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Contents of /meta-cvs/F-B3689DBB46386B16F4B2331934B69223

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Revision 1.153 - (show annotations)
Thu Jan 2 04:02:51 2003 UTC (11 years, 3 months ago) by kaz
Branch: MAIN
Changes since 1.152: +2 -1 lines
Merging from mcvs-1-0-branch.

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

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