24 command = registrar.command(cmdtable) |
24 command = registrar.command(cmdtable) |
25 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for |
25 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for |
26 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
26 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
27 # be specifying the version(s) of Mercurial they are tested with, or |
27 # be specifying the version(s) of Mercurial they are tested with, or |
28 # leave the attribute unspecified. |
28 # leave the attribute unspecified. |
29 testedwith = 'ships-with-hg-core' |
29 testedwith = b'ships-with-hg-core' |
30 |
30 |
31 |
31 |
32 @command('relink', [], _('[ORIGIN]'), helpcategory=command.CATEGORY_MAINTENANCE) |
32 @command( |
|
33 b'relink', [], _(b'[ORIGIN]'), helpcategory=command.CATEGORY_MAINTENANCE |
|
34 ) |
33 def relink(ui, repo, origin=None, **opts): |
35 def relink(ui, repo, origin=None, **opts): |
34 """recreate hardlinks between two repositories |
36 """recreate hardlinks between two repositories |
35 |
37 |
36 When repositories are cloned locally, their data files will be |
38 When repositories are cloned locally, their data files will be |
37 hardlinked so that they only use the space of a single repository. |
39 hardlinked so that they only use the space of a single repository. |
53 |
55 |
54 Do not attempt any read operations on this repository while the |
56 Do not attempt any read operations on this repository while the |
55 command is running. (Both repositories will be locked against |
57 command is running. (Both repositories will be locked against |
56 writes.) |
58 writes.) |
57 """ |
59 """ |
58 if not util.safehasattr(util, 'samefile') or not util.safehasattr( |
60 if not util.safehasattr(util, b'samefile') or not util.safehasattr( |
59 util, 'samedevice' |
61 util, b'samedevice' |
60 ): |
62 ): |
61 raise error.Abort(_('hardlinks are not supported on this system')) |
63 raise error.Abort(_(b'hardlinks are not supported on this system')) |
62 src = hg.repository( |
64 src = hg.repository( |
63 repo.baseui, |
65 repo.baseui, |
64 ui.expandpath(origin or 'default-relink', origin or 'default'), |
66 ui.expandpath(origin or b'default-relink', origin or b'default'), |
65 ) |
67 ) |
66 ui.status(_('relinking %s to %s\n') % (src.store.path, repo.store.path)) |
68 ui.status(_(b'relinking %s to %s\n') % (src.store.path, repo.store.path)) |
67 if repo.root == src.root: |
69 if repo.root == src.root: |
68 ui.status(_('there is nothing to relink\n')) |
70 ui.status(_(b'there is nothing to relink\n')) |
69 return |
71 return |
70 |
72 |
71 if not util.samedevice(src.store.path, repo.store.path): |
73 if not util.samedevice(src.store.path, repo.store.path): |
72 # No point in continuing |
74 # No point in continuing |
73 raise error.Abort(_('source and destination are on different devices')) |
75 raise error.Abort(_(b'source and destination are on different devices')) |
74 |
76 |
75 with repo.lock(), src.lock(): |
77 with repo.lock(), src.lock(): |
76 candidates = sorted(collect(src, ui)) |
78 candidates = sorted(collect(src, ui)) |
77 targets = prune(candidates, src.store.path, repo.store.path, ui) |
79 targets = prune(candidates, src.store.path, repo.store.path, ui) |
78 do_relink(src.store.path, repo.store.path, targets, ui) |
80 do_relink(src.store.path, repo.store.path, targets, ui) |
79 |
81 |
80 |
82 |
81 def collect(src, ui): |
83 def collect(src, ui): |
82 seplen = len(os.path.sep) |
