/[meta-cvs]/meta-cvs/F-B3689DBB46386B16F4B2331934B69223
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Contents of /meta-cvs/F-B3689DBB46386B16F4B2331934B69223

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Revision 1.92.2.1 - (show annotations)
Sun Aug 25 19:53:16 2002 UTC (11 years, 7 months ago) by kaz
Branch: symlink-branch
CVS Tags: symlink-branch~merged-to-HEAD-0
Changes since 1.92: +19 -0 lines
Add text about symbolic links.
1 Release Notes for Meta-CVS
2
3 Release 0.22, 2002-08-??:
4
5 Symbolic links are now versioned objects. The format of the MAP file
6 changes to accomodate this; the new Meta-CVS will read old MAP
7 files; when it writes it will write the new format. Old Meta-CVS won't
8 read the new format.
9
10 When a new module is created from an existing file tree, symbolic
11 links will be recognized and added. The add command will also add
12 symbolic links. Symbolic links can be renamed and moved; this does
13 nothing with their contents. They can point outside of the sandbox
14 using relative or absolute paths.
15
16 There doesn't exist yet a special command to create symbolic links, nor to
17 retarget them; retargetting a link can be done manually by editing MCVS/MAP
18 and updating. Retargetting a link using the ln -s command, won't
19 backpropagate to the MAP file; an update will clobber the link. This is a
20 TODO item.
21
22 Release 0.21, 2002-08-04:
23
24 Syntax of grab command changed. The branch is no longer specified as an
25 argument, but using the -r command option. If no revision is specified with
26 -r, then a -A must be specified to make the grab go to the main trunk. This
27 is a safety feature, since grabbing foreign snapshots to the trunk is almost
28 always wrong, though it could be useful during backup recovery, or for fixing
29 mistakes.
30
31 The way operating system functions are targetted has changed. Instead of
32 relying on the ``linuxlibc6'' module provided by CLISP, Meta-CVS now
33 has its own module for calling foreign functions. This module is portable;
34 it does not depend on the layout of glibc data structures. So Meta-CVS
35 is in theory now portable to other Unixes (provided they have /dev/urandom).
36
37 Release 0.20, 2002-07-27:
38
39 The commit command does a true global commit when given no file or directory
40 parameters, and not given the --metaonly option. This means commiting all
41 changes in the MCVS directory, even if they are in F-files that are not
42 currently mapped.
43
44 Release 0.19, 2002-07-16:
45
46 When moving multiple files or directories to a subdirectory, a
47 restart is now provided to skip over bad ones and continue.
48
49 Grab no longer scans files if there are only added files, or only removed
50 files. There are no moves to deduce in that case.
51
52 Restore properly creates lost+found at the root of a partial sandbox,
53 rather than at the abstract root of the module.
54
55 Some other algorithmic improvements made.
56
57 The first few sections of a user guide have been written.
58
59 Release 0.18, 2002-07-07:
60
61 Cool new feature: checkout takes an extra argument, which specifies a
62 subdirectory of the project. Specifying a subdirectory results in a ``partial
63 sandbox'', whose root directory is the specified subdirectory of the larger
64 project. The rest of the project is ``invisible'' to that sandbox. A
65 subdirectory argument can also be given to mcvs grab, which will cause it to
66 integrate the new source tree against a subtree of the Meta-CVS project
67 rather than the entire project. The subtree doesn't have to exist; in
68 that case you get an empty sandbox. Adding files to this sandbox will cause
69 the tree to exist in the project.
70
71 Bugfix: mcvs grab was not computing moves properly over small file sets,
72 wrongly treating them as removes and adds.
73
74 Release 0.17, 2002-07-02:
75
76 The create command no longer takes a vendor branch. Instead the symbol
77 ``Created-by-Meta-CVS'' is used as the vendor tag to satisfy CVS.
78
79 The grab command no longer does useless synchronization on files that
80 are about to be deleted.
81
82 New purge command; does ``cvs rm'' on deleted files, that is to say, F- files
83 that have no mapping.
84
85 New restore command; re-enters deleted files into the mapping, under
86 the ``lost+found'' directory, using their F- names as sandbox names.
87
88 Bugfix: when a checkout bails because it is requested over top of an existing
89 working copy, it must not delete that working copy's MCVS sub directory.
90
91 Release 0.16, 2002-06-29:
92
93 Added new heuristics to grab command. Paths are analyzed to determine
94 move distance. Greater distances reduce the confidence in a move.
95 These rules help sort out grabs in a project where similar or
96 duplicate files are subject to parallel moves, the ambiguity being
97 resolved by favoring shorter moves. Word comparisons are case-insensitive
98 now. Common words (those that appear in many files) are ignored when
99 comparing files.
