/[meta-cvs]/meta-cvs/F-B3689DBB46386B16F4B2331934B69223
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Revision 1.172 - (show annotations)
Thu Apr 24 04:14:41 2003 UTC (10 years, 11 months ago) by kaz
Branch: MAIN
Changes since 1.171: +13 -10 lines
Merging from mcvs-1-0-branch.

Improved error handling again in a flash of sanity. The whole
idea of ``bail'' as a restart is gone. All code which must perform
some complex cleanup action does so as part of normal unwinding.
And so termination becomes safe.

* code/update.lisp (mcvs-update): Change bail restart to continue.

* code/mcvs-main.lisp (*global-options*): Remove "error-bail".
(*usage*): Remove description of --error-bail.
(mcvs-execute): Bind *mcvs-error-treatment* to :terminate rather
than :bail if controlling TTY cannot be opened.

* code/move.lisp (mcvs-move): Change "Undoing move" error message
to "Undoing changes to map".

* code/add.lisp (mcvs-add): Get rid of bail restart; move cleanup
code into unwind-protect block.

* code/error.lisp (*mcvs-error-treatment*): Touch up docstring.
(mcvs-error-handler): Remove anything having to do with :bail.
Change description of `T' command to suggest that it is safe.

* code/options.lisp (filter-mcvs-options): Remove handling of
"error-bail" option.

* code/mapping.lisp (mapping-update): Get rid of outermost
restart-case, which had just a bail restart. Replace it with
unwind-protect block which does exactly the same restoration.
1 Release for Meta-CVS
2
3 Release ?.??, 200?-??-??:
4
5 All Lisp symbols are in a package.
6
7 Release 1.0.7, 2003-0?-??:
8
9 Revamped error recovery logic. To continue in an error situation now
10 consistently means ``take the bold action that may erase data''
11 or ``proceed in the most obvious way to finish the specified job''.
12 It never means ``roll back the operation and bail'', which was
13 confusing.
14
15 Termination is no longer unsafe; the `T' menu command, and the
16 equivalent --error-terminate global option perform all necessary
17 restoration and cleanup.
18
19 Errors that have more information to print, like a list of files or
20 whatever, now indicate it in a standard way which translates to the
21 `I' menu command.
22
23 Chatter output goes to standard error rather than standard output,
24 as do all error messages.
25
26 The interactive error menu now talks to the user using the controlling
27 tty, meaning that it will work even if the input or output of the
28 mcvs command are redirected. If no controlling tty is available,
29 then interactive error handling is disabled; the default behavior
30 is then like --error-terminate but can of course be overridden by
31 --error-continue.
32
33 Release 1.0.6, 2003-04-14:
34
35 The create command detects the existence of text editor backup files (or
36 other junk) in the MCVS directory after the editor is invoked on the
37 TYPES file. The user is prompted regarding their removal. If these files are
38 not removed, cvs import will bring them into the repository.
39
40 When Meta-CVS has to split a large CVS command into two or more
41 invocations with shorter argument lists, it now does not stop when one of
42 these invocations is unsuccessful; it does all of them, and combines
43 their termination indications by a logical AND. There was a bug in this
44 logic also which caused, upon termination failure, a cvs command to be
45 repeated for the same list of files.
46
47 Synchronization logic has been revamped. Unnecessary synchronizations
48 have been removed, which will make some commands run faster.
49 Synchronizations now have specific directions; for instance before
50 a CVS commit or update, changes are pushed from the directory tree to the MCVS
51 directory only, and after the CVS operation, in the reverse direction only.
52
53 Meta-CVS will no longer re-create missing F- files by linking from the
54 directory tree. Doing this causes two problems. One is that if a user
55 manually removes a F- file and do ``mcvs up'', she wants CVS to fetch a clean
56 copy and push it into the tree. She does not want the file to be restored
57 from the tree prior to the CVS update. Secondly, sometimes CVS itself
58 removes files. If we re-create the files, CVS will consider them to
59 be ``in the way''.
