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annotate hgext/git/dirstate.py @ 44477:ad718271a9eb

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git: skeleton of a new extension to _directly_ operate on git repos This is based in part of work I did years ago in hgit, but it's mostly new code since I'm using pygit2 instead of dulwich and the hg storage interfaces have improved. Some cleanup of old hgit code by Pulkit, which I greatly appreciate. test-git-interop.t does not cover a whole lot of cases, but it passes. It includes status, diff, making a new commit, and `hg annotate` working on the git repository. This is _not_ (yet) production quality code: this is an experiment. Known technical debt lurking in this implementation: * Writing bookmarks just totally ignores transactions. * The way progress is threaded down into the gitstore is awful. * Ideally we'd find a way to incrementally reindex DAGs. I'm not sure how to do that efficiently, so we might need a "known only fast-forwards" mode on the DAG indexer for use on `hg commit` and friends. * We don't even _try_ to do anything reasonable for `hg pull` or `hg push`. * Mercurial need an interface for the changelog type. Tests currently require git 2.24 as far as I'm aware: `git status` has some changed output that I didn't try and handle in a compatible way. This patch has produced some interesting cleanups, most recently on the manifest type. I expect continuing down this road will produce other meritorious cleanups throughout our code. Differential Revision: https://phab.mercurial-scm.org/D6734
author Augie Fackler <augie@google.com>
date Tue, 11 Feb 2020 00:44:59 -0500
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children ec54b3d2af0b
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44477
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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1 from __future__ import absolute_import
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2
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3 import contextlib
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4 import errno
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5 import os
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6
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7 import pygit2
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8
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9 from mercurial import (
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10 error,
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11 extensions,
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12 match as matchmod,
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13 node as nodemod,
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14 pycompat,
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15 scmutil,
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16 util,
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17 )
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18 from mercurial.interfaces import (
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19 dirstate as intdirstate,
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20 util as interfaceutil,
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21 )
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22
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23 from . import gitutil
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24
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25
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26 def readpatternfile(orig, filepath, warn, sourceinfo=False):
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27 if not (b'info/exclude' in filepath or filepath.endswith(b'.gitignore')):
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28 return orig(filepath, warn, sourceinfo=False)
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29 result = []
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30 warnings = []
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31 with open(filepath, b'rb') as fp:
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32 for l in fp:
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33 l = l.strip()
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34 if not l or l.startswith(b'#'):
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35 continue
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36 if l.startswith(b'!'):
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37 warnings.append(b'unsupported ignore pattern %s' % l)
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38 continue
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39 if l.startswith(b'/'):
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40 result.append(b'rootglob:' + l[1:])
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41 else:
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42 result.append(b'relglob:' + l)
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43 return result, warnings
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44
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45
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46 extensions.wrapfunction(matchmod, b'readpatternfile', readpatternfile)
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47
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48
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49 _STATUS_MAP = {
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50 pygit2.GIT_STATUS_CONFLICTED: b'm',
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51 pygit2.GIT_STATUS_CURRENT: b'n',
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52 pygit2.GIT_STATUS_IGNORED: b'?',
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53 pygit2.GIT_STATUS_INDEX_DELETED: b'r',
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54 pygit2.GIT_STATUS_INDEX_MODIFIED: b'n',
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55 pygit2.GIT_STATUS_INDEX_NEW: b'a',
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56 pygit2.GIT_STATUS_INDEX_RENAMED: b'a',
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57 pygit2.GIT_STATUS_INDEX_TYPECHANGE: b'n',
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58 pygit2.GIT_STATUS_WT_DELETED: b'r',
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59 pygit2.GIT_STATUS_WT_MODIFIED: b'n',
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60 pygit2.GIT_STATUS_WT_NEW: b'?',
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61 pygit2.GIT_STATUS_WT_RENAMED: b'a',
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62 pygit2.GIT_STATUS_WT_TYPECHANGE: b'n',
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63 pygit2.GIT_STATUS_WT_UNREADABLE: b'?',
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64 pygit2.GIT_STATUS_INDEX_MODIFIED | pygit2.GIT_STATUS_WT_MODIFIED: 'm',
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65 }
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66
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67
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68 @interfaceutil.implementer(intdirstate.idirstate)
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69 class gitdirstate(object):
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70 def __init__(self, ui, root, gitrepo):
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71 self._ui = ui
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72 self._root = os.path.dirname(root)
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73 self.git = gitrepo
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74 self._plchangecallbacks = {}
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75
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76 def p1(self):
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77 return self.git.head.peel().id.raw
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78
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79 def p2(self):
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80 # TODO: MERGE_HEAD? something like that, right?
