dl_cleanup: Utility to delete all but the very last version of the tarballs in the download directory.

The tool does currently have a few false positives (probably below 1%), but this is harmless, because buildroot will just redownload them.


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19018 3c298f89-4303-0410-b956-a3cf2f4a3e73

scripts/dl_cleanup.py

@@ -0,0 +1,176 @@
+#!/usr/bin/env python
+"""
+# OpenWRT download directory cleanup utility.
+# Delete all but the very last version of the program tarballs.
+#
+# Copyright (c) 2010 Michael Buesch <mb@bu3sch.de>
+"""
+
+import sys
+import os
+import re
+
+DEBUG = 0
+
+
+def parseVer_1234(match):
+	progname = match.group(1)
+	progversion = (int(match.group(2)) << 64) |\
+		      (int(match.group(3)) << 48) |\
+		      (int(match.group(4)) << 32) |\
+		      (int(match.group(5)) << 16)
+	return (progname, progversion)
+
+def parseVer_123(match):
+	progname = match.group(1)
+	patchlevel = match.group(5)
+	if patchlevel:
+		patchlevel = ord(patchlevel[0])
+	else:
+		patchlevel = 0
+	progversion = (int(match.group(2)) << 64) |\
+		      (int(match.group(3)) << 48) |\
+		      (int(match.group(4)) << 32) |\
+		      patchlevel
+	return (progname, progversion)
+
+def parseVer_12(match):
+	progname = match.group(1)
+	patchlevel = match.group(4)
+	if patchlevel:
+		patchlevel = ord(patchlevel[0])
+	else:
+		patchlevel = 0
+	progversion = (int(match.group(2)) << 64) |\
+		      (int(match.group(3)) << 48) |\
+		      patchlevel
+	return (progname, progversion)
+
+def parseVer_r(match):
+	progname = match.group(1)
+	progversion = (int(match.group(2)) << 64)
+	return (progname, progversion)
+
+def parseVer_ymd(match):
+	progname = match.group(1)
+	progversion = (int(match.group(2)) << 64) |\
+		      (int(match.group(3)) << 48) |\
+		      (int(match.group(4)) << 32)
+	return (progname, progversion)
+
+extensions = (
+	".tar.gz",
+	".tar.bz2",
+	".orig.tar.gz",
+	".orig.tar.bz2",
+	".zip",
+	".tgz",
+	".tbz",
+)
+
+versionRegex = (
+	(re.compile(r"(.+)[-_](\d+)\.(\d+)\.(\d+)\.(\d+)"), parseVer_1234),	# xxx-1.2.3.4
+	(re.compile(r"(.+)[-_](\d\d\d\d)-?(\d\d)-?(\d\d)"), parseVer_ymd),	# xxx-YYYY-MM-DD
+	(re.compile(r"(.+)[-_](\d+)\.(\d+)\.(\d+)(\w?)"), parseVer_123),	# xxx-1.2.3a
+	(re.compile(r"(.+)[-_](\d+)\.(\d+)(\w?)"), parseVer_12),		# xxx-1.2a
+	(re.compile(r"(.+)[-_]r?(\d+)"), parseVer_r),				# xxx-r1111
+)
+
+blacklist = (
+	re.compile(r"wl_apsta.*"),
+	re.compile(r"boost.*"),
+	re.compile(r".*\.fw"),
+	re.compile(r".*\.arm"),
+	re.compile(r".*\.bin"),
+	re.compile(r"RT\d+_Firmware.*"),
+)
+
+class EntryParseError(Exception): pass
+
+class Entry:
+	def __init__(self, directory, filename):
+		self.directory = directory
+		self.filename = filename
+		self.progname = ""
+
+		for ext in extensions:
+			if filename.endswith(ext):
+				filename = filename[0:0-len(ext)]
+				break
+		else:
+			if DEBUG:
+				print "Extension did not match on", filename
+			raise EntryParseError("ext")
+		for (regex, parseVersion) in versionRegex:
+			match = regex.match(filename)
+			if match:
+				(self.progname, self.version) = parseVersion(match)
+				break
+		else:
+			if DEBUG:
+				print "Version regex did not match on", filename
+			raise EntryParseError("ver")
+
+	def deleteFile(self):
+		path = (self.directory + "/" + self.filename).replace("//", "/")
+		print "Deleting", path
+		if not DEBUG:
+			os.unlink(path)
+
+	def __eq__(self, y):
+		return self.filename == y.filename
+
+	def __ge__(self, y):
+		return self.version >= y.version
+
+def usage():
+	print "OpenWRT download directory cleanup utility"
+	print "Usage: " + sys.argv[0] + " path/to/dl"
+
+def main(argv):
+	if len(argv) != 2:
+		usage()
+		return 1
+	directory = argv[1]
+
+	# Create a directory listing and parse the file names.
+	entries = []
+	for filename in os.listdir(directory):
+		if filename == "." or filename == "..":
+			continue
+		for black in blacklist:
+			if black.match(filename):
+				if DEBUG:
+					print filename, "is blacklisted"
+				break
+		else:
+			try:
+				entries.append(Entry(directory, filename))
+			except (EntryParseError), e: pass
+
+	# Create a map of programs
+	progmap = {}
+	for entry in entries:
+		if entry.progname in progmap.keys():
+			progmap[entry.progname].append(entry)
+		else:
+			progmap[entry.progname] = [entry,]
+
+	# Traverse the program map and delete everything but the last version
+	for prog in progmap:
+		lastVersion = None
+		versions = progmap[prog]
+		for version in versions:
+			if lastVersion is None or version >= lastVersion:
+				lastVersion = version
+		if lastVersion:
+			for version in versions:
+				if version != lastVersion:
+					version.deleteFile()
+			if DEBUG:
+				print "Keeping", lastVersion.filename
+
+	return 0
+
+if __name__ == "__main__":
+	sys.exit(main(sys.argv))