60
61 Failures to read from the MAP or MAP-LOCAL files are treated as interactive,
62 continuable errors. By continuing, the user agrees that the behavior will
63 be as if an empty map were read.
64
65 The grab command uses less memory for performing move analysis.
66
67 Release 1.0.5, 2003-02-25:
68
69 Bugfix: some one-argument command line options of CVS must be
70 specifies as a single parameter, with no separation between the
71 option letter and the argument characters. For example:
72
73 cvs log -r rev-1::rev-2 # invalid
74 cvs log -rrev1::rev2 # correct
75
76 Meta-CVS accepts either syntax, but it was generating the first form
77 when calling CVS. Now, *all* one-letter options that have an argument
78 are formatted in the second manner.
79
80 Bugfix: one more waitpid() issue was fixed; on fast machines, under
81 Linux, it was observed that from time to time Meta-CVS would get
82 a -1/ECHILD when waiting for the CVS process.
83
84 Release 1.0.4, 2003-02-20:
85
86 Fix remaining occurences of the CVS ``No child processes'' abort
87 problem, affecting the list-branches command, merge command
88 and the -r option of the filt command.
89
90 Release 1.0.3, 2003-02-12:
91
92 ! THIS RELEASE IS WITHDRAWN. It was accidentally created from the
93 ! experimental main trunk of the Meta-CVS codebase, rather than
94 ! the 1.0 branch. But 1.0.4 does contain all of the changes
95 ! described here.
96
97 Fix for the CVS ``No child processes'' abort problem. It turns out
98 that CLISP sets the signal handling action for the SIGCHLD signal
99 to SIG_IGN, which is inherited by child processes across the
100 fork() and execvp() calls used in our mcvs_spawn() function.
101 We correct the problem by resetting the signal handler to SIG_DFL
102 just before executing the new process image.
103
104 New feature, --up option. The argument is a nonnegative integer value
105 (default is zero) which specifies how many sandbox nesting levels to
106 escape out of when locating the sandbox root. This helps work with
107 nested Meta-CVS sandboxes.
108
109 Release 1.0.2, 2003-02-10:
110
111 Bugfix in waitpid logic in the C library for running external processes;
112 we were not dealing with an interrupted waitpid.
113
114 Behavior of mcvs tag is changed: when there are no filename arguments,
115 the whole tree is tagged including the metafiles. In other words, it
116 now works like the commit command.
117
118 Release 1.0.1, 2003-01-30:
119
120 Hard link sync optimization: update of a subset of files, commit, and
121 other operations like log and diff don't need to synchronize all
122 hard links, just the ones operated on.
123
124 The merge and remerge commands support -k option for overriding
125 CVS keyword expansion mode.
126
127 Fixes to getcwd error handling.
128
129 Improvement in install.sh script's logic for locating CLISP installation
130 directory.
131
132 Release 1.0, 2003-01-01:
133
134 NOTE: It's not possible to upgrade to this release via mcvs-upgrade,
135 because it adds some new C functions to the Lisp executable.
136
137 Security fix: read-time evaluation was not suppressed when reading
138 structured data, like MCVS/MAP and MCVS/TYPES. This means that it
139 was possible for Alice to check in something that would execute
140 arbitrary code on Bob's computer.
141
142 Optimization: use fork and exec to launch CVS rather than CLISP's
143 run-program function, which indirects through the shell interpreter.
144 (On Cygwin, the spawnvp function is used).
145
146 Performance fix: stat() was being called superfluously by the
147 hard synchronization code, twice for each file.
148
149 Build fix: install.sh works when CLISP executable is called ``lisp.exe'',
150 which is the case under Cygwin with newer CLISP releases.
151
152 Release 0.99, 2002-11-17:
153
154 New link command for creating symbolic links.
155
156 Global option -n (dry run---don't modify filesystem) is processed
157 internally now, not just passed to CVS.
158
159 Failure to invoke text editor is handled.
160
161 The -r option of filt is fixed; it has been broken since the change to the
162 new MAP format, because it was reading the raw map representation, not
163 passing it through the right conversion steps that are needed now.
