Better output on scanner.

scanner/CachePath.py

@@ -1,6 +1,17 @@
 import os.path
 from datetime import datetime
 
+def message(category, text):
+	if message.level <= 0:
+		sep = "  "
+	else:
+		sep = "--"
+	print "%s %s%s[%s]%s%s" % (datetime.now().isoformat(), max(0, message.level) * "  |", sep, category, max(1, (14 - len(category))) * " ", text)
+message.level = -1
+def next_level():
+	message.level += 1
+def back_level():
+	message.level -= 1
 def set_cache_path_base(base):
 	trim_base.base = base
 def untrim_base(path):

scanner/PhotoAlbum.py

@@ -110,6 +110,8 @@ class Photo(object):
 		self.is_valid = True
 		try:
 			mtime = file_mtime(path)
+		except KeyboardInterrupt:
+			raise
 		except:
 			self.is_valid = False
 			return
@@ -121,16 +123,20 @@ class Photo(object):
 		
 		try:
 			image = Image.open(path)
+		except KeyboardInterrupt:
+			raise
 		except:
 			self.is_valid = False
 			return
 		self._metadata(image)
-		self._thumbnails(image, thumb_path)
+		self._thumbnails(image, thumb_path, path)
 	def _metadata(self, image):
 		self._attributes["size"] = image.size
 		self._orientation = 1
 		try:
 			info = image._getexif()
+		except KeyboardInterrupt:
+			raise
 		except:
 			return
 		if not info:
@@ -144,6 +150,8 @@ class Photo(object):
 				if isinstance(decoded, str) and decoded.startswith("DateTime"):
 					try:
 						value = datetime.strptime(value, '%Y:%m:%d %H:%M:%S')
+					except KeyboardInterrupt:
+						raise
 					except:
 						continue
 			exif[decoded] = value
@@ -175,6 +183,8 @@ class Photo(object):
 		if "Flash" in exif and exif["Flash"] in self._metadata.flash_dictionary:
 			try:
 				self._attributes["flash"] = self._metadata.flash_dictionary[exif["Flash"]]
+			except KeyboardInterrupt:
+				raise
 			except:
 				pass
 		if "ExposureProgram" in exif and exif["ExposureProgram"] < len(self._metadata.exposure_list):
@@ -197,19 +207,26 @@ class Photo(object):
 	_metadata.exposure_list = ["Not Defined", "Manual", "Program AE", "Aperture-priority AE", "Shutter speed priority AE", "Creative (Slow speed)", "Action (High speed)", "Portrait", "Landscape", "Bulb"]
 	_metadata.orientation_list = ["Horizontal (normal)", "Mirror horizontal", "Rotate 180", "Mirror vertical", "Mirror horizontal and rotate 270 CW", "Rotate 90 CW", "Mirror horizontal and rotate 90 CW", "Rotate 270 CW"]
 		
-	def _thumbnail(self, image, thumb_path, size, square=False):
+	def _thumbnail(self, image, thumb_path, original_path, size, square=False):
 		thumb_path = os.path.join(thumb_path, image_cache(self._path, size, square))
-		print "Thumbing %s" % thumb_path
+		info_string = "%s -> %spx" % (os.path.basename(original_path), str(size))
+		if square:
+			info_string += ", square"
+		message("thumbing", info_string)
 		if os.path.exists(thumb_path) and file_mtime(thumb_path) >= self._attributes["dateTimeFile"]:
 			return
 		gc.collect()
 		try:
 			image = image.copy()
+		except KeyboardInterrupt:
+			raise
 		except:
 			try:
 				image = image.copy() # we try again to work around PIL bug
+			except KeyboardInterrupt:
+				raise
 			except:
-				print "Image is corrupted. %s will not be created." % thumb_path
+				message("corrupt image", os.path.basename(original_path))
 				return
 		if square:
 			if image.size[0] > image.size[1]:
@@ -227,11 +244,14 @@ class Photo(object):
 		image.thumbnail((size, size), Image.ANTIALIAS)
 		try:
 			image.save(thumb_path, "JPEG")
+		except KeyboardInterrupt:
+			os.unlink(thumb_path)
+			raise
 		except:
-			print "Could not thumbnail %s" % thumb_path
+			message("save failure", os.path.basename(thumb_path))
 			os.unlink(thumb_path)
 		
-	def _thumbnails(self, image, thumb_path):
+	def _thumbnails(self, image, thumb_path, original_path):
 		mirror = image
 		if self._orientation == 2:
 			# Vertical Mirror
@@ -255,7 +275,7 @@ class Photo(object):
 			# Rotation 90
 			mirror = image.transpose(Image.ROTATE_90)
 		for size in Photo.thumb_sizes:
-			self._thumbnail(mirror, thumb_path, size[0], size[1])
+			self._thumbnail(mirror, thumb_path, original_path, size[0], size[1])
 	@property
 	def name(self):
 		return os.path.basename(self._path)
@@ -294,6 +314,8 @@ class Photo(object):
 			if key.startswith("dateTime"):
 				try:
 					dictionary[key] = datetime.strptime(dictionary[key], "%a %b %d %H:%M:%S %Y")
+				except KeyboardInterrupt:
+					raise
 				except:
 					pass
 		return Photo(path, None, dictionary)

