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Contents of /meta-cvs/F-B3689DBB46386B16F4B2331934B69223

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Revision - (show annotations)
Sat Jan 31 23:07:09 2004 UTC (10 years, 2 months ago) by kaz
Branch: mcvs-1-0-branch
Changes since +4 -0 lines
* remap.lisp (mcvs-remap): Provide a restart for continuing in the
case when an F- file is referenced in the MAP, but no working copy of
it exists.  By continuing through all these errors, the MAP is
cleaned of the nonexistent entries, which provies a way to clean
up after the naive ``mcvs convert'' algorithm.

* convert.lisp (*convert-help*): Add text recommending the use
of ``mcvs remap'' to clean up.
1 Release Notes for Meta-CVS
3 Release 1.0.12, 2004-0?-??:
5 Fixes various bugs in ``mcvs convert'', so that it is
6 actually useable now, albeit still far from a perfect CVS
7 migration tool.
9 The remap command can now purge the MAP of entries that refer to non-existent
10 F- files, which is useful for cleaning up after the convert algorithm,
11 if necessary.
13 Release 1.0.11, 2004-01-28:
15 Fixes breakage of list-branches command introduced in last release.
17 Fixes failures in grab command when pulling new baseline over
18 partial sandbox. Renamed symlinks, and execute permissions of files
19 were being accessed using abstract instead of real path.
21 Release 1.0.10, 2004-01-09:
23 Builds on CLISP 2.32. The lb command no longer produces bogus warning
24 when working copy is sticky to a version tag.
26 Release 1.0.9, 2003-11-24:
28 Failures to open terminal for reasons other than non-existence
29 of the object are handled (e.g. ``no such device'', etc).
31 The --nometa option now works properly in those commands that
32 operate on the whole project when no file arguments are given
33 (tag, update, commit). Also, these commands no longer implicitly
34 include the meta files when file arguments *are* given.
35 These files can be included explicitly with the --meta global option.
37 Release 1.0.8, 2003-06-03:
39 The Cygwin /dev/tty problem is partially addressed. The program
40 won't fail if /dev does not exist, but emits a warning message,
41 and disables interactive error handling. The workaround is to use
42 ``mkdir /dev''. This is a CLISP issue; its OPEN function expects the
43 full path to a file to actually exist, but on Cygwin, there are fake
44 /dev/* paths even though /dev does not exist. If a real /dev directory
45 does in fact exist, it does not interfere with these magic paths.
47 The ``mcvs fi'' command no longer performs expansion on F- names
48 that are preceded by a slash.
50 Release 1.0.7, 2003-04-23:
52 New commands sync-to-cvs and sync-from-cvs expose the hard link
53 synchronization algorithm.
55 Revamped error recovery logic. To continue in an error situation now
56 consistently means ``take the bold action that may erase data''
57 or ``proceed in the most obvious way to finish the specified job''.
58 It never means ``roll back the operation and bail'', which was
59 confusing.
61 Termination is no longer unsafe; the `T' menu command, and the
62 equivalent --error-terminate global option perform all necessary
63 restoration and cleanup.
65 Errors that have more information to print, like a list of files or
66 whatever, now indicate it in a standard way which translates to the
67 `I' menu command.
69 Chatter output goes to standard error rather than standard output,
70 as do all error messages.
72 The interactive error menu now talks to the user using the controlling
73 tty, meaning that it will work even if the input or output of the
74 mcvs command are redirected. If no controlling tty is available,
75 then interactive error handling is disabled; the default behavior
76 is then like --error-terminate but can of course be overridden by
77 --error-continue.
79 Release 1.0.6, 2003-04-14:
81 The create command detects the existence of text editor backup files (or
82 other junk) in the MCVS directory after the editor is invoked on the
83 TYPES file. The user is prompted regarding their removal. If these files are
84 not removed, cvs import will bring them into the repository.