164
165 Bugfix to purge and remap commands: they were fooled by CVS-generated
166 files in the MCVS/CVS directory. Specifically, files having F- names, and a
167 the suffix ,t.
168
169 Bugfix to add logic in directory restructuring: there was the possibility
170 of mistakingly taking a clobbered local file to be a new local version of
171 the added file, instead of replacing it. This could happen if the local
172 file had a future timestamp relative to the one coming from the repository.
173
174 The prop command does not synchronize or write out map if no options are
175 specified.
176
177 Help text added for move and branch commands. Help text for grab rewritten.
178
179 The CVSEDITOR and VISUAL environment variables are now checked, not
180 only EDITOR.
181
182 Release 0.98, 2002-10-13:
183
184 The prop command was mistakenly reading from MAP-LOCAL and writing to MAP,
185 which could cause information loss if the two differ. It now reads from MAP
186 and writes to MAP. (The property changes propagate to MAP-LOCAL by the
187 update operation invoked by prop, as before).
188
189 Invocation of external programs included in debug trace.
190
191 The filt command does not filter F- names if they are immediately preceded by
192 the MCVS/ prefix; such occurences are clearly concrete, sandbox-relative
193 references to the actual F- links, rather than abstract references.
194
195 The update command now supports the -C option, to fetch the repository
196 copy, throwing away local changes. It also now honors the --metaonly
197 and --nometa options.
198
199 The export command has been added, for checking out documents without creating
200 a working copy (no MCVS directory in the root of the checkout).
201
202 The watch command has been added. Note that its syntax differs from that
203 of CVS.
204
205 The watchers, editors, edit, and unedit commands have been added.
206
207 A script called mcvs-upgrade is now included, and installs alongside the mcvs
208 script. This allows the Meta-CVS Lisp image to recompile and patch itself,
209 giving users of binary distributions an easy way to upgrade from source
210 code.
211
212 Release 0.97, 2002-10-06:
213
214 Meta-CVS now builds and runs on Microsoft Windows, under Cygwin
215 (www.cygwin.com). It still relies on hard links, which requires
216 Windows 2000 or XP, and the NTFS filesystem. It probably won't
217 work over FAT.
218
219 New --debug option for verbose output.
220
221 Cleaned up of error messages. Error messages don't specify prefixes like
222 ``mcvs-add:'' or ``mcvs-grab:'' any more. Rather, the error handler adds the
223 ``mcvs:'' prefix when printing the messages in a situation when the error is
224 not continuable.
225
226 Fixed bug introduced in release 0.13: mcvs add -R was adding only
227 directories, effectively ignoring arguments that are regular files.
228 The error-continuation behavior of mcvs add has been revised.
229
230 Trying to rename an object onto itself, or to move the sandbox root
231 directory are no longer silent no-ops, but produce an error.
232
233 The remap command now preserves property lists, and picks up changes
234 in executable permission.
235
236 The grab command now notices when a file changes from having execute
237 permission to not having execute permission.
238
239 Operations on the path . now work in a partial sandbox.
240
241 Release 0.96, 2002-09-21:
242
243 The restore command was left broken during the change to the new
244 filemap format. It is now fixed.
245
246 The grab command now handles execute permission bits properly.
247
248 Some more commands have detailed help.
249
250 There is now a global option -i which specifies a script to be
251 executed. This allows Meta-CVS to be scripted using Lisp. For
252 instance suppose you have the following script and call it
253 list-matching:
254
255 #!/usr/local/bin/mcvs -i
256 (in-sandbox-root-dir
257 (let ((mapping (mapping-read *mcvs-map*))
258 (test-func (eval (read-from-string (pop *args*)))))
259 (dolist (entry mapping)
260 (with-slots (path raw-plist) entry
261 (when (funcall test-func raw-plist)
262 (format t "~a~%" path))))))
263
264 Then to list the names of files whose "importance" property is
265 a value greater than two, run:
266
267 ./list-matching '(lambda (plist)
268 (let ((imp (getf plist :importance)))
269 (and imp (> imp 2))))'
270
271 WARNING: Scripting accesses the guts of Meta-CVS directly, so scripts may
272 break as Meta-CVS is maintained. There is currently no published set of
273 stable interfaces.