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81 return nodemod.nullid
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82
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83 def setparents(self, p1, p2=nodemod.nullid):
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84 assert p2 == nodemod.nullid, b'TODO merging support'
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85 self.git.head.set_target(gitutil.togitnode(p1))
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86
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87 @util.propertycache
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88 def identity(self):
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89 return util.filestat.frompath(
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90 os.path.join(self._root, b'.git', b'index')
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91 )
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92
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93 def branch(self):
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94 return b'default'
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95
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96 def parents(self):
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97 # TODO how on earth do we find p2 if a merge is in flight?
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98 return self.p1(), nodemod.nullid
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99
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100 def __iter__(self):
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101 return (pycompat.fsencode(f.path) for f in self.git.index)
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102
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103 def items(self):
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104 for ie in self.git.index:
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105 yield ie.path, None # value should be a dirstatetuple
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106
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107 # py2,3 compat forward
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108 iteritems = items
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109
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110 def __getitem__(self, filename):
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111 try:
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112 gs = self.git.status_file(filename)
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113 except KeyError:
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114 return b'?'
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115 return _STATUS_MAP[gs]
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116
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117 def __contains__(self, filename):
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118 try:
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119 gs = self.git.status_file(filename)
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120 return _STATUS_MAP[gs] != b'?'
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121 except KeyError:
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122 return False
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123
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124 def status(self, match, subrepos, ignored, clean, unknown):
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125 # TODO handling of clean files - can we get that from git.status()?
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126 modified, added, removed, deleted, unknown, ignored, clean = (
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127 [],
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128 [],
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129 [],
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130 [],
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131 [],
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
132 [],
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
133 [],
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
134 )
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
135 gstatus = self.git.status()
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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diff changeset
136 for path, status in gstatus.items():
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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diff changeset
137 path = pycompat.fsencode(path)
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diff changeset
138 if status == pygit2.GIT_STATUS_IGNORED:
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parents:
diff changeset
139 if path.endswith(b'/'):
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
140 continue
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
141 ignored.append(path)
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parents:
diff changeset
142 elif status in (
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
143 pygit2.GIT_STATUS_WT_MODIFIED,
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diff changeset
144 pygit2.GIT_STATUS_INDEX_MODIFIED,
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diff changeset
145 pygit2.GIT_STATUS_WT_MODIFIED
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diff changeset
146 | pygit2.GIT_STATUS_INDEX_MODIFIED,
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
147 ):
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diff changeset
148 modified.append(path)
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diff changeset
149 elif status == pygit2.GIT_STATUS_INDEX_NEW:
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diff changeset
150 added.append(path)
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parents:
diff changeset
151 elif status == pygit2.GIT_STATUS_WT_NEW:
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diff changeset
152 unknown.append(path)
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parents:
diff changeset
153 elif status == pygit2.GIT_STATUS_WT_DELETED:
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diff changeset
154 deleted.append(path)
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diff changeset
155 elif status == pygit2.GIT_STATUS_INDEX_DELETED:
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diff changeset
156 removed.append(path)
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diff changeset
157 else:
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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diff changeset
158 raise error.Abort(
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
159 b'unhandled case: status for %r is %r' % (path, status)
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
160 )
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
161
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
162 # TODO are we really always sure of status here?
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Augie Fackler <augie@google.com>
parents:
diff changeset
163 return (
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
164 False,
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parents:
diff changeset
165 scmutil.status(
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parents:
diff changeset
166 modified, added, removed, deleted, unknown, ignored, clean
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
167 ),
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
168 )
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
169
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parents:
diff changeset
170 def flagfunc(self, buildfallback):
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parents:
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171 # TODO we can do better
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parents:
diff changeset
172 return buildfallback()
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parents:
diff changeset
173
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diff changeset
174 def getcwd(self):
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175 # TODO is this a good way to do this?
