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         ("linux",               re.compile(r"linux-.*")),
  85         ("gcc",                 re.compile(r"gcc-.*")),
  86         ("boost",               re.compile(r"boost.*")),
  87         ("wl_apsta",            re.compile(r"wl_apsta.*")),
  88         (".fw",                 re.compile(r".*\.fw")),
  89         (".arm",                re.compile(r".*\.arm")),
  90         (".bin",                re.compile(r".*\.bin")),
  91         ("rt-firmware",         re.compile(r"RT\d+_Firmware.*")),
  92 )
  93
  94 class EntryParseError(Exception): pass
  95
  96 class Entry:
  97         def __init__(self, directory, filename):
  98                 self.directory = directory
  99                 self.filename = filename
 100                 self.progname = ""
 101
 102                 for ext in extensions:
 103                         if filename.endswith(ext):
 104                                 filename = filename[0:0-len(ext)]
 105                                 break
 106                 else:
 107                         if DEBUG:
 108                                 print "Extension did not match on", filename
 109                         raise EntryParseError("ext")
 110                 for (regex, parseVersion) in versionRegex:
 111                         match = regex.match(filename)
 112                         if match:
 113                                 (self.progname, self.version) = parseVersion(match)
 114                                 break
 115                 else:
 116                         if DEBUG:
 117                                 print "Version regex did not match on", filename
 118                         raise EntryParseError("ver")
 119
 120         def deleteFile(self):
 121                 path = (self.directory + "/" + self.filename).replace("//", "/")
 122                 print "Deleting", path
 123                 if not opt_dryrun:
 124                         os.unlink(path)
 125
 126         def __eq__(self, y):
 127                 return self.filename == y.filename
 128
 129         def __ge__(self, y):
 130                 return self.version >= y.version
 131
 132 def usage():
 133         print "OpenWRT download directory cleanup utility"
 134         print "Usage: " + sys.argv[0] + " [OPTIONS] <path/to/dl>"
 135         print ""
 136         print " -d|--dry-run            Do a dry-run. Don't delete any files"
 137         print " -B|--show-blacklist     Show the blacklist and exit"
 138
 139 def main(argv):
 140         global opt_dryrun
 141
 142         try:
 143                 (opts, args) = getopt.getopt(argv[1:],
 144                         "hdB",
 145                         [ "help", "dry-run", "show-blacklist", ])
 146                 if len(args) != 1:
 147                         raise getopt.GetoptError()
 148         except getopt.GetoptError:
 149                 usage()
 150                 return 1
 151         directory = args[0]
 152         for (o, v) in opts:
 153                 if o in ("-h", "--help"):
 154                         usage()
 155                         return 0
 156                 if o in ("-d", "--dry-run"):
 157                         opt_dryrun = True
 158                 if o in ("-B", "--show-blacklist"):
 159                         for (name, regex) in blacklist:
 160                                 print name
 161                         return 0
 162
 163         # Create a directory listing and parse the file names.
 164         entries = []
 165         for filename in os.listdir(directory):
 166                 if filename == "." or filename == "..":
 167                         continue
 168                 for (name, regex) in blacklist:
 169                         if regex.match(filename):
 170                                 if opt_dryrun:
 171                                         print filename, "is blacklisted"
 172                                 break
 173                 else:
 174                         try:
 175                                 entries.append(Entry(directory, filename))
 176                         except (EntryParseError), e: pass
 177
 178         # Create a map of programs
 179         progmap = {}
 180         for entry in entries:
 181                 if entry.progname in progmap.keys():
 182                         progmap[entry.progname].append(entry)
 183                 else:
 184                         progmap[entry.progname] = [entry,]
 185
 186         # Traverse the program map and delete everything but the last version
 187         for prog in progmap:
 188                 lastVersion = None
 189                 versions = progmap[prog]
 190                 for version in versions:
 191                         if lastVersion is None or version >= lastVersion:
 192                                 lastVersion = version
 193                 if lastVersion:
 194                         for version in versions:
 195                                 if version != lastVersion:
 196                                         version.deleteFile()
 197                         if opt_dryrun:
 198                                 print "Keeping", lastVersion.filename
 199
 200         return 0
 201
 202 if __name__ == "__main__":
 203         sys.exit(main(sys.argv))