274
275 Release 0.95, 2002-09-16:
276
277 The install.sh script no longer uses a borrowed copy of the clisp-link script
278 or the linkkit directory; these have been removed. These materials
279 are available at every CLISP installation; install.sh now finds them
280 and uses them. Users of non-x86 machines ran into problems because of this
281 because linkkit/clisp.h contains architecture-dependent information.
282
283 A bug in mcvs filt was fixed; it wasn't handling F- names that aren't found
284 in the map.
285
286 A more detailed help system now exists, though it's not complete. The ``mcvs
287 help'' command acts just like ``mcvs --help'' without any arguments. If given
288 an additional parameter which specifies a Meta-CVS command, it produces more
289 detailed documentation for that comand. Help exists already for a few
290 commands.
291
292 The release number is being warped to 0.95, which means that Meta-CVS is now
293 in beta. It is only five updates away from a 1.0 release.
294
295 Release 0.24, 2002-09-08:
296
297 The mapping entries for both symlinks and files have extensible property
298 lists now. These are stored in the optional fourth and fifth list elements,
299 respectively of the :FILE and :SYMLINK map entries.
300
301 Versioning of the execute permission of files is supported, represented as
302 the :EXEC property of a :FILE mapping entry.
303
304 Some lame syntax is provided for manipulating properties:
305
306 mcvs prop --set foo --clear bar --remove baz main.c list.c
307
308 will set the property FOO to true, set the property BAR to false,
309 and remove the property BAZ, in the files main.c and list.c.
310 The execute permission is represented by the property EXEC.
311
312 Release 0.23, 2002-09-02:
313
314 Bugfix: the grab command notices edited symlinks and incorporates the
315 changes into the mapping.
316
317 The grab command now figures out moved symlinks. Moved symlinks are those
318 whose pathname has changed, but which continue to point to the same object
319 (which may also have been moved).
320
321 Release 0.22, 2002-08-31:
322
323 Symbolic links are now versioned objects. The format of the MAP file
324 changes to accomodate this; the new Meta-CVS will read old MAP
325 files; when it writes it will write the new format. Old Meta-CVS won't
326 read the new format.
327
328 When a new module is created from an existing file tree, symbolic
329 links will be recognized and added. The add command will also add
330 symbolic links. Symbolic links can be renamed and moved; this does
331 nothing with their contents. They can point outside of the sandbox
332 using relative or absolute paths.
333
334 TODO:
335
336 There doesn't exist yet a special command to create symbolic links, nor to
337 retarget them; retargetting a link can be done manually by editing MCVS/MAP
338 and updating. Retargetting a link using the ln -s command, won't
339 backpropagate to the MAP file; an update will clobber the link.
340
341 The grab command does not yet compute symbolic link moves; a moved symbolic
342 link is treated as a remove and add. This will be easy to fix.
343
344 The remap command ignores symlinks.
345
346 Release 0.21, 2002-08-04:
347
348 Syntax of grab command changed. The branch is no longer specified as an
349 argument, but using the -r command option. If no revision is specified with
350 -r, then a -A must be specified to make the grab go to the main trunk. This
351 is a safety feature, since grabbing foreign snapshots to the trunk is almost
352 always wrong, though it could be useful during backup recovery, or for fixing
353 mistakes.
354
355 The way operating system functions are targetted has changed. Instead of
356 relying on the ``linuxlibc6'' module provided by CLISP, Meta-CVS now
357 has its own module for calling foreign functions. This module is portable;
358 it does not depend on the layout of glibc data structures. So Meta-CVS
359 is in theory now portable to other Unixes (provided they have /dev/urandom).
