qmake: add "undecorated" mode to $$prompt()

the normal mode forces the prompt into a pattern which may be
undesirable.

Change-Id: I01689c7a6573415801862348b32bafc6a609ed4a
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

2 files changed, 16 insertions, 7 deletions

diff --git a/qmake/doc/src/qmake-manual.qdoc b/qmake/doc/src/qmake-manual.qdoc
index b6c950cab6..aa6c8b35cc 100644
--- a/qmake/doc/src/qmake-manual.qdoc
+++ b/qmake/doc/src/qmake-manual.qdoc
@@ -3018,10 +3018,13 @@
     sum = $$num_add($$first, $$second_neg)
     \endcode
 
-    \section2 prompt(question)
+    \section2 prompt(question [, decorate])
 
     Displays the specified \c question, and returns a value read from stdin.
 
+    If \c decorate is \e true (the default), the question gets a generic
+    prefix and suffix identifying it as a prompt.
+
     \section2 quote(string)
 
     Converts a whole \c string into a single entity and returns the result.
diff --git a/qmake/library/qmakebuiltins.cpp b/qmake/library/qmakebuiltins.cpp
index 6fe3ba1605..b8df43c5fb 100644
--- a/qmake/library/qmakebuiltins.cpp
+++ b/qmake/library/qmakebuiltins.cpp
@@ -1091,16 +1091,22 @@ ProStringList QMakeEvaluator::evaluateBuiltinExpand(
         break;
 #ifdef PROEVALUATOR_FULL
     case E_PROMPT: {
-        if (args.count() != 1) {
-            evalError(fL1S("prompt(question) requires one argument."));
+        if (args.count() != 1 && args.count() != 2) {
+            evalError(fL1S("prompt(question, [decorate=true]) requires one or two arguments."));
 //        } else if (currentFileName() == QLatin1String("-")) {
 //            evalError(fL1S("prompt(question) cannot be used when '-o -' is used"));
         } else {
             QString msg = m_option->expandEnvVars(args.at(0).toQString(m_tmp1));
-            if (!msg.endsWith(QLatin1Char('?')))
-                msg += QLatin1Char('?');
-            fprintf(stderr, "Project PROMPT: %s ", qPrintable(msg));
-
+            bool decorate = true;
+            if (args.count() == 2)
+                decorate = isTrue(args.at(1));
+            if (decorate) {
+                if (!msg.endsWith(QLatin1Char('?')))
+                    msg += QLatin1Char('?');
+                fprintf(stderr, "Project PROMPT: %s ", qPrintable(msg));
+            } else {
+                fputs(qPrintable(msg), stderr);
+            }
             QFile qfile;
             if (qfile.open(stdin, QIODevice::ReadOnly)) {
                 QTextStream t(&qfile);