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         try:
  31                 patchlevel = match.group(5)
  32         except (IndexError), e:
  33                 patchlevel = None
  34         if patchlevel:
  35                 patchlevel = ord(patchlevel[0])
  36         else:
  37                 patchlevel = 0
  38         progversion = (int(match.group(2)) << 64) |\
  39                       (int(match.group(3)) << 48) |\
  40                       (int(match.group(4)) << 32) |\
  41                       patchlevel
  42         return (progname, progversion)
  43
  44 def parseVer_12(match):
  45         progname = match.group(1)
  46         try:
  47                 patchlevel = match.group(4)
  48         except (IndexError), e:
  49                 patchlevel = None
  50         if patchlevel:
  51                 patchlevel = ord(patchlevel[0])
  52         else:
  53                 patchlevel = 0
  54         progversion = (int(match.group(2)) << 64) |\
  55                       (int(match.group(3)) << 48) |\
  56                       patchlevel
  57         return (progname, progversion)
  58
  59 def parseVer_r(match):
  60         progname = match.group(1)
  61         progversion = (int(match.group(2)) << 64)
  62         return (progname, progversion)
  63
  64 def parseVer_ymd(match):
  65         progname = match.group(1)
  66         progversion = (int(match.group(2)) << 64) |\
  67                       (int(match.group(3)) << 48) |\
  68                       (int(match.group(4)) << 32)
  69         return (progname, progversion)
  70
  71 extensions = (
  72         ".tar.gz",
  73         ".tar.bz2",
  74         ".orig.tar.gz",
  75         ".orig.tar.bz2",
  76         ".zip",
  77         ".tgz",
  78         ".tbz",
  79 )
  80
  81 versionRegex = (
  82         (re.compile(r"(.+)[-_](\d+)\.(\d+)\.(\d+)\.(\d+)"), parseVer_1234),     # xxx-1.2.3.4
  83         (re.compile(r"(.+)[-_](\d\d\d\d)-?(\d\d)-?(\d\d)"), parseVer_ymd),      # xxx-YYYY-MM-DD
  84         (re.compile(r"(.+)[-_](\d+)\.(\d+)\.(\d+)(\w?)"), parseVer_123),        # xxx-1.2.3a
  85         (re.compile(r"(.+)[-_](\d+)_(\d+)_(\d+)"), parseVer_123),               # xxx-1_2_3
  86         (re.compile(r"(.+)[-_](\d+)\.(\d+)(\w?)"), parseVer_12),                # xxx-1.2a
  87         (re.compile(r"(.+)[-_]r?(\d+)"), parseVer_r),                           # xxx-r1111
  88 )
  89
  90 blacklist = [
  91         ("linux",               re.compile(r"linux-.*")),
  92         ("gcc",                 re.compile(r"gcc-.*")),
  93         ("wl_apsta",            re.compile(r"wl_apsta.*")),
  94         (".fw",                 re.compile(r".*\.fw")),
  95         (".arm",                re.compile(r".*\.arm")),
  96         (".bin",                re.compile(r".*\.bin")),
  97         ("rt-firmware",         re.compile(r"RT\d+_Firmware.*")),
  98 ]
  99
 100 class EntryParseError(Exception): pass
 101
 102 class Entry:
 103         def __init__(self, directory, filename):
 104                 self.directory = directory
 105                 self.filename = filename
 106                 self.progname = ""
 107
 108                 for ext in extensions:
 109                         if filename.endswith(ext):
 110                                 filename = filename[0:0-len(ext)]
 111                                 break
 112                 else:
 113                         if DEBUG:
 114                                 print "Extension did not match on", filename
 115                         raise EntryParseError("ext")
 116                 for (regex, parseVersion) in versionRegex:
 117                         match = regex.match(filename)
 118                         if match:
 119                                 (self.progname, self.version) = parseVersion(match)
 120                                 break
 121                 else:
 122                         if DEBUG:
 123                                 print "Version regex did not match on", filename
 124                         raise EntryParseError("ver")
 125
 126         def deleteFile(self):
 127                 path = (self.directory + "/" + self.filename).replace("//", "/")
 128                 print "Deleting", path
 129                 if not opt_dryrun:
 130                         os.unlink(path)
 131
 132         def __eq__(self, y):
 133                 return self.filename == y.filename
 134
 135         def __ge__(self, y):
 136                 return self.version >= y.version
 137
 138 def usage():
 139         print "OpenWRT download directory cleanup utility"
 140         print "Usage: " + sys.argv[0] + " [OPTIONS] <path/to/dl>"
 141         print ""
 142         print " -d|--dry-run            Do a dry-run. Don't delete any files"
 143         print " -B|--show-blacklist     Show the blacklist and exit"
 144         print " -w|--whitelist ITEM     Remove ITEM from blacklist"
 145
 146 def main(argv):
 147         global opt_dryrun
 148
 149         try:
 150                 (opts, args) = getopt.getopt(argv[1:],
 151                         "hdBw:",
 152                         [ "help", "dry-run", "show-blacklist", "whitelist=", ])
 153                 if len(args) != 1:
 154                         raise getopt.GetoptError()
 155         except getopt.GetoptError:
 156                 usage()
 157                 return 1
 158         directory = args[0]
 159         for (o, v) in opts:
 160                 if o in ("-h", "--help"):
 161                         usage()
 162                         return 0
 163                 if o in ("-d", "--dry-run"):
 164                         opt_dryrun = True
 165                 if o in ("-w", "--whitelist"):
 166                         for i in range(0, len(blacklist)):
 167                                 (name, regex) = blacklist[i]
 168                                 if name == v:
 169                                         del blacklist[i]
 170                                         break
 171                         else:
 172                                 print "Whitelist error: Item", v,\
 173                                       "is not in blacklist"
 174                                 return 1
 175                 if o in ("-B", "--show-blacklist"):
 176                         for (name, regex) in blacklist:
 177                                 print name
 178                         return 0
 179
 180         # Create a directory listing and parse the file names.
 181         entries = []
 182         for filename in os.listdir(directory):
 183                 if filename == "." or filename == "..":
 184                         continue
 185                 for (name, regex) in blacklist:
 186                         if regex.match(filename):
 187                                 if opt_dryrun:
 188                                         print filename, "is blacklisted"
 189                                 break
 190                 else:
 191                         try:
 192                                 entries.append(Entry(directory, filename))
 193                         except (EntryParseError), e: pass
 194
 195         # Create a map of programs
 196         progmap = {}
 197         for entry in entries:
 198                 if entry.progname in progmap.keys():
 199                         progmap[entry.progname].append(entry)
 200                 else:
 201                         progmap[entry.progname] = [entry,]
 202
 203         # Traverse the program map and delete everything but the last version
 204         for prog in progmap:
 205                 lastVersion = None
 206                 versions = progmap[prog]
 207                 for version in versions:
 208                         if lastVersion is None or version >= lastVersion:
 209                                 lastVersion = version
 210                 if lastVersion:
 211                         for version in versions:
 212                                 if version != lastVersion:
 213                                         version.deleteFile()
 214                         if opt_dryrun:
 215                                 print "Keeping", lastVersion.filename
 216
 217         return 0
 218
 219 if __name__ == "__main__":
 220         sys.exit(main(sys.argv))