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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() | ||