Patch prefix path in libQt5Core

src/CMakeLists.txt

@@ -1,4 +1,4 @@
-add_executable(linuxdeploy-plugin-qt main.cpp qt-modules.h)
+add_executable(linuxdeploy-plugin-qt main.cpp qt-modules.h qt_tools_utils.hpp)
 target_link_libraries(linuxdeploy-plugin-qt linuxdeploy_core args)
 set_target_properties(linuxdeploy-plugin-qt PROPERTIES RUNTIME_OUTPUT_DIRECTORY "${PROJECT_BINARY_DIR}/bin")
 

src/qt_tools_utils.hpp

@@ -0,0 +1,119 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the tools applications of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QT_TOOLS_UTILS
+#define QT_TOOLS_UTILS
+
+#include <string>
+#include <fstream>
+
+#include <iostream>
+#include <boost/filesystem/path.hpp>
+#include <boost/filesystem/operations.hpp>
+
+#include "../lib/linuxdeploy/include/linuxdeploy/core/log.h"
+
+using namespace std;
+using namespace boost::filesystem;
+using namespace linuxdeploy::core::log;
+
+vector<char> readFileContent(const path& path, string* errorMessage);
+void writeFileContent(const path& path, const vector<char>& content, string* errorMessage);
+
+// Search for "qt_prfxpath=xxxx" in \a path, and replace it with "qt_prfxpath=."
+void patchQtCore(const path& path, string* errorMessage = nullptr)
+{
+    ldLog() << "Patching " << path.filename() << "...\n";
+
+    auto content = readFileContent(path, errorMessage);
+    if (content.empty()) {
+        *errorMessage = "Unable to patch"+path.string()+": Could not read file content";
+        return;
+    }
+
+    char prfxpath[] = "qt_prfxpath=";
+    size_t len = strlen(prfxpath);
+
+    auto startPos = std::search(content.begin(), content.end(), prfxpath, prfxpath+len);
+    if (startPos==content.end()) {
+        *errorMessage = "Unable to patch "+path.string()+": Could not locate pattern \"qt_prfxpath=\"";
+        return;
+    }
+
+    startPos += len;
+    auto endPos = startPos;
+    while (endPos!=content.end() && *endPos!='\0')
+        endPos++;
+
+    if (endPos==content.end()) {
+        *errorMessage = "Unable to patch "+path.string()+": Internal error";
+        return;
+    }
+
+    auto oldValue = vector<char>(startPos, endPos);
+    vector<char> newValue(static_cast<unsigned long>(endPos-startPos), char(0));
+    newValue[0] = '.';
+    ldLog() << "Replaced prfxpath: " << oldValue << " by " << newValue;
+
+    for (auto i = startPos; i<endPos; i++)
+        *i = newValue[i-startPos];
+
+    writeFileContent(path, content, errorMessage);
+}
+void writeFileContent(const path& path, const vector<char>& content, string* errorMessage)
+{
+    std::ofstream outfile(path.string(), std::ofstream::binary);
+    outfile.write(content.data(), content.size());
+    if (outfile.fail())
+        *errorMessage = "Unable to write : "+path.string();
+
+    outfile.close();
+}
+vector<char> readFileContent(const path& path, string* errorMessage)
+{
+    std::ifstream inFileStream(path.string(), std::ifstream::binary);
+    if (inFileStream) {
+        // get length of file:
+        inFileStream.seekg(0, std::ifstream::end);
+        auto length = static_cast<unsigned long>(inFileStream.tellg());
+        inFileStream.seekg(0, std::ifstream::beg);
+        auto* buffer = new char[length];
+
+        inFileStream.read(buffer, length);
+
+        if (inFileStream.fail())
+            *errorMessage = "Unable to read : "+path.string();
+
+        inFileStream.close();
+        vector<char> output(buffer, buffer+length);
+        delete[] buffer;
+        return output;
+    }
+}
+
+#endif QT_TOOLS_UTILS