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, filepath):
  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, filepath):
  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, filepath):
  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, filepath):
  58         progname = match.group(1)
  59         progversion = (int(match.group(2)) << 64)
  60         return (progname, progversion)
  61
  62 def parseVer_ymd(match, filepath):
  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 def parseVer_GIT(match, filepath):
  70         progname = match.group(1)
  71         st = os.stat(filepath)
  72         progversion = int(st.st_mtime) << 64
  73         return (progname, progversion)
  74
  75 extensions = (
  76         ".tar.gz",
  77         ".tar.bz2",
  78         ".orig.tar.gz",
  79         ".orig.tar.bz2",
  80         ".zip",
  81         ".tgz",
  82         ".tbz",
  83 )
  84
  85 versionRegex = (
  86         (re.compile(r"(.+)[-_]([0-9a-fA-F]{40,40})"), parseVer_GIT),            # xxx-GIT_SHASUM
  87         (re.compile(r"(.+)[-_](\d+)\.(\d+)\.(\d+)\.(\d+)"), parseVer_1234),     # xxx-1.2.3.4
  88         (re.compile(r"(.+)[-_](\d\d\d\d)-?(\d\d)-?(\d\d)"), parseVer_ymd),      # xxx-YYYY-MM-DD
  89         (re.compile(r"(.+)[-_](\d+)\.(\d+)\.(\d+)(\w?)"), parseVer_123),        # xxx-1.2.3a
  90         (re.compile(r"(.+)[-_](\d+)_(\d+)_(\d+)"), parseVer_123),               # xxx-1_2_3
  91         (re.compile(r"(.+)[-_](\d+)\.(\d+)(\w?)"), parseVer_12),                # xxx-1.2a
  92         (re.compile(r"(.+)[-_]r?(\d+)"), parseVer_r),                           # xxx-r1111
  93 )
  94
  95 blacklist = [
  96         ("linux",               re.compile(r"linux-.*")),
  97         ("gcc",                 re.compile(r"gcc-.*")),
  98         ("wl_apsta",            re.compile(r"wl_apsta.*")),
  99         (".fw",                 re.compile(r".*\.fw")),
 100         (".arm",                re.compile(r".*\.arm")),
 101         (".bin",                re.compile(r".*\.bin")),
 102         ("rt-firmware",         re.compile(r"RT[\d\w]+_Firmware.*")),
 103 ]
 104
 105 class EntryParseError(Exception): pass
 106
 107 class Entry:
 108         def __init__(self, directory, filename):
 109                 self.directory = directory
 110                 self.filename = filename
 111                 self.progname = ""
 112                 self.fileext = ""
 113
 114                 for ext in extensions:
 115                         if filename.endswith(ext):
 116                                 filename = filename[0:0-len(ext)]
 117                                 self.fileext = ext
 118                                 break
 119                 else:
 120                         print self.filename, "has an unknown file-extension"
 121                         raise EntryParseError("ext")
 122                 for (regex, parseVersion) in versionRegex:
 123                         match = regex.match(filename)
 124                         if match:
 125                                 (self.progname, self.version) = parseVersion(
 126                                         match, directory + "/" + filename + self.fileext)
 127                                 break
 128                 else:
 129                         print self.filename, "has an unknown version pattern"
 130                         raise EntryParseError("ver")
 131
 132         def deleteFile(self):
 133                 path = (self.directory + "/" + self.filename).replace("//", "/")
 134                 print "Deleting", path
 135                 if not opt_dryrun:
 136                         os.unlink(path)
 137
 138         def __eq__(self, y):
 139                 return self.filename == y.filename
 140
 141         def __ge__(self, y):
 142                 return self.version >= y.version
 143
 144 def usage():
 145         print "OpenWRT download directory cleanup utility"
 146         print "Usage: " + sys.argv[0] + " [OPTIONS] <path/to/dl>"
 147         print ""
 148         print " -d|--dry-run            Do a dry-run. Don't delete any files"
 149         print " -B|--show-blacklist     Show the blacklist and exit"
 150         print " -w|--whitelist ITEM     Remove ITEM from blacklist"
 151
 152 def main(argv):
 153         global opt_dryrun
 154
 155         try:
 156                 (opts, args) = getopt.getopt(argv[1:],
 157                         "hdBw:",
 158                         [ "help", "dry-run", "show-blacklist", "whitelist=", ])
 159                 if len(args) != 1:
 160                         raise getopt.GetoptError()
 161         except getopt.GetoptError:
 162                 usage()
 163                 return 1
 164         directory = args[0]
 165         for (o, v) in opts:
 166                 if o in ("-h", "--help"):
 167                         usage()
 168                         return 0
 169                 if o in ("-d", "--dry-run"):
 170                         opt_dryrun = True
 171                 if o in ("-w", "--whitelist"):
 172                         for i in range(0, len(blacklist)):
 173                                 (name, regex) = blacklist[i]
 174                                 if name == v:
 175                                         del blacklist[i]
 176                                         break
 177                         else:
 178                                 print "Whitelist error: Item", v,\
 179                                       "is not in blacklist"
 180                                 return 1
 181                 if o in ("-B", "--show-blacklist"):
 182                         for (name, regex) in blacklist:
 183                                 print name
 184                         return 0
 185
 186         # Create a directory listing and parse the file names.
 187         entries = []
 188         for filename in os.listdir(directory):
 189                 if filename == "." or filename == "..":
 190                         continue
 191                 for (name, regex) in blacklist:
 192                         if regex.match(filename):
 193                                 if opt_dryrun:
 194                                         print filename, "is blacklisted"
 195                                 break
 196                 else:
 197                         try:
 198                                 entries.append(Entry(directory, filename))
 199                         except (EntryParseError), e: pass
 200
 201         # Create a map of programs
 202         progmap = {}
 203         for entry in entries:
 204                 if entry.progname in progmap.keys():
 205                         progmap[entry.progname].append(entry)
 206                 else:
 207                         progmap[entry.progname] = [entry,]
 208
 209         # Traverse the program map and delete everything but the last version
 210         for prog in progmap:
 211                 lastVersion = None
 212                 versions = progmap[prog]
 213                 for version in versions:
 214                         if lastVersion is None or version >= lastVersion:
 215                                 lastVersion = version
 216                 if lastVersion:
 217                         for version in versions:
 218                                 if version != lastVersion:
 219                                         version.deleteFile()
 220                         if opt_dryrun:
 221                                 print "Keeping", lastVersion.filename
 222
 223         return 0
 224
 225 if __name__ == "__main__":
 226         sys.exit(main(sys.argv))