summaryrefslogtreecommitdiffstats
path: root/Tools/scripts/treesync.py
blob: 1064ab7b85e48291eb539349ac39d415aef3f1d5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
#! /usr/bin/env python

"""Script to synchronize two source trees.

Invoke with two arguments:

python treesync.py slave master

The assumption is that "master" contains CVS administration while
slave doesn't.  All files in the slave tree that have a CVS/Entries
entry in the master tree are synchronized.  This means:

    If the files differ:
        if the slave file is newer:
            normalize the slave file
            if the files still differ:
                copy the slave to the master
        else (the master is newer):
            copy the master to the slave

    normalizing the slave means replacing CRLF with LF when the master
    doesn't use CRLF

"""

import os, sys, stat, getopt

# Interactivity options
default_answer = "ask"
create_files = "yes"
create_directories = "no"
write_slave = "ask"
write_master = "ask"

def main():
    global always_no, always_yes
    global create_directories, write_master, write_slave
    opts, args = getopt.getopt(sys.argv[1:], "nym:s:d:f:a:")
    for o, a in opts:
        if o == '-y':
            default_answer = "yes"
        if o == '-n':
            default_answer = "no"
        if o == '-s':
            write_slave = a
        if o == '-m':
            write_master = a
        if o == '-d':
            create_directories = a
        if o == '-f':
            create_files = a
        if o == '-a':
            create_files = create_directories = write_slave = write_master = a
    try:
        [slave, master] = args
    except ValueError:
        print "usage: python", sys.argv[0] or "treesync.py",
        print "[-n] [-y] [-m y|n|a] [-s y|n|a] [-d y|n|a] [-f n|y|a]",
        print "slavedir masterdir"
        return
    process(slave, master)

def process(slave, master):
    cvsdir = os.path.join(master, "CVS")
    if not os.path.isdir(cvsdir):
        print "skipping master subdirectory", master
        print "-- not under CVS"
        return
    print "-"*40
    print "slave ", slave
    print "master", master
    if not os.path.isdir(slave):
        if not okay("create slave directory %s?" % slave,
                    answer=create_directories):
            print "skipping master subdirectory", master
            print "-- no corresponding slave", slave
            return
        print "creating slave directory", slave
        try:
            os.mkdir(slave)
        except os.error, msg:
            print "can't make slave directory", slave, ":", msg
            return
        else:
            print "made slave directory", slave
    cvsdir = None
    subdirs = []
    names = os.listdir(master)
    for name in names:
        mastername = os.path.join(master, name)
        slavename = os.path.join(slave, name)
        if name == "CVS":
            cvsdir = mastername
        else:
            if os.path.isdir(mastername) and not os.path.islink(mastername):
                subdirs.append((slavename, mastername))
    if cvsdir:
        entries = os.path.join(cvsdir, "Entries")
        for e in open(entries).readlines():
            words = e.split('/')
            if words[0] == '' and words[1:]:
                name = words[1]
                s = os.path.join(slave, name)
                m = os.path.join(master, name)
                compare(s, m)
    for (s, m) in subdirs:
        process(s, m)

def compare(slave, master):
    try:
        sf = open(slave, 'r')
    except IOError:
        sf = None
    try:
        mf = open(master, 'rb')
    except IOError:
        mf = None
    if not sf:
        if not mf:
            print "Neither master nor slave exists", master
            return
        print "Creating missing slave", slave
        copy(master, slave, answer=create_files)
        return
    if not mf:
        print "Not updating missing master", master
        return
    if sf and mf:
        if identical(sf, mf):
            return
    sft = mtime(sf)
    mft = mtime(mf)
    if mft > sft:
        # Master is newer -- copy master to slave
        sf.close()
        mf.close()
        print "Master             ", master
        print "is newer than slave", slave
        copy(master, slave, answer=write_slave)
        return
    # Slave is newer -- copy slave to master
    print "Slave is", sft-mft, "seconds newer than master"
    # But first check what to do about CRLF
    mf.seek(0)
    fun = funnychars(mf)
    mf.close()
    sf.close()
    if fun:
        print "***UPDATING MASTER (BINARY COPY)***"
        copy(slave, master, "rb", answer=write_master)
    else:
        print "***UPDATING MASTER***"
        copy(slave, master, "r", answer=write_master)

BUFSIZE = 16*1024

def identical(sf, mf):
    while 1:
        sd = sf.read(BUFSIZE)
        md = mf.read(BUFSIZE)
        if sd != md: return 0
        if not sd: break
    return 1

def mtime(f):
    st = os.fstat(f.fileno())
    return st[stat.ST_MTIME]

def funnychars(f):
    while 1:
        buf = f.read(BUFSIZE)
        if not buf: break
        if '\r' in buf or '\0' in buf: return 1
    return 0

def copy(src, dst, rmode="rb", wmode="wb", answer='ask'):
    print "copying", src
    print "     to", dst
    if not okay("okay to copy? ", answer):
        return
    f = open(src, rmode)
    g = open(dst, wmode)
    while 1:
        buf = f.read(BUFSIZE)
        if not buf: break
        g.write(buf)
    f.close()
    g.close()

def okay(prompt, answer='ask'):
    answer = answer.strip().lower()
    if not answer or answer[0] not in 'ny':
        answer = raw_input(prompt)
        answer = answer.strip().lower()
        if not answer:
            answer = default_answer
    if answer[:1] == 'y':
        return 1
    if answer[:1] == 'n':
        return 0
    print "Yes or No please -- try again:"
    return okay(prompt)

main()