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1 | # vfs.py - Mercurial 'vfs' classes |
|
1 | # vfs.py - Mercurial 'vfs' classes | |
2 | # |
|
2 | # | |
3 | # Copyright Matt Mackall <mpm@selenic.com> |
|
3 | # Copyright Matt Mackall <mpm@selenic.com> | |
4 | # |
|
4 | # | |
5 | # This software may be used and distributed according to the terms of the |
|
5 | # This software may be used and distributed according to the terms of the | |
6 | # GNU General Public License version 2 or any later version. |
|
6 | # GNU General Public License version 2 or any later version. | |
7 | from __future__ import absolute_import |
|
7 | from __future__ import absolute_import | |
8 |
|
8 | |||
9 | import contextlib |
|
9 | import contextlib | |
10 | import errno |
|
10 | import errno | |
11 | import os |
|
11 | import os | |
12 | import shutil |
|
12 | import shutil | |
13 | import stat |
|
13 | import stat | |
14 | import tempfile |
|
14 | import tempfile | |
15 | import threading |
|
15 | import threading | |
16 |
|
16 | |||
17 | from .i18n import _ |
|
17 | from .i18n import _ | |
18 | from . import ( |
|
18 | from . import ( | |
19 | error, |
|
19 | error, | |
20 | pathutil, |
|
20 | pathutil, | |
21 | pycompat, |
|
21 | pycompat, | |
22 | util, |
|
22 | util, | |
23 | ) |
|
23 | ) | |
24 |
|
24 | |||
25 | class abstractvfs(object): |
|
25 | class abstractvfs(object): | |
26 | """Abstract base class; cannot be instantiated""" |
|
26 | """Abstract base class; cannot be instantiated""" | |
27 |
|
27 | |||
28 | def __init__(self, *args, **kwargs): |
|
28 | def __init__(self, *args, **kwargs): | |
29 | '''Prevent instantiation; don't call this from subclasses.''' |
|
29 | '''Prevent instantiation; don't call this from subclasses.''' | |
30 | raise NotImplementedError('attempted instantiating ' + str(type(self))) |
|
30 | raise NotImplementedError('attempted instantiating ' + str(type(self))) | |
31 |
|
31 | |||
32 | def tryread(self, path): |
|
32 | def tryread(self, path): | |
33 | '''gracefully return an empty string for missing files''' |
|
33 | '''gracefully return an empty string for missing files''' | |
34 | try: |
|
34 | try: | |
35 | return self.read(path) |
|
35 | return self.read(path) | |
36 | except IOError as inst: |
|
36 | except IOError as inst: | |
37 | if inst.errno != errno.ENOENT: |
|
37 | if inst.errno != errno.ENOENT: | |
38 | raise |
|
38 | raise | |
39 | return "" |
|
39 | return "" | |
40 |
|
40 | |||
41 | def tryreadlines(self, path, mode='rb'): |
|
41 | def tryreadlines(self, path, mode='rb'): | |
42 | '''gracefully return an empty array for missing files''' |
|
42 | '''gracefully return an empty array for missing files''' | |
43 | try: |
|
43 | try: | |
44 | return self.readlines(path, mode=mode) |
|
44 | return self.readlines(path, mode=mode) | |
45 | except IOError as inst: |
|
45 | except IOError as inst: | |
46 | if inst.errno != errno.ENOENT: |
|
46 | if inst.errno != errno.ENOENT: | |
47 | raise |
|
47 | raise | |
48 | return [] |
|
48 | return [] | |
49 |
|
49 | |||
50 | @util.propertycache |
|
50 | @util.propertycache | |
51 | def open(self): |
|
51 | def open(self): | |
52 | '''Open ``path`` file, which is relative to vfs root. |
|
52 | '''Open ``path`` file, which is relative to vfs root. | |
53 |
|
53 | |||
54 | Newly created directories are marked as "not to be indexed by |
|
54 | Newly created directories are marked as "not to be indexed by | |
55 | the content indexing service", if ``notindexed`` is specified |
|
55 | the content indexing service", if ``notindexed`` is specified | |
56 | for "write" mode access. |
|
56 | for "write" mode access. | |
57 | ''' |
|
57 | ''' | |
58 | return self.__call__ |
|
58 | return self.__call__ | |
59 |
|
59 | |||
60 | def read(self, path): |
|
60 | def read(self, path): | |
61 | with self(path, 'rb') as fp: |
|
61 | with self(path, 'rb') as fp: | |
62 | return fp.read() |
|
62 | return fp.read() | |
63 |
|
63 | |||
64 | def readlines(self, path, mode='rb'): |
|
64 | def readlines(self, path, mode='rb'): | |
65 | with self(path, mode=mode) as fp: |
|
65 | with self(path, mode=mode) as fp: | |
66 | return fp.readlines() |
|
66 | return fp.readlines() | |
67 |
|
67 | |||
68 | def write(self, path, data, backgroundclose=False): |
|
68 | def write(self, path, data, backgroundclose=False): | |
69 | with self(path, 'wb', backgroundclose=backgroundclose) as fp: |
|
69 | with self(path, 'wb', backgroundclose=backgroundclose) as fp: | |
70 | return fp.write(data) |
|
70 | return fp.write(data) | |
71 |
|
71 | |||
72 | def writelines(self, path, data, mode='wb', notindexed=False): |
|
72 | def writelines(self, path, data, mode='wb', notindexed=False): | |
73 | with self(path, mode=mode, notindexed=notindexed) as fp: |
|
73 | with self(path, mode=mode, notindexed=notindexed) as fp: | |
74 | return fp.writelines(data) |
|
74 | return fp.writelines(data) | |
75 |
|
75 | |||
76 | def append(self, path, data): |
|
76 | def append(self, path, data): | |
77 | with self(path, 'ab') as fp: |
|
77 | with self(path, 'ab') as fp: | |
78 | return fp.write(data) |
|
78 | return fp.write(data) | |
79 |
|
79 | |||
80 | def basename(self, path): |
|
80 | def basename(self, path): | |
81 | """return base element of a path (as os.path.basename would do) |
|
81 | """return base element of a path (as os.path.basename would do) | |
82 |
|
82 | |||
83 | This exists to allow handling of strange encoding if needed.""" |
|
83 | This exists to allow handling of strange encoding if needed.""" | |
84 | return os.path.basename(path) |
|
84 | return os.path.basename(path) | |
85 |
|
85 | |||
86 | def chmod(self, path, mode): |
|
86 | def chmod(self, path, mode): | |
87 | return os.chmod(self.join(path), mode) |
|
87 | return os.chmod(self.join(path), mode) | |
88 |
|
88 | |||
89 | def dirname(self, path): |
|
89 | def dirname(self, path): | |