360
361 Release 0.20, 2002-07-27:
362
363 The commit command does a true global commit when given no file or directory
364 parameters, and not given the --metaonly option. This means commiting all
365 changes in the MCVS directory, even if they are in F-files that are not
366 currently mapped.
367
368 Release 0.19, 2002-07-16:
369
370 When moving multiple files or directories to a subdirectory, a
371 restart is now provided to skip over bad ones and continue.
372
373 Grab no longer scans files if there are only added files, or only removed
374 files. There are no moves to deduce in that case.
375
376 Restore properly creates lost+found at the root of a partial sandbox,
377 rather than at the abstract root of the module.
378
379 Some other algorithmic improvements made.
380
381 The first few sections of a user guide have been written.
382
383 Release 0.18, 2002-07-07:
384
385 Cool new feature: checkout takes an extra argument, which specifies a
386 subdirectory of the project. Specifying a subdirectory results in a ``partial
387 sandbox'', whose root directory is the specified subdirectory of the larger
388 project. The rest of the project is ``invisible'' to that sandbox. A
389 subdirectory argument can also be given to mcvs grab, which will cause it to
390 integrate the new source tree against a subtree of the Meta-CVS project
391 rather than the entire project. The subtree doesn't have to exist; in
392 that case you get an empty sandbox. Adding files to this sandbox will cause
393 the tree to exist in the project.
394
395 Bugfix: mcvs grab was not computing moves properly over small file sets,
396 wrongly treating them as removes and adds.
397
398 Release 0.17, 2002-07-02:
399
400 The create command no longer takes a vendor branch. Instead the symbol
401 ``Created-by-Meta-CVS'' is used as the vendor tag to satisfy CVS.
402
403 The grab command no longer does useless synchronization on files that
404 are about to be deleted.
405
406 New purge command; does ``cvs rm'' on deleted files, that is to say, F- files
407 that have no mapping.
408
409 New restore command; re-enters deleted files into the mapping, under
410 the ``lost+found'' directory, using their F- names as sandbox names.
411
412 Bugfix: when a checkout bails because it is requested over top of an existing
413 working copy, it must not delete that working copy's MCVS sub directory.
414
415 Release 0.16, 2002-06-29:
416
417 Added new heuristics to grab command. Paths are analyzed to determine
418 move distance. Greater distances reduce the confidence in a move.
419 These rules help sort out grabs in a project where similar or
420 duplicate files are subject to parallel moves, the ambiguity being
421 resolved by favoring shorter moves. Word comparisons are case-insensitive
422 now. Common words (those that appear in many files) are ignored when
423 comparing files.
424
425 New options, --meta and --metaonly. This area of Meta-CVS is cleaned
426 up a little bit. Most reporting commands like log or diff no longer
427 operate on meta files by default; they must be explicitly told to do
428 so with --meta or --metaonly. Only the commit command implicitly includes
429 metafiles by default, and so if this is not wanted, --nometa must be
430 selected. The update command remains special; if it is given file
431 arguments, it does not include meta files. If given no arguments, it
432 does a global CVS up across the entire project.
433
434 Release 0.15, 2002-06-25:
435
436 Optimized a string splitting routine which is used heavily for processing
437 paths; the result is a noticeable performance improvement in some commands
438 that process large numbers of files.
439
440 Renamed ``import'' command to ``create''.
441
442 Bugfix: checkout and create showed errors when removing directory, due to
443 broken :postorder support in directory walking function.
444
445 Bugfix: on failure, checkout was failing to delete the MCVS directory when
446 the checkout was directed to an existing directory.
447
448 New feature: ``mcvs grab'' command imports third-party snapshots to a
449 branch. This is invoked in the root directory of the source tree to import.
450 It determines what files have been added and removed in the snapshot, and
451 tries to compute which removes and adds are actually moves. This is done by
452 analyzing the actual contents of the files according to a crude algorithm to
453 do fuzzy comparisons, so that even files which were modified as well as moved
454 are discovered.
455
456 Release 0.14, 2002-06-21:
457
458 Bugfix: mcvs add was broken for files that have no suffix, causing
459 the underlying cvs add to fail. This was broken in 0.7 when type
460 handling was added.
