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

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Revision 1.127.2.39 - (show annotations)
Thu Feb 13 07:20:49 2003 UTC (11 years, 2 months ago) by kaz
Branch: mcvs-1-0-branch
Changes since 1.127.2.38: +5 -0 lines
New --up option added for escaping out of nested sandboxes.

* code/mcvs-main.lisp (*cvs-options*): Added "up" 1 arg option.

* code/options.lisp (*nesting-escape-option*): New global,
default value 0.
(filter-mcvs-options): Filter new option, parse out and validate
integer argument.

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

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