scanner/TreeWalker.py

@@ -3,7 +3,7 @@ import os.path
 import sys
 from datetime import datetime
 from PhotoAlbum import Photo, Album, PhotoAlbumEncoder
-from CachePath import json_cache, set_cache_path_base, file_mtime
+from CachePath import *
 import json
 
 class TreeWalker:
@@ -16,23 +16,28 @@ class TreeWalker:
 		self.walk(self.album_path)
 		self.big_lists()
 		self.remove_stale()
+		message("complete", "")
 	def walk(self, path):
-		print "Walking %s" % path
+		next_level()
+		message("walking", os.path.basename(path))
 		cache = os.path.join(self.cache_path, json_cache(path))
 		cached = False
 		cached_album = None
 		if os.path.exists(cache):
-			print "Has cache %s" % path
 			try:
 				cached_album = Album.from_cache(cache)
 				if file_mtime(path) <= file_mtime(cache):
-					print "Album is fully cached"
+					message("full cache", os.path.basename(path))
 					cached = True
 					album = cached_album
 					for photo in album.photos:
 						self.all_photos.append(photo)
+				else:
+					message("partial cache", os.path.basename(path))
+			except KeyboardInterrupt:
+				raise
 			except:
-				print "Cache is corrupted. Rescanning album."
+				message("corrupt cache", os.path.basename(path))
 				cached_album = None
 		if not cached:
 			album = Album(path)
@@ -41,61 +46,70 @@ class TreeWalker:
 				continue
 			try:
 				entry = entry.decode(sys.getfilesystemencoding())
+			except KeyboardInterrupt:
+				raise
 			except:
 				pass
 			entry = os.path.join(path, entry)
 			if os.path.isdir(entry):
 				album.add_album(self.walk(entry))
 			elif not cached and os.path.isfile(entry):
+				next_level()
 				cache_hit = False
 				if cached_album:
 					cached_photo = cached_album.photo_from_path(entry)
 					if cached_photo and file_mtime(entry) <= cached_photo.attributes["dateTimeFile"]:
-						print "Photo cache hit %s" % entry
+						message("cache hit", os.path.basename(entry))
 						cache_hit = True
 						photo = cached_photo
 				if not cache_hit:
-					print "No cache, scanning %s" % entry
+					message("metainfo", os.path.basename(entry))
 					photo = Photo(entry, self.cache_path)
 				if photo.is_valid:
 					self.all_photos.append(photo)
 					album.add_photo(photo)
+				else:
+					message("unreadable", os.path.basename(entry))
+				back_level()
 		if not album.empty:
-			print "Writing cache of %s" % album.cache_path
+			message("caching", os.path.basename(path))
 			album.cache(self.cache_path)
 			self.all_albums.append(album)
 		else:
-			print "Not writing cache of %s because it's empty" % album.cache_path
+			message("empty", os.path.basename(path))
+		back_level()
 		return album
 	def big_lists(self):
 		photo_list = []
 		self.all_photos.sort()
 		for photo in self.all_photos:
 			photo_list.append(photo.path)
-		print "Writing all photos list."
+		message("caching", "all photos path list")
 		fp = open(os.path.join(self.cache_path, "all_photos.json"), 'w')
 		json.dump(photo_list, fp, cls=PhotoAlbumEncoder)
 		fp.close()
 		photo_list.reverse()
-		print "Writing latest photos list."
+		message("caching", "latest photos path list")
 		fp = open(os.path.join(self.cache_path, "latest_photos.json"), 'w')
 		json.dump(photo_list[0:27], fp, cls=PhotoAlbumEncoder)
 		fp.close()
 		
 	def remove_stale(self):
-		print "Building list of all cache entries."
+		message("cleanup", "building stale list")
 		all_cache_entries = { "all_photos.json": True, "latest_photos.json": True }
 		for album in self.all_albums:
 			all_cache_entries[album.cache_path] = True
 		for photo in self.all_photos:
 			for entry in photo.image_caches:
 				all_cache_entries[entry] = True
-		print "Searching stale cache entries."
+		message("cleanup", "searching for stale cache entries")
 		for cache in os.listdir(self.cache_path):
 			try:
 				cache = cache.decode(sys.getfilesystemencoding())
+			except KeyboardInterrupt:
+				raise
 			except:
 				pass
 			if cache not in all_cache_entries:
-				print "Removing stale cache %s" % cache
+				message("cleanup", os.path.basename(cache))
 				os.unlink(os.path.join(self.cache_path, cache))

scanner/main.py

@@ -1,13 +1,18 @@
 #!/usr/bin/env python
 
 from TreeWalker import TreeWalker
-from sys import argv
+from sys import argv, exit
+from CachePath import message
 
 def main():
 	if len(argv) != 3:
 		print "usage: %s ALBUM_PATH CACHE_PATH" % argv[0]
 		return
-	TreeWalker(argv[1], argv[2])
+	try:
+		TreeWalker(argv[1], argv[2])
+	except KeyboardInterrupt:
+		message("keyboard", "CTRL+C pressed, quitting.")
+		exit(-97)
 	
 if __name__ == "__main__":
 	main()