Nim: Fix build configuration factory priority

Change-Id: I3cdae467f14bf4fa76c3a477a715271a3d7f353b
Reviewed-by: Filippo Cucchetto <filippocucchetto@gmail.com>
Reviewed-by: hjk <hjk@qt.io>

src/plugins/nim/project/nimbuildconfigurationfactory.cpp

@@ -40,6 +40,7 @@
 #include <projectexplorer/projectexplorerconstants.h>
 #include <projectexplorer/projectmacroexpander.h>
 #include <projectexplorer/target.h>
+#include <utils/mimetypes/mimedatabase.h>
 #include <utils/qtcassert.h>
 
 #include <memory>
@@ -159,15 +160,22 @@ BuildConfiguration *NimBuildConfigurationFactory::clone(Target *parent, BuildCon
 
 int NimBuildConfigurationFactory::priority(const Kit *k, const QString &projectPath) const
 {
-    Q_UNUSED(k);
-    Q_UNUSED(projectPath);
-    return 0;
+    MimeDatabase mdb;
+    if (k && mdb.mimeTypeForFile(projectPath).matchesName(Constants::C_NIM_PROJECT_MIMETYPE))
+        return 0;
+    return -1;
 }
 
 int NimBuildConfigurationFactory::priority(const Target *parent) const
 {
-    Q_UNUSED(parent);
-    return 0;
+    return canHandle(parent) ? 0 : -1;
+}
+
+bool NimBuildConfigurationFactory::canHandle(const Target *t) const
+{
+    if (!t->project()->supportsKit(t->kit()))
+        return false;
+    return qobject_cast<NimProject *>(t->project());
 }
 
 FileName NimBuildConfigurationFactory::defaultBuildDirectory(const Kit *k,

src/plugins/nim/project/nimbuildconfigurationfactory.h

@@ -61,6 +61,7 @@ public:
     int priority(const ProjectExplorer::Target *parent) const override;
 
 private:
+    bool canHandle(const ProjectExplorer::Target *t) const;
     static Utils::FileName defaultBuildDirectory(const ProjectExplorer::Kit *k,
                                                  const QString &projectPath,
                                                  const QString &bc, ProjectExplorer::BuildConfiguration::BuildType buildType);