Mercurial > hg
annotate hgext/git/manifest.py @ 46387:c41ac8985fe4
perf: test the formatting of a command help
Since we are about to addd ':' in command name I want this covered.
Differential Revision: https://phab.mercurial-scm.org/D9871
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Mon, 25 Jan 2021 23:13:01 +0100 |
parents | 89a2afe31e82 |
children | 6000f5b25c9b |
rev | line source |
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1 from __future__ import absolute_import |
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2 |
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3 from mercurial import ( |
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4 match as matchmod, |
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5 pathutil, |
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6 pycompat, |
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7 util, |
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8 ) |
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9 from mercurial.interfaces import ( |
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10 repository, |
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11 util as interfaceutil, |
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12 ) |
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13 from . import gitutil |
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14 |
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15 |
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16 pygit2 = gitutil.get_pygit2() |
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17 |
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18 |
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19 @interfaceutil.implementer(repository.imanifestdict) |
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20 class gittreemanifest(object): |
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21 """Expose git trees (and optionally a builder's overlay) as a manifestdict. |
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22 |
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23 Very similar to mercurial.manifest.treemanifest. |
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24 """ |
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25 |
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26 def __init__(self, git_repo, root_tree, pending_changes): |
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27 """Initializer. |
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28 |
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29 Args: |
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30 git_repo: The git_repo we're walking (required to look up child |
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31 trees). |
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32 root_tree: The root Git tree object for this manifest. |
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33 pending_changes: A dict in which pending changes will be |
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34 tracked. The enclosing memgittreemanifestctx will use this to |
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35 construct any required Tree objects in Git during it's |
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36 `write()` method. |
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37 """ |
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38 self._git_repo = git_repo |
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39 self._tree = root_tree |
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40 if pending_changes is None: |
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41 pending_changes = {} |
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42 # dict of path: Optional[Tuple(node, flags)] |
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43 self._pending_changes = pending_changes |
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44 |
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45 def _resolve_entry(self, path): |
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46 """Given a path, load its node and flags, or raise KeyError if missing. |
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47 |
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48 This takes into account any pending writes in the builder. |
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49 """ |
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50 upath = pycompat.fsdecode(path) |
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51 ent = None |
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52 if path in self._pending_changes: |
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53 val = self._pending_changes[path] |
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54 if val is None: |
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55 raise KeyError |
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56 return val |
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57 t = self._tree |
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58 comps = upath.split('/') |
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59 te = self._tree |
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60 for comp in comps[:-1]: |
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61 te = te[comp] |
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62 t = self._git_repo[te.id] |
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63 ent = t[comps[-1]] |
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64 if ent.filemode == pygit2.GIT_FILEMODE_BLOB: |
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65 flags = b'' |
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66 elif ent.filemode == pygit2.GIT_FILEMODE_BLOB_EXECUTABLE: |
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67 flags = b'x' |
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68 elif ent.filemode == pygit2.GIT_FILEMODE_LINK: |
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69 flags = b'l' |
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70 else: |
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71 raise ValueError('unsupported mode %s' % oct(ent.filemode)) |
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72 return ent.id.raw, flags |
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73 |
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74 def __getitem__(self, path): |
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75 return self._resolve_entry(path)[0] |
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76 |
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77 def find(self, path): |
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78 return self._resolve_entry(path) |
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79 |
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80 def __len__(self): |
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81 return len(list(self.walk(matchmod.always()))) |
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82 |
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83 def __nonzero__(self): |
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84 try: |
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85 next(iter(self)) |
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86 return True |
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87 except StopIteration: |
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88 return False |
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89 |
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90 __bool__ = __nonzero__ |
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91 |
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92 def __contains__(self, path): |
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93 try: |
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94 self._resolve_entry(path) |
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95 return True |
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96 except KeyError: |
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97 return False |
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98 |
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99 def iterkeys(self): |
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100 return self.walk(matchmod.always()) |
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101 |
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102 def keys(self): |
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103 return list(self.iterkeys()) |
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104 |
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105 def __iter__(self): |
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106 return self.iterkeys() |
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107 |
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108 def __setitem__(self, path, node): |
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109 self._pending_changes[path] = node, self.flags(path) |
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110 |
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111 def __delitem__(self, path): |
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112 # TODO: should probably KeyError for already-deleted files? |
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113 self._pending_changes[path] = None |
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114 |
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115 def filesnotin(self, other, match=None): |
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116 if match is not None: |
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117 match = matchmod.badmatch(match, lambda path, msg: None) |
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118 sm2 = set(other.walk(match)) |
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119 return {f for f in self.walk(match) if f not in sm2} |
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120 return {f for f in self if f not in other} |
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121 |
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122 @util.propertycache |
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123 def _dirs(self): |
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124 return pathutil.dirs(self) |
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125 |
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126 def hasdir(self, dir): |
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127 return dir in self._dirs |
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128 |
