Root/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
9import sys
10import os
11import re
12import getopt
13
14# Commandline options
15opt_dryrun = False
16
17
18def 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
26def 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
42def 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
57def parseVer_r(match, filepath):
58    progname = match.group(1)
59    progversion = (int(match.group(2)) << 64)
60    return (progname, progversion)
61
62def 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
69def 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
75extensions = (
76    ".tar.gz",
77    ".tar.bz2",
78    ".orig.tar.gz",
79    ".orig.tar.bz2",
80    ".zip",
81    ".tgz",
82    ".tbz",
83)
84
85versionRegex = (
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
95blacklist = [
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
105class EntryParseError(Exception): pass
106
107class 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
144def 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
152def 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            usage()
161            return 1
162    except getopt.GetoptError:
163        usage()
164        return 1
165    directory = args[0]
166    for (o, v) in opts:
167        if o in ("-h", "--help"):
168            usage()
169            return 0
170        if o in ("-d", "--dry-run"):
171            opt_dryrun = True
172        if o in ("-w", "--whitelist"):
173            for i in range(0, len(blacklist)):
174                (name, regex) = blacklist[i]
175                if name == v:
176                    del blacklist[i]
177                    break
178            else:
179                print "Whitelist error: Item", v,\
180                      "is not in blacklist"
181                return 1
182        if o in ("-B", "--show-blacklist"):
183            for (name, regex) in blacklist:
184                print name
185            return 0
186
187    # Create a directory listing and parse the file names.
188    entries = []
189    for filename in os.listdir(directory):
190        if filename == "." or filename == "..":
191            continue
192        for (name, regex) in blacklist:
193            if regex.match(filename):
194                if opt_dryrun:
195                    print filename, "is blacklisted"
196                break
197        else:
198            try:
199                entries.append(Entry(directory, filename))
200            except (EntryParseError), e: pass
201
202    # Create a map of programs
203    progmap = {}
204    for entry in entries:
205        if entry.progname in progmap.keys():
206            progmap[entry.progname].append(entry)
207        else:
208            progmap[entry.progname] = [entry,]
209
210    # Traverse the program map and delete everything but the last version
211    for prog in progmap:
212        lastVersion = None
213        versions = progmap[prog]
214        for version in versions:
215            if lastVersion is None or version >= lastVersion:
216                lastVersion = version
217        if lastVersion:
218            for version in versions:
219                if version != lastVersion:
220                    version.deleteFile()
221            if opt_dryrun:
222                print "Keeping", lastVersion.filename
223
224    return 0
225
226if __name__ == "__main__":
227    sys.exit(main(sys.argv))
228

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