Add rotate.py.

rotate.py

@@ -0,0 +1,60 @@
+import argparse
+import os
+import PIL.Image
+import sys
+
+from voussoirkit import imagetools
+from voussoirkit import pipeable
+from voussoirkit import vlogging
+from voussoirkit import winglob
+
+log = vlogging.getLogger(__name__, 'rotate')
+
+def rotate_argparse(args):
+    if args.angle is None and not args.exif:
+        pipeable.stderr('Either an angle or --exif must be provided.')
+        return 1
+
+    filenames = winglob.glob(args.pattern)
+    for filename in filenames:
+        image = PIL.Image.open(filename)
+
+        if args.exif:
+            (new_image, exif) = imagetools.rotate_by_exif(image)
+            if new_image is image:
+                log.debug('%s doesn\'t need exif rotation.', filename)
+                continue
+            image = new_image
+        else:
+            exif = image.getexif()
+            image = image.rotate(args.angle, expand=True)
+
+        if args.inplace:
+            newname = filename
+        else:
+            if args.exif:
+                suffix = f'_exifrot'
+            else:
+                suffix = f'_{args.angle}'
+            (base, extension) = os.path.splitext(filename)
+            newname = base + suffix + extension
+        pipeable.stdout(newname)
+        image.save(newname, exif=exif, quality=args.quality)
+
+def main(argv):
+    argv = vlogging.main_level_by_argv(argv)
+
+    parser = argparse.ArgumentParser(description=__doc__)
+
+    parser.add_argument('pattern')
+    parser.add_argument('angle', nargs='?', type=int, default=None)
+    parser.add_argument('--exif', action='store_true')
+    parser.add_argument('--inplace', action='store_true')
+    parser.add_argument('--quality', type=int, default=100)
+    parser.set_defaults(func=rotate_argparse)
+
+    args = parser.parse_args(argv)
+    return args.func(args)
+
+if __name__ == '__main__':
+    raise SystemExit(main(sys.argv[1:]))