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129 def diff(self, other, match=lambda x: True, clean=False): |
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130 """Finds changes between the current manifest and m2. |
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131 |
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132 The result is returned as a dict with filename as key and |
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133 values of the form ((n1,fl1),(n2,fl2)), where n1/n2 is the |
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134 nodeid in the current/other manifest and fl1/fl2 is the flag |
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135 in the current/other manifest. Where the file does not exist, |
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136 the nodeid will be None and the flags will be the empty |
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137 string. |
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138 """ |
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139 result = {} |
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140 |
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141 def _iterativediff(t1, t2, subdir): |
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142 """compares two trees and appends new tree nodes to examine to |
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143 the stack""" |
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144 if t1 is None: |
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145 t1 = {} |
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146 if t2 is None: |
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147 t2 = {} |
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148 |
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149 for e1 in t1: |
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150 realname = subdir + pycompat.fsencode(e1.name) |
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151 |
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152 if e1.type == pygit2.GIT_OBJ_TREE: |
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153 try: |
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154 e2 = t2[e1.name] |
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155 if e2.type != pygit2.GIT_OBJ_TREE: |
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156 e2 = None |
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157 except KeyError: |
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158 e2 = None |
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159 |
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160 stack.append((realname + b'/', e1, e2)) |
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161 else: |
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162 n1, fl1 = self.find(realname) |
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163 |
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164 try: |
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165 e2 = t2[e1.name] |
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166 n2, fl2 = other.find(realname) |
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167 except KeyError: |
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168 e2 = None |
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169 n2, fl2 = (None, b'') |
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170 |
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171 if e2 is not None and e2.type == pygit2.GIT_OBJ_TREE: |
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172 stack.append((realname + b'/', None, e2)) |
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173 |
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174 if not match(realname): |
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175 continue |
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176 |
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177 if n1 != n2 or fl1 != fl2: |
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178 result[realname] = ((n1, fl1), (n2, fl2)) |
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179 elif clean: |
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180 result[realname] = None |
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181 |
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182 for e2 in t2: |
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183 if e2.name in t1: |
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184 continue |
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185 |
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186 realname = subdir + pycompat.fsencode(e2.name) |
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187 |
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188 if e2.type == pygit2.GIT_OBJ_TREE: |
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189 stack.append((realname + b'/', None, e2)) |
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190 elif match(realname): |
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191 n2, fl2 = other.find(realname) |
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192 result[realname] = ((None, b''), (n2, fl2)) |
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193 |
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194 stack = [] |
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195 _iterativediff(self._tree, other._tree, b'') |
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196 while stack: |
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197 subdir, t1, t2 = stack.pop() |
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198 # stack is populated in the function call |
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199 _iterativediff(t1, t2, subdir) |
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200 |
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201 return result |
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202 |
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203 def setflag(self, path, flag): |
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204 node, unused_flag = self._resolve_entry(path) |
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205 self._pending_changes[path] = node, flag |
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206 |
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207 def get(self, path, default=None): |
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208 try: |
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209 return self._resolve_entry(path)[0] |
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210 except KeyError: |
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211 return default |
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212 |
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213 def flags(self, path): |
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214 try: |
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215 return self._resolve_entry(path)[1] |
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216 except KeyError: |
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217 return b'' |
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218 |
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219 def copy(self): |
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220 return gittreemanifest( |
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221 self._git_repo, self._tree, dict(self._pending_changes) |
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222 ) |
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223 |
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224 def items(self): |
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225 for f in self: |
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226 # TODO: build a proper iterator version of this |
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227 yield self[f] |
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228 |
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229 def iteritems(self): |
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230 return self.items() |
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231 |
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232 def iterentries(self): |
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233 for f in self: |
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234 # TODO: build a proper iterator version of this |
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235 yield self._resolve_entry(f) |
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236 |
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237 def text(self): |
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238 assert False # TODO can this method move out of the manifest iface? |
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239 |
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240 def _walkonetree(self, tree, match, subdir): |
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241 for te in tree: |
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242 # TODO: can we prune dir walks with the matcher? |
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243 realname = subdir + pycompat.fsencode(te.name) |
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244 if te.type == pygit2.GIT_OBJ_TREE: |
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245 for inner in self._walkonetree( |
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246 self._git_repo[te.id], match, realname + b'/' |
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247 ): |
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248 yield inner |
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249 elif match(realname): |
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250 yield pycompat.fsencode(realname) |
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251 |
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252 def walk(self, match): |
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253 # TODO: this is a very lazy way to merge in the pending |
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254 # changes. There is absolutely room for optimization here by |
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255 # being clever about walking over the sets... |
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256 baseline = set(self._walkonetree(self._tree, match, b'')) |
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257 deleted = {p for p, v in self._pending_changes.items() if v is None} |
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258 pend = {p for p in self._pending_changes if match(p)} |
