/[meta-cvs]/meta-cvs/F-B3689DBB46386B16F4B2331934B69223
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Revision 1.127.2.38 - (show annotations)
Thu Feb 13 06:17:07 2003 UTC (11 years, 2 months ago) by kaz
Branch: mcvs-1-0-branch
Changes since 1.127.2.37: +1 -1 lines
Release 1.0.3.
1 Release Notes for Meta-CVS
2
3 Release 1.0.3, 2002-02-12:
4
5 Fix for the CVS ``No child processes'' abort problem. It turns out
6 that CLISP sets the signal handling action for the SIGCHLD signal
7 to SIG_IGN, which is inherited by child processes across the
8 fork() and execvp() calls used in our mcvs_spawn() function.
9 We correct the problem by resetting the signal handler to SIG_DFL
10 just before executing the new process image.
11
12 Release 1.0.2, 2002-02-10:
13
14 Bugfix in waitpid logic in the C library for running external processes;
15 we were not dealing with an interrupted waitpid.
16
17 Behavior of mcvs tag is changed: when there are no filename arguments,
18 the whole tree is tagged including the metafiles. In other words, it
19 now works like the commit command.
20
21 Release 1.0.1, 2003-01-30:
22
23 Hard link sync optimization: update of a subset of files, commit, and
24 other operations like log and diff don't need to synchronize all
25 hard links, just the ones operated on.
26
27 The merge and remerge commands support -k option for overriding
28 CVS keyword expansion mode.
29
30 Fixes to getcwd error handling.
31
32 Improvement in install.sh script's logic for locating CLISP installation
33 directory.
34
35 Release 1.0, 2003-01-01:
36
37 NOTE: It's not possible to upgrade to this release via mcvs-upgrade,
38 because it adds some new C functions to the Lisp executable.
39
40 Security fix: read-time evaluation was not suppressed when reading
41 structured data, like MCVS/MAP and MCVS/TYPES. This means that it
42 was possible for Alice to check in something that would execute
43 arbitrary code on Bob's computer.
44
45 Optimization: use fork and exec to launch CVS rather than CLISP's
46 run-program function, which indirects through the shell interpreter.
47 (On Cygwin, the spawnvp function is used).
48
49 Performance fix: stat() was being called superfluously by the
50 hard synchronization code, twice for each file.
51
52 Build fix: install.sh works when CLISP executable is called ``lisp.exe'',
53 which is the case under Cygwin with newer CLISP releases.
54
55 Release 0.99, 2002-11-17:
56
57 New link command for creating symbolic links.
58
59 Global option -n (dry run---don't modify filesystem) is processed
60 internally now, not just passed to CVS.
61
62 Failure to invoke text editor is handled.
63
64 The -r option of filt is fixed; it has been broken since the change to the
65 new MAP format, because it was reading the raw map representation, not
66 passing it through the right conversion steps that are needed now.
67
68 Bugfix to purge and remap commands: they were fooled by CVS-generated
69 files in the MCVS/CVS directory. Specifically, files having F- names, and a
70 the suffix ,t.
71
72 Bugfix to add logic in directory restructuring: there was the possibility
73 of mistakingly taking a clobbered local file to be a new local version of
74 the added file, instead of replacing it. This could happen if the local
75 file had a future timestamp relative to the one coming from the repository.
76
77 The prop command does not synchronize or write out map if no options are
78 specified.
79
80 Help text added for move and branch commands. Help text for grab rewritten.
81
82 The CVSEDITOR and VISUAL environment variables are now checked, not
83 only EDITOR.
84
85 Release 0.98, 2002-10-13:
86
87 The prop command was mistakenly reading from MAP-LOCAL and writing to MAP,
88 which could cause information loss if the two differ. It now reads from MAP
89 and writes to MAP. (The property changes propagate to MAP-LOCAL by the
90 update operation invoked by prop, as before).
91
92 Invocation of external programs included in debug trace.
93
94 The filt command does not filter F- names if they are immediately preceded by
95 the MCVS/ prefix; such occurences are clearly concrete, sandbox-relative
96 references to the actual F- links, rather than abstract references.
97
98 The update command now supports the -C option, to fetch the repository
99 copy, throwing away local changes. It also now honors the --metaonly
100 and --nometa options.
101
102 The export command has been added, for checking out documents without creating
103 a working copy (no MCVS directory in the root of the checkout).
104
105 The watch command has been added. Note that its syntax differs from that
106 of CVS.
