Add an option to require transformers to generate all declared outputs.

This ensures that a successful build cannot complete without all output
artifacts of all rules and transformers in the project existing (unless
they are marked alwaysUpdated: false).

This is undesirable to enable by default due to the potential overhead,
but can be a useful debugging tool and so is provided as an option.

Change-Id: I46ee49e28cc06d5aff9a3cfd520f929fef4de3f8
Reviewed-by: Christian Kandeler <christian.kandeler@theqtcompany.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/src/lib/corelib/tools/buildoptions.cpp b/src/lib/corelib/tools/buildoptions.cpp
index fafb86404..a2d5c2db2 100644
--- a/src/lib/corelib/tools/buildoptions.cpp
+++ b/src/lib/corelib/tools/buildoptions.cpp
@@ -40,6 +40,7 @@ class BuildOptionsPrivate : public QSharedData
 public:
     BuildOptionsPrivate()
         : maxJobCount(0), dryRun(false), keepGoing(false), forceTimestampCheck(false),
+          forceOutputCheck(false),
           logElapsedTime(false), echoMode(defaultCommandEchoMode()), install(true),
           removeExistingInstallation(false), onlyExecuteRules(false)
     {
@@ -52,6 +53,7 @@ public:
     bool dryRun;
     bool keepGoing;
     bool forceTimestampCheck;
+    bool forceOutputCheck;
     bool logElapsedTime;
     CommandEchoMode echoMode;
     bool install;
@@ -240,6 +242,25 @@ void BuildOptions::setForceTimestampCheck(bool enabled)
 }
 
 /*!
+ * \brief Returns true if qbs will test whether rules and transformers actually create their
+ * declared output artifacts.
+ * The default is \c false.
+ */
+bool BuildOptions::forceOutputCheck() const
+{
+    return d->forceOutputCheck;
+}
+
+/*!
+ * \brief Controls whether qbs should test whether rules and transformers actually create their
+ * declared output artifacts. Enabling this may introduce some small I/O overhead during the build.
+ */
+void BuildOptions::setForceOutputCheck(bool enabled)
+{
+    d->forceOutputCheck = enabled;
+}
+
+/*!
  * \brief Returns true iff the time the operation takes will be logged.
  * The default is \c false.
  */