scripts/dl_cleanup.py

   1 #!/usr/bin/env python3
   2 """
   3 # OpenWrt download directory cleanup utility.
   4 # Delete all but the very last version of the program tarballs.
   5 #
   6 # Copyright (C) 2010-2015 Michael Buesch <m@bues.ch>
   7 # Copyright (C) 2013-2015 OpenWrt.org
   8 """
   9
  10 from __future__ import print_function
  11
  12 import sys
  13 import os
  14 import re
  15 import getopt
  16
  17 # Commandline options
  18 opt_dryrun = False
  19
  20
  21 def parseVer_1234(match, filepath):
  22         progname = match.group(1)
  23         progversion = (int(match.group(2)) << 64) |\
  24                       (int(match.group(3)) << 48) |\
  25                       (int(match.group(4)) << 32) |\
  26                       (int(match.group(5)) << 16)
  27         return (progname, progversion)
  28
  29 def parseVer_123(match, filepath):
  30         progname = match.group(1)
  31         try:
  32                 patchlevel = match.group(5)
  33         except IndexError as e:
  34                 patchlevel = None
  35         if patchlevel:
  36                 patchlevel = ord(patchlevel[0])
  37         else:
  38                 patchlevel = 0
  39         progversion = (int(match.group(2)) << 64) |\
  40                       (int(match.group(3)) << 48) |\
  41                       (int(match.group(4)) << 32) |\
  42                       patchlevel
  43         return (progname, progversion)
  44
  45 def parseVer_12(match, filepath):
  46         progname = match.group(1)
  47         try:
  48                 patchlevel = match.group(4)
  49         except IndexError as e:
  50                 patchlevel = None
  51         if patchlevel:
  52                 patchlevel = ord(patchlevel[0])
  53         else:
  54                 patchlevel = 0
  55         progversion = (int(match.group(2)) << 64) |\
  56                       (int(match.group(3)) << 48) |\
  57                       patchlevel
  58         return (progname, progversion)
  59
  60 def parseVer_r(match, filepath):
  61         progname = match.group(1)
  62         progversion = (int(match.group(2)) << 64)
  63         return (progname, progversion)
  64
  65 def parseVer_ymd(match, filepath):
  66         progname = match.group(1)
  67         progversion = (int(match.group(2)) << 64) |\
  68                       (int(match.group(3)) << 48) |\
  69                       (int(match.group(4)) << 32)
  70         return (progname, progversion)
  71
  72 def parseVer_GIT(match, filepath):
  73         progname = match.group(1)
  74         st = os.stat(filepath)
  75         progversion = int(st.st_mtime) << 64
  76         return (progname, progversion)
  77
  78 extensions = (
  79         ".tar.gz",
  80         ".tar.bz2",
  81         ".tar.xz",
  82         ".orig.tar.gz",
  83         ".orig.tar.bz2",
  84         ".orig.tar.xz",
  85         ".zip",
  86         ".tgz",
  87         ".tbz",
  88         ".txz",
  89 )
  90
  91 versionRegex = (
  92         (re.compile(r"(.+)[-_](\d+)\.(\d+)\.(\d+)\.(\d+)"), parseVer_1234),     # xxx-1.2.3.4
  93         (re.compile(r"(.+)[-_](\d\d\d\d)-?(\d\d)-?(\d\d)"), parseVer_ymd),      # xxx-YYYY-MM-DD
  94         (re.compile(r"(.+)[-_]([0-9a-fA-F]{40,40})"), parseVer_GIT),            # xxx-GIT_SHASUM
  95         (re.compile(r"(.+)[-_](\d+)\.(\d+)\.(\d+)(\w?)"), parseVer_123),        # xxx-1.2.3a
  96         (re.compile(r"(.+)[-_](\d+)_(\d+)_(\d+)"), parseVer_123),               # xxx-1_2_3
  97         (re.compile(r"(.+)[-_](\d+)\.(\d+)(\w?)"), parseVer_12),                # xxx-1.2a
  98         (re.compile(r"(.+)[-_]r?(\d+)"), parseVer_r),                           # xxx-r1111
  99 )
 100
 101 blacklist = [
 102         ("linux",               re.compile(r"linux-\d.*")),
 103         ("gcc",                 re.compile(r"gcc-.*")),
 104         ("wl_apsta",            re.compile(r"wl_apsta.*")),
 105         (".fw",                 re.compile(r".*\.fw")),
 106         (".arm",                re.compile(r".*\.arm")),
 107         (".bin",                re.compile(r".*\.bin")),
 108         ("rt-firmware",         re.compile(r"RT[\d\w]+_Firmware.*")),
 109 ]
 110
 111 class EntryParseError(Exception): pass
 112
 113 class Entry:
 114         def __init__(self, directory, filename):
 115                 self.directory = directory
 116                 self.filename = filename
 117                 self.progname = ""
 118                 self.fileext = ""
 119
 120                 for ext in extensions:
 121                         if filename.endswith(ext):
 122                                 filename = filename[0:0-len(ext)]
 123                                 self.fileext = ext
 124                                 break
 125                 else:
 126                         print(self.filename, "has an unknown file-extension")
 127                         raise EntryParseError("ext")
 128                 for (regex, parseVersion) in versionRegex:
 129                         match = regex.match(filename)
 130                         if match:
 131                                 (self.progname, self.version) = parseVersion(
 132                                         match, directory + "/" + filename + self.fileext)
 133                                 break
 134                 else:
 135                         print(self.filename, "has an unknown version pattern")
 136                         raise EntryParseError("ver")
 137
 138         def getPath(self):
 139                 return (self.directory + "/" + self.filename).replace("//", "/")
 140
 141         def deleteFile(self):
 142                 path = self.getPath()
 143                 print("Deleting", path)
 144                 if not opt_dryrun:
 145                         os.unlink(path)
 146
 147         def __ge__(self, y):
 148                 return self.version >= y.version
 149
 150 def usage():
 151         print("OpenWrt download directory cleanup utility")
 152         print("Usage: " + sys.argv[0] + " [OPTIONS] <path/to/dl>")
 153         print("")
 154         print(" -d|--dry-run            Do a dry-run. Don't delete any files")
 155         print(" -B|--show-blacklist     Show the blacklist and exit")
 156         print(" -w|--whitelist ITEM     Remove ITEM from blacklist")
 157
 158 def main(argv):
 159         global opt_dryrun
 160
 161         try:
 162                 (opts, args) = getopt.getopt(argv[1:],
 163                         "hdBw:",
 164                         [ "help", "dry-run", "show-blacklist", "whitelist=", ])
 165                 if len(args) != 1:
 166                         usage()
 167                         return 1
 168         except getopt.GetoptError as e:
 169                 usage()
 170                 return 1
 171         directory = args[0]
 172         for (o, v) in opts:
 173                 if o in ("-h", "--help"):
 174                         usage()
 175                         return 0
 176                 if o in ("-d", "--dry-run"):
 177                         opt_dryrun = True
 178                 if o in ("-w", "--whitelist"):
 179                         for i in range(0, len(blacklist)):
 180                                 (name, regex) = blacklist[i]
 181                                 if name == v:
 182                                         del blacklist[i]
 183                                         break
 184                         else:
 185                                 print("Whitelist error: Item", v,\
 186                                       "is not in blacklist")
 187                                 return 1
 188                 if o in ("-B", "--show-blacklist"):
 189                         for (name, regex) in blacklist:
 190                                 sep = "\t\t"
 191                                 if len(name) >= 8:
 192                                         sep = "\t"
 193                                 print("%s%s(%s)" % (name, sep, regex.pattern))
 194                         return 0
 195
 196         # Create a directory listing and parse the file names.
 197         entries = []
 198         for filename in os.listdir(directory):
 199                 if filename == "." or filename == "..":
 200                         continue
 201                 for (name, regex) in blacklist:
 202                         if regex.match(filename):
 203                                 if opt_dryrun:
 204                                         print(filename, "is blacklisted")
 205                                 break
 206                 else:
 207                         try:
 208                                 entries.append(Entry(directory, filename))
 209                         except EntryParseError as e:
 210                                 pass
 211
 212         # Create a map of programs
 213         progmap = {}
 214         for entry in entries:
 215                 if entry.progname in progmap.keys():
 216                         progmap[entry.progname].append(entry)
 217                 else:
 218                         progmap[entry.progname] = [entry,]
 219
 220         # Traverse the program map and delete everything but the last version
 221         for prog in progmap:
 222                 lastVersion = None
 223                 versions = progmap[prog]
 224                 for version in versions:
 225                         if lastVersion is None or version >= lastVersion:
 226                                 lastVersion = version
 227                 if lastVersion:
 228                         for version in versions:
 229                                 if version is not lastVersion:
 230                                         version.deleteFile()
 231                         if opt_dryrun:
 232                                 print("Keeping", lastVersion.getPath())
 233
 234         return 0
 235
 236 if __name__ == "__main__":
 237         sys.exit(main(sys.argv))