90 | """return dirname element of a path (as os.path.dirname would do) |
|
90 | """return dirname element of a path (as os.path.dirname would do) | |
91 |
|
91 | |||
92 | This exists to allow handling of strange encoding if needed.""" |
|
92 | This exists to allow handling of strange encoding if needed.""" | |
93 | return os.path.dirname(path) |
|
93 | return os.path.dirname(path) | |
94 |
|
94 | |||
95 | def exists(self, path=None): |
|
95 | def exists(self, path=None): | |
96 | return os.path.exists(self.join(path)) |
|
96 | return os.path.exists(self.join(path)) | |
97 |
|
97 | |||
98 | def fstat(self, fp): |
|
98 | def fstat(self, fp): | |
99 | return util.fstat(fp) |
|
99 | return util.fstat(fp) | |
100 |
|
100 | |||
101 | def isdir(self, path=None): |
|
101 | def isdir(self, path=None): | |
102 | return os.path.isdir(self.join(path)) |
|
102 | return os.path.isdir(self.join(path)) | |
103 |
|
103 | |||
104 | def isfile(self, path=None): |
|
104 | def isfile(self, path=None): | |
105 | return os.path.isfile(self.join(path)) |
|
105 | return os.path.isfile(self.join(path)) | |
106 |
|
106 | |||
107 | def islink(self, path=None): |
|
107 | def islink(self, path=None): | |
108 | return os.path.islink(self.join(path)) |
|
108 | return os.path.islink(self.join(path)) | |
109 |
|
109 | |||
110 | def isfileorlink(self, path=None): |
|
110 | def isfileorlink(self, path=None): | |
111 | '''return whether path is a regular file or a symlink |
|
111 | '''return whether path is a regular file or a symlink | |
112 |
|
112 | |||
113 | Unlike isfile, this doesn't follow symlinks.''' |
|
113 | Unlike isfile, this doesn't follow symlinks.''' | |
114 | try: |
|
114 | try: | |
115 | st = self.lstat(path) |
|
115 | st = self.lstat(path) | |
116 | except OSError: |
|
116 | except OSError: | |
117 | return False |
|
117 | return False | |
118 | mode = st.st_mode |
|
118 | mode = st.st_mode | |
119 | return stat.S_ISREG(mode) or stat.S_ISLNK(mode) |
|
119 | return stat.S_ISREG(mode) or stat.S_ISLNK(mode) | |
120 |
|
120 | |||
121 | def reljoin(self, *paths): |
|
121 | def reljoin(self, *paths): | |
122 | """join various elements of a path together (as os.path.join would do) |
|
122 | """join various elements of a path together (as os.path.join would do) | |
123 |
|
123 | |||
124 | The vfs base is not injected so that path stay relative. This exists |
|
124 | The vfs base is not injected so that path stay relative. This exists | |
125 | to allow handling of strange encoding if needed.""" |
|
125 | to allow handling of strange encoding if needed.""" | |
126 | return os.path.join(*paths) |
|
126 | return os.path.join(*paths) | |
127 |
|
127 | |||
128 | def split(self, path): |
|
128 | def split(self, path): | |
129 | """split top-most element of a path (as os.path.split would do) |
|
129 | """split top-most element of a path (as os.path.split would do) | |
130 |
|
130 | |||
131 | This exists to allow handling of strange encoding if needed.""" |
|
131 | This exists to allow handling of strange encoding if needed.""" | |
132 | return os.path.split(path) |
|
132 | return os.path.split(path) | |
133 |
|
133 | |||
134 | def lexists(self, path=None): |
|
134 | def lexists(self, path=None): | |
135 | return os.path.lexists(self.join(path)) |
|
135 | return os.path.lexists(self.join(path)) | |
136 |
|
136 | |||
137 | def lstat(self, path=None): |
|
137 | def lstat(self, path=None): | |
138 | return os.lstat(self.join(path)) |
|
138 | return os.lstat(self.join(path)) | |
139 |
|
139 | |||
140 | def listdir(self, path=None): |
|
140 | def listdir(self, path=None): | |
141 | return os.listdir(self.join(path)) |
|
141 | return os.listdir(self.join(path)) | |
142 |
|
142 | |||
143 | def makedir(self, path=None, notindexed=True): |
|
143 | def makedir(self, path=None, notindexed=True): | |
144 | return util.makedir(self.join(path), notindexed) |
|
144 | return util.makedir(self.join(path), notindexed) | |
145 |
|
145 | |||
146 | def makedirs(self, path=None, mode=None): |
|
146 | def makedirs(self, path=None, mode=None): | |
147 | return util.makedirs(self.join(path), mode) |
|
147 | return util.makedirs(self.join(path), mode) | |
148 |
|
148 | |||
149 | def makelock(self, info, path): |
|
149 | def makelock(self, info, path): | |
150 | return util.makelock(info, self.join(path)) |
|
150 | return util.makelock(info, self.join(path)) | |
151 |
|
151 | |||
152 | def mkdir(self, path=None): |
|
152 | def mkdir(self, path=None): | |
153 | return os.mkdir(self.join(path)) |
|
153 | return os.mkdir(self.join(path)) | |
154 |
|
154 | |||
155 | def mkstemp(self, suffix='', prefix='tmp', dir=None, text=False): |
|
155 | def mkstemp(self, suffix='', prefix='tmp', dir=None, text=False): | |
156 | fd, name = tempfile.mkstemp(suffix=suffix, prefix=prefix, |
|
156 | fd, name = tempfile.mkstemp(suffix=suffix, prefix=prefix, | |
157 | dir=self.join(dir), text=text) |
|
157 | dir=self.join(dir), text=text) | |
158 | dname, fname = util.split(name) |
|
158 | dname, fname = util.split(name) | |
159 | if dir: |
|
159 | if dir: | |
160 | return fd, os.path.join(dir, fname) |
|
160 | return fd, os.path.join(dir, fname) | |
161 | else: |
|
161 | else: | |
162 | return fd, fname |
|
162 | return fd, fname | |
163 |
|
163 | |||
164 | def readdir(self, path=None, stat=None, skip=None): |
|
164 | def readdir(self, path=None, stat=None, skip=None): | |
165 | return util.listdir(self.join(path), stat, skip) |
|
165 | return util.listdir(self.join(path), stat, skip) | |
166 |
|
166 | |||
167 | def readlock(self, path): |
|
167 | def readlock(self, path): | |
168 | return util.readlock(self.join(path)) |
|
168 | return util.readlock(self.join(path)) | |
169 |
|
169 | |||
170 | def rename(self, src, dst, checkambig=False): |
|
170 | def rename(self, src, dst, checkambig=False): | |
171 | """Rename from src to dst |