86 When Meta-CVS has to split a large CVS command into two or more
87 invocations with shorter argument lists, it now does not stop when one of
88 these invocations is unsuccessful; it does all of them, and combines
89 their termination indications by a logical AND. There was a bug in this
90 logic also which caused, upon termination failure, a cvs command to be
91 repeated for the same list of files.
93 Synchronization logic has been revamped. Unnecessary synchronizations
94 have been removed, which will make some commands run faster.
95 Synchronizations now have specific directions; for instance before
96 a CVS commit or update, changes are pushed from the directory tree to the MCVS
97 directory only, and after the CVS operation, in the reverse direction only.
99 Meta-CVS will no longer re-create missing F- files by linking from the
100 directory tree. Doing this causes two problems. One is that if a user
101 manually removes a F- file and do ``mcvs up'', she wants CVS to fetch a clean
102 copy and push it into the tree. She does not want the file to be restored
103 from the tree prior to the CVS update. Secondly, sometimes CVS itself
104 removes files. If we re-create the files, CVS will consider them to
105 be ``in the way''.
107 Failures to read from the MAP or MAP-LOCAL files are treated as interactive,
108 continuable errors. By continuing, the user agrees that the behavior will
109 be as if an empty map were read.
111 The grab command uses less memory for performing move analysis.
113 Release 1.0.5, 2003-02-25:
115 Bugfix: some one-argument command line options of CVS must be
116 specifies as a single parameter, with no separation between the
117 option letter and the argument characters. For example:
119 cvs log -r rev-1::rev-2 # invalid
120 cvs log -rrev1::rev2 # correct
122 Meta-CVS accepts either syntax, but it was generating the first form
123 when calling CVS. Now, *all* one-letter options that have an argument
124 are formatted in the second manner.
126 Bugfix: one more waitpid() issue was fixed; on fast machines, under
127 Linux, it was observed that from time to time Meta-CVS would get
128 a -1/ECHILD when waiting for the CVS process.
130 Release 1.0.4, 2003-02-20:
132 Fix remaining occurences of the CVS ``No child processes'' abort
133 problem, affecting the list-branches command, merge command
134 and the -r option of the filt command.
136 Release 1.0.3, 2003-02-12:
138 ! THIS RELEASE IS WITHDRAWN. It was accidentally created from the
139 ! experimental main trunk of the Meta-CVS codebase, rather than
140 ! the 1.0 branch. But 1.0.4 does contain all of the changes
141 ! described here.
143 Fix for the CVS ``No child processes'' abort problem. It turns out
144 that CLISP sets the signal handling action for the SIGCHLD signal
145 to SIG_IGN, which is inherited by child processes across the
146 fork() and execvp() calls used in our mcvs_spawn() function.
147 We correct the problem by resetting the signal handler to SIG_DFL
148 just before executing the new process image.
150 New feature, --up option. The argument is a nonnegative integer value
151 (default is zero) which specifies how many sandbox nesting levels to
152 escape out of when locating the sandbox root. This helps work with
153 nested Meta-CVS sandboxes.
155 Release 1.0.2, 2003-02-10:
157 Bugfix in waitpid logic in the C library for running external processes;
158 we were not dealing with an interrupted waitpid.
160 Behavior of mcvs tag is changed: when there are no filename arguments,
161 the whole tree is tagged including the metafiles. In other words, it
162 now works like the commit command.
164 Release 1.0.1, 2003-01-30:
166 Hard link sync optimization: update of a subset of files, commit, and
167 other operations like log and diff don't need to synchronize all
168 hard links, just the ones operated on.
170 The merge and remerge commands support -k option for overriding
171 CVS keyword expansion mode.
173 Fixes to getcwd error handling.
175 Improvement in install.sh script's logic for locating CLISP installation
176 directory.
178 Release 1.0, 2003-01-01:
180 NOTE: It's not possible to upgrade to this release via mcvs-upgrade,
181 because it adds some new C functions to the Lisp executable.
183 Security fix: read-time evaluation was not suppressed when reading
184 structured data, like MCVS/MAP and MCVS/TYPES. This means that it
185 was possible for Alice to check in something that would execute
186 arbitrary code on Bob's computer.
