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Contents of /meta-cvs/F-B3689DBB46386B16F4B2331934B69223

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Revision 1.156 - (show annotations)
Sun Jan 26 00:50:13 2003 UTC (11 years, 2 months ago) by kaz
Branch: MAIN
Changes since 1.155: +2 -0 lines
Merging from mcvs-1-0-branch.

* code/unix-bindings/wrap.c (mcvs_getcwd): If getcwd() returns
NULL, it only means that the buffer is too small if errno is also
set to ERANGE. This second condition was not being tested.

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

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