follow up 5ad518afd2. Better handling of temporary directories

python/plugins/processing/algs/qgis/PointsToPaths.py

@@ -119,9 +119,6 @@ class PointsToPaths(GeoAlgorithm):
             f['begin'] = vertices[0][0]
             f['end'] = vertices[-1][0]
 
-            if dirName == '':
-                fileName = system.getTempFilenameInTempFolder('%s.txt' % group)
-            else:
             fileName = os.path.join(dirName, '%s.txt' % group)
 
             fl = open(fileName, 'w')

python/plugins/processing/outputs/OutputDirectory.py

@@ -29,4 +29,4 @@ from processing.outputs.Output import Output
 
 
 class OutputDirectory(Output):
-    pass
+    directory = True

python/plugins/processing/tools/system.py

@@ -29,7 +29,9 @@ import os
 import time
 import sys
 import uuid
+
 from PyQt4.QtCore import *
+
 from qgis.core import *
 
 numExported = 1
@@ -61,6 +63,9 @@ def tempFolder():
 
 
 def setTempOutput(out, alg):
+    if hasattr(out, 'directory'):
+        out.value = getTempDirInTempFolder()
+    else:
         ext = out.getDefaultFileExtension(alg)
         out.value = getTempFilenameInTempFolder(out.name + '.' + ext)
 
@@ -89,6 +94,16 @@ def getTempFilenameInTempFolder(basename):
     return filename
 
 
+def getTempDirInTempFolder():
+    """Returns a temporary directory, putting it into a temp folder.
+    """
+
+    path = tempFolder()
+    path = os.path.join(path, str(uuid.uuid4()).replace('-', ''))
+    mkdir(path)
+    return path
+
+
 def removeInvalidChars(string):
     validChars = \
         'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789:.'