188 Optimization: use fork and exec to launch CVS rather than CLISP's
189 run-program function, which indirects through the shell interpreter.
190 (On Cygwin, the spawnvp function is used).
192 Performance fix: stat() was being called superfluously by the
193 hard synchronization code, twice for each file.
195 Build fix: install.sh works when CLISP executable is called ``lisp.exe'',
196 which is the case under Cygwin with newer CLISP releases.
198 Release 0.99, 2002-11-17:
200 New link command for creating symbolic links.
202 Global option -n (dry run---don't modify filesystem) is processed
203 internally now, not just passed to CVS.
205 Failure to invoke text editor is handled.
207 The -r option of filt is fixed; it has been broken since the change to the
208 new MAP format, because it was reading the raw map representation, not
209 passing it through the right conversion steps that are needed now.
211 Bugfix to purge and remap commands: they were fooled by CVS-generated
212 files in the MCVS/CVS directory. Specifically, files having F- names, and a
213 the suffix ,t.
215 Bugfix to add logic in directory restructuring: there was the possibility
216 of mistakingly taking a clobbered local file to be a new local version of
217 the added file, instead of replacing it. This could happen if the local
218 file had a future timestamp relative to the one coming from the repository.
220 The prop command does not synchronize or write out map if no options are
221 specified.
223 Help text added for move and branch commands. Help text for grab rewritten.
225 The CVSEDITOR and VISUAL environment variables are now checked, not
226 only EDITOR.
228 Release 0.98, 2002-10-13:
230 The prop command was mistakenly reading from MAP-LOCAL and writing to MAP,
231 which could cause information loss if the two differ. It now reads from MAP
232 and writes to MAP. (The property changes propagate to MAP-LOCAL by the
233 update operation invoked by prop, as before).
235 Invocation of external programs included in debug trace.
237 The filt command does not filter F- names if they are immediately preceded by
238 the MCVS/ prefix; such occurences are clearly concrete, sandbox-relative
239 references to the actual F- links, rather than abstract references.
241 The update command now supports the -C option, to fetch the repository
242 copy, throwing away local changes. It also now honors the --metaonly
243 and --nometa options.
245 The export command has been added, for checking out documents without creating
246 a working copy (no MCVS directory in the root of the checkout).
248 The watch command has been added. Note that its syntax differs from that
249 of CVS.
251 The watchers, editors, edit, and unedit commands have been added.
253 A script called mcvs-upgrade is now included, and installs alongside the mcvs
254 script. This allows the Meta-CVS Lisp image to recompile and patch itself,
255 giving users of binary distributions an easy way to upgrade from source
256 code.
258 Release 0.97, 2002-10-06:
260 Meta-CVS now builds and runs on Microsoft Windows, under Cygwin
261 (www.cygwin.com). It still relies on hard links, which requires
262 Windows 2000 or XP, and the NTFS filesystem. It probably won't
263 work over FAT.
265 New --debug option for verbose output.
267 Cleaned up of error messages. Error messages don't specify prefixes like
268 ``mcvs-add:'' or ``mcvs-grab:'' any more. Rather, the error handler adds the
269 ``mcvs:'' prefix when printing the messages in a situation when the error is
270 not continuable.
272 Fixed bug introduced in release 0.13: mcvs add -R was adding only
273 directories, effectively ignoring arguments that are regular files.
274 The error-continuation behavior of mcvs add has been revised.
276 Trying to rename an object onto itself, or to move the sandbox root
277 directory are no longer silent no-ops, but produce an error.
279 The remap command now preserves property lists, and picks up changes
280 in executable permission.
282 The grab command now notices when a file changes from having execute
283 permission to not having execute permission.
285 Operations on the path . now work in a partial sandbox.
287 Release 0.96, 2002-09-21:
289 The restore command was left broken during the change to the new
290 filemap format. It is now fixed.
