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| 1 | +#! /usr/bin/env python | |
| 2 | + | |
| 3 | +"""Script to synchronize two source trees. | |
| 4 | + | |
| 5 | +Invoke with two arguments: | |
| 6 | + | |
| 7 | +python treesync.py slave master | |
| 8 | + | |
| 9 | +The assumption is that "master" contains CVS administration while | |
| 10 | +slave doesn't. All files in the slave tree that have a CVS/Entries | |
| 11 | +entry in the master tree are synchronized. This means: | |
| 12 | + | |
| 13 | + If the files differ: | |
| 14 | + if the slave file is newer: | |
| 15 | + normalize the slave file | |
| 16 | + if the files still differ: | |
| 17 | + copy the slave to the master | |
| 18 | + else (the master is newer): | |
| 19 | + copy the master to the slave | |
| 20 | + | |
| 21 | + normalizing the slave means replacing CRLF with LF when the master | |
| 22 | + doesn't use CRLF | |
| 23 | + | |
| 24 | +""" | |
| 25 | + | |
| 26 | +import os, sys, stat, getopt | |
| 27 | + | |
| 28 | +# Interactivity options | |
| 29 | +default_answer = "ask" | |
| 30 | +create_files = "yes" | |
| 31 | +create_directories = "no" | |
| 32 | +write_slave = "ask" | |
| 33 | +write_master = "ask" | |
| 34 | + | |
| 35 | +def main(): | |
| 36 | + global always_no, always_yes | |
| 37 | + global create_directories, write_master, write_slave | |
| 38 | + opts, args = getopt.getopt(sys.argv[1:], "nym:s:d:f:a:") | |
| 39 | + for o, a in opts: | |
| 40 | + if o == '-y': | |
| 41 | + default_answer = "yes" | |
| 42 | + if o == '-n': | |
| 43 | + default_answer = "no" | |
| 44 | + if o == '-s': | |
| 45 | + write_slave = a | |
| 46 | + if o == '-m': | |
| 47 | + write_master = a | |
| 48 | + if o == '-d': | |
| 49 | + create_directories = a | |
| 50 | + if o == '-f': | |
| 51 | + create_files = a | |
| 52 | + if o == '-a': | |
| 53 | + create_files = create_directories = write_slave = write_master = a | |
| 54 | + try: | |
| 55 | + [slave, master] = args | |
| 56 | + except ValueError: | |
| 57 | + print "usage: python", sys.argv[0] or "treesync.py", | |
| 58 | + print "[-n] [-y] [-m y|n|a] [-s y|n|a] [-d y|n|a] [-f n|y|a]", | |
| 59 | + print "slavedir masterdir" | |
| 60 | + return | |
| 61 | + process(slave, master) | |
| 62 | + | |
| 63 | +def process(slave, master): | |
| 64 | + cvsdir = os.path.join(master, "CVS") | |
| 65 | + if not os.path.isdir(cvsdir): | |
| 66 | + print "skipping master subdirectory", master | |
| 67 | + print "-- not under CVS" | |
| 68 | + return | |
| 69 | + print "-"*40 | |
| 70 | + print "slave ", slave | |
| 71 | + print "master", master | |
| 72 | + if not os.path.isdir(slave): | |
| 73 | + if not okay("create slave directory %s?" % slave, | |
| 74 | + answer=create_directories): | |
| 75 | + print "skipping master subdirectory", master | |
| 76 | + print "-- no corresponding slave", slave | |
| 77 | + return | |
| 78 | + print "creating slave directory", slave | |
| 79 | + try: | |
| 80 | + os.mkdir(slave) | |
| 81 | + except os.error, msg: | |
| 82 | + print "can't make slave directory", slave, ":", msg | |
| 83 | + return | |
| 84 | + else: | |
| 85 | + print "made slave directory", slave | |
| 86 | + cvsdir = None | |
| 87 | + subdirs = [] | |
| 88 | + names = os.listdir(master) | |
| 89 | + for name in names: | |
| 90 | + mastername = os.path.join(master, name) | |
| 91 | + slavename = os.path.join(slave, name) | |
| 92 | + if name == "CVS": | |
| 93 | + cvsdir = mastername | |
| 94 | + else: | |
| 95 | + if os.path.isdir(mastername) and not os.path.islink(mastername): | |
| 96 | + subdirs.append((slavename, mastername)) | |
| 97 | + if cvsdir: | |
| 98 | + entries = os.path.join(cvsdir, "Entries") | |
