minecraft/VersionFile.cpp

@@ -369,7 +369,7 @@ void VersionFile::applyTo(MinecraftProfile *version)
 			if (index >= 0)
 			{
 				auto existingLibrary = version->libraries[index];
-				if (!addedLibrary->m_base_url.isNull())
+				if (!addedLibrary->m_base_url.isEmpty())
 				{
 					existingLibrary->setBaseUrl(addedLibrary->m_base_url);
 				}