84 seplen = len(os.path.sep) |
83 candidates = [] |
85 candidates = [] |
84 live = len(src['tip'].manifest()) |
86 live = len(src[b'tip'].manifest()) |
85 # Your average repository has some files which were deleted before |
87 # Your average repository has some files which were deleted before |
86 # the tip revision. We account for that by assuming that there are |
88 # the tip revision. We account for that by assuming that there are |
87 # 3 tracked files for every 2 live files as of the tip version of |
89 # 3 tracked files for every 2 live files as of the tip version of |
88 # the repository. |
90 # the repository. |
89 # |
91 # |
90 # mozilla-central as of 2010-06-10 had a ratio of just over 7:5. |
92 # mozilla-central as of 2010-06-10 had a ratio of just over 7:5. |
91 total = live * 3 // 2 |
93 total = live * 3 // 2 |
92 src = src.store.path |
94 src = src.store.path |
93 progress = ui.makeprogress(_('collecting'), unit=_('files'), total=total) |
95 progress = ui.makeprogress(_(b'collecting'), unit=_(b'files'), total=total) |
94 pos = 0 |
96 pos = 0 |
95 ui.status( |
97 ui.status( |
96 _("tip has %d files, estimated total number of files: %d\n") |
98 _(b"tip has %d files, estimated total number of files: %d\n") |
97 % (live, total) |
99 % (live, total) |
98 ) |
100 ) |
99 for dirpath, dirnames, filenames in os.walk(src): |
101 for dirpath, dirnames, filenames in os.walk(src): |
100 dirnames.sort() |
102 dirnames.sort() |
101 relpath = dirpath[len(src) + seplen :] |
103 relpath = dirpath[len(src) + seplen :] |
102 for filename in sorted(filenames): |
104 for filename in sorted(filenames): |
103 if filename[-2:] not in ('.d', '.i'): |
105 if filename[-2:] not in (b'.d', b'.i'): |
104 continue |
106 continue |
105 st = os.stat(os.path.join(dirpath, filename)) |
107 st = os.stat(os.path.join(dirpath, filename)) |
106 if not stat.S_ISREG(st.st_mode): |
108 if not stat.S_ISREG(st.st_mode): |
107 continue |
109 continue |
108 pos += 1 |
110 pos += 1 |
109 candidates.append((os.path.join(relpath, filename), st)) |
111 candidates.append((os.path.join(relpath, filename), st)) |
110 progress.update(pos, item=filename) |
112 progress.update(pos, item=filename) |
111 |
113 |
112 progress.complete() |
114 progress.complete() |
113 ui.status(_('collected %d candidate storage files\n') % len(candidates)) |
115 ui.status(_(b'collected %d candidate storage files\n') % len(candidates)) |
114 return candidates |
116 return candidates |
115 |
117 |
116 |
118 |
117 def prune(candidates, src, dst, ui): |
119 def prune(candidates, src, dst, ui): |
118 def linkfilter(src, dst, st): |
120 def linkfilter(src, dst, st): |
124 if util.samefile(src, dst): |
126 if util.samefile(src, dst): |
125 return False |
127 return False |
126 if not util.samedevice(src, dst): |
128 if not util.samedevice(src, dst): |
127 # No point in continuing |
129 # No point in continuing |
128 raise error.Abort( |
130 raise error.Abort( |
129 _('source and destination are on different devices') |
131 _(b'source and destination are on different devices') |
130 ) |
132 ) |
131 if st.st_size != ts.st_size: |
133 if st.st_size != ts.st_size: |
132 return False |
134 return False |
133 return st |
135 return st |
134 |
136 |
135 targets = [] |
137 targets = [] |
136 progress = ui.makeprogress( |
138 progress = ui.makeprogress( |
137 _('pruning'), unit=_('files'), total=len(candidates) |
139 _(b'pruning'), unit=_(b'files'), total=len(candidates) |
138 ) |
140 ) |
