add directories with sources to list of project roots

if the pro file for the translations lives in a sibling tree of the
actual source tree, messages from included headers wouldn't have been
collected, as they were not considered part of the project.

Task-number: QTBUG-7495
(cherry picked from commit f300f5cfdf3b32e687191b071c30e14ac2721fc8)

6 files changed, 132 insertions, 3 deletions

diff --git a/tests/auto/linguist/lupdate/testdata/good/from_subdir/lupdatecmd b/tests/auto/linguist/lupdate/testdata/good/from_subdir/lupdatecmd
new file mode 100644
index 0000000..8a5b4ad
--- /dev/null
+++ b/tests/auto/linguist/lupdate/testdata/good/from_subdir/lupdatecmd
@@ -0,0 +1 @@
+lupdate translations/translations.pro
diff --git a/tests/auto/linguist/lupdate/testdata/good/from_subdir/project.ts.result b/tests/auto/linguist/lupdate/testdata/good/from_subdir/project.ts.result
new file mode 100644
index 0000000..7167cf3
--- /dev/null
+++ b/tests/auto/linguist/lupdate/testdata/good/from_subdir/project.ts.result
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE TS>
+<TS version="2.0">
+<context>
+    <name>QApplication</name>
+    <message>
+        <location filename="src/main.cpp" line="49"/>
+        <source>string in main.cpp</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="src/main.h" line="45"/>
+        <source>string in main.h</source>
+        <translation type="unfinished"></translation>
+    </message>
+</context>
+</TS>
diff --git a/tests/auto/linguist/lupdate/testdata/good/from_subdir/src/main.cpp b/tests/auto/linguist/lupdate/testdata/good/from_subdir/src/main.cpp
new file mode 100644
index 0000000..1a24ab2
--- /dev/null
+++ b/tests/auto/linguist/lupdate/testdata/good/from_subdir/src/main.cpp
@@ -0,0 +1,50 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+// IMPORTANT!!!! If you want to add testdata to this file,
+// always add it to the end in order to not change the linenumbers of translations!!!
+
+#include "main.h"
+
+int main(char **argv, int argc)
+{
+     return QApplication::tr("string in main.cpp");
+}
diff --git a/tests/auto/linguist/lupdate/testdata/good/from_subdir/src/main.h b/tests/auto/linguist/lupdate/testdata/good/from_subdir/src/main.h
new file mode 100644
index 0000000..cc07d7c
--- /dev/null
+++ b/tests/auto/linguist/lupdate/testdata/good/from_subdir/src/main.h
@@ -0,0 +1,45 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+// IMPORTANT!!!! If you want to add testdata to this file,
+// always add it to the end in order to not change the linenumbers of translations!!!
+
+QT_TRANSLATE_NOOP("QApplication", "string in main.h")
diff --git a/tests/auto/linguist/lupdate/testdata/good/from_subdir/translations/translations.pro b/tests/auto/linguist/lupdate/testdata/good/from_subdir/translations/translations.pro
new file mode 100644
index 0000000..1815c37
--- /dev/null
+++ b/tests/auto/linguist/lupdate/testdata/good/from_subdir/translations/translations.pro
@@ -0,0 +1,7 @@
+VPATH = ../src
+INCLUDEPATH = ../src
+
+SOURCES += main.cpp
+HEADERS += main.h
+
+TRANSLATIONS += ../project.ts
diff --git a/tools/linguist/lupdate/main.cpp b/tools/linguist/lupdate/main.cpp
index fd9c696..a50c97a 100644
--- a/tools/linguist/lupdate/main.cpp
+++ b/tools/linguist/lupdate/main.cpp
@@ -317,9 +317,18 @@ static void processProject(
         cd.m_codecForSource = codecForSource;
         cd.m_includePath = visitor.values(QLatin1String("INCLUDEPATH"));
         QStringList sourceFiles = getSources(visitor, pfi.absolutePath());
-        QSet<QString> projectRoots;
-        projectRoots.insert(QDir::cleanPath(pfi.absolutePath()) + QLatin1Char('/'));
-        cd.m_projectRoots = projectRoots;
+        QSet<QString> sourceDirs;
+        sourceDirs.insert(QDir::cleanPath(pfi.absolutePath()) + QLatin1Char('/'));
+        foreach (const QString &sf, sourceFiles)
+            sourceDirs.insert(sf.left(sf.lastIndexOf(QLatin1Char('/')) + 1));
+        QStringList rootList = sourceDirs.toList();
+        rootList.sort();
+        for (int prev = 0, curr = 1; curr < rootList.length(); )
+            if (rootList.at(curr).startsWith(rootList.at(prev)))
+                rootList.removeAt(curr);
+            else
+                prev = curr++;
+        cd.m_projectRoots = QSet<QString>::fromList(rootList);
         processSources(*fetchedTor, sourceFiles, cd);
     }
 }