|
171 | """Rename from src to dst | |
172 |
|
172 | |||
173 | checkambig argument is used with util.filestat, and is useful |
|
173 | checkambig argument is used with util.filestat, and is useful | |
174 | only if destination file is guarded by any lock |
|
174 | only if destination file is guarded by any lock | |
175 | (e.g. repo.lock or repo.wlock). |
|
175 | (e.g. repo.lock or repo.wlock). | |
176 | """ |
|
176 | """ | |
177 | srcpath = self.join(src) |
|
177 | srcpath = self.join(src) | |
178 | dstpath = self.join(dst) |
|
178 | dstpath = self.join(dst) | |
179 | oldstat = checkambig and util.filestat.frompath(dstpath) |
|
179 | oldstat = checkambig and util.filestat.frompath(dstpath) | |
180 | if oldstat and oldstat.stat: |
|
180 | if oldstat and oldstat.stat: | |
181 | def dorename(spath, dpath): |
|
181 | def dorename(spath, dpath): | |
182 | ret = util.rename(spath, dpath) |
|
182 | ret = util.rename(spath, dpath) | |
183 | newstat = util.filestat.frompath(dpath) |
|
183 | newstat = util.filestat.frompath(dpath) | |
184 | if newstat.isambig(oldstat): |
|
184 | if newstat.isambig(oldstat): | |
185 | # stat of renamed file is ambiguous to original one |
|
185 | # stat of renamed file is ambiguous to original one | |
186 | return ret, newstat.avoidambig(dpath, oldstat) |
|
186 | return ret, newstat.avoidambig(dpath, oldstat) | |
187 | return ret, True |
|
187 | return ret, True | |
188 | ret, avoided = dorename(srcpath, dstpath) |
|
188 | ret, avoided = dorename(srcpath, dstpath) | |
189 | if not avoided: |
|
189 | if not avoided: | |
190 | # simply copy to change owner of srcpath (see issue5418) |
|
190 | # simply copy to change owner of srcpath (see issue5418) | |
191 | util.copyfile(dstpath, srcpath) |
|
191 | util.copyfile(dstpath, srcpath) | |
192 | ret, avoided = dorename(srcpath, dstpath) |
|
192 | ret, avoided = dorename(srcpath, dstpath) | |
193 | return ret |
|
193 | return ret | |
194 | return util.rename(srcpath, dstpath) |
|
194 | return util.rename(srcpath, dstpath) | |
195 |
|
195 | |||
196 | def readlink(self, path): |
|
196 | def readlink(self, path): | |
197 | return os.readlink(self.join(path)) |
|
197 | return os.readlink(self.join(path)) | |
198 |
|
198 | |||
199 | def removedirs(self, path=None): |
|
199 | def removedirs(self, path=None): | |
200 | """Remove a leaf directory and all empty intermediate ones |
|
200 | """Remove a leaf directory and all empty intermediate ones | |
201 | """ |
|
201 | """ | |
202 | return util.removedirs(self.join(path)) |
|
202 | return util.removedirs(self.join(path)) | |
203 |
|
203 | |||
204 | def rmtree(self, path=None, ignore_errors=False, forcibly=False): |
|
204 | def rmtree(self, path=None, ignore_errors=False, forcibly=False): | |
205 | """Remove a directory tree recursively |
|
205 | """Remove a directory tree recursively | |
206 |
|
206 | |||
207 | If ``forcibly``, this tries to remove READ-ONLY files, too. |
|
207 | If ``forcibly``, this tries to remove READ-ONLY files, too. | |
208 | """ |
|
208 | """ | |
209 | if forcibly: |
|
209 | if forcibly: | |
210 | def onerror(function, path, excinfo): |
|
210 | def onerror(function, path, excinfo): | |
211 | if function is not os.remove: |
|
211 | if function is not os.remove: | |
212 | raise |
|
212 | raise | |
213 | # read-only files cannot be unlinked under Windows |
|
213 | # read-only files cannot be unlinked under Windows | |
214 | s = os.stat(path) |
|
214 | s = os.stat(path) | |
215 | if (s.st_mode & stat.S_IWRITE) != 0: |
|
215 | if (s.st_mode & stat.S_IWRITE) != 0: | |
216 | raise |
|
216 | raise | |
217 | os.chmod(path, stat.S_IMODE(s.st_mode) | stat.S_IWRITE) |
|
217 | os.chmod(path, stat.S_IMODE(s.st_mode) | stat.S_IWRITE) | |
218 | os.remove(path) |
|
218 | os.remove(path) | |
219 | else: |
|
219 | else: | |
220 | onerror = None |
|
220 | onerror = None | |
221 | return shutil.rmtree(self.join(path), |
|
221 | return shutil.rmtree(self.join(path), | |
222 | ignore_errors=ignore_errors, onerror=onerror) |
|
222 | ignore_errors=ignore_errors, onerror=onerror) | |
223 |
|
223 | |||
224 | def setflags(self, path, l, x): |
|
224 | def setflags(self, path, l, x): | |
225 | return util.setflags(self.join(path), l, x) |
|
225 | return util.setflags(self.join(path), l, x) | |
226 |
|
226 | |||
227 | def stat(self, path=None): |
|
227 | def stat(self, path=None): | |
228 | return os.stat(self.join(path)) |
|
228 | return os.stat(self.join(path)) | |
229 |
|
229 | |||
230 | def unlink(self, path=None): |
|
230 | def unlink(self, path=None): | |
231 | return util.unlink(self.join(path)) |
|
231 | return util.unlink(self.join(path)) | |
232 |
|
232 | |||
233 | def tryunlink(self, path=None): |
|
233 | def tryunlink(self, path=None): | |
234 | """Attempt to remove a file, ignoring missing file errors.""" |
|
234 | """Attempt to remove a file, ignoring missing file errors.""" | |
235 | util.tryunlink(self.join(path)) |
|
235 | util.tryunlink(self.join(path)) | |
236 |
|
236 | |||
237 | def unlinkpath(self, path=None, ignoremissing=False): |
|
237 | def unlinkpath(self, path=None, ignoremissing=False): | |
238 | return util.unlinkpath(self.join(path), ignoremissing=ignoremissing) |
|
238 | return util.unlinkpath(self.join(path), ignoremissing=ignoremissing) | |
239 |
|
239 | |||
240 | def utime(self, path=None, t=None): |
|
240 | def utime(self, path=None, t=None): | |
241 | return os.utime(self.join(path), t) |
|
241 | return os.utime(self.join(path), t) | |
242 |
|
242 | |||
243 | def walk(self, path=None, onerror=None): |
|
243 | def walk(self, path=None, onerror=None): | |
244 | """Yield (dirpath, dirs, files) tuple for each directories under path |
|
244 | """Yield (dirpath, dirs, files) tuple for each directories under path | |
245 |
|
245 | |||
246 | ``dirpath`` is relative one from the root of this vfs. This |
|
