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Contents of /meta-cvs/F-B3689DBB46386B16F4B2331934B69223

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Revision 1.91 - (show annotations)
Sun Aug 4 15:49:29 2002 UTC (11 years, 8 months ago) by kaz
Branch: MAIN
Changes since 1.90: +6 -0 lines
Retargetting CVS with new system call bindings that are not GNU/Linux
1 Release Notes for Meta-CVS
3 Release 0.21, 2002-08-??:
5 Syntax of grab command changed. The branch is no longer specified as an
6 argument, but using the -r command option. If no revision is specified with
7 -r, then a -A must be specified to make the grab go to the main trunk. This
8 is a safety feature, since grabbing foreign snapshots to the trunk is almost
9 always wrong, though it could be useful during backup recovery, or for fixing
10 mistakes.
12 The way operating system functions are targetted has changed. Instead of
13 relying on the ``linuxlibc6'' module provided by CLISP, Meta-CVS now
14 has its own module for calling foreign functions. This module is portable;
15 it does not depend on the layout of glibc data structures. So Meta-CVS
16 is in theory now portable to other Unixes (provided they have /dev/urandom).
18 Release 0.20, 2002-07-27:
20 The commit command does a true global commit when given no file or directory
21 parameters, and not given the --metaonly option. This means commiting all
22 changes in the MCVS directory, even if they are in F-files that are not
23 currently mapped.
25 Release 0.19, 2002-07-16:
27 When moving multiple files or directories to a subdirectory, a
28 restart is now provided to skip over bad ones and continue.
30 Grab no longer scans files if there are only added files, or only removed
31 files. There are no moves to deduce in that case.
33 Restore properly creates lost+found at the root of a partial sandbox,
34 rather than at the abstract root of the module.
36 Some other algorithmic improvements made.
38 The first few sections of a user guide have been written.
40 Release 0.18, 2002-07-07:
42 Cool new feature: checkout takes an extra argument, which specifies a
43 subdirectory of the project. Specifying a subdirectory results in a ``partial
44 sandbox'', whose root directory is the specified subdirectory of the larger
45 project. The rest of the project is ``invisible'' to that sandbox. A
46 subdirectory argument can also be given to mcvs grab, which will cause it to
47 integrate the new source tree against a subtree of the Meta-CVS project
48 rather than the entire project. The subtree doesn't have to exist; in
49 that case you get an empty sandbox. Adding files to this sandbox will cause
50 the tree to exist in the project.
52 Bugfix: mcvs grab was not computing moves properly over small file sets,
53 wrongly treating them as removes and adds.
55 Release 0.17, 2002-07-02:
57 The create command no longer takes a vendor branch. Instead the symbol
58 ``Created-by-Meta-CVS'' is used as the vendor tag to satisfy CVS.
60 The grab command no longer does useless synchronization on files that
61 are about to be deleted.
63 New purge command; does ``cvs rm'' on deleted files, that is to say, F- files
64 that have no mapping.
66 New restore command; re-enters deleted files into the mapping, under
67 the ``lost+found'' directory, using their F- names as sandbox names.
69 Bugfix: when a checkout bails because it is requested over top of an existing
70 working copy, it must not delete that working copy's MCVS sub directory.
72 Release 0.16, 2002-06-29:
74 Added new heuristics to grab command. Paths are analyzed to determine
75 move distance. Greater distances reduce the confidence in a move.
76 These rules help sort out grabs in a project where similar or
77 duplicate files are subject to parallel moves, the ambiguity being
78 resolved by favoring shorter moves. Word comparisons are case-insensitive
79 now. Common words (those that appear in many files) are ignored when
80 comparing files.
82 New options, --meta and --metaonly. This area of Meta-CVS is cleaned
83 up a little bit. Most reporting commands like log or diff no longer
84 operate on meta files by default; they must be explicitly told to do
85 so with --meta or --metaonly. Only the commit command implicitly includes
86 metafiles by default, and so if this is not wanted, --nometa must be
87 selected. The update command remains special; if it is given file
88 arguments, it does not include meta files. If given no arguments, it
89 does a global CVS up across the entire project.
91 Release 0.15, 2002-06-25:
93 Optimized a string splitting routine which is used heavily for processing
94 paths; the result is a noticeable performance improvement in some commands
95 that process large numbers of files.