107
108 The watchers, editors, edit, and unedit commands have been added.
109
110 A script called mcvs-upgrade is now included, and installs alongside the mcvs
111 script. This allows the Meta-CVS Lisp image to recompile and patch itself,
112 giving users of binary distributions an easy way to upgrade from source
113 code.
114
115 Release 0.97, 2002-10-06:
116
117 Meta-CVS now builds and runs on Microsoft Windows, under Cygwin
118 (www.cygwin.com). It still relies on hard links, which requires
119 Windows 2000 or XP, and the NTFS filesystem. It probably won't
120 work over FAT.
121
122 New --debug option for verbose output.
123
124 Cleaned up of error messages. Error messages don't specify prefixes like
125 ``mcvs-add:'' or ``mcvs-grab:'' any more. Rather, the error handler adds the
126 ``mcvs:'' prefix when printing the messages in a situation when the error is
127 not continuable.
128
129 Fixed bug introduced in release 0.13: mcvs add -R was adding only
130 directories, effectively ignoring arguments that are regular files.
131 The error-continuation behavior of mcvs add has been revised.
132
133 Trying to rename an object onto itself, or to move the sandbox root
134 directory are no longer silent no-ops, but produce an error.
135
136 The remap command now preserves property lists, and picks up changes
137 in executable permission.
138
139 The grab command now notices when a file changes from having execute
140 permission to not having execute permission.
141
142 Operations on the path . now work in a partial sandbox.
143
144 Release 0.96, 2002-09-21:
145
146 The restore command was left broken during the change to the new
147 filemap format. It is now fixed.
148
149 The grab command now handles execute permission bits properly.
150
151 Some more commands have detailed help.
152
153 There is now a global option -i which specifies a script to be
154 executed. This allows Meta-CVS to be scripted using Lisp. For
155 instance suppose you have the following script and call it
156 list-matching:
157
158 #!/usr/local/bin/mcvs -i
159 (in-sandbox-root-dir
160 (let ((mapping (mapping-read *mcvs-map*))
161 (test-func (eval (read-from-string (pop *args*)))))
162 (dolist (entry mapping)
163 (with-slots (path raw-plist) entry
164 (when (funcall test-func raw-plist)
165 (format t "~a~%" path))))))
166
167 Then to list the names of files whose "importance" property is
168 a value greater than two, run:
169
170 ./list-matching '(lambda (plist)
171 (let ((imp (getf plist :importance)))
172 (and imp (> imp 2))))'
173
174 WARNING: Scripting accesses the guts of Meta-CVS directly, so scripts may
175 break as Meta-CVS is maintained. There is currently no published set of
176 stable interfaces.
177
178 Release 0.95, 2002-09-16:
179
180 The install.sh script no longer uses a borrowed copy of the clisp-link script
181 or the linkkit directory; these have been removed. These materials
182 are available at every CLISP installation; install.sh now finds them
183 and uses them. Users of non-x86 machines ran into problems because of this
184 because linkkit/clisp.h contains architecture-dependent information.
185
186 A bug in mcvs filt was fixed; it wasn't handling F- names that aren't found
187 in the map.
188
189 A more detailed help system now exists, though it's not complete. The ``mcvs
190 help'' command acts just like ``mcvs --help'' without any arguments. If given
191 an additional parameter which specifies a Meta-CVS command, it produces more
192 detailed documentation for that comand. Help exists already for a few
193 commands.
194
195 The release number is being warped to 0.95, which means that Meta-CVS is now
196 in beta. It is only five updates away from a 1.0 release.
197
198 Release 0.24, 2002-09-08:
199
200 The mapping entries for both symlinks and files have extensible property
201 lists now. These are stored in the optional fourth and fifth list elements,
202 respectively of the :FILE and :SYMLINK map entries.
203
204 Versioning of the execute permission of files is supported, represented as
205 the :EXEC property of a :FILE mapping entry.
206
207 Some lame syntax is provided for manipulating properties:
208
209 mcvs prop --set foo --clear bar --remove baz main.c list.c
210
211 will set the property FOO to true, set the property BAR to false,
212 and remove the property BAZ, in the files main.c and list.c.
213 The execute permission is represented by the property EXEC.
214
215 Release 0.23, 2002-09-02:
216
217 Bugfix: the grab command notices edited symlinks and incorporates the
218 changes into the mapping.
219
220 The grab command now figures out moved symlinks. Moved symlinks are those
221 whose pathname has changed, but which continue to point to the same object
222 (which may also have been moved).
223
224 Release 0.22, 2002-08-31:
225
226 Symbolic links are now versioned objects. The format of the MAP file
227 changes to accomodate this; the new Meta-CVS will read old MAP
228 files; when it writes it will write the new format. Old Meta-CVS won't
229 read the new format.