246 | ``dirpath`` is relative one from the root of this vfs. This | |
247 | uses ``os.sep`` as path separator, even you specify POSIX |
|
247 | uses ``os.sep`` as path separator, even you specify POSIX | |
248 | style ``path``. |
|
248 | style ``path``. | |
249 |
|
249 | |||
250 | "The root of this vfs" is represented as empty ``dirpath``. |
|
250 | "The root of this vfs" is represented as empty ``dirpath``. | |
251 | """ |
|
251 | """ | |
252 | root = os.path.normpath(self.join(None)) |
|
252 | root = os.path.normpath(self.join(None)) | |
253 | # when dirpath == root, dirpath[prefixlen:] becomes empty |
|
253 | # when dirpath == root, dirpath[prefixlen:] becomes empty | |
254 | # because len(dirpath) < prefixlen. |
|
254 | # because len(dirpath) < prefixlen. | |
255 | prefixlen = len(pathutil.normasprefix(root)) |
|
255 | prefixlen = len(pathutil.normasprefix(root)) | |
256 | for dirpath, dirs, files in os.walk(self.join(path), onerror=onerror): |
|
256 | for dirpath, dirs, files in os.walk(self.join(path), onerror=onerror): | |
257 | yield (dirpath[prefixlen:], dirs, files) |
|
257 | yield (dirpath[prefixlen:], dirs, files) | |
258 |
|
258 | |||
259 | @contextlib.contextmanager |
|
259 | @contextlib.contextmanager | |
260 | def backgroundclosing(self, ui, expectedcount=-1): |
|
260 | def backgroundclosing(self, ui, expectedcount=-1): | |
261 | """Allow files to be closed asynchronously. |
|
261 | """Allow files to be closed asynchronously. | |
262 |
|
262 | |||
263 | When this context manager is active, ``backgroundclose`` can be passed |
|
263 | When this context manager is active, ``backgroundclose`` can be passed | |
264 | to ``__call__``/``open`` to result in the file possibly being closed |
|
264 | to ``__call__``/``open`` to result in the file possibly being closed | |
265 | asynchronously, on a background thread. |
|
265 | asynchronously, on a background thread. | |
266 | """ |
|
266 | """ | |
267 | # This is an arbitrary restriction and could be changed if we ever |
|
267 | # This is an arbitrary restriction and could be changed if we ever | |
268 | # have a use case. |
|
268 | # have a use case. | |
269 | vfs = getattr(self, 'vfs', self) |
|
269 | vfs = getattr(self, 'vfs', self) | |
270 | if getattr(vfs, '_backgroundfilecloser', None): |
|
270 | if getattr(vfs, '_backgroundfilecloser', None): | |
271 | raise error.Abort( |
|
271 | raise error.Abort( | |
272 | _('can only have 1 active background file closer')) |
|
272 | _('can only have 1 active background file closer')) | |
273 |
|
273 | |||
274 | with backgroundfilecloser(ui, expectedcount=expectedcount) as bfc: |
|
274 | with backgroundfilecloser(ui, expectedcount=expectedcount) as bfc: | |
275 | try: |
|
275 | try: | |
276 | vfs._backgroundfilecloser = bfc |
|
276 | vfs._backgroundfilecloser = bfc | |
277 | yield bfc |
|
277 | yield bfc | |
278 | finally: |
|
278 | finally: | |
279 | vfs._backgroundfilecloser = None |
|
279 | vfs._backgroundfilecloser = None | |
280 |
|
280 | |||
281 | class vfs(abstractvfs): |
|
281 | class vfs(abstractvfs): | |
282 | '''Operate files relative to a base directory |
|
282 | '''Operate files relative to a base directory | |
283 |
|
283 | |||
284 | This class is used to hide the details of COW semantics and |
|
284 | This class is used to hide the details of COW semantics and | |
285 | remote file access from higher level code. |
|
285 | remote file access from higher level code. | |
286 | ''' |
|
286 | ''' | |
287 | def __init__(self, base, audit=True, expandpath=False, realpath=False): |
|
287 | def __init__(self, base, audit=True, expandpath=False, realpath=False): | |
288 | if expandpath: |
|
288 | if expandpath: | |
289 | base = util.expandpath(base) |
|
289 | base = util.expandpath(base) | |
290 | if realpath: |
|
290 | if realpath: | |
291 | base = os.path.realpath(base) |
|
291 | base = os.path.realpath(base) | |
292 | self.base = base |
|
292 | self.base = base | |
293 |
self. |
|
293 | self._audit = audit | |
294 | self.createmode = None |
|
294 | if audit: | |
295 | self._trustnlink = None |
|
|||
296 |
|
||||
297 | @property |
|
|||
298 | def mustaudit(self): |
|
|||
299 | return self._audit |
|
|||
300 |
|
||||
301 | @mustaudit.setter |
|
|||
302 | def mustaudit(self, onoff): |
|
|||
303 | self._audit = onoff |
|
|||
304 | if onoff: |
|
|||
305 | self.audit = pathutil.pathauditor(self.base) |
|
295 | self.audit = pathutil.pathauditor(self.base) | |
306 | else: |
|
296 | else: | |
307 | self.audit = util.always |
|
297 | self.audit = util.always | |
|
298 | self.createmode = None | |||
|
299 | self._trustnlink = None | |||
308 |
|
300 | |||
309 | @util.propertycache |
|
301 | @util.propertycache | |
310 | def _cansymlink(self): |
|
302 | def _cansymlink(self): | |
311 | return util.checklink(self.base) |
|
303 | return util.checklink(self.base) | |
312 |
|
304 | |||
313 | @util.propertycache |
|
305 | @util.propertycache | |
314 | def _chmod(self): |
|
306 | def _chmod(self): | |
315 | return util.checkexec(self.base) |
|
307 | return util.checkexec(self.base) | |
316 |
|
308 | |||
317 | def _fixfilemode(self, name): |
|
309 | def _fixfilemode(self, name): | |
318 | if self.createmode is None or not self._chmod: |
|
310 | if self.createmode is None or not self._chmod: | |
319 | return |
|
311 | return | |
320 | os.chmod(name, self.createmode & 0o666) |
|
312 | os.chmod(name, self.createmode & 0o666) | |
321 |
|
313 | |||
322 | def __call__(self, path, mode="r", text=False, atomictemp=False, |
|
314 | def __call__(self, path, mode="r", text=False, atomictemp=False, | |
323 | notindexed=False, backgroundclose=False, checkambig=False, |
|
315 | notindexed=False, backgroundclose=False, checkambig=False, | |
324 | auditpath=True): |
|
316 | auditpath=True): | |
325 | '''Open ``path`` file, which is relative to vfs root. |
|
