From e6927cbc04da84de7e1ebf731ada6694f8fd61de Mon Sep 17 00:00:00 2001
From: Mike Gerber <mike@sprachgewalt.de>
Date: Wed, 9 Apr 2014 20:15:37 +0200
Subject: [PATCH 1/2] Append only new files

When appending files, check if that file is already in the label file.
Do not append it if it's already there.
---
 sloth/core/commands.py | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/sloth/core/commands.py b/sloth/core/commands.py
index 8cf86a6..28f6c66 100644
--- a/sloth/core/commands.py
+++ b/sloth/core/commands.py
@@ -80,8 +80,9 @@ class DumpLabelsCommand(BaseCommand):
 
 class AppendFilesCommand(BaseCommand):
     """
-    Append image or video files to a label file.  Creates the label
-    file if it does not exist before.
+    Append image or video files to a label file.  Creates the label file if it
+    does not exist before.  If the image or video file is already in the label
+    file, it will not be appended again.
     """
     args = '<labelfile> <file1> [<file2> ...]'
     help = __doc__.strip()
@@ -101,6 +102,8 @@ class AppendFilesCommand(BaseCommand):
             raise CommandError("Expect at least 2 arguments.")
 
         self.labeltool.loadAnnotations(args[0])
+        present_filenames = {a["filename"] for a in self.labeltool.annotations()}
+
         for filename in args[1:]:
             rel_filename = filename
             try:
@@ -109,6 +112,10 @@ class AppendFilesCommand(BaseCommand):
             except:
                 pass
 
+            if rel_filename in present_filenames:
+                logger.info("Not adding file again: %s" % rel_filename)
+                continue
+
             _, ext = os.path.splitext(rel_filename)
             if (not options['image'] and ext.lower() in self.video_extensions) or options['video']:
                 logger.debug("Adding video file: %s" % rel_filename)

From af0829baf5bfe5679984133655634bf0659f64b0 Mon Sep 17 00:00:00 2001
From: Mike Gerber <mike@sprachgewalt.de>
Date: Thu, 28 Aug 2014 17:33:59 +0200
Subject: [PATCH 2/2] Don't append duplicate files on cmd line multiple times

If a file is specified multiple time on the command line, do not
append it multiple times.
---
 sloth/core/commands.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sloth/core/commands.py b/sloth/core/commands.py
index 28f6c66..23851c9 100644
--- a/sloth/core/commands.py
+++ b/sloth/core/commands.py
@@ -123,6 +123,7 @@ class AppendFilesCommand(BaseCommand):
             else:
                 logger.debug("Adding image file: %s" % rel_filename)
                 item = self.labeltool.addImageFile(rel_filename)
+            present_filenames.add(rel_filename)
 
             if options['unlabeled']:
                 item.setUnlabeled(True)