From 1b4ea11332f74984a62a4cc4597ad49f5b5269dc Mon Sep 17 00:00:00 2001
From: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Date: Thu, 30 Jun 2016 16:02:29 +0200
Subject: [PATCH] make error() propagate from requires() and REQUIRES=

that can make sense if a function which determines the availability of
a dependency fails to do so for unexpected reasons.

Change-Id: If6cd113df25aee66830c120a2fab067c822a4543
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
---
 qmake/library/qmakebuiltins.cpp        |  3 ++-
 qmake/library/qmakeevaluator.cpp       | 13 +++++++++----
 qmake/library/qmakeevaluator.h         |  2 +-
 tests/auto/tools/qmakelib/evaltest.cpp | 14 ++++++++++++++
 4 files changed, 26 insertions(+), 6 deletions(-)

diff --git a/qmake/library/qmakebuiltins.cpp b/qmake/library/qmakebuiltins.cpp
index d8cd8c5c90c..272b0cc30d4 100644
--- a/qmake/library/qmakebuiltins.cpp
+++ b/qmake/library/qmakebuiltins.cpp
@@ -1200,7 +1200,8 @@ QMakeEvaluator::VisitReturn QMakeEvaluator::evaluateBuiltinConditional(
         return ReturnFalse;
     case T_REQUIRES:
 #ifdef PROEVALUATOR_FULL
-        checkRequirements(args);
+        if (checkRequirements(args) == ReturnError)
+            return ReturnError;
 #endif
         return ReturnFalse; // Another qmake breakage
     case T_EVAL: {
diff --git a/qmake/library/qmakeevaluator.cpp b/qmake/library/qmakeevaluator.cpp
index 1243a77afa8..a09168876a8 100644
--- a/qmake/library/qmakeevaluator.cpp
+++ b/qmake/library/qmakeevaluator.cpp
@@ -933,7 +933,7 @@ QMakeEvaluator::VisitReturn QMakeEvaluator::visitProVariable(
     }
 #ifdef PROEVALUATOR_FULL
     else if (varName == statics.strREQUIRES)
-        checkRequirements(values(varName));
+        return checkRequirements(values(varName));
 #endif
 
     return ReturnTrue;
@@ -1795,12 +1795,17 @@ QMakeEvaluator::VisitReturn QMakeEvaluator::evaluateConditional(
 }
 
 #ifdef PROEVALUATOR_FULL
-void QMakeEvaluator::checkRequirements(const ProStringList &deps)
+QMakeEvaluator::VisitReturn QMakeEvaluator::checkRequirements(const ProStringList &deps)
 {
     ProStringList &failed = valuesRef(ProKey("QMAKE_FAILED_REQUIREMENTS"));
-    foreach (const ProString &dep, deps)
-        if (evaluateConditional(dep.toQString(), m_current.pro->fileName(), m_current.line) != ReturnTrue)
+    foreach (const ProString &dep, deps) {
+        VisitReturn vr = evaluateConditional(dep.toQString(), m_current.pro->fileName(), m_current.line);
+        if (vr == ReturnError)
+            return ReturnError;
+        if (vr != ReturnTrue)
             failed << dep;
+    }
+    return ReturnTrue;
 }
 #endif
 
diff --git a/qmake/library/qmakeevaluator.h b/qmake/library/qmakeevaluator.h
index 9625c8b8dfa..f370898cc93 100644
--- a/qmake/library/qmakeevaluator.h
+++ b/qmake/library/qmakeevaluator.h
@@ -222,7 +222,7 @@ public:
 
     VisitReturn evaluateConditional(const QString &cond, const QString &where, int line = -1);
 #ifdef PROEVALUATOR_FULL
-    void checkRequirements(const ProStringList &deps);
+    VisitReturn checkRequirements(const ProStringList &deps);
 #endif
 
     void updateMkspecPaths();
diff --git a/tests/auto/tools/qmakelib/evaltest.cpp b/tests/auto/tools/qmakelib/evaltest.cpp
index b7acf70e882..934ee580edf 100644
--- a/tests/auto/tools/qmakelib/evaltest.cpp
+++ b/tests/auto/tools/qmakelib/evaltest.cpp
@@ -707,6 +707,20 @@ void tst_qmakelib::addControlStructs()
             << "VAR = UNDEF\nOKE = UNDEF"
             << "Project ERROR: error"
             << false;
+
+    QTest::newRow("REQUIRES = error()")
+            << "REQUIRES = error(error)\n"
+               "OKE = 1"
+            << "OKE = UNDEF"
+            << "Project ERROR: error"
+            << false;
+
+    QTest::newRow("requires(error())")
+            << "requires(error(error))\n"
+               "OKE = 1"
+            << "OKE = UNDEF"
+            << "Project ERROR: error"
+            << false;
 }
 
 void tst_qmakelib::addReplaceFunctions(const QString &qindir)