Prevent adding empty file paths as dependencies

The input artifact scanner was missing a check, so empty paths could end
up in the list of file dependencies. As a result, the respective
artifact would get rebuilt every time.

Change-Id: I34e48776856224dc885f03d34d40cae88d7d5e4b
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>

5 files changed, 22 insertions, 3 deletions

diff --git a/src/lib/corelib/buildgraph/inputartifactscanner.cpp b/src/lib/corelib/buildgraph/inputartifactscanner.cpp
index 644b95d79..d183b1879 100644
--- a/src/lib/corelib/buildgraph/inputartifactscanner.cpp
+++ b/src/lib/corelib/buildgraph/inputartifactscanner.cpp
@@ -255,6 +255,8 @@ void InputArtifactScanner::resolveScanResultDependencies(const Artifact *inputAr
 
         if (FileInfo::isAbsolute(dependencyFilePath)) {
             resolveDepencency(dependency, inputArtifact->product.get(), &resolvedDependency);
+            if (resolvedDependency.filePath.isEmpty())
+                goto unresolved;
             goto resolved;
         }
 
diff --git a/tests/auto/blackbox/testdata-qt/qrc/bla.cpp b/tests/auto/blackbox/testdata-qt/qrc/bla.cpp
index e04f873a6..5375b33b6 100644
--- a/tests/auto/blackbox/testdata-qt/qrc/bla.cpp
+++ b/tests/auto/blackbox/testdata-qt/qrc/bla.cpp
@@ -26,8 +26,19 @@
 **
 ****************************************************************************/
 
+#include <QFileInfo>
+
 int main()
 {
-    return 3;
+    QFileInfo f(":/stuff.txt");
+    if (!f.exists())
+        return 1;
+    if (!f.isFile())
+        return 2;
+    QFileInfo d(":/subdir");
+    if (!d.exists())
+        return 3;
+    if (!d.isDir())
+        return 4;
 }
 
diff --git a/tests/auto/blackbox/testdata-qt/qrc/bla.qrc b/tests/auto/blackbox/testdata-qt/qrc/bla.qrc
index 46c93847e..cad4c6cd3 100644
--- a/tests/auto/blackbox/testdata-qt/qrc/bla.qrc
+++ b/tests/auto/blackbox/testdata-qt/qrc/bla.qrc
@@ -1,5 +1,6 @@
 <RCC>
     <qresource prefix="/">
         <file>stuff.txt</file>
+        <file>subdir/</file>
     </qresource>
 </RCC>
diff --git a/tests/auto/blackbox/testdata-qt/qrc/subdir/dummy.txt b/tests/auto/blackbox/testdata-qt/qrc/subdir/dummy.txt
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/tests/auto/blackbox/testdata-qt/qrc/subdir/dummy.txt
diff --git a/tests/auto/blackbox/tst_blackboxqt.cpp b/tests/auto/blackbox/tst_blackboxqt.cpp
index 03e52590b..46f9d2e21 100644
--- a/tests/auto/blackbox/tst_blackboxqt.cpp
+++ b/tests/auto/blackbox/tst_blackboxqt.cpp
@@ -365,7 +365,7 @@ void TestBlackboxQt::track_qobject_change()
 void TestBlackboxQt::track_qrc()
 {
     QDir::setCurrent(testDataDir + "/qrc");
-    QCOMPARE(runQbs(), 0);
+    QCOMPARE(runQbs(QbsRunParameters("run")), 0);
     const QString fileName = relativeExecutableFilePath("i");
     QVERIFY2(regularFileExists(fileName), qPrintable(fileName));
     QDateTime dt = QFileInfo(fileName).lastModified();
@@ -377,9 +377,14 @@ void TestBlackboxQt::track_qrc()
         f.write("bla");
         f.close();
     }
-    QCOMPARE(runQbs(), 0);
+    QCOMPARE(runQbs(QbsRunParameters("run")), 0);
     QVERIFY(regularFileExists(fileName));
     QVERIFY(dt < QFileInfo(fileName).lastModified());
+    WAIT_FOR_NEW_TIMESTAMP();
+    touch("i.qbs");
+    QCOMPARE(runQbs(), 0);
+    QVERIFY2(m_qbsStdout.contains("Resolving"), m_qbsStdout.constData());
+    QVERIFY2(!m_qbsStdout.contains("rcc"), m_qbsStdout.constData());
 }
 
 void TestBlackboxQt::unmocable()