| 99 | + for e in open(entries).readlines(): | |
| 100 | + words = e.split('/') | |
| 101 | + if words[0] == '' and words[1:]: | |
| 102 | + name = words[1] | |
| 103 | + s = os.path.join(slave, name) | |
| 104 | + m = os.path.join(master, name) | |
| 105 | + compare(s, m) | |
| 106 | + for (s, m) in subdirs: | |
| 107 | + process(s, m) | |
| 108 | + | |
| 109 | +def compare(slave, master): | |
| 110 | + try: | |
| 111 | + sf = open(slave, 'r') | |
| 112 | + except IOError: | |
| 113 | + sf = None | |
| 114 | + try: | |
| 115 | + mf = open(master, 'rb') | |
| 116 | + except IOError: | |
| 117 | + mf = None | |
| 118 | + if not sf: | |
| 119 | + if not mf: | |
| 120 | + print "Neither master nor slave exists", master | |
| 121 | + return | |
| 122 | + print "Creating missing slave", slave | |
| 123 | + copy(master, slave, answer=create_files) | |
| 124 | + return | |
| 125 | + if not mf: | |
| 126 | + print "Not updating missing master", master | |
| 127 | + return | |
| 128 | + if sf and mf: | |
| 129 | + if identical(sf, mf): | |
| 130 | + return | |
| 131 | + sft = mtime(sf) | |
| 132 | + mft = mtime(mf) | |
| 133 | + if mft > sft: | |
| 134 | + # Master is newer -- copy master to slave | |
| 135 | + sf.close() | |
| 136 | + mf.close() | |
| 137 | + print "Master ", master | |
| 138 | + print "is newer than slave", slave | |
| 139 | + copy(master, slave, answer=write_slave) | |
| 140 | + return | |
| 141 | + # Slave is newer -- copy slave to master | |
| 142 | + print "Slave is", sft-mft, "seconds newer than master" | |
| 143 | + # But first check what to do about CRLF | |
| 144 | + mf.seek(0) | |
| 145 | + fun = funnychars(mf) | |
| 146 | + mf.close() | |
| 147 | + sf.close() | |
| 148 | + if fun: | |
| 149 | + print "***UPDATING MASTER (BINARY COPY)***" | |
| 150 | + copy(slave, master, "rb", answer=write_master) | |
| 151 | + else: | |
| 152 | + print "***UPDATING MASTER***" | |
| 153 | + copy(slave, master, "r", answer=write_master) | |
| 154 | + | |
| 155 | +BUFSIZE = 16*1024 | |
| 156 | + | |
| 157 | +def identical(sf, mf): | |
| 158 | + while 1: | |
| 159 | + sd = sf.read(BUFSIZE) | |
| 160 | + md = mf.read(BUFSIZE) | |
| 161 | + if sd != md: return 0 | |
| 162 | + if not sd: break | |
| 163 | + return 1 | |
| 164 | + | |
| 165 | +def mtime(f): | |
| 166 | + st = os.fstat(f.fileno()) | |
| 167 | + return st[stat.ST_MTIME] | |
| 168 | + | |
| 169 | +def funnychars(f): | |
| 170 | + while 1: | |
| 171 | + buf = f.read(BUFSIZE) | |
| 172 | + if not buf: break | |
| 173 | + if '\r' in buf or '\0' in buf: return 1 | |
| 174 | + return 0 | |
| 175 | + | |
| 176 | +def copy(src, dst, rmode="rb", wmode="wb", answer='ask'): | |
| 177 | + print "copying", src | |
| 178 | + print " to", dst | |
| 179 | + if not okay("okay to copy? ", answer): | |
| 180 | + return | |
| 181 | + f = open(src, rmode) | |
| 182 | + g = open(dst, wmode) | |
| 183 | + while 1: | |
| 184 | + buf = f.read(BUFSIZE) | |
| 185 | + if not buf: break | |
| 186 | + g.write(buf) | |
| 187 | + f.close() | |
| 188 | + g.close() | |
| 189 | + | |
| 190 | +def okay(prompt, answer='ask'): | |
| 191 | + answer = answer.strip().lower() | |
| 192 | + if not answer or answer[0] not in 'ny': | |
| 193 | + answer = raw_input(prompt) | |
| 194 | + answer = answer.strip().lower() | |
| 195 | + if not answer: | |
| 196 | + answer = default_answer | |
| 197 | + if answer[:1] == 'y': | |
| 198 | + return 1 | |
| 199 | + if answer[:1] == 'n': | |
| 200 | + return 0 | |
| 201 | + print "Yes or No please -- try again:" | |
| 202 | + return okay(prompt) | |
| 203 | + | |
| 204 | +if __name__ == '__main__': | |
| 205 | + main() | |