[#149 state:fixed] Fixed crash on result saving.

core/results.py

@@ -8,10 +8,13 @@
 
 import logging
 import re
+import os
+import os.path as op
 from xml.etree import ElementTree as ET
 
 from . import engine
 from jobprogress.job import nulljob
+from hscommon.conflict import get_conflicted_name
 from hscommon.markable import Markable
 from hscommon.util import flatten, nonone, FileOrPath, format_size
 from hscommon.trans import tr
@@ -304,8 +307,22 @@ class Results(Markable):
                 match_elem.set('second', str(dupe2index[match.second]))
                 match_elem.set('percentage', str(int(match.percentage)))
         tree = ET.ElementTree(root)
-        with FileOrPath(outfile, 'wb') as fp:
+        
-            tree.write(fp, encoding='utf-8')
+        def do_write(outfile):
+            with FileOrPath(outfile, 'wb') as fp:
+                tree.write(fp, encoding='utf-8')
+        
+        try:
+            do_write(outfile)
+        except IOError as e:
+            if e.errno == 21: # outfile is a directory
+                p = str(outfile)
+                dirname, basename = op.split(p)
+                otherfiles = os.listdir(dirname)
+                newname = get_conflicted_name(otherfiles, basename)
+                do_write(op.join(dirname, newname))
+            else:
+                raise
         self.is_modified = False
     
     def sort_dupes(self, key, asc=True, delta=False):

core/tests/app_test.py

@@ -137,6 +137,7 @@ class TestCaseDupeGuru:
         eq_(len(app.results.groups), 0)
     
     def test_rename_when_nothing_is_selected(self):
+        # Issue #140
         # It's possible that rename operation has its selected row swept off from under it, thus
         # making the selected row None. Don't crash when it happens.
         dgapp = DupeGuru()

core/tests/results_test.py

@@ -77,6 +77,18 @@ class TestCaseResultsEmpty:
         self.results.groups = []
         assert not self.results.is_modified
     
+    def test_save_to_same_name_as_folder(self, tmpdir):
+        # Issue #149
+        # When saving to a filename that already exists, the file is overwritten. However, when
+        # the name exists but that it's a folder, then there used to be a crash. The proper fix
+        # would have been some kind of feedback to the user, but the work involved for something
+        # that simply never happens (I never received a report of this crash, I experienced it
+        # while fooling around) is too much. Instead, use standard name conflict resolution.
+        folderpath = tmpdir.join('foo')
+        folderpath.mkdir()
+        self.results.save_to_xml(str(folderpath)) # no crash
+        assert tmpdir.join('[000] foo').check()
+    
 
 class TestCaseResultsWithSomeGroups:
     def setup_method(self, method):