317 | '''Open ``path`` file, which is relative to vfs root. | |
326 |
|
318 | |||
327 | Newly created directories are marked as "not to be indexed by |
|
319 | Newly created directories are marked as "not to be indexed by | |
328 | the content indexing service", if ``notindexed`` is specified |
|
320 | the content indexing service", if ``notindexed`` is specified | |
329 | for "write" mode access. |
|
321 | for "write" mode access. | |
330 |
|
322 | |||
331 | If ``backgroundclose`` is passed, the file may be closed asynchronously. |
|
323 | If ``backgroundclose`` is passed, the file may be closed asynchronously. | |
332 | It can only be used if the ``self.backgroundclosing()`` context manager |
|
324 | It can only be used if the ``self.backgroundclosing()`` context manager | |
333 | is active. This should only be specified if the following criteria hold: |
|
325 | is active. This should only be specified if the following criteria hold: | |
334 |
|
326 | |||
335 | 1. There is a potential for writing thousands of files. Unless you |
|
327 | 1. There is a potential for writing thousands of files. Unless you | |
336 | are writing thousands of files, the performance benefits of |
|
328 | are writing thousands of files, the performance benefits of | |
337 | asynchronously closing files is not realized. |
|
329 | asynchronously closing files is not realized. | |
338 | 2. Files are opened exactly once for the ``backgroundclosing`` |
|
330 | 2. Files are opened exactly once for the ``backgroundclosing`` | |
339 | active duration and are therefore free of race conditions between |
|
331 | active duration and are therefore free of race conditions between | |
340 | closing a file on a background thread and reopening it. (If the |
|
332 | closing a file on a background thread and reopening it. (If the | |
341 | file were opened multiple times, there could be unflushed data |
|
333 | file were opened multiple times, there could be unflushed data | |
342 | because the original file handle hasn't been flushed/closed yet.) |
|
334 | because the original file handle hasn't been flushed/closed yet.) | |
343 |
|
335 | |||
344 | ``checkambig`` argument is passed to atomictemplfile (valid |
|
336 | ``checkambig`` argument is passed to atomictemplfile (valid | |
345 | only for writing), and is useful only if target file is |
|
337 | only for writing), and is useful only if target file is | |
346 | guarded by any lock (e.g. repo.lock or repo.wlock). |
|
338 | guarded by any lock (e.g. repo.lock or repo.wlock). | |
347 | ''' |
|
339 | ''' | |
348 | if auditpath: |
|
340 | if auditpath: | |
349 | if self._audit: |
|
341 | if self._audit: | |
350 | r = util.checkosfilename(path) |
|
342 | r = util.checkosfilename(path) | |
351 | if r: |
|
343 | if r: | |
352 | raise error.Abort("%s: %r" % (r, path)) |
|
344 | raise error.Abort("%s: %r" % (r, path)) | |
353 | self.audit(path) |
|
345 | self.audit(path) | |
354 | f = self.join(path) |
|
346 | f = self.join(path) | |
355 |
|
347 | |||
356 | if not text and "b" not in mode: |
|
348 | if not text and "b" not in mode: | |
357 | mode += "b" # for that other OS |
|
349 | mode += "b" # for that other OS | |
358 |
|
350 | |||
359 | nlink = -1 |
|
351 | nlink = -1 | |
360 | if mode not in ('r', 'rb'): |
|
352 | if mode not in ('r', 'rb'): | |
361 | dirname, basename = util.split(f) |
|
353 | dirname, basename = util.split(f) | |
362 | # If basename is empty, then the path is malformed because it points |
|
354 | # If basename is empty, then the path is malformed because it points | |
363 | # to a directory. Let the posixfile() call below raise IOError. |
|
355 | # to a directory. Let the posixfile() call below raise IOError. | |
364 | if basename: |
|
356 | if basename: | |
365 | if atomictemp: |
|
357 | if atomictemp: | |
366 | util.makedirs(dirname, self.createmode, notindexed) |
|
358 | util.makedirs(dirname, self.createmode, notindexed) | |
367 | return util.atomictempfile(f, mode, self.createmode, |
|
359 | return util.atomictempfile(f, mode, self.createmode, | |
368 | checkambig=checkambig) |
|
360 | checkambig=checkambig) | |
369 | try: |
|
361 | try: | |
370 | if 'w' in mode: |
|
362 | if 'w' in mode: | |
371 | util.unlink(f) |
|
363 | util.unlink(f) | |
372 | nlink = 0 |
|
364 | nlink = 0 | |
373 | else: |
|
365 | else: | |
374 | # nlinks() may behave differently for files on Windows |
|
366 | # nlinks() may behave differently for files on Windows | |
375 | # shares if the file is open. |
|
367 | # shares if the file is open. | |
376 | with util.posixfile(f): |
|
368 | with util.posixfile(f): | |
377 | nlink = util.nlinks(f) |
|
369 | nlink = util.nlinks(f) | |
378 | if nlink < 1: |
|
370 | if nlink < 1: | |
379 | nlink = 2 # force mktempcopy (issue1922) |
|
371 | nlink = 2 # force mktempcopy (issue1922) | |
380 | except (OSError, IOError) as e: |
|
372 | except (OSError, IOError) as e: | |
381 | if e.errno != errno.ENOENT: |
|
373 | if e.errno != errno.ENOENT: | |
382 | raise |
|
374 | raise | |
383 | nlink = 0 |
|
375 | nlink = 0 | |
384 | util.makedirs(dirname, self.createmode, notindexed) |
|
376 | util.makedirs(dirname, self.createmode, notindexed) | |
385 | if nlink > 0: |
|
377 | if nlink > 0: | |
386 | if self._trustnlink is None: |
|
378 | if self._trustnlink is None: | |
387 | self._trustnlink = nlink > 1 or util.checknlink(f) |
|
379 | self._trustnlink = nlink > 1 or util.checknlink(f) | |
388 | if nlink > 1 or not self._trustnlink: |
|
380 | if nlink > 1 or not self._trustnlink: | |
389 | util.rename(util.mktempcopy(f), f) |
|
381 | util.rename(util.mktempcopy(f), f) | |
390 | fp = util.posixfile(f, mode) |
|
382 | fp = util.posixfile(f, mode) | |
391 | if nlink == 0: |
|
383 | if nlink == 0: | |
392 | self._fixfilemode(f) |
|
384 | self._fixfilemode(f) | |
393 |
|
385 | |||
394 | if checkambig: |
|
386 | if checkambig: | |
395 | if mode in ('r', 'rb'): |
