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 # Commandline options
  15 opt_dryrun = False
  16
  17
  18 def parseVer_1234(match):
  19         progname = match.group(1)
  20         progversion = (int(match.group(2)) << 64) |\
  21                       (int(match.group(3)) << 48) |\
  22                       (int(match.group(4)) << 32) |\
  23                       (int(match.group(5)) << 16)
  24         return (progname, progversion)
  25
  26 def parseVer_123(match):
  27         progname = match.group(1)
  28         try:
  29                 patchlevel = match.group(5)
  30         except (IndexError), e:
  31                 patchlevel = None
  32         if patchlevel:
  33                 patchlevel = ord(patchlevel[0])
  34         else:
  35                 patchlevel = 0
  36         progversion = (int(match.group(2)) << 64) |\
  37                       (int(match.group(3)) << 48) |\
  38                       (int(match.group(4)) << 32) |\
  39                       patchlevel
  40         return (progname, progversion)
  41
  42 def parseVer_12(match):
  43         progname = match.group(1)
  44         try:
  45                 patchlevel = match.group(4)
  46         except (IndexError), e:
  47                 patchlevel = None
  48         if patchlevel:
  49                 patchlevel = ord(patchlevel[0])
  50         else:
  51                 patchlevel = 0
  52         progversion = (int(match.group(2)) << 64) |\
  53                       (int(match.group(3)) << 48) |\
  54                       patchlevel
  55         return (progname, progversion)
  56
  57 def parseVer_r(match):
  58         progname = match.group(1)
  59         progversion = (int(match.group(2)) << 64)
  60         return (progname, progversion)
  61
  62 def parseVer_ymd(match):
  63         progname = match.group(1)
  64         progversion = (int(match.group(2)) << 64) |\
  65                       (int(match.group(3)) << 48) |\
  66                       (int(match.group(4)) << 32)
  67         return (progname, progversion)
  68
  69 extensions = (
  70         ".tar.gz",
  71         ".tar.bz2",
  72         ".orig.tar.gz",
  73         ".orig.tar.bz2",
  74         ".zip",
  75         ".tgz",
  76         ".tbz",
  77 )
  78
  79 versionRegex = (
  80         (re.compile(r"(.+)[-_](\d+)\.(\d+)\.(\d+)\.(\d+)"), parseVer_1234),     # xxx-1.2.3.4
  81         (re.compile(r"(.+)[-_](\d\d\d\d)-?(\d\d)-?(\d\d)"), parseVer_ymd),      # xxx-YYYY-MM-DD
  82         (re.compile(r"(.+)[-_](\d+)\.(\d+)\.(\d+)(\w?)"), parseVer_123),        # xxx-1.2.3a
  83         (re.compile(r"(.+)[-_](\d+)_(\d+)_(\d+)"), parseVer_123),               # xxx-1_2_3
  84         (re.compile(r"(.+)[-_](\d+)\.(\d+)(\w?)"), parseVer_12),                # xxx-1.2a
  85         (re.compile(r"(.+)[-_]r?(\d+)"), parseVer_r),                           # xxx-r1111
  86 )
  87
  88 blacklist = [
  89         ("linux",               re.compile(r"linux-.*")),
  90         ("gcc",                 re.compile(r"gcc-.*")),
  91         ("wl_apsta",            re.compile(r"wl_apsta.*")),
  92         (".fw",                 re.compile(r".*\.fw")),
  93         (".arm",                re.compile(r".*\.arm")),
  94         (".bin",                re.compile(r".*\.bin")),
  95         ("rt-firmware",         re.compile(r"RT[\d\w]+_Firmware.*")),
  96 ]
  97
  98 class EntryParseError(Exception): pass
  99
 100 class Entry:
 101         def __init__(self, directory, filename):
 102                 self.directory = directory
 103                 self.filename = filename
 104                 self.progname = ""
 105
 106                 for ext in extensions:
 107                         if filename.endswith(ext):
 108                                 filename = filename[0:0-len(ext)]
 109                                 break
 110                 else:
 111                         print self.filename, "has an unknown file-extension"
 112                         raise EntryParseError("ext")
 113                 for (regex, parseVersion) in versionRegex:
 114                         match = regex.match(filename)
 115                         if match:
 116                                 (self.progname, self.version) = parseVersion(match)
 117                                 break
 118                 else:
