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annotate mercurial/store.py @ 6840:80e51429cb9a

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introduce store classes move store walking from streamclone.py into store.py
author Adrian Buehlmann <adrian@cadifra.com>
date Thu, 24 Jul 2008 16:32:52 +0200
parents 01db3e101362
children fddef0602859
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01db3e101362 move filename encoding functions from util.py to new store.py
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1 # store.py - repository store handling for Mercurial
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2 #
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3 # Copyright 2008 Matt Mackall <mpm@selenic.com>
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4 #
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5 # This software may be used and distributed according to the terms
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6 # of the GNU General Public License, incorporated herein by reference.
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7
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8 import os, stat, osutil, util
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9
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10 def _buildencodefun():
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11 e = '_'
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12 win_reserved = [ord(x) for x in '\\:*?"<>|']
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13 cmap = dict([ (chr(x), chr(x)) for x in xrange(127) ])
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14 for x in (range(32) + range(126, 256) + win_reserved):
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15 cmap[chr(x)] = "~%02x" % x
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16 for x in range(ord("A"), ord("Z")+1) + [ord(e)]:
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17 cmap[chr(x)] = e + chr(x).lower()
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18 dmap = {}
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19 for k, v in cmap.iteritems():
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20 dmap[v] = k
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21 def decode(s):
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22 i = 0
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23 while i < len(s):
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24 for l in xrange(1, 4):
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25 try:
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26 yield dmap[s[i:i+l]]
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27 i += l
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28 break
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29 except KeyError:
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30 pass
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31 else:
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32 raise KeyError
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33 return (lambda s: "".join([cmap[c] for c in s]),
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34 lambda s: "".join(list(decode(s))))
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35
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36 encodefilename, decodefilename = _buildencodefun()
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37
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38 def _dirwalk(path, recurse):
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39 '''yields (filename, size)'''
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40 for e, kind, st in osutil.listdir(path, stat=True):
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41 pe = os.path.join(path, e)
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42 if kind == stat.S_IFDIR:
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43 if recurse:
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44 for x in _dirwalk(pe, True):
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45 yield x
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46 elif kind == stat.S_IFREG:
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47 yield pe, st.st_size
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48
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49 class _store:
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50 '''base class for local repository stores'''
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51 def __init__(self, path):
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52 self.path = path
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53 try:
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54 # files in .hg/ will be created using this mode
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55 mode = os.stat(self.path).st_mode
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56 # avoid some useless chmods
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57 if (0777 & ~util._umask) == (0777 & mode):
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58 mode = None
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59 except OSError:
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60 mode = None
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61 self.createmode = mode
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62
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63 def join(self, f):
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64 return os.path.join(self.path, f)
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65
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66 def _revlogfiles(self, relpath='', recurse=False):
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67 '''yields (filename, size)'''
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68 if relpath:
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69 path = os.path.join(self.path, relpath)
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70 else:
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71 path = self.path
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72 striplen = len(self.path) + len(os.sep)
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73 filetypes = ('.d', '.i')
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74 for f, size in _dirwalk(path, recurse):
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75 if (len(f) > 2) and f[-2:] in filetypes:
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76 yield util.pconvert(f[striplen:]), size
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77
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78 def _datafiles(self):
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79 for x in self._revlogfiles('data', True):
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80 yield x
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81
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82 def walk(self):
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83 '''yields (direncoded filename, size)'''
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84 # yield data files first
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85 for x in self._datafiles():
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86 yield x
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87 # yield manifest before changelog
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88 meta = util.sort(self._revlogfiles())
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89 meta.reverse()
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90 for x in meta:
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91 yield x
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92
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93 class directstore(_store):
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94 def __init__(self, path):
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95 _store.__init__(self, path)
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96 self.encodefn = lambda x: x
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97 self.opener = util.opener(self.path)
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98 self.opener.createmode = self.createmode
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99
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100 class encodedstore(_store):
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101 def __init__(self, path):
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102 _store.__init__(self, os.path.join(path, 'store'))
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103 self.encodefn = encodefilename
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104 op = util.opener(self.path)
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105 op.createmode = self.createmode
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106 self.opener = lambda f, *args, **kw: op(self.encodefn(f), *args, **kw)
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107
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108 def _datafiles(self):
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109 for f, size in self._revlogfiles('data', True):
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110 yield decodefilename(f), size
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111
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112 def join(self, f):
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113 return os.path.join(self.path, self.encodefn(f))
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114
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115 def encodefn(requirements):
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116 if 'store' not in requirements:
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117 return lambda x: x
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118 else:
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119 return encodefilename
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120
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121 def store(requirements, path):
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122 if 'store' not in requirements:
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123 return directstore(path)
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124 else:
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125 return encodedstore(path)