author | Gregory Szorc <gregory.szorc@gmail.com> |
Thu, 06 Jul 2017 14:33:18 -0700 | |
changeset 33321 | d09e948dc303 |
parent 33320 | 153456f02426 |
child 33322 | fa6c2c3064fd |
permissions | -rw-r--r-- |
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# sparse.py - functionality for sparse checkouts |
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# |
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# Copyright 2014 Facebook, Inc. |
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# |
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# This software may be used and distributed according to the terms of the |
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# GNU General Public License version 2 or any later version. |
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|
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from __future__ import absolute_import |
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import collections |
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import hashlib |
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import os |
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from .i18n import _ |
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from .node import nullid |
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from . import ( |
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error, |
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match as matchmod, |
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merge as mergemod, |
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pycompat, |
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) |
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# Whether sparse features are enabled. This variable is intended to be |
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# temporary to facilitate porting sparse to core. It should eventually be |
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# a per-repo option, possibly a repo requirement. |
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enabled = False |
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def parseconfig(ui, raw): |
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"""Parse sparse config file content. |
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Returns a tuple of includes, excludes, and profiles. |
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""" |
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includes = set() |
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excludes = set() |
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current = includes |
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profiles = [] |
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for line in raw.split('\n'): |
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line = line.strip() |
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if not line or line.startswith('#'): |
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# empty or comment line, skip |
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continue |
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elif line.startswith('%include '): |
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line = line[9:].strip() |
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if line: |
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profiles.append(line) |
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elif line == '[include]': |
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if current != includes: |
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# TODO pass filename into this API so we can report it. |
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raise error.Abort(_('sparse config cannot have includes ' + |
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'after excludes')) |
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continue |
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elif line == '[exclude]': |
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current = excludes |
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elif line: |
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if line.strip().startswith('/'): |
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ui.warn(_('warning: sparse profile cannot use' + |
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' paths starting with /, ignoring %s\n') % line) |
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continue |
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current.add(line) |
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return includes, excludes, profiles |
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# Exists as separate function to facilitate monkeypatching. |
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def readprofile(repo, profile, changeid): |
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"""Resolve the raw content of a sparse profile file.""" |
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# TODO add some kind of cache here because this incurs a manifest |
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# resolve and can be slow. |
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return repo.filectx(profile, changeid=changeid).data() |
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def patternsforrev(repo, rev): |
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"""Obtain sparse checkout patterns for the given rev. |
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Returns a tuple of iterables representing includes, excludes, and |
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patterns. |
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""" |
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# Feature isn't enabled. No-op. |
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if not enabled: |
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return set(), set(), [] |
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raw = repo.vfs.tryread('sparse') |
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if not raw: |
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return set(), set(), [] |
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if rev is None: |
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raise error.Abort(_('cannot parse sparse patterns from working ' |
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'directory')) |
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includes, excludes, profiles = parseconfig(repo.ui, raw) |
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ctx = repo[rev] |
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if profiles: |
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visited = set() |
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while profiles: |
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profile = profiles.pop() |
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if profile in visited: |
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continue |
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visited.add(profile) |
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try: |
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raw = readprofile(repo, profile, rev) |
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except error.ManifestLookupError: |
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msg = ( |
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"warning: sparse profile '%s' not found " |
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"in rev %s - ignoring it\n" % (profile, ctx)) |
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# experimental config: sparse.missingwarning |
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if repo.ui.configbool( |
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'sparse', 'missingwarning', True): |
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repo.ui.warn(msg) |
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else: |
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repo.ui.debug(msg) |
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continue |
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pincludes, pexcludes, subprofs = parseconfig(repo.ui, raw) |
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includes.update(pincludes) |
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excludes.update(pexcludes) |
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for subprofile in subprofs: |
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profiles.append(subprofile) |
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119 |
|
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120 |
profiles = visited |
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121 |
|
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122 |
if includes: |
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123 |
includes.add('.hg*') |
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124 |
|
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125 |
return includes, excludes, profiles |
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126 |
|
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127 |
def activeprofiles(repo): |
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128 |
revs = [repo.changelog.rev(node) for node in |
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129 |
repo.dirstate.parents() if node != nullid] |
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130 |
|
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131 |
profiles = set() |
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132 |
for rev in revs: |
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133 |
profiles.update(patternsforrev(repo, rev)[2]) |
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134 |
|
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135 |
return profiles |
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136 |
|
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137 |
def invalidatesignaturecache(repo): |
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repo._sparsesignaturecache.clear() |
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139 |
|
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140 |
def configsignature(repo, includetemp=True): |
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141 |
"""Obtain the signature string for the current sparse configuration. |
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142 |
|
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This is used to construct a cache key for matchers. |
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144 |
""" |
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cache = repo._sparsesignaturecache |
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146 |
|
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signature = cache.get('signature') |
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148 |
|
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149 |
if includetemp: |
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tempsignature = cache.get('tempsignature') |
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151 |
else: |
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tempsignature = '0' |
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153 |
|
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154 |
if signature is None or (includetemp and tempsignature is None): |
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155 |
signature = hashlib.sha1(repo.vfs.tryread('sparse')).hexdigest() |
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156 |
cache['signature'] = signature |
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157 |
|
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158 |
if includetemp: |
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159 |
raw = repo.vfs.tryread('tempsparse') |