292 The grab command now handles execute permission bits properly.
294 Some more commands have detailed help.
296 There is now a global option -i which specifies a script to be
297 executed. This allows Meta-CVS to be scripted using Lisp. For
298 instance suppose you have the following script and call it
299 list-matching:
301 #!/usr/local/bin/mcvs -i
302 (in-sandbox-root-dir
303 (let ((mapping (mapping-read *mcvs-map*))
304 (test-func (eval (read-from-string (pop *args*)))))
305 (dolist (entry mapping)
306 (with-slots (path raw-plist) entry
307 (when (funcall test-func raw-plist)
308 (format t "~a~%" path))))))
310 Then to list the names of files whose "importance" property is
311 a value greater than two, run:
313 ./list-matching '(lambda (plist)
314 (let ((imp (getf plist :importance)))
315 (and imp (> imp 2))))'
317 WARNING: Scripting accesses the guts of Meta-CVS directly, so scripts may
318 break as Meta-CVS is maintained. There is currently no published set of
319 stable interfaces.
321 Release 0.95, 2002-09-16:
323 The install.sh script no longer uses a borrowed copy of the clisp-link script
324 or the linkkit directory; these have been removed. These materials
325 are available at every CLISP installation; install.sh now finds them
326 and uses them. Users of non-x86 machines ran into problems because of this
327 because linkkit/clisp.h contains architecture-dependent information.
329 A bug in mcvs filt was fixed; it wasn't handling F- names that aren't found
330 in the map.
332 A more detailed help system now exists, though it's not complete. The ``mcvs
333 help'' command acts just like ``mcvs --help'' without any arguments. If given
334 an additional parameter which specifies a Meta-CVS command, it produces more
335 detailed documentation for that comand. Help exists already for a few
336 commands.
338 The release number is being warped to 0.95, which means that Meta-CVS is now
339 in beta. It is only five updates away from a 1.0 release.
341 Release 0.24, 2002-09-08:
343 The mapping entries for both symlinks and files have extensible property
344 lists now. These are stored in the optional fourth and fifth list elements,
345 respectively of the :FILE and :SYMLINK map entries.
347 Versioning of the execute permission of files is supported, represented as
348 the :EXEC property of a :FILE mapping entry.
350 Some lame syntax is provided for manipulating properties:
352 mcvs prop --set foo --clear bar --remove baz main.c list.c
354 will set the property FOO to true, set the property BAR to false,
355 and remove the property BAZ, in the files main.c and list.c.
356 The execute permission is represented by the property EXEC.
358 Release 0.23, 2002-09-02:
360 Bugfix: the grab command notices edited symlinks and incorporates the
361 changes into the mapping.
363 The grab command now figures out moved symlinks. Moved symlinks are those
364 whose pathname has changed, but which continue to point to the same object
365 (which may also have been moved).
367 Release 0.22, 2002-08-31:
369 Symbolic links are now versioned objects. The format of the MAP file
370 changes to accomodate this; the new Meta-CVS will read old MAP
371 files; when it writes it will write the new format. Old Meta-CVS won't
372 read the new format.
374 When a new module is created from an existing file tree, symbolic
375 links will be recognized and added. The add command will also add
376 symbolic links. Symbolic links can be renamed and moved; this does
377 nothing with their contents. They can point outside of the sandbox
378 using relative or absolute paths.
380 TODO:
382 There doesn't exist yet a special command to create symbolic links, nor to
383 retarget them; retargetting a link can be done manually by editing MCVS/MAP
384 and updating. Retargetting a link using the ln -s command, won't
385 backpropagate to the MAP file; an update will clobber the link.
387 The grab command does not yet compute symbolic link moves; a moved symbolic
388 link is treated as a remove and add. This will be easy to fix.
390 The remap command ignores symlinks.
392 Release 0.21, 2002-08-04:
394 Syntax of grab command changed. The branch is no longer specified as an
395 argument, but using the -r command option. If no revision is specified with
396 -r, then a -A must be specified to make the grab go to the main trunk. This
397 is a safety feature, since grabbing foreign snapshots to the trunk is almost
398 always wrong, though it could be useful during backup recovery, or for fixing
399 mistakes.