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259 return iter(sorted((baseline | pend) - deleted)) |
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260 |
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261 |
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262 @interfaceutil.implementer(repository.imanifestrevisionstored) |
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263 class gittreemanifestctx(object): |
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264 def __init__(self, repo, gittree): |
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265 self._repo = repo |
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266 self._tree = gittree |
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267 |
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268 def read(self): |
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269 return gittreemanifest(self._repo, self._tree, None) |
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270 |
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271 def readfast(self, shallow=False): |
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272 return self.read() |
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273 |
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274 def copy(self): |
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275 # NB: it's important that we return a memgittreemanifestctx |
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276 # because the caller expects a mutable manifest. |
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277 return memgittreemanifestctx(self._repo, self._tree) |
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278 |
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279 def find(self, path): |
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280 return self.read()[path] |
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281 |
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282 |
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283 @interfaceutil.implementer(repository.imanifestrevisionwritable) |
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284 class memgittreemanifestctx(object): |
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285 def __init__(self, repo, tree): |
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286 self._repo = repo |
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287 self._tree = tree |
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288 # dict of path: Optional[Tuple(node, flags)] |
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289 self._pending_changes = {} |
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290 |
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291 def read(self): |
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292 return gittreemanifest(self._repo, self._tree, self._pending_changes) |
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293 |
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294 def copy(self): |
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295 # TODO: if we have a builder in play, what should happen here? |
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296 # Maybe we can shuffle copy() into the immutable interface. |
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297 return memgittreemanifestctx(self._repo, self._tree) |
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298 |
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299 def write(self, transaction, link, p1, p2, added, removed, match=None): |
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300 # We're not (for now, anyway) going to audit filenames, so we |
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301 # can ignore added and removed. |
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302 |
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303 # TODO what does this match argument get used for? hopefully |
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304 # just narrow? |
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305 assert not match or isinstance(match, matchmod.alwaysmatcher) |
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306 |
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307 touched_dirs = pathutil.dirs(list(self._pending_changes)) |
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308 trees = { |
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309 b'': self._tree, |
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310 } |
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311 # path: treebuilder |
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312 builders = { |
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313 b'': self._repo.TreeBuilder(self._tree), |
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314 } |
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315 # get a TreeBuilder for every tree in the touched_dirs set |
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316 for d in sorted(touched_dirs, key=lambda x: (len(x), x)): |
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317 if d == b'': |
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318 # loaded root tree above |
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319 continue |
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320 comps = d.split(b'/') |
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321 full = b'' |
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322 for part in comps: |
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323 parent = trees[full] |
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324 try: |
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325 parent_tree_id = parent[pycompat.fsdecode(part)].id |
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326 new = self._repo[parent_tree_id] |
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327 except KeyError: |
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328 # new directory |
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329 new = None |
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330 full += b'/' + part |
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331 if new is not None: |
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332 # existing directory |
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333 trees[full] = new |
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334 builders[full] = self._repo.TreeBuilder(new) |
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335 else: |
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336 # new directory, use an empty dict to easily |
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337 # generate KeyError as any nested new dirs get |
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338 # created. |
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339 trees[full] = {} |
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340 builders[full] = self._repo.TreeBuilder() |
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341 for f, info in self._pending_changes.items(): |
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342 if b'/' not in f: |
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343 dirname = b'' |
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344 basename = f |
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345 else: |
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346 dirname, basename = f.rsplit(b'/', 1) |
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347 dirname = b'/' + dirname |
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348 if info is None: |
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349 builders[dirname].remove(pycompat.fsdecode(basename)) |
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350 else: |
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351 n, fl = info |
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352 mode = { |
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353 b'': pygit2.GIT_FILEMODE_BLOB, |
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354 b'x': pygit2.GIT_FILEMODE_BLOB_EXECUTABLE, |
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355 b'l': pygit2.GIT_FILEMODE_LINK, |
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356 }[fl] |
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357 builders[dirname].insert( |
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358 pycompat.fsdecode(basename), gitutil.togitnode(n), mode |
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359 ) |
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360 # This visits the buffered TreeBuilders in deepest-first |
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git: skeleton of a new extension to _directly_ operate on git repos
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361 # order, bubbling up the edits. |
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git: skeleton of a new extension to _directly_ operate on git repos
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362 for b in sorted(builders, key=len, reverse=True): |
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git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
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363 if b == b'': |
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git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
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364 break |
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git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
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365 cb = builders[b] |
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git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
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366 dn, bn = b.rsplit(b'/', 1) |
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git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
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367 builders[dn].insert( |
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git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
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368 pycompat.fsdecode(bn), cb.write(), pygit2.GIT_FILEMODE_TREE |
ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
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changeset
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369 ) |
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git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
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changeset
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370 return builders[b''].write().raw |