97 Renamed ``import'' command to ``create''.
99 Bugfix: checkout and create showed errors when removing directory, due to
100 broken :postorder support in directory walking function.
102 Bugfix: on failure, checkout was failing to delete the MCVS directory when
103 the checkout was directed to an existing directory.
105 New feature: ``mcvs grab'' command imports third-party snapshots to a
106 branch. This is invoked in the root directory of the source tree to import.
107 It determines what files have been added and removed in the snapshot, and
108 tries to compute which removes and adds are actually moves. This is done by
109 analyzing the actual contents of the files according to a crude algorithm to
110 do fuzzy comparisons, so that even files which were modified as well as moved
111 are discovered.
113 Release 0.14, 2002-06-21:
115 Bugfix: mcvs add was broken for files that have no suffix, causing
116 the underlying cvs add to fail. This was broken in 0.7 when type
117 handling was added.
119 Release 0.13, 2002-06-06:
121 Sandbox synchronization now handles the case of two files having
122 the same timestamp. An error is signaled, with interactive resolution
123 to synchronize either way, or do nothing.
125 If a file must be deleted on update, and this cannot be done, it
126 is now a continuable error.
128 Bugfix: pass -I ! to cvs import so that it won't ignore some F- files
129 whose suffix is one of the ones cvs ignores by default.
131 New command: mcvs remap. The user can move or delete files directly without
132 going through Meta-CVS. When mcvs remap is invoked, it will hunt down the
133 moves and deletions, and reconstruct the mapping accordingly; that is,
134 it remaps the new structure. This command uses inode numbers to identify
135 files; if a file is copied and then the original is deleted, that won't
136 be recognized as a move.
138 Release 0.12, 2002-04-18:
140 Bugfix: remove was broken in 0.10, fixed now.
142 Bugfix: status, diff, etc. work in empty project rather than complaining
143 ``. not known to Meta-CVS''.
145 The checkout operation now can now populate an existing directory, including
146 the current working directory (mcvs co -d . modulename). Of course, the
147 target directory cannot be an existing Meta-CVS sandbox.
148 This is a useful feature, which allows sandboxes to blend with an
149 existing directory structure.
151 Checkout now uses the same function for generating the sandbox
152 structure as does update. This is now necessary, because local files
153 can be clobbered by the checkout.
155 Release 0.11, 2002-04-12:
157 Bugfix: when branch invokes rtag, it now takes the CVSROOT information
158 from CVS/Root and passes it via -d. This is necessary because rtag does not
159 look at a local CVS subdirectory for this information, only the
160 -d option or the environment variable.
162 Command for listing branches added (list-branches or lb). Also shows
163 what sticky tag the sandbox is updated to.
165 Command for switching branches added (switch or sw).
167 Merge detects that working copy is on non-branch tag and bails.
169 Absolute paths can now be specified as file arguments. These are
170 based from the root directory of the sandbox, not the actual filesystem root
171 directory.
173 Release 0.10, 2002-04-03:
175 Automatic merging implemented. Branch is created using branch command,
176 and merging from another branch is done using simple merge command.
177 Meta-CVS maintains the tags to keep track of what has been merged
178 from what branch to what branch.
180 Bugfix: checkout -d foo bar was complaining about directory bar already
181 existing, even though it should only care about foo.
183 The remove command now requires explicit -R option to recursively remove
184 a directory. It has more detailed error reporting.
186 The move command has better error reporting.
188 Release 0.9, 2002-03-14:
190 Bugfix: the .cvsignore file is now subject to tagging, status, etc,
191 (unless --nometa is specified, of course).
193 The mcvs filt command takes -r <revision> or -D <date> parameters.
194 This means to retrieve the MAP file as of the specified revision or
195 date and use that mapping to perform the filtering translation,
196 rather than using MAP-LOCAL.
198 The mcvs update command takes filename arguments now and also
199 supports the -p option.
201 Release 0.8, 2002-03-13:
203 Bug fixed in mcvs add; it was not ignoring files that are already
204 listed as :ignore in MCVS/TYPES.
206 Bug fixed in mcvs move: a target with a trailing slash is now treated
207 as a directory (if it does not already exist and is a non-directory).
