Pop-up box warning if 'groups.tab' or 'contrast.tab' are not in RNA-s…

…eq working directory before dry-running

gui/frame.py

@@ -352,7 +352,17 @@ def init_work_dir( self ):
             showinfo( "Success", "The work directory has successfully initialized!")
         else :
             showerror( "Symlink failed", "" )
-
+
+    def popup_warning(self, filename):
+        try:
+            fname = self.workpath.get() + '/' + filename
+            fh = open(fname, 'r')
+            return False
+        except IOError:
+            print("Could not find required file {} in your working directory:{}".format(filename, self.workpath.get()))
+            showerror("Error","{0} file not found!\nDid you initialize the working directory?\nDid you copy {0} into the working directory?".format(filename))
+            return True
+
     def popup_window( self, text, filename ) :
         top = Toplevel()
 
@@ -691,6 +701,11 @@ def readpaste( self, ftype, comments ):
         return
 
     def dryrun( self ) :
+        pl = self.pipeline_name
+        print("Drying-running: {}".format(pl))
+        if pl == 'RNAseq':
+            if self.popup_warning('groups.tab') or self.popup_warning('contrasts.tab'):
+                return
         self.makejson("none")
         #self.run_button.config( state='active' )
         return self.cmd( "--dryrun -p -s %s/Snakefile --rerun-incomplete -d %s" % ( self.workpath.get(), self.workpath.get()))