461
462 Release 0.13, 2002-06-06:
463
464 Sandbox synchronization now handles the case of two files having
465 the same timestamp. An error is signaled, with interactive resolution
466 to synchronize either way, or do nothing.
467
468 If a file must be deleted on update, and this cannot be done, it
469 is now a continuable error.
470
471 Bugfix: pass -I ! to cvs import so that it won't ignore some F- files
472 whose suffix is one of the ones cvs ignores by default.
473
474 New command: mcvs remap. The user can move or delete files directly without
475 going through Meta-CVS. When mcvs remap is invoked, it will hunt down the
476 moves and deletions, and reconstruct the mapping accordingly; that is,
477 it remaps the new structure. This command uses inode numbers to identify
478 files; if a file is copied and then the original is deleted, that won't
479 be recognized as a move.
480
481 Release 0.12, 2002-04-18:
482
483 Bugfix: remove was broken in 0.10, fixed now.
484
485 Bugfix: status, diff, etc. work in empty project rather than complaining
486 ``. not known to Meta-CVS''.
487
488 The checkout operation now can now populate an existing directory, including
489 the current working directory (mcvs co -d . modulename). Of course, the
490 target directory cannot be an existing Meta-CVS sandbox.
491 This is a useful feature, which allows sandboxes to blend with an
492 existing directory structure.
493
494 Checkout now uses the same function for generating the sandbox
495 structure as does update. This is now necessary, because local files
496 can be clobbered by the checkout.
497
498 Release 0.11, 2002-04-12:
499
500 Bugfix: when branch invokes rtag, it now takes the CVSROOT information
501 from CVS/Root and passes it via -d. This is necessary because rtag does not
502 look at a local CVS subdirectory for this information, only the
503 -d option or the environment variable.
504
505 Command for listing branches added (list-branches or lb). Also shows
506 what sticky tag the sandbox is updated to.
507
508 Command for switching branches added (switch or sw).
509
510 Merge detects that working copy is on non-branch tag and bails.
511
512 Absolute paths can now be specified as file arguments. These are
513 based from the root directory of the sandbox, not the actual filesystem root
514 directory.
515
516 Release 0.10, 2002-04-03:
517
518 Automatic merging implemented. Branch is created using branch command,
519 and merging from another branch is done using simple merge command.
520 Meta-CVS maintains the tags to keep track of what has been merged
521 from what branch to what branch.
522
523 Bugfix: checkout -d foo bar was complaining about directory bar already
524 existing, even though it should only care about foo.
525
526 The remove command now requires explicit -R option to recursively remove
527 a directory. It has more detailed error reporting.
528
529 The move command has better error reporting.
530
531 Release 0.9, 2002-03-14:
532
533 Bugfix: the .cvsignore file is now subject to tagging, status, etc,
534 (unless --nometa is specified, of course).
535
536 The mcvs filt command takes -r <revision> or -D <date> parameters.
537 This means to retrieve the MAP file as of the specified revision or
538 date and use that mapping to perform the filtering translation,
539 rather than using MAP-LOCAL.
540
541 The mcvs update command takes filename arguments now and also
542 supports the -p option.
543
544 Release 0.8, 2002-03-13:
545
546 Bug fixed in mcvs add; it was not ignoring files that are already
547 listed as :ignore in MCVS/TYPES.
548
549 Bug fixed in mcvs move: a target with a trailing slash is now treated
550 as a directory (if it does not already exist and is a non-directory).
551
552 The -d option of mcvs checkout can now be used to override the checkout
553 directory, which is normally the same as the module name.
554
555 The global options --version, --help, -q, -Q and -e are now supported.
556
557 New global options --error-continue and --error-terminate to disable
558 interactive error handling in two different ways.
559
560 Log level of many messages has changed; many messages have been
561 relegated to debug level.