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tempsignature = hashlib.sha1(raw).hexdigest() |
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161 |
cache['tempsignature'] = tempsignature |
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162 |
|
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163 |
return '%s %s' % (signature, tempsignature) |
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164 |
|
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165 |
def writeconfig(repo, includes, excludes, profiles): |
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166 |
"""Write the sparse config file given a sparse configuration.""" |
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167 |
with repo.vfs('sparse', 'wb') as fh: |
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168 |
for p in sorted(profiles): |
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169 |
fh.write('%%include %s\n' % p) |
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170 |
|
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171 |
if includes: |
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172 |
fh.write('[include]\n') |
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173 |
for i in sorted(includes): |
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174 |
fh.write(i) |
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175 |
fh.write('\n') |
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176 |
|
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177 |
if excludes: |
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178 |
fh.write('[exclude]\n') |
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179 |
for e in sorted(excludes): |
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180 |
fh.write(e) |
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181 |
fh.write('\n') |
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182 |
|
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183 |
invalidatesignaturecache(repo) |
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|
184 |
|
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185 |
def readtemporaryincludes(repo): |
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|
186 |
raw = repo.vfs.tryread('tempsparse') |
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|
187 |
if not raw: |
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188 |
return set() |
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|
189 |
|
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190 |
return set(raw.split('\n')) |
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|
191 |
|
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|
192 |
def writetemporaryincludes(repo, includes): |
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193 |
repo.vfs.write('tempsparse', '\n'.join(sorted(includes))) |
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|
194 |
invalidatesignaturecache(repo) |
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|
195 |
|
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|
196 |
def addtemporaryincludes(repo, additional): |
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|
197 |
includes = readtemporaryincludes(repo) |
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|
198 |
for i in additional: |
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|
199 |
includes.add(i) |
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|
200 |
writetemporaryincludes(repo, includes) |
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|
201 |
|
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|
202 |
def prunetemporaryincludes(repo): |
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|
203 |
if not enabled or not repo.vfs.exists('tempsparse'): |
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204 |
return |
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|
205 |
|
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|
206 |
origstatus = repo.status() |
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|
207 |
modified, added, removed, deleted, a, b, c = origstatus |
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|
208 |
if modified or added or removed or deleted: |
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209 |
# Still have pending changes. Don't bother trying to prune. |
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|
210 |
return |
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|
211 |
|
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|
212 |
sparsematch = matcher(repo, includetemp=False) |
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213 |
dirstate = repo.dirstate |
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|
214 |
actions = [] |
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|
215 |
dropped = [] |
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|
216 |
tempincludes = readtemporaryincludes(repo) |
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|
217 |
for file in tempincludes: |
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|
218 |
if file in dirstate and not sparsematch(file): |
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|
219 |
message = _('dropping temporarily included sparse files') |
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220 |
actions.append((file, None, message)) |
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221 |
dropped.append(file) |
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222 |
|
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|
223 |
typeactions = collections.defaultdict(list) |
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|
224 |
typeactions['r'] = actions |
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|
225 |
mergemod.applyupdates(repo, typeactions, repo[None], repo['.'], False) |
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226 |
|
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|
227 |
# Fix dirstate |
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228 |
for file in dropped: |
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229 |
dirstate.drop(file) |
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230 |
|
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|
231 |
repo.vfs.unlink('tempsparse') |
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232 |
invalidatesignaturecache(repo) |
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|
233 |
msg = _('cleaned up %d temporarily added file(s) from the ' |
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|
234 |
'sparse checkout\n') |
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repo.ui.status(msg % len(tempincludes)) |
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def matcher(repo, revs=None, includetemp=True): |
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"""Obtain a matcher for sparse working directories for the given revs. |
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|
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If multiple revisions are specified, the matcher is the union of all |
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revs. |
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|
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``includetemp`` indicates whether to use the temporary sparse profile. |
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""" |
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# If sparse isn't enabled, sparse matcher matches everything. |
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if not enabled: |
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return matchmod.always(repo.root, '') |
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|
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if not revs or revs == [None]: |
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revs = [repo.changelog.rev(node) |
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for node in repo.dirstate.parents() if node != nullid] |
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signature = configsignature(repo, includetemp=includetemp) |
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|
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key = '%s %s' % (signature, ' '.join(map(pycompat.bytestr, revs))) |
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|
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result = repo._sparsematchercache.get(key) |
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if result: |
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return result |
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|
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matchers = [] |
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for rev in revs: |
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try: |
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includes, excludes, profiles = patternsforrev(repo, rev) |
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|
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if includes or excludes: |
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# Explicitly include subdirectories of includes so |
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# status will walk them down to the actual include. |
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subdirs = set() |
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for include in includes: |
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# TODO consider using posix path functions here so Windows |
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# \ directory separators don't come into play. |
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dirname = os.path.dirname(include) |
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# basename is used to avoid issues with absolute |
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# paths (which on Windows can include the drive). |
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while os.path.basename(dirname): |
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subdirs.add(dirname) |
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dirname = os.path.dirname(dirname) |
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|
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matcher = matchmod.match(repo.root, '', [], |
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include=includes, exclude=excludes, |
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default='relpath') |
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if subdirs: |
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matcher = matchmod.forceincludematcher(matcher, subdirs) |
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matchers.append(matcher) |
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except IOError: |
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pass |
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|
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if not matchers: |
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result = matchmod.always(repo.root, '') |
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elif len(matchers) == 1: |
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result = matchers[0] |
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else: |
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result = matchmod.unionmatcher(matchers) |
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|
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if includetemp: |
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tempincludes = readtemporaryincludes(repo) |
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result = matchmod.forceincludematcher(result, tempincludes) |
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|
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repo._sparsematchercache[key] = result |
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|
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return result |