|
387 | if mode in ('r', 'rb'): | |
396 | raise error.Abort(_('implementation error: mode %s is not' |
|
388 | raise error.Abort(_('implementation error: mode %s is not' | |
397 | ' valid for checkambig=True') % mode) |
|
389 | ' valid for checkambig=True') % mode) | |
398 | fp = checkambigatclosing(fp) |
|
390 | fp = checkambigatclosing(fp) | |
399 |
|
391 | |||
400 | if backgroundclose: |
|
392 | if backgroundclose: | |
401 | if not self._backgroundfilecloser: |
|
393 | if not self._backgroundfilecloser: | |
402 | raise error.Abort(_('backgroundclose can only be used when a ' |
|
394 | raise error.Abort(_('backgroundclose can only be used when a ' | |
403 | 'backgroundclosing context manager is active') |
|
395 | 'backgroundclosing context manager is active') | |
404 | ) |
|
396 | ) | |
405 |
|
397 | |||
406 | fp = delayclosedfile(fp, self._backgroundfilecloser) |
|
398 | fp = delayclosedfile(fp, self._backgroundfilecloser) | |
407 |
|
399 | |||
408 | return fp |
|
400 | return fp | |
409 |
|
401 | |||
410 | def symlink(self, src, dst): |
|
402 | def symlink(self, src, dst): | |
411 | self.audit(dst) |
|
403 | self.audit(dst) | |
412 | linkname = self.join(dst) |
|
404 | linkname = self.join(dst) | |
413 | util.tryunlink(linkname) |
|
405 | util.tryunlink(linkname) | |
414 |
|
406 | |||
415 | util.makedirs(os.path.dirname(linkname), self.createmode) |
|
407 | util.makedirs(os.path.dirname(linkname), self.createmode) | |
416 |
|
408 | |||
417 | if self._cansymlink: |
|
409 | if self._cansymlink: | |
418 | try: |
|
410 | try: | |
419 | os.symlink(src, linkname) |
|
411 | os.symlink(src, linkname) | |
420 | except OSError as err: |
|
412 | except OSError as err: | |
421 | raise OSError(err.errno, _('could not symlink to %r: %s') % |
|
413 | raise OSError(err.errno, _('could not symlink to %r: %s') % | |
422 | (src, err.strerror), linkname) |
|
414 | (src, err.strerror), linkname) | |
423 | else: |
|
415 | else: | |
424 | self.write(dst, src) |
|
416 | self.write(dst, src) | |
425 |
|
417 | |||
426 | def join(self, path, *insidef): |
|
418 | def join(self, path, *insidef): | |
427 | if path: |
|
419 | if path: | |
428 | return os.path.join(self.base, path, *insidef) |
|
420 | return os.path.join(self.base, path, *insidef) | |
429 | else: |
|
421 | else: | |
430 | return self.base |
|
422 | return self.base | |
431 |
|
423 | |||
432 | opener = vfs |
|
424 | opener = vfs | |
433 |
|
425 | |||
434 | class auditvfs(object): |
|
426 | class auditvfs(object): | |
435 | def __init__(self, vfs): |
|
427 | def __init__(self, vfs): | |
436 | self.vfs = vfs |
|
428 | self.vfs = vfs | |
437 |
|
429 | |||
438 | @property |
|
430 | @property | |
439 | def mustaudit(self): |
|
|||
440 | return self.vfs.mustaudit |
|
|||
441 |
|
||||
442 | @mustaudit.setter |
|
|||
443 | def mustaudit(self, onoff): |
|
|||
444 | self.vfs.mustaudit = onoff |
|
|||
445 |
|
||||
446 | @property |
|
|||
447 | def options(self): |
|
431 | def options(self): | |
448 | return self.vfs.options |
|
432 | return self.vfs.options | |
449 |
|
433 | |||
450 | @options.setter |
|
434 | @options.setter | |
451 | def options(self, value): |
|
435 | def options(self, value): | |
452 | self.vfs.options = value |
|
436 | self.vfs.options = value | |
453 |
|
437 | |||
454 | class filtervfs(abstractvfs, auditvfs): |
|
438 | class filtervfs(abstractvfs, auditvfs): | |
455 | '''Wrapper vfs for filtering filenames with a function.''' |
|
439 | '''Wrapper vfs for filtering filenames with a function.''' | |
456 |
|
440 | |||
457 | def __init__(self, vfs, filter): |
|
441 | def __init__(self, vfs, filter): | |
458 | auditvfs.__init__(self, vfs) |
|
442 | auditvfs.__init__(self, vfs) | |
459 | self._filter = filter |
|
443 | self._filter = filter | |
460 |
|
444 | |||
461 | def __call__(self, path, *args, **kwargs): |
|
445 | def __call__(self, path, *args, **kwargs): | |
462 | return self.vfs(self._filter(path), *args, **kwargs) |
|
446 | return self.vfs(self._filter(path), *args, **kwargs) | |
463 |
|
447 | |||
464 | def join(self, path, *insidef): |
|
448 | def join(self, path, *insidef): | |
465 | if path: |
|
449 | if path: | |
466 | return self.vfs.join(self._filter(self.vfs.reljoin(path, *insidef))) |
|
450 | return self.vfs.join(self._filter(self.vfs.reljoin(path, *insidef))) | |
467 | else: |
|
451 | else: | |
468 | return self.vfs.join(path) |
|
452 | return self.vfs.join(path) | |
469 |
|
453 | |||
470 | filteropener = filtervfs |
|
454 | filteropener = filtervfs | |
471 |
|
455 | |||
472 | class readonlyvfs(abstractvfs, auditvfs): |
|
456 | class readonlyvfs(abstractvfs, auditvfs): | |
473 | '''Wrapper vfs preventing any writing.''' |
|
457 | '''Wrapper vfs preventing any writing.''' | |
474 |
|
458 | |||
475 | def __init__(self, vfs): |
|
459 | def __init__(self, vfs): | |
476 | auditvfs.__init__(self, vfs) |
|
460 | auditvfs.__init__(self, vfs) | |
477 |
|
461 | |||
478 | def __call__(self, path, mode='r', *args, **kw): |
|
462 | def __call__(self, path, mode='r', *args, **kw): | |
479 | if mode not in ('r', 'rb'): |
|
463 | if mode not in ('r', 'rb'): | |
480 | raise error.Abort(_('this vfs is read only')) |
|
464 | raise error.Abort(_('this vfs is read only')) | |
481 | return self.vfs(path, mode, *args, **kw) |
|
465 | return self.vfs(path, mode, *args, **kw) | |
482 |
|
466 | |||
483 | def join(self, path, *insidef): |
|
467 | def join(self, path, *insidef): | |
484 | return self.vfs.join(path, *insidef) |
|
468 | return self.vfs.join(path, *insidef) | |
485 |
|
469 | |||
486 | class closewrapbase(object): |
|
470 | class closewrapbase(object): | |
487 | """Base class of wrapper, which hooks closing |
|
471 | """Base class of wrapper, which hooks closing | |
488 |
|
472 | |||
489 | Do not instantiate outside of the vfs layer. |
|
473 | Do not instantiate outside of the vfs layer. | |