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diff changeset
176 return os.path.dirname(
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diff changeset
177 os.path.dirname(pycompat.fsencode(self.git.path))
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parents:
diff changeset
178 )
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
179
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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diff changeset
180 def normalize(self, path):
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181 normed = util.normcase(path)
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
182 assert normed == path, b"TODO handling of case folding: %s != %s" % (
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
183 normed,
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
184 path,
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
185 )
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
186 return path
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
187
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
188 @property
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diff changeset
189 def _checklink(self):
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diff changeset
190 return util.checklink(os.path.dirname(pycompat.fsencode(self.git.path)))
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
191
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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diff changeset
192 def copies(self):
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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diff changeset
193 # TODO support copies?
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
194 return {}
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
195
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
196 # # TODO what the heck is this
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diff changeset
197 _filecache = set()
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
198
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
199 def pendingparentchange(self):
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diff changeset
200 # TODO: we need to implement the context manager bits and
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
201 # correctly stage/revert index edits.
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parents:
diff changeset
202 return False
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
203
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
204 def write(self, tr):
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
205 # TODO: call parent change callbacks
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
206
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
207 if tr:
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
208
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
209 def writeinner(category):
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
210 self.git.index.write()
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
211
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
212 tr.addpending(b'gitdirstate', writeinner)
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
213 else:
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
214 self.git.index.write()
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
215
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
216 def pathto(self, f, cwd=None):
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
217 if cwd is None:
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
218 cwd = self.getcwd()
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
219 # TODO core dirstate does something about slashes here
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
220 assert isinstance(f, bytes)
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
221 r = util.pathto(self._root, cwd, f)
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
222 return r
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
223
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
224 def matches(self, match):
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
225 for x in self.git.index:
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
226 p = pycompat.fsencode(x.path)
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
227 if match(p):
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
228 yield p
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
229
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
230 def normal(self, f, parentfiledata=None):
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
231 """Mark a file normal and clean."""
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
232 # TODO: for now we just let libgit2 re-stat the file. We can
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
233 # clearly do better.
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
234
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
235 def normallookup(self, f):
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
236 """Mark a file normal, but possibly dirty."""
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
237 # TODO: for now we just let libgit2 re-stat the file. We can
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
238 # clearly do better.
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
239
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
240 def walk(self, match, subrepos, unknown, ignored, full=True):
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
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parents:
diff changeset
241 # TODO: we need to use .status() and not iterate the index,
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
242 # because the index doesn't force a re-walk and so `hg add` of
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
243 # a new file without an intervening call to status will
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
244 # silently do nothing.
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
245 r = {}
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
246 cwd = self.getcwd()
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
247 for path, status in self.git.status().items():
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
248 if path.startswith('.hg/'):
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
249 continue
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
250 path = pycompat.fsencode(path)
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
251 if not match(path):
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
252 continue
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
253 # TODO construct the stat info from the status object?
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
254 try:
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
255 s = os.stat(os.path.join(cwd, path))
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
256 except OSError as e:
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
257 if e.errno != errno.ENOENT:
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
258 raise
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
259 continue
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
260 r[path] = s
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
261 return r
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
262
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
263 def savebackup(self, tr, backupname):
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
264 # TODO: figure out a strategy for saving index backups.
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
265 pass
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
266
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
267 def restorebackup(self, tr, backupname):
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
268 # TODO: figure out a strategy for saving index backups.
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
269 pass
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
270
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff changeset
271 def add(self, f):
ad718271a9eb git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
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272 self.git.index.add(pycompat.fsdecode(f))
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273
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274 def drop(self, f):
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275 self.git.index.remove(pycompat.fsdecode(f))
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276
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277 def remove(self, f):
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278 self.git.index.remove(pycompat.fsdecode(f))
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279
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280 def copied(self, path):
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281 # TODO: track copies?
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282 return None
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283
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284 @contextlib.contextmanager
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285 def parentchange(self):
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286 # TODO: track this maybe?
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287 yield
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288
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289 def addparentchangecallback(self, category, callback):
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290 # TODO: should this be added to the dirstate interface?
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291 self._plchangecallbacks[category] = callback
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292
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293 def clearbackup(self, tr, backupname):
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294 # TODO
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295 pass