230
231 When a new module is created from an existing file tree, symbolic
232 links will be recognized and added. The add command will also add
233 symbolic links. Symbolic links can be renamed and moved; this does
234 nothing with their contents. They can point outside of the sandbox
235 using relative or absolute paths.
236
237 TODO:
238
239 There doesn't exist yet a special command to create symbolic links, nor to
240 retarget them; retargetting a link can be done manually by editing MCVS/MAP
241 and updating. Retargetting a link using the ln -s command, won't
242 backpropagate to the MAP file; an update will clobber the link.
243
244 The grab command does not yet compute symbolic link moves; a moved symbolic
245 link is treated as a remove and add. This will be easy to fix.
246
247 The remap command ignores symlinks.
248
249 Release 0.21, 2002-08-04:
250
251 Syntax of grab command changed. The branch is no longer specified as an
252 argument, but using the -r command option. If no revision is specified with
253 -r, then a -A must be specified to make the grab go to the main trunk. This
254 is a safety feature, since grabbing foreign snapshots to the trunk is almost
255 always wrong, though it could be useful during backup recovery, or for fixing
256 mistakes.
257
258 The way operating system functions are targetted has changed. Instead of
259 relying on the ``linuxlibc6'' module provided by CLISP, Meta-CVS now
260 has its own module for calling foreign functions. This module is portable;
261 it does not depend on the layout of glibc data structures. So Meta-CVS
262 is in theory now portable to other Unixes (provided they have /dev/urandom).
263
264 Release 0.20, 2002-07-27:
265
266 The commit command does a true global commit when given no file or directory
267 parameters, and not given the --metaonly option. This means commiting all
268 changes in the MCVS directory, even if they are in F-files that are not
269 currently mapped.
270
271 Release 0.19, 2002-07-16:
272
273 When moving multiple files or directories to a subdirectory, a
274 restart is now provided to skip over bad ones and continue.
275
276 Grab no longer scans files if there are only added files, or only removed
277 files. There are no moves to deduce in that case.
278
279 Restore properly creates lost+found at the root of a partial sandbox,
280 rather than at the abstract root of the module.
281
282 Some other algorithmic improvements made.
283
284 The first few sections of a user guide have been written.
285
286 Release 0.18, 2002-07-07:
287
288 Cool new feature: checkout takes an extra argument, which specifies a
289 subdirectory of the project. Specifying a subdirectory results in a ``partial
290 sandbox'', whose root directory is the specified subdirectory of the larger
291 project. The rest of the project is ``invisible'' to that sandbox. A
292 subdirectory argument can also be given to mcvs grab, which will cause it to
293 integrate the new source tree against a subtree of the Meta-CVS project
294 rather than the entire project. The subtree doesn't have to exist; in
295 that case you get an empty sandbox. Adding files to this sandbox will cause
296 the tree to exist in the project.
297
298 Bugfix: mcvs grab was not computing moves properly over small file sets,
299 wrongly treating them as removes and adds.
300
301 Release 0.17, 2002-07-02:
302
303 The create command no longer takes a vendor branch. Instead the symbol
304 ``Created-by-Meta-CVS'' is used as the vendor tag to satisfy CVS.
305
306 The grab command no longer does useless synchronization on files that
307 are about to be deleted.
308
309 New purge command; does ``cvs rm'' on deleted files, that is to say, F- files
310 that have no mapping.
311
312 New restore command; re-enters deleted files into the mapping, under
313 the ``lost+found'' directory, using their F- names as sandbox names.
314
315 Bugfix: when a checkout bails because it is requested over top of an existing
316 working copy, it must not delete that working copy's MCVS sub directory.
317
318 Release 0.16, 2002-06-29:
319
320 Added new heuristics to grab command. Paths are analyzed to determine
321 move distance. Greater distances reduce the confidence in a move.
322 These rules help sort out grabs in a project where similar or
323 duplicate files are subject to parallel moves, the ambiguity being
324 resolved by favoring shorter moves. Word comparisons are case-insensitive
325 now. Common words (those that appear in many files) are ignored when
326 comparing files.
327
328 New options, --meta and --metaonly. This area of Meta-CVS is cleaned
329 up a little bit. Most reporting commands like log or diff no longer
330 operate on meta files by default; they must be explicitly told to do
331 so with --meta or --metaonly. Only the commit command implicitly includes
332 metafiles by default, and so if this is not wanted, --nometa must be
333 selected. The update command remains special; if it is given file
334 arguments, it does not include meta files. If given no arguments, it
335 does a global CVS up across the entire project.
