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revision 1.127 by kaz, Mon Oct 7 03:53:17 2002 UTC revision 1.127.2.56 by kaz, Thu May 1 05:34:31 2003 UTC
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1                         Release Notes for Meta-CVS                         Release Notes for Meta-CVS
2    
3    Release 1.0.8, 2003-0?-??:
4    
5      The Cygwin /dev/tty problem is partially addressed. The program
6      won't fail if /dev does not exist, but emits a warning message,
7      and disables interactive error handling. The workaround is to use
8      ``mkdir /dev''. This is a CLISP issue; its OPEN function expects the
9      full path to a file to actually exist, but on Cygwin, there are fake
10      /dev/* paths even though /dev does not exist.  If a real /dev directory
11      does in fact exist, it does not interfere with these magic paths.
12    
13    Release 1.0.7, 2003-04-23:
14    
15      New commands sync-to-cvs and sync-from-cvs expose the hard link
16      synchronization algorithm.
17    
18      Revamped error recovery logic. To continue in an error situation now
19      consistently means ``take the bold action that may erase data''
20      or ``proceed in the most obvious way to finish the specified job''.
21      It never means ``roll back the operation and bail'', which was
22      confusing.
23    
24      Termination is no longer unsafe; the `T' menu command, and the
25      equivalent --error