401 The way operating system functions are targetted has changed. Instead of
402 relying on the ``linuxlibc6'' module provided by CLISP, Meta-CVS now
403 has its own module for calling foreign functions. This module is portable;
404 it does not depend on the layout of glibc data structures. So Meta-CVS
405 is in theory now portable to other Unixes (provided they have /dev/urandom).
407 Release 0.20, 2002-07-27:
409 The commit command does a true global commit when given no file or directory
410 parameters, and not given the --metaonly option. This means commiting all
411 changes in the MCVS directory, even if they are in F-files that are not
412 currently mapped.
414 Release 0.19, 2002-07-16:
416 When moving multiple files or directories to a subdirectory, a
417 restart is now provided to skip over bad ones and continue.
419 Grab no longer scans files if there are only added files, or only removed
420 files. There are no moves to deduce in that case.
422 Restore properly creates lost+found at the root of a partial sandbox,
423 rather than at the abstract root of the module.
425 Some other algorithmic improvements made.
427 The first few sections of a user guide have been written.
429 Release 0.18, 2002-07-07:
431 Cool new feature: checkout takes an extra argument, which specifies a
432 subdirectory of the project. Specifying a subdirectory results in a ``partial
433 sandbox'', whose root directory is the specified subdirectory of the larger
434 project. The rest of the project is ``invisible'' to that sandbox. A
435 subdirectory argument can also be given to mcvs grab, which will cause it to
436 integrate the new source tree against a subtree of the Meta-CVS project
437 rather than the entire project. The subtree doesn't have to exist; in
438 that case you get an empty sandbox. Adding files to this sandbox will cause
439 the tree to exist in the project.
441 Bugfix: mcvs grab was not computing moves properly over small file sets,
442 wrongly treating them as removes and adds.
444 Release 0.17, 2002-07-02:
446 The create command no longer takes a vendor branch. Instead the symbol
447 ``Created-by-Meta-CVS'' is used as the vendor tag to satisfy CVS.
449 The grab command no longer does useless synchronization on files that
450 are about to be deleted.
452 New purge command; does ``cvs rm'' on deleted files, that is to say, F- files
453 that have no mapping.
455 New restore command; re-enters deleted files into the mapping, under
456 the ``lost+found'' directory, using their F- names as sandbox names.
458 Bugfix: when a checkout bails because it is requested over top of an existing
459 working copy, it must not delete that working copy's MCVS sub directory.
461 Release 0.16, 2002-06-29:
463 Added new heuristics to grab command. Paths are analyzed to determine
464 move distance. Greater distances reduce the confidence in a move.
465 These rules help sort out grabs in a project where similar or
466 duplicate files are subject to parallel moves, the ambiguity being
467 resolved by favoring shorter moves. Word comparisons are case-insensitive
468 now. Common words (those that appear in many files) are ignored when
469 comparing files.
471 New options, --meta and --metaonly. This area of Meta-CVS is cleaned
472 up a little bit. Most reporting commands like log or diff no longer
473 operate on meta files by default; they must be explicitly told to do
474 so with --meta or --metaonly. Only the commit command implicitly includes
475 metafiles by default, and so if this is not wanted, --nometa must be
476 selected. The update command remains special; if it is given file
477 arguments, it does not include meta files. If given no arguments, it
478 does a global CVS up across the entire project.
480 Release 0.15, 2002-06-25:
482 Optimized a string splitting routine which is used heavily for processing
483 paths; the result is a noticeable performance improvement in some commands
484 that process large numbers of files.
486 Renamed ``import'' command to ``create''.
488 Bugfix: checkout and create showed errors when removing directory, due to
489 broken :postorder support in directory walking function.
491 Bugfix: on failure, checkout was failing to delete the MCVS directory when
492 the checkout was directed to an existing directory.
494 New feature: ``mcvs grab'' command imports third-party snapshots to a
495 branch. This is invoked in the root directory of the source tree to import.