336
337 Release 0.15, 2002-06-25:
338
339 Optimized a string splitting routine which is used heavily for processing
340 paths; the result is a noticeable performance improvement in some commands
341 that process large numbers of files.
342
343 Renamed ``import'' command to ``create''.
344
345 Bugfix: checkout and create showed errors when removing directory, due to
346 broken :postorder support in directory walking function.
347
348 Bugfix: on failure, checkout was failing to delete the MCVS directory when
349 the checkout was directed to an existing directory.
350
351 New feature: ``mcvs grab'' command imports third-party snapshots to a
352 branch. This is invoked in the root directory of the source tree to import.
353 It determines what files have been added and removed in the snapshot, and
354 tries to compute which removes and adds are actually moves. This is done by
355 analyzing the actual contents of the files according to a crude algorithm to
356 do fuzzy comparisons, so that even files which were modified as well as moved
357 are discovered.
358
359 Release 0.14, 2002-06-21:
360
361 Bugfix: mcvs add was broken for files that have no suffix, causing
362 the underlying cvs add to fail. This was broken in 0.7 when type
363 handling was added.
364
365 Release 0.13, 2002-06-06:
366
367 Sandbox synchronization now handles the case of two files having
368 the same timestamp. An error is signaled, with interactive resolution
369 to synchronize either way, or do nothing.
370
371 If a file must be deleted on update, and this cannot be done, it
372 is now a continuable error.
373
374 Bugfix: pass -I ! to cvs import so that it won't ignore some F- files
375 whose suffix is one of the ones cvs ignores by default.
376
377 New command: mcvs remap. The user can move or delete files directly without
378 going through Meta-CVS. When mcvs remap is invoked, it will hunt down the
379 moves and deletions, and reconstruct the mapping accordingly; that is,
380 it remaps the new structure. This command uses inode numbers to identify
381 files; if a file is copied and then the original is deleted, that won't
382 be recognized as a move.
383
384 Release 0.12, 2002-04-18:
385
386 Bugfix: remove was broken in 0.10, fixed now.
387
388 Bugfix: status, diff, etc. work in empty project rather than complaining
389 ``. not known to Meta-CVS''.
390
391 The checkout operation now can now populate an existing directory, including
392 the current working directory (mcvs co -d . modulename). Of course, the
393 target directory cannot be an existing Meta-CVS sandbox.
394 This is a useful feature, which allows sandboxes to blend with an
395 existing directory structure.
396
397 Checkout now uses the same function for generating the sandbox
398 structure as does update. This is now necessary, because local files
399 can be clobbered by the checkout.
400
401 Release 0.11, 2002-04-12:
402
403 Bugfix: when branch invokes rtag, it now takes the CVSROOT information
404 from CVS/Root and passes it via -d. This is necessary because rtag does not
405 look at a local CVS subdirectory for this information, only the
406 -d option or the environment variable.
407
408 Command for listing branches added (list-branches or lb). Also shows
409 what sticky tag the sandbox is updated to.
410
411 Command for switching branches added (switch or sw).
412
413 Merge detects that working copy is on non-branch tag and bails.
414
415 Absolute paths can now be specified as file arguments. These are
416 based from the root directory of the sandbox, not the actual filesystem root
417 directory.
418
419 Release 0.10, 2002-04-03:
420
421 Automatic merging implemented. Branch is created using branch command,
422 and merging from another branch is done using simple merge command.
423 Meta-CVS maintains the tags to keep track of what has been merged
424 from what branch to what branch.
425
426 Bugfix: checkout -d foo bar was complaining about directory bar already
427 existing, even though it should only care about foo.
428
429 The remove command now requires explicit -R option to recursively remove
430 a directory. It has more detailed error reporting.
431
432 The move command has better error reporting.
433
434 Release 0.9, 2002-03-14:
435
436 Bugfix: the .cvsignore file is now subject to tagging, status, etc,
437 (unless --nometa is specified, of course).
438
439 The mcvs filt command takes -r <revision> or -D <date> parameters.
440 This means to retrieve the MAP file as of the specified revision or
441 date and use that mapping to perform the filtering translation,
442 rather than using MAP-LOCAL.
443
444 The mcvs update command takes filename arguments now and also
445 supports the -p option.
446
447 Release 0.8, 2002-03-13:
448
449 Bug fixed in mcvs add; it was not ignoring files that are already
450 listed as :ignore in MCVS/TYPES.