100
101 New options, --meta and --metaonly. This area of Meta-CVS is cleaned
102 up a little bit. Most reporting commands like log or diff no longer
103 operate on meta files by default; they must be explicitly told to do
104 so with --meta or --metaonly. Only the commit command implicitly includes
105 metafiles by default, and so if this is not wanted, --nometa must be
106 selected. The update command remains special; if it is given file
107 arguments, it does not include meta files. If given no arguments, it
108 does a global CVS up across the entire project.
109
110 Release 0.15, 2002-06-25:
111
112 Optimized a string splitting routine which is used heavily for processing
113 paths; the result is a noticeable performance improvement in some commands
114 that process large numbers of files.
115
116 Renamed ``import'' command to ``create''.
117
118 Bugfix: checkout and create showed errors when removing directory, due to
119 broken :postorder support in directory walking function.
120
121 Bugfix: on failure, checkout was failing to delete the MCVS directory when
122 the checkout was directed to an existing directory.
123
124 New feature: ``mcvs grab'' command imports third-party snapshots to a
125 branch. This is invoked in the root directory of the source tree to import.
126 It determines what files have been added and removed in the snapshot, and
127 tries to compute which removes and adds are actually moves. This is done by
128 analyzing the actual contents of the files according to a crude algorithm to
129 do fuzzy comparisons, so that even files which were modified as well as moved
130 are discovered.
131
132 Release 0.14, 2002-06-21:
133
134 Bugfix: mcvs add was broken for files that have no suffix, causing
135 the underlying cvs add to fail. This was broken in 0.7 when type
136 handling was added.
137
138 Release 0.13, 2002-06-06:
139
140 Sandbox synchronization now handles the case of two files having
141 the same timestamp. An error is signaled, with interactive resolution
142 to synchronize either way, or do nothing.
143
144 If a file must be deleted on update, and this cannot be done, it
145 is now a continuable error.
146
147 Bugfix: pass -I ! to cvs import so that it won't ignore some F- files
148 whose suffix is one of the ones cvs ignores by default.
149
150 New command: mcvs remap. The user can move or delete files directly without
151 going through Meta-CVS. When mcvs remap is invoked, it will hunt down the
152 moves and deletions, and reconstruct the mapping accordingly; that is,
153 it remaps the new structure. This command uses inode numbers to identify
154 files; if a file is copied and then the original is deleted, that won't
155 be recognized as a move.
156
157 Release 0.12, 2002-04-18:
158
159 Bugfix: remove was broken in 0.10, fixed now.
160
161 Bugfix: status, diff, etc. work in empty project rather than complaining
162 ``. not known to Meta-CVS''.
163
164 The checkout operation now can now populate an existing directory, including
165 the current working directory (mcvs co -d . modulename). Of course, the
166 target directory cannot be an existing Meta-CVS sandbox.
167 This is a useful feature, which allows sandboxes to blend with an
168 existing directory structure.
169
170 Checkout now uses the same function for generating the sandbox
171 structure as does update. This is now necessary, because local files
172 can be clobbered by the checkout.
173
174 Release 0.11, 2002-04-12:
175
176 Bugfix: when branch invokes rtag, it now takes the CVSROOT information
177 from CVS/Root and passes it via -d. This is necessary because rtag does not
178 look at a local CVS subdirectory for this information, only the
179 -d option or the environment variable.
180
181 Command for listing branches added (list-branches or lb). Also shows
182 what sticky tag the sandbox is updated to.
183
184 Command for switching branches added (switch or sw).
185
186 Merge detects that working copy is on non-branch tag and bails.
187
188 Absolute paths can now be specified as file arguments. These are
189 based from the root directory of the sandbox, not the actual filesystem root
190 directory.
191
192 Release 0.10, 2002-04-03:
193
194 Automatic merging implemented. Branch is created using branch command,
195 and merging from another branch is done using simple merge command.
196 Meta-CVS maintains the tags to keep track of what has been merged
197 from what branch to what branch.
198
199 Bugfix: checkout -d foo bar was complaining about directory bar already
200 existing, even though it should only care about foo.
201
202 The remove command now requires explicit -R option to recursively remove
203 a directory. It has more detailed error reporting.
204
205 The move command has better error reporting.
206
207 Release 0.9, 2002-03-14:
208
209 Bugfix: the .cvsignore file is now subject to tagging, status, etc,
210 (unless --nometa is specified, of course).
211
212 The mcvs filt command takes -r <revision> or -D <date> parameters.
213 This means to retrieve the MAP file as of the specified revision or
214 date and use that mapping to perform the filtering translation,
215 rather than using MAP-LOCAL.
216
217 The mcvs update command takes filename arguments now and also
218 supports the -p option.