562
563 The import command now creates a .cvsignore file containing the name
564 MAP-LOCAL.
565
566 Release 0.7, 2002-03-09:
567
568 The import command collects a list of the file suffixes and brings up
569 a text editor to allow the user to edit their CVS keyword expansion
570 behavior. This information is kept in a new metafile called TYPES. The
571 add command also updates TYPES; it identifies any suffixes which are new,
572 and brings up an editor. The F- files now carry suffixes, which
573 simplifies interfacing with CVS, and also allows cvswrappers to work.
574
575 Recursive add works (mcvs add -R ...).
576
577 New command line option --nometa allows metafiles to be excluded from
578 diff, tag, and other commands; without the option they are inserted
579 into the list of files to be processed.
580
581 The commit option now takes an optional list of files or directories,
582 just like tag, diff, and others.
583
584 Release 0.6, 2002-02-16:
585
586 The add operation was horribly broken in 0.5, it is fixed.
587
588 User can interactively select whether to clobber local files or leave
589 everything alone. Effects on the mapping file of a mcvs move are undone,
590 if the restructuring is rolled back, or raises a condition that leads
591 to termination.
592
593 Meta-CVS now keeps a new meta-file called MCVS/TYPES. This is created
594 during import, and specifies the CVS keyword expansion mode for files
595 having given suffixes, and can also tell Meta-CVS to ignore certain files
596 when importing or adding.
597
598 Release 0.5, 2002-02-10:
599
600 Much improved error handling. Filesystem rearranging code performs
601 sanity checks to prevent adds and moves from accidentally clobbering
602 local files. A rearranging gone bad can be rolled back. Effects
603 of a failed mcvs add can also be rolled back.
604
605 MAP-LOCAL is now sorted in the same way as MAP.
606
607 Release 0.4, 2002-02-04:
608
609 CVS is invoked using internal function resembling the xargs utility,
610 which ensures that multiple command lines are generated if necessary to
611 avoid surpassing the operating system limit on argument and environment
612 vector size. This is important when someone wants to diff or stat a
613 subdirectory, which requires Meta-CVS to pick out the individual files
614 at the CVS level.
615
616 The tag, log, status and annotate commands are now available.
617
618 The MAP file is sorted on F- file names now, not path names. This
619 improves merging, since files do not move within the file when
620 they are renamed.
621
622 Release 0.3, 2002-02-02:
623
624 Process termination done is properly in top level handler, by a nonlocal
625 exit. The program properly indicates failed termination when it exits
626 due to an error condition.
627
628 Corrections are made in the command line option processing. If z is an
629 option that takes an argument, and the argument is -zx, then x is
630 treated as the argument to the option. Long options arguments are
631 recognized properly, according to the --opt=arg convention. The option
632 processing is restructured. Most of the commands now take the
633 appropriate cvs command-specific options.
634
635 The update algorithm performs dupe checking over the map, which could
636 happen during a merge.
637
638 Some more bugfixing has been done to the move command. It was still not
639 handling right some cases of an unversioned file being clobbered. Also,
640 it wasn't renaming a directory containing just one file.
641
642 I did some performance investigation for larger file sets, and
643 ended up rewriting the code that computes filesystem restructuring
644 changes and map duplicates.
645
646 Release 0.2, 2002-01-30:
647
648 Changed official name from MCVS to Meta-CVS. The move command now
649 performs some filesystem tests so it does the right thing when a versioned
650 file is moved over a non-versioned file, or when a file is moved into
651 a directory not known to Meta-CVS. Factored out reading and writing of
652 map files into functions.
653
654 Release 0.1, 2002-01-28:
655
656 Support for mcvs diff -u added. The -R option works for mcvs add command.
657 Bug fixed in mcvs mv command; it wasn't working analogously to the Unix
658 mv command when copying a directory to an existing directory.
659
660 Release 0.0, 2002-01-27:
661
662 This is alpha software. It is not complete, and lacks documentation.
663 However, it is already usable in its present state and is being used for
664 version control by its author. If you can program in Common Lisp and would
665 like to help, take a look through the TODO file. Send me patches, ideas,
666 feature requests.

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