scripts/dl_cleanup.py

   1 #!/usr/bin/env python
   2 """
   3 # OpenWRT download directory cleanup utility.
   4 # Delete all but the very last version of the program tarballs.
   5 #
   6 # Copyright (c) 2010 Michael Buesch <mb@bu3sch.de>
   7 """
   8
   9 import sys
  10 import os
  11 import re
  12 import getopt
  13
  14 DEBUG = 0
  15
  16 # Commandline options
  17 opt_dryrun = False
  18
  19
  20 def parseVer_1234(match):
  21         progname = match.group(1)
  22         progversion = (int(match.group(2)) << 64) |\
  23                       (int(match.group(3)) << 48) |\
  24                       (int(match.group(4)) << 32) |\
  25                       (int(match.group(5)) << 16)
  26         return (progname, progversion)
  27
  28 def parseVer_123(match):
  29         progname = match.group(1)
  30         patchlevel = match.group(5)
  31         if patchlevel:
  32                 patchlevel = ord(patchlevel[0])
  33         else:
  34                 patchlevel = 0
  35         progversion = (int(match.group(2)) << 64) |\
  36                       (int(match.group(3)) << 48) |\
  37                       (int(match.group(4)) << 32) |\
  38                       patchlevel
  39         return (progname, progversion)
  40
  41 def parseVer_12(match):
  42         progname = match.group(1)
  43         patchlevel = match.group(4)
  44         if patchlevel:
  45                 patchlevel = ord(patchlevel[0])
  46         else:
  47                 patchlevel = 0
  48         progversion = (int(match.group(2)) << 64) |\
  49                       (int(match.group(3)) << 48) |\
  50                       patchlevel
  51         return (progname, progversion)
  52
  53 def parseVer_r(match):
  54         progname = match.group(1)
  55         progversion = (int(match.group(2)) << 64)
  56         return (progname, progversion)
  57
  58 def parseVer_ymd(match):
  59         progname = match.group(1)
  60         progversion = (int(match.group(2)) << 64) |\
  61                       (int(match.group(3)) << 48) |\
  62                       (int(match.group(4)) << 32)
  63         return (progname, progversion)
  64
  65 extensions = (
  66         ".tar.gz",
  67         ".tar.bz2",
  68         ".orig.tar.gz",
  69         ".orig.tar.bz2",
  70         ".zip",
  71         ".tgz",
  72         ".tbz",
  73 )
  74
  75 versionRegex = (
  76         (re.compile(r"(.+)[-_](\d+)\.(\d+)\.(\d+)\.(\d+)"), parseVer_1234),     # xxx-1.2.3.4
  77         (re.compile(r"(.+)[-_](\d\d\d\d)-?(\d\d)-?(\d\d)"), parseVer_ymd),      # xxx-YYYY-MM-DD
  78         (re.compile(r"(.+)[-_](\d+)\.(\d+)\.(\d+)(\w?)"), parseVer_123),        # xxx-1.2.3a
  79         (re.compile(r"(.+)[-_](\d+)\.(\d+)(\w?)"), parseVer_12),                # xxx-1.2a
  80         (re.compile(r"(.+)[-_]r?(\d+)"), parseVer_r),                           # xxx-r1111
  81 )
  82
  83 blacklist = (
  84         re.compile(r"wl_apsta.*"),
  85         re.compile(r"boost.*"),
  86         re.compile(r".*\.fw"),
  87         re.compile(r".*\.arm"),
  88         re.compile(r".*\.bin"),
  89         re.compile(r"RT\d+_Firmware.*"),
  90 )
  91
  92 class EntryParseError(Exception): pass
  93
  94 class Entry:
  95         def __init__(self, directory, filename):
  96                 self.directory = directory
  97                 self.filename = filename
  98                 self.progname = ""
  99
 100                 for ext in extensions:
 101                         if filename.endswith(ext):
 102                                 filename = filename[0:0-len(ext)]
 103                                 break
 104                 else:
 105                         if DEBUG:
 106                                 print "Extension did not match on", filename
 107                         raise EntryParseError("ext")
 108                 for (regex, parseVersion) in versionRegex:
 109                         match = regex.match(filename)
 110                         if match:
 111                                 (self.progname, self.version) = parseVersion(match)
 112                                 break
 113                 else:
 114                         if DEBUG:
 115                                 print "Version regex did not match on", filename
 116                         raise EntryParseError("ver")
 117
 118         def deleteFile(self):
 119                 path = (self.directory + "/" + self.filename).replace("//", "/")
 120                 print "Deleting", path
 121                 if not opt_dryrun:
 122                         os.unlink(path)
 123
 124         def __eq__(self, y):
 125                 return self.filename == y.filename
 126
 127         def __ge__(self, y):
 128                 return self.version >= y.version
 129
 130 def usage():
 131         print "OpenWRT download directory cleanup utility"
 132         print "Usage: " + sys.argv[0] + " [OPTIONS] <path/to/dl>"
 133         print ""
 134         print " -d|--dry-run            Do a dry-run. Don't delete any files"
 135
 136 def main(argv):
 137         global opt_dryrun
 138
 139         try:
 140                 (opts, args) = getopt.getopt(argv[1:],
 141                         "hd",
 142                         [ "help", "dry-run", ])
 143                 if len(args) != 1:
 144                         raise getopt.GetoptError()
 145         except getopt.GetoptError:
 146                 usage()
 147                 return 1
 148         directory = args[0]
 149         for (o, v) in opts:
 150                 if o in ("-h", "--help"):
 151                         usage()
 152                         return 0
 153                 if o in ("-d", "--dry-run"):
 154                         opt_dryrun = True
 155
 156         # Create a directory listing and parse the file names.
 157         entries = []
 158         for filename in os.listdir(directory):
 159                 if filename == "." or filename == "..":
 160                         continue
 161                 for black in blacklist:
 162                         if black.match(filename):
 163                                 if opt_dryrun:
 164                                         print filename, "is blacklisted"
 165                                 break
 166                 else:
 167                         try:
 168                                 entries.append(Entry(directory, filename))
 169                         except (EntryParseError), e: pass
 170
 171         # Create a map of programs
 172         progmap = {}
 173         for entry in entries:
 174                 if entry.progname in progmap.keys():
 175                         progmap[entry.progname].append(entry)
 176                 else:
 177                         progmap[entry.progname] = [entry,]
 178
 179         # Traverse the program map and delete everything but the last version
 180         for prog in progmap:
 181                 lastVersion = None
 182                 versions = progmap[prog]
 183                 for version in versions:
 184                         if lastVersion is None or version >= lastVersion:
 185                                 lastVersion = version
 186                 if lastVersion:
 187                         for version in versions:
 188                                 if version != lastVersion:
 189                                         version.deleteFile()
 190                         if opt_dryrun:
 191                                 print "Keeping", lastVersion.filename
 192
 193         return 0
 194
 195 if __name__ == "__main__":
 196         sys.exit(main(sys.argv))