 119                         print self.filename, "has an unknown version pattern"
 120                         raise EntryParseError("ver")
 121
 122         def deleteFile(self):
 123                 path = (self.directory + "/" + self.filename).replace("//", "/")
 124                 print "Deleting", path
 125                 if not opt_dryrun:
 126                         os.unlink(path)
 127
 128         def __eq__(self, y):
 129                 return self.filename == y.filename
 130
 131         def __ge__(self, y):
 132                 return self.version >= y.version
 133
 134 def usage():
 135         print "OpenWRT download directory cleanup utility"
 136         print "Usage: " + sys.argv[0] + " [OPTIONS] <path/to/dl>"
 137         print ""
 138         print " -d|--dry-run            Do a dry-run. Don't delete any files"
 139         print " -B|--show-blacklist     Show the blacklist and exit"
 140         print " -w|--whitelist ITEM     Remove ITEM from blacklist"
 141
 142 def main(argv):
 143         global opt_dryrun
 144
 145         try:
 146                 (opts, args) = getopt.getopt(argv[1:],
 147                         "hdBw:",
 148                         [ "help", "dry-run", "show-blacklist", "whitelist=", ])
 149                 if len(args) != 1:
 150                         raise getopt.GetoptError()
 151         except getopt.GetoptError:
 152                 usage()
 153                 return 1
 154         directory = args[0]
 155         for (o, v) in opts:
 156                 if o in ("-h", "--help"):
 157                         usage()
 158                         return 0
 159                 if o in ("-d", "--dry-run"):
 160                         opt_dryrun = True
 161                 if o in ("-w", "--whitelist"):
 162                         for i in range(0, len(blacklist)):
 163                                 (name, regex) = blacklist[i]
 164                                 if name == v:
 165                                         del blacklist[i]
 166                                         break
 167                         else:
 168                                 print "Whitelist error: Item", v,\
 169                                       "is not in blacklist"
 170                                 return 1
 171                 if o in ("-B", "--show-blacklist"):
 172                         for (name, regex) in blacklist:
 173                                 print name
 174                         return 0
 175
 176         # Create a directory listing and parse the file names.
 177         entries = []
 178         for filename in os.listdir(directory):
 179                 if filename == "." or filename == "..":
 180                         continue
 181                 for (name, regex) in blacklist:
 182                         if regex.match(filename):
 183                                 if opt_dryrun:
 184                                         print filename, "is blacklisted"
 185                                 break
 186                 else:
 187                         try:
 188                                 entries.append(Entry(directory, filename))
 189                         except (EntryParseError), e: pass
 190
 191         # Create a map of programs
 192         progmap = {}
 193         for entry in entries:
 194                 if entry.progname in progmap.keys():
 195                         progmap[entry.progname].append(entry)
 196                 else:
 197                         progmap[entry.progname] = [entry,]
 198
 199         # Traverse the program map and delete everything but the last version
 200         for prog in progmap:
 201                 lastVersion = None
 202                 versions = progmap[prog]
 203                 for version in versions:
 204                         if lastVersion is None or version >= lastVersion:
 205                                 lastVersion = version
 206                 if lastVersion:
 207                         for version in versions:
 208                                 if version != lastVersion:
 209                                         version.deleteFile()
 210                         if opt_dryrun:
 211                                 print "Keeping", lastVersion.filename
 212
 213         return 0
 214
 215 if __name__ == "__main__":
 216         sys.exit(main(sys.argv))