496 It determines what files have been added and removed in the snapshot, and
497 tries to compute which removes and adds are actually moves. This is done by
498 analyzing the actual contents of the files according to a crude algorithm to
499 do fuzzy comparisons, so that even files which were modified as well as moved
500 are discovered.
502 Release 0.14, 2002-06-21:
504 Bugfix: mcvs add was broken for files that have no suffix, causing
505 the underlying cvs add to fail. This was broken in 0.7 when type
506 handling was added.
508 Release 0.13, 2002-06-06:
510 Sandbox synchronization now handles the case of two files having
511 the same timestamp. An error is signaled, with interactive resolution
512 to synchronize either way, or do nothing.
514 If a file must be deleted on update, and this cannot be done, it
515 is now a continuable error.
517 Bugfix: pass -I ! to cvs import so that it won't ignore some F- files
518 whose suffix is one of the ones cvs ignores by default.
520 New command: mcvs remap. The user can move or delete files directly without
521 going through Meta-CVS. When mcvs remap is invoked, it will hunt down the
522 moves and deletions, and reconstruct the mapping accordingly; that is,
523 it remaps the new structure. This command uses inode numbers to identify
524 files; if a file is copied and then the original is deleted, that won't
525 be recognized as a move.
527 Release 0.12, 2002-04-18:
529 Bugfix: remove was broken in 0.10, fixed now.
531 Bugfix: status, diff, etc. work in empty project rather than complaining
532 ``. not known to Meta-CVS''.
534 The checkout operation now can now populate an existing directory, including
535 the current working directory (mcvs co -d . modulename). Of course, the
536 target directory cannot be an existing Meta-CVS sandbox.
537 This is a useful feature, which allows sandboxes to blend with an
538 existing directory structure.
540 Checkout now uses the same function for generating the sandbox
541 structure as does update. This is now necessary, because local files
542 can be clobbered by the checkout.
544 Release 0.11, 2002-04-12:
546 Bugfix: when branch invokes rtag, it now takes the CVSROOT information
547 from CVS/Root and passes it via -d. This is necessary because rtag does not
548 look at a local CVS subdirectory for this information, only the
549 -d option or the environment variable.
551 Command for listing branches added (list-branches or lb). Also shows
552 what sticky tag the sandbox is updated to.
554 Command for switching branches added (switch or sw).
556 Merge detects that working copy is on non-branch tag and bails.
558 Absolute paths can now be specified as file arguments. These are
559 based from the root directory of the sandbox, not the actual filesystem root
560 directory.
562 Release 0.10, 2002-04-03:
564 Automatic merging implemented. Branch is created using branch command,
565 and merging from another branch is done using simple merge command.
566 Meta-CVS maintains the tags to keep track of what has been merged
567 from what branch to what branch.
569 Bugfix: checkout -d foo bar was complaining about directory bar already
570 existing, even though it should only care about foo.
572 The remove command now requires explicit -R option to recursively remove
573 a directory. It has more detailed error reporting.
575 The move command has better error reporting.
577 Release 0.9, 2002-03-14:
579 Bugfix: the .cvsignore file is now subject to tagging, status, etc,
580 (unless --nometa is specified, of course).
582 The mcvs filt command takes -r <revision> or -D <date> parameters.
583 This means to retrieve the MAP file as of the specified revision or
584 date and use that mapping to perform the filtering translation,
585 rather than using MAP-LOCAL.
587 The mcvs update command takes filename arguments now and also
588 supports the -p option.
590 Release 0.8, 2002-03-13:
592 Bug fixed in mcvs add; it was not ignoring files that are already
593 listed as :ignore in MCVS/TYPES.
595 Bug fixed in mcvs move: a target with a trailing slash is now treated
596 as a directory (if it does not already exist and is a non-directory).
598 The -d option of mcvs checkout can now be used to override the checkout
599 directory, which is normally the same as the module name.
601 The global options --version, --help, -q, -Q and -e are now supported.
603 New global options --error-continue and --error-terminate to disable
604 interactive error handling in two different ways.