490 | """ |
|
474 | """ | |
491 | def __init__(self, fh): |
|
475 | def __init__(self, fh): | |
492 | object.__setattr__(self, r'_origfh', fh) |
|
476 | object.__setattr__(self, r'_origfh', fh) | |
493 |
|
477 | |||
494 | def __getattr__(self, attr): |
|
478 | def __getattr__(self, attr): | |
495 | return getattr(self._origfh, attr) |
|
479 | return getattr(self._origfh, attr) | |
496 |
|
480 | |||
497 | def __setattr__(self, attr, value): |
|
481 | def __setattr__(self, attr, value): | |
498 | return setattr(self._origfh, attr, value) |
|
482 | return setattr(self._origfh, attr, value) | |
499 |
|
483 | |||
500 | def __delattr__(self, attr): |
|
484 | def __delattr__(self, attr): | |
501 | return delattr(self._origfh, attr) |
|
485 | return delattr(self._origfh, attr) | |
502 |
|
486 | |||
503 | def __enter__(self): |
|
487 | def __enter__(self): | |
504 | return self._origfh.__enter__() |
|
488 | return self._origfh.__enter__() | |
505 |
|
489 | |||
506 | def __exit__(self, exc_type, exc_value, exc_tb): |
|
490 | def __exit__(self, exc_type, exc_value, exc_tb): | |
507 | raise NotImplementedError('attempted instantiating ' + str(type(self))) |
|
491 | raise NotImplementedError('attempted instantiating ' + str(type(self))) | |
508 |
|
492 | |||
509 | def close(self): |
|
493 | def close(self): | |
510 | raise NotImplementedError('attempted instantiating ' + str(type(self))) |
|
494 | raise NotImplementedError('attempted instantiating ' + str(type(self))) | |
511 |
|
495 | |||
512 | class delayclosedfile(closewrapbase): |
|
496 | class delayclosedfile(closewrapbase): | |
513 | """Proxy for a file object whose close is delayed. |
|
497 | """Proxy for a file object whose close is delayed. | |
514 |
|
498 | |||
515 | Do not instantiate outside of the vfs layer. |
|
499 | Do not instantiate outside of the vfs layer. | |
516 | """ |
|
500 | """ | |
517 | def __init__(self, fh, closer): |
|
501 | def __init__(self, fh, closer): | |
518 | super(delayclosedfile, self).__init__(fh) |
|
502 | super(delayclosedfile, self).__init__(fh) | |
519 | object.__setattr__(self, r'_closer', closer) |
|
503 | object.__setattr__(self, r'_closer', closer) | |
520 |
|
504 | |||
521 | def __exit__(self, exc_type, exc_value, exc_tb): |
|
505 | def __exit__(self, exc_type, exc_value, exc_tb): | |
522 | self._closer.close(self._origfh) |
|
506 | self._closer.close(self._origfh) | |
523 |
|
507 | |||
524 | def close(self): |
|
508 | def close(self): | |
525 | self._closer.close(self._origfh) |
|
509 | self._closer.close(self._origfh) | |
526 |
|
510 | |||
527 | class backgroundfilecloser(object): |
|
511 | class backgroundfilecloser(object): | |
528 | """Coordinates background closing of file handles on multiple threads.""" |
|
512 | """Coordinates background closing of file handles on multiple threads.""" | |
529 | def __init__(self, ui, expectedcount=-1): |
|
513 | def __init__(self, ui, expectedcount=-1): | |
530 | self._running = False |
|
514 | self._running = False | |
531 | self._entered = False |
|
515 | self._entered = False | |
532 | self._threads = [] |
|
516 | self._threads = [] | |
533 | self._threadexception = None |
|
517 | self._threadexception = None | |
534 |
|
518 | |||
535 | # Only Windows/NTFS has slow file closing. So only enable by default |
|
519 | # Only Windows/NTFS has slow file closing. So only enable by default | |
536 | # on that platform. But allow to be enabled elsewhere for testing. |
|
520 | # on that platform. But allow to be enabled elsewhere for testing. | |
537 | defaultenabled = pycompat.osname == 'nt' |
|
521 | defaultenabled = pycompat.osname == 'nt' | |
538 | enabled = ui.configbool('worker', 'backgroundclose', defaultenabled) |
|
522 | enabled = ui.configbool('worker', 'backgroundclose', defaultenabled) | |
539 |
|
523 | |||
540 | if not enabled: |
|
524 | if not enabled: | |
541 | return |
|
525 | return | |
542 |
|
526 | |||
543 | # There is overhead to starting and stopping the background threads. |
|
527 | # There is overhead to starting and stopping the background threads. | |
544 | # Don't do background processing unless the file count is large enough |
|
528 | # Don't do background processing unless the file count is large enough | |
545 | # to justify it. |
|
529 | # to justify it. | |
546 | minfilecount = ui.configint('worker', 'backgroundcloseminfilecount') |
|
530 | minfilecount = ui.configint('worker', 'backgroundcloseminfilecount') | |
547 | # FUTURE dynamically start background threads after minfilecount closes. |
|
531 | # FUTURE dynamically start background threads after minfilecount closes. | |
548 | # (We don't currently have any callers that don't know their file count) |
|
532 | # (We don't currently have any callers that don't know their file count) | |
549 | if expectedcount > 0 and expectedcount < minfilecount: |
|
533 | if expectedcount > 0 and expectedcount < minfilecount: | |
550 | return |
|
534 | return | |
551 |
|
535 | |||
552 | maxqueue = ui.configint('worker', 'backgroundclosemaxqueue') |
|
536 | maxqueue = ui.configint('worker', 'backgroundclosemaxqueue') | |
553 | threadcount = ui.configint('worker', 'backgroundclosethreadcount') |
|
537 | threadcount = ui.configint('worker', 'backgroundclosethreadcount') | |
554 |
|
538 | |||
555 | ui.debug('starting %d threads for background file closing\n' % |
|
539 | ui.debug('starting %d threads for background file closing\n' % | |
556 | threadcount) |
|
540 | threadcount) | |
557 |
|
541 | |||
558 | self._queue = util.queue(maxsize=maxqueue) |
|
542 | self._queue = util.queue(maxsize=maxqueue) | |
559 | self._running = True |
|
543 | self._running = True | |
560 |
|
544 | |||
561 | for i in range(threadcount): |
|
545 | for i in range(threadcount): | |
562 | t = threading.Thread(target=self._worker, name='backgroundcloser') |
|