139 pos = 0 |
141 pos = 0 |
140 for fn, st in candidates: |
142 for fn, st in candidates: |
141 pos += 1 |
143 pos += 1 |
142 srcpath = os.path.join(src, fn) |
144 srcpath = os.path.join(src, fn) |
143 tgt = os.path.join(dst, fn) |
145 tgt = os.path.join(dst, fn) |
144 ts = linkfilter(srcpath, tgt, st) |
146 ts = linkfilter(srcpath, tgt, st) |
145 if not ts: |
147 if not ts: |
146 ui.debug('not linkable: %s\n' % fn) |
148 ui.debug(b'not linkable: %s\n' % fn) |
147 continue |
149 continue |
148 targets.append((fn, ts.st_size)) |
150 targets.append((fn, ts.st_size)) |
149 progress.update(pos, item=fn) |
151 progress.update(pos, item=fn) |
150 |
152 |
151 progress.complete() |
153 progress.complete() |
152 ui.status(_('pruned down to %d probably relinkable files\n') % len(targets)) |
154 ui.status( |
|
155 _(b'pruned down to %d probably relinkable files\n') % len(targets) |
|
156 ) |
153 return targets |
157 return targets |
154 |
158 |
155 |
159 |
156 def do_relink(src, dst, files, ui): |
160 def do_relink(src, dst, files, ui): |
157 def relinkfile(src, dst): |
161 def relinkfile(src, dst): |
158 bak = dst + '.bak' |
162 bak = dst + b'.bak' |
159 os.rename(dst, bak) |
163 os.rename(dst, bak) |
160 try: |
164 try: |
161 util.oslink(src, dst) |
165 util.oslink(src, dst) |
162 except OSError: |
166 except OSError: |
163 os.rename(bak, dst) |
167 os.rename(bak, dst) |
167 CHUNKLEN = 65536 |
171 CHUNKLEN = 65536 |
168 relinked = 0 |
172 relinked = 0 |
169 savedbytes = 0 |
173 savedbytes = 0 |
170 |
174 |
171 progress = ui.makeprogress( |
175 progress = ui.makeprogress( |
172 _('relinking'), unit=_('files'), total=len(files) |
176 _(b'relinking'), unit=_(b'files'), total=len(files) |
173 ) |
177 ) |
174 pos = 0 |
178 pos = 0 |
175 for f, sz in files: |
179 for f, sz in files: |
176 pos += 1 |
180 pos += 1 |
177 source = os.path.join(src, f) |
181 source = os.path.join(src, f) |
178 tgt = os.path.join(dst, f) |
182 tgt = os.path.join(dst, f) |
179 # Binary mode, so that read() works correctly, especially on Windows |
183 # Binary mode, so that read() works correctly, especially on Windows |
180 sfp = open(source, 'rb') |
184 sfp = open(source, b'rb') |
181 dfp = open(tgt, 'rb') |
185 dfp = open(tgt, b'rb') |
182 sin = sfp.read(CHUNKLEN) |
186 sin = sfp.read(CHUNKLEN) |
183 while sin: |
187 while sin: |
184 din = dfp.read(CHUNKLEN) |
188 din = dfp.read(CHUNKLEN) |
185 if sin != din: |
189 if sin != din: |
186 break |
190 break |
187 sin = sfp.read(CHUNKLEN) |
191 sin = sfp.read(CHUNKLEN) |
188 sfp.close() |
192 sfp.close() |
189 dfp.close() |
193 dfp.close() |
190 if sin: |
194 if sin: |
191 ui.debug('not linkable: %s\n' % f) |
195 ui.debug(b'not linkable: %s\n' % f) |
192 continue |
196 continue |
193 try: |
197 try: |
194 relinkfile(source, tgt) |
198 relinkfile(source, tgt) |
195 progress.update(pos, item=f) |
199 progress.update(pos, item=f) |
196 relinked += 1 |
200 relinked += 1 |
197 savedbytes += sz |
201 savedbytes += sz |
198 except OSError as inst: |
202 except OSError as inst: |
199 ui.warn('%s: %s\n' % (tgt, stringutil.forcebytestr(inst))) |
203 ui.warn(b'%s: %s\n' % (tgt, stringutil.forcebytestr(inst))) |
200 |
204 |
201 progress.complete() |
205 progress.complete() |
202 |
206 |
203 ui.status( |
207 ui.status( |
204 _('relinked %d files (%s reclaimed)\n') |
208 _(b'relinked %d files (%s reclaimed)\n') |
205 % (relinked, util.bytecount(savedbytes)) |
209 % (relinked, util.bytecount(savedbytes)) |
206 ) |
210 ) |