606 Log level of many messages has changed; many messages have been
607 relegated to debug level.
609 The import command now creates a .cvsignore file containing the name
612 Release 0.7, 2002-03-09:
614 The import command collects a list of the file suffixes and brings up
615 a text editor to allow the user to edit their CVS keyword expansion
616 behavior. This information is kept in a new metafile called TYPES. The
617 add command also updates TYPES; it identifies any suffixes which are new,
618 and brings up an editor. The F- files now carry suffixes, which
619 simplifies interfacing with CVS, and also allows cvswrappers to work.
621 Recursive add works (mcvs add -R ...).
623 New command line option --nometa allows metafiles to be excluded from
624 diff, tag, and other commands; without the option they are inserted
625 into the list of files to be processed.
627 The commit option now takes an optional list of files or directories,
628 just like tag, diff, and others.
630 Release 0.6, 2002-02-16:
632 The add operation was horribly broken in 0.5, it is fixed.
634 User can interactively select whether to clobber local files or leave
635 everything alone. Effects on the mapping file of a mcvs move are undone,
636 if the restructuring is rolled back, or raises a condition that leads
637 to termination.
639 Meta-CVS now keeps a new meta-file called MCVS/TYPES. This is created
640 during import, and specifies the CVS keyword expansion mode for files
641 having given suffixes, and can also tell Meta-CVS to ignore certain files
642 when importing or adding.
644 Release 0.5, 2002-02-10:
646 Much improved error handling. Filesystem rearranging code performs
647 sanity checks to prevent adds and moves from accidentally clobbering
648 local files. A rearranging gone bad can be rolled back. Effects
649 of a failed mcvs add can also be rolled back.
651 MAP-LOCAL is now sorted in the same way as MAP.
653 Release 0.4, 2002-02-04:
655 CVS is invoked using internal function resembling the xargs utility,
656 which ensures that multiple command lines are generated if necessary to
657 avoid surpassing the operating system limit on argument and environment
658 vector size. This is important when someone wants to diff or stat a
659 subdirectory, which requires Meta-CVS to pick out the individual files
660 at the CVS level.
662 The tag, log, status and annotate commands are now available.
664 The MAP file is sorted on F- file names now, not path names. This
665 improves merging, since files do not move within the file when
666 they are renamed.
668 Release 0.3, 2002-02-02:
670 Process termination done is properly in top level handler, by a nonlocal
671 exit. The program properly indicates failed termination when it exits
672 due to an error condition.
674 Corrections are made in the command line option processing. If z is an
675 option that takes an argument, and the argument is -zx, then x is
676 treated as the argument to the option. Long options arguments are
677 recognized properly, according to the --opt=arg convention. The option
678 processing is restructured. Most of the commands now take the
679 appropriate cvs command-specific options.
681 The update algorithm performs dupe checking over the map, which could
682 happen during a merge.
684 Some more bugfixing has been done to the move command. It was still not
685 handling right some cases of an unversioned file being clobbered. Also,
686 it wasn't renaming a directory containing just one file.
688 I did some performance investigation for larger file sets, and
689 ended up rewriting the code that computes filesystem restructuring
690 changes and map duplicates.
692 Release 0.2, 2002-01-30:
694 Changed official name from MCVS to Meta-CVS. The move command now
695 performs some filesystem tests so it does the right thing when a versioned
696 file is moved over a non-versioned file, or when a file is moved into
697 a directory not known to Meta-CVS. Factored out reading and writing of
698 map files into functions.
700 Release 0.1, 2002-01-28:
702 Support for mcvs diff -u added. The -R option works for mcvs add command.
703 Bug fixed in mcvs mv command; it wasn't working analogously to the Unix
704 mv command when copying a directory to an existing directory.
706 Release 0.0, 2002-01-27:
708 This is alpha software. It is not complete, and lacks documentation.
709 However, it is already usable in its present state and is being used for
710 version control by its author. If you can program in Common Lisp and would
711 like to help, take a look through the TODO file. Send me patches, ideas,
712 feature requests.

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