546 | t = threading.Thread(target=self._worker, name='backgroundcloser') | |
563 | self._threads.append(t) |
|
547 | self._threads.append(t) | |
564 | t.start() |
|
548 | t.start() | |
565 |
|
549 | |||
566 | def __enter__(self): |
|
550 | def __enter__(self): | |
567 | self._entered = True |
|
551 | self._entered = True | |
568 | return self |
|
552 | return self | |
569 |
|
553 | |||
570 | def __exit__(self, exc_type, exc_value, exc_tb): |
|
554 | def __exit__(self, exc_type, exc_value, exc_tb): | |
571 | self._running = False |
|
555 | self._running = False | |
572 |
|
556 | |||
573 | # Wait for threads to finish closing so open files don't linger for |
|
557 | # Wait for threads to finish closing so open files don't linger for | |
574 | # longer than lifetime of context manager. |
|
558 | # longer than lifetime of context manager. | |
575 | for t in self._threads: |
|
559 | for t in self._threads: | |
576 | t.join() |
|
560 | t.join() | |
577 |
|
561 | |||
578 | def _worker(self): |
|
562 | def _worker(self): | |
579 | """Main routine for worker thread.""" |
|
563 | """Main routine for worker thread.""" | |
580 | while True: |
|
564 | while True: | |
581 | try: |
|
565 | try: | |
582 | fh = self._queue.get(block=True, timeout=0.100) |
|
566 | fh = self._queue.get(block=True, timeout=0.100) | |
583 | # Need to catch or the thread will terminate and |
|
567 | # Need to catch or the thread will terminate and | |
584 | # we could orphan file descriptors. |
|
568 | # we could orphan file descriptors. | |
585 | try: |
|
569 | try: | |
586 | fh.close() |
|
570 | fh.close() | |
587 | except Exception as e: |
|
571 | except Exception as e: | |
588 | # Stash so can re-raise from main thread later. |
|
572 | # Stash so can re-raise from main thread later. | |
589 | self._threadexception = e |
|
573 | self._threadexception = e | |
590 | except util.empty: |
|
574 | except util.empty: | |
591 | if not self._running: |
|
575 | if not self._running: | |
592 | break |
|
576 | break | |
593 |
|
577 | |||
594 | def close(self, fh): |
|
578 | def close(self, fh): | |
595 | """Schedule a file for closing.""" |
|
579 | """Schedule a file for closing.""" | |
596 | if not self._entered: |
|
580 | if not self._entered: | |
597 | raise error.Abort(_('can only call close() when context manager ' |
|
581 | raise error.Abort(_('can only call close() when context manager ' | |
598 | 'active')) |
|
582 | 'active')) | |
599 |
|
583 | |||
600 | # If a background thread encountered an exception, raise now so we fail |
|
584 | # If a background thread encountered an exception, raise now so we fail | |
601 | # fast. Otherwise we may potentially go on for minutes until the error |
|
585 | # fast. Otherwise we may potentially go on for minutes until the error | |
602 | # is acted on. |
|
586 | # is acted on. | |
603 | if self._threadexception: |
|
587 | if self._threadexception: | |
604 | e = self._threadexception |
|
588 | e = self._threadexception | |
605 | self._threadexception = None |
|
589 | self._threadexception = None | |
606 | raise e |
|
590 | raise e | |
607 |
|
591 | |||
608 | # If we're not actively running, close synchronously. |
|
592 | # If we're not actively running, close synchronously. | |
609 | if not self._running: |
|
593 | if not self._running: | |
610 | fh.close() |
|
594 | fh.close() | |
611 | return |
|
595 | return | |
612 |
|
596 | |||
613 | self._queue.put(fh, block=True, timeout=None) |
|
597 | self._queue.put(fh, block=True, timeout=None) | |
614 |
|
598 | |||
615 | class checkambigatclosing(closewrapbase): |
|
599 | class checkambigatclosing(closewrapbase): | |
616 | """Proxy for a file object, to avoid ambiguity of file stat |
|
600 | """Proxy for a file object, to avoid ambiguity of file stat | |
617 |
|
601 | |||
618 | See also util.filestat for detail about "ambiguity of file stat". |
|
602 | See also util.filestat for detail about "ambiguity of file stat". | |
619 |
|
603 | |||
620 | This proxy is useful only if the target file is guarded by any |
|
604 | This proxy is useful only if the target file is guarded by any | |
621 | lock (e.g. repo.lock or repo.wlock) |
|
605 | lock (e.g. repo.lock or repo.wlock) | |
622 |
|
606 | |||
623 | Do not instantiate outside of the vfs layer. |
|
607 | Do not instantiate outside of the vfs layer. | |
624 | """ |
|
608 | """ | |
625 | def __init__(self, fh): |
|
609 | def __init__(self, fh): | |
626 | super(checkambigatclosing, self).__init__(fh) |
|
610 | super(checkambigatclosing, self).__init__(fh) | |
627 | object.__setattr__(self, r'_oldstat', util.filestat.frompath(fh.name)) |
|
611 | object.__setattr__(self, r'_oldstat', util.filestat.frompath(fh.name)) | |
628 |
|
612 | |||
629 | def _checkambig(self): |
|
613 | def _checkambig(self): | |
630 | oldstat = self._oldstat |
|
614 | oldstat = self._oldstat | |
631 | if oldstat.stat: |
|
615 | if oldstat.stat: | |
632 | newstat = util.filestat.frompath(self._origfh.name) |
|
616 | newstat = util.filestat.frompath(self._origfh.name) | |
633 | if newstat.isambig(oldstat): |
|
617 | if newstat.isambig(oldstat): | |
634 | # stat of changed file is ambiguous to original one |
|
618 | # stat of changed file is ambiguous to original one | |
635 | newstat.avoidambig(self._origfh.name, oldstat) |
|
619 | newstat.avoidambig(self._origfh.name, oldstat) | |
636 |
|
620 | |||
637 | def __exit__(self, exc_type, exc_value, exc_tb): |
|
621 | def __exit__(self, exc_type, exc_value, exc_tb): | |
638 | self._origfh.__exit__(exc_type, exc_value, exc_tb) |
|
622 | self._origfh.__exit__(exc_type, exc_value, exc_tb) | |
639 | self._checkambig() |
|
623 | self._checkambig() | |
640 |
|
624 | |||
641 | def close(self): |
|
625 | def close(self): | |
642 | self._origfh.close() |
|
626 | self._origfh.close() | |
643 | self._checkambig() |
|
627 | self._checkambig() |
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