219
220 Release 0.8, 2002-03-13:
221
222 Bug fixed in mcvs add; it was not ignoring files that are already
223 listed as :ignore in MCVS/TYPES.
224
225 Bug fixed in mcvs move: a target with a trailing slash is now treated
226 as a directory (if it does not already exist and is a non-directory).
227
228 The -d option of mcvs checkout can now be used to override the checkout
229 directory, which is normally the same as the module name.
230
231 The global options --version, --help, -q, -Q and -e are now supported.
232
233 New global options --error-continue and --error-terminate to disable
234 interactive error handling in two different ways.
235
236 Log level of many messages has changed; many messages have been
237 relegated to debug level.
238
239 The import command now creates a .cvsignore file containing the name
240 MAP-LOCAL.
241
242 Release 0.7, 2002-03-09:
243
244 The import command collects a list of the file suffixes and brings up
245 a text editor to allow the user to edit their CVS keyword expansion
246 behavior. This information is kept in a new metafile called TYPES. The
247 add command also updates TYPES; it identifies any suffixes which are new,
248 and brings up an editor. The F- files now carry suffixes, which
249 simplifies interfacing with CVS, and also allows cvswrappers to work.
250
251 Recursive add works (mcvs add -R ...).
252
253 New command line option --nometa allows metafiles to be excluded from
254 diff, tag, and other commands; without the option they are inserted
255 into the list of files to be processed.
256
257 The commit option now takes an optional list of files or directories,
258 just like tag, diff, and others.
259
260 Release 0.6, 2002-02-16:
261
262 The add operation was horribly broken in 0.5, it is fixed.
263
264 User can interactively select whether to clobber local files or leave
265 everything alone. Effects on the mapping file of a mcvs move are undone,
266 if the restructuring is rolled back, or raises a condition that leads
267 to termination.
268
269 Meta-CVS now keeps a new meta-file called MCVS/TYPES. This is created
270 during import, and specifies the CVS keyword expansion mode for files
271 having given suffixes, and can also tell Meta-CVS to ignore certain files
272 when importing or adding.
273
274 Release 0.5, 2002-02-10:
275
276 Much improved error handling. Filesystem rearranging code performs
277 sanity checks to prevent adds and moves from accidentally clobbering
278 local files. A rearranging gone bad can be rolled back. Effects
279 of a failed mcvs add can also be rolled back.
280
281 MAP-LOCAL is now sorted in the same way as MAP.
282
283 Release 0.4, 2002-02-04:
284
285 CVS is invoked using internal function resembling the xargs utility,
286 which ensures that multiple command lines are generated if necessary to
287 avoid surpassing the operating system limit on argument and environment
288 vector size. This is important when someone wants to diff or stat a
289 subdirectory, which requires Meta-CVS to pick out the individual files
290 at the CVS level.
291
292 The tag, log, status and annotate commands are now available.
293
294 The MAP file is sorted on F- file names now, not path names. This
295 improves merging, since files do not move within the file when
296 they are renamed.
297
298 Release 0.3, 2002-02-02:
299
300 Process termination done is properly in top level handler, by a nonlocal
301 exit. The program properly indicates failed termination when it exits
302 due to an error condition.
303
304 Corrections are made in the command line option processing. If z is an
305 option that takes an argument, and the argument is -zx, then x is
306 treated as the argument to the option. Long options arguments are
307 recognized properly, according to the --opt=arg convention. The option
308 processing is restructured. Most of the commands now take the
309 appropriate cvs command-specific options.
310
311 The update algorithm performs dupe checking over the map, which could
312 happen during a merge.
313
314 Some more bugfixing has been done to the move command. It was still not
315 handling right some cases of an unversioned file being clobbered. Also,
316 it wasn't renaming a directory containing just one file.
317
318 I did some performance investigation for larger file sets, and
319 ended up rewriting the code that computes filesystem restructuring
320 changes and map duplicates.
321
322 Release 0.2, 2002-01-30:
323
324 Changed official name from MCVS to Meta-CVS. The move command now
325 performs some filesystem tests so it does the right thing when a versioned
326 file is moved over a non-versioned file, or when a file is moved into
327 a directory not known to Meta-CVS. Factored out reading and writing of
328 map files into functions.
329
330 Release 0.1, 2002-01-28:
331
332 Support for mcvs diff -u added. The -R option works for mcvs add command.
333 Bug fixed in mcvs mv command; it wasn't working analogously to the Unix
334 mv command when copying a directory to an existing directory.
335
336 Release 0.0, 2002-01-27:
337
338 This is alpha software. It is not complete, and lacks documentation.
339 However, it is already usable in its present state and is being used for
340 version control by its author. If you can program in Common Lisp and would
341 like to help, take a look through the TODO file. Send me patches, ideas,
342 feature requests.

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