209 The -d option of mcvs checkout can now be used to override the checkout
210 directory, which is normally the same as the module name.
212 The global options --version, --help, -q, -Q and -e are now supported.
214 New global options --error-continue and --error-terminate to disable
215 interactive error handling in two different ways.
217 Log level of many messages has changed; many messages have been
218 relegated to debug level.
220 The import command now creates a .cvsignore file containing the name
223 Release 0.7, 2002-03-09:
225 The import command collects a list of the file suffixes and brings up
226 a text editor to allow the user to edit their CVS keyword expansion
227 behavior. This information is kept in a new metafile called TYPES. The
228 add command also updates TYPES; it identifies any suffixes which are new,
229 and brings up an editor. The F- files now carry suffixes, which
230 simplifies interfacing with CVS, and also allows cvswrappers to work.
232 Recursive add works (mcvs add -R ...).
234 New command line option --nometa allows metafiles to be excluded from
235 diff, tag, and other commands; without the option they are inserted
236 into the list of files to be processed.
238 The commit option now takes an optional list of files or directories,
239 just like tag, diff, and others.
241 Release 0.6, 2002-02-16:
243 The add operation was horribly broken in 0.5, it is fixed.
245 User can interactively select whether to clobber local files or leave
246 everything alone. Effects on the mapping file of a mcvs move are undone,
247 if the restructuring is rolled back, or raises a condition that leads
248 to termination.
250 Meta-CVS now keeps a new meta-file called MCVS/TYPES. This is created
251 during import, and specifies the CVS keyword expansion mode for files
252 having given suffixes, and can also tell Meta-CVS to ignore certain files
253 when importing or adding.
255 Release 0.5, 2002-02-10:
257 Much improved error handling. Filesystem rearranging code performs
258 sanity checks to prevent adds and moves from accidentally clobbering
259 local files. A rearranging gone bad can be rolled back. Effects
260 of a failed mcvs add can also be rolled back.
262 MAP-LOCAL is now sorted in the same way as MAP.
264 Release 0.4, 2002-02-04:
266 CVS is invoked using internal function resembling the xargs utility,
267 which ensures that multiple command lines are generated if necessary to
268 avoid surpassing the operating system limit on argument and environment
269 vector size. This is important when someone wants to diff or stat a
270 subdirectory, which requires Meta-CVS to pick out the individual files
271 at the CVS level.
273 The tag, log, status and annotate commands are now available.
275 The MAP file is sorted on F- file names now, not path names. This
276 improves merging, since files do not move within the file when
277 they are renamed.
279 Release 0.3, 2002-02-02:
281 Process termination done is properly in top level handler, by a nonlocal
282 exit. The program properly indicates failed termination when it exits
283 due to an error condition.
285 Corrections are made in the command line option processing. If z is an
286 option that takes an argument, and the argument is -zx, then x is
287 treated as the argument to the option. Long options arguments are
288 recognized properly, according to the --opt=arg convention. The option
289 processing is restructured. Most of the commands now take the
290 appropriate cvs command-specific options.
292 The update algorithm performs dupe checking over the map, which could
293 happen during a merge.
295 Some more bugfixing has been done to the move command. It was still not
296 handling right some cases of an unversioned file being clobbered. Also,
297 it wasn't renaming a directory containing just one file.
299 I did some performance investigation for larger file sets, and
300 ended up rewriting the code that computes filesystem restructuring
301 changes and map duplicates.
303 Release 0.2, 2002-01-30:
305 Changed official name from MCVS to Meta-CVS. The move command now
306 performs some filesystem tests so it does the right thing when a versioned
307 file is moved over a non-versioned file, or when a file is moved into
308 a directory not known to Meta-CVS. Factored out reading and writing of
309 map files into functions.
311 Release 0.1, 2002-01-28:
313 Support for mcvs diff -u added. The -R option works for mcvs add command.
314 Bug fixed in mcvs mv command; it wasn't working analogously to the Unix
315 mv command when copying a directory to an existing directory.
317 Release 0.0, 2002-01-27:
319 This is alpha software. It is not complete, and lacks documentation.
320 However, it is already usable in its present state and is being used for
321 version control by its author. If you can program in Common Lisp and would
322 like to help, take a look through the TODO file. Send me patches, ideas,
323 feature requests.

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