451
452 Bug fixed in mcvs move: a target with a trailing slash is now treated
453 as a directory (if it does not already exist and is a non-directory).
454
455 The -d option of mcvs checkout can now be used to override the checkout
456 directory, which is normally the same as the module name.
457
458 The global options --version, --help, -q, -Q and -e are now supported.
459
460 New global options --error-continue and --error-terminate to disable
461 interactive error handling in two different ways.
462
463 Log level of many messages has changed; many messages have been
464 relegated to debug level.
465
466 The import command now creates a .cvsignore file containing the name
467 MAP-LOCAL.
468
469 Release 0.7, 2002-03-09:
470
471 The import command collects a list of the file suffixes and brings up
472 a text editor to allow the user to edit their CVS keyword expansion
473 behavior. This information is kept in a new metafile called TYPES. The
474 add command also updates TYPES; it identifies any suffixes which are new,
475 and brings up an editor. The F- files now carry suffixes, which
476 simplifies interfacing with CVS, and also allows cvswrappers to work.
477
478 Recursive add works (mcvs add -R ...).
479
480 New command line option --nometa allows metafiles to be excluded from
481 diff, tag, and other commands; without the option they are inserted
482 into the list of files to be processed.
483
484 The commit option now takes an optional list of files or directories,
485 just like tag, diff, and others.
486
487 Release 0.6, 2002-02-16:
488
489 The add operation was horribly broken in 0.5, it is fixed.
490
491 User can interactively select whether to clobber local files or leave
492 everything alone. Effects on the mapping file of a mcvs move are undone,
493 if the restructuring is rolled back, or raises a condition that leads
494 to termination.
495
496 Meta-CVS now keeps a new meta-file called MCVS/TYPES. This is created
497 during import, and specifies the CVS keyword expansion mode for files
498 having given suffixes, and can also tell Meta-CVS to ignore certain files
499 when importing or adding.
500
501 Release 0.5, 2002-02-10:
502
503 Much improved error handling. Filesystem rearranging code performs
504 sanity checks to prevent adds and moves from accidentally clobbering
505 local files. A rearranging gone bad can be rolled back. Effects
506 of a failed mcvs add can also be rolled back.
507
508 MAP-LOCAL is now sorted in the same way as MAP.
509
510 Release 0.4, 2002-02-04:
511
512 CVS is invoked using internal function resembling the xargs utility,
513 which ensures that multiple command lines are generated if necessary to
514 avoid surpassing the operating system limit on argument and environment
515 vector size. This is important when someone wants to diff or stat a
516 subdirectory, which requires Meta-CVS to pick out the individual files
517 at the CVS level.
518
519 The tag, log, status and annotate commands are now available.
520
521 The MAP file is sorted on F- file names now, not path names. This
522 improves merging, since files do not move within the file when
523 they are renamed.
524
525 Release 0.3, 2002-02-02:
526
527 Process termination done is properly in top level handler, by a nonlocal
528 exit. The program properly indicates failed termination when it exits
529 due to an error condition.
530
531 Corrections are made in the command line option processing. If z is an
532 option that takes an argument, and the argument is -zx, then x is
533 treated as the argument to the option. Long options arguments are
534 recognized properly, according to the --opt=arg convention. The option
535 processing is restructured. Most of the commands now take the
536 appropriate cvs command-specific options.
537
538 The update algorithm performs dupe checking over the map, which could
539 happen during a merge.
540
541 Some more bugfixing has been done to the move command. It was still not
542 handling right some cases of an unversioned file being clobbered. Also,
543 it wasn't renaming a directory containing just one file.
544
545 I did some performance investigation for larger file sets, and
546 ended up rewriting the code that computes filesystem restructuring
547 changes and map duplicates.
548
549 Release 0.2, 2002-01-30:
550
551 Changed official name from MCVS to Meta-CVS. The move command now
552 performs some filesystem tests so it does the right thing when a versioned
553 file is moved over a non-versioned file, or when a file is moved into
554 a directory not known to Meta-CVS. Factored out reading and writing of
555 map files into functions.
556
557 Release 0.1, 2002-01-28:
558
559 Support for mcvs diff -u added. The -R option works for mcvs add command.
560 Bug fixed in mcvs mv command; it wasn't working analogously to the Unix
561 mv command when copying a directory to an existing directory.
562
563 Release 0.0, 2002-01-27:
564
565 This is alpha software. It is not complete, and lacks documentation.
566 However, it is already usable in its present state and is being used for
567 version control by its author. If you can program in Common Lisp and would
568 like to help, take a look through the TODO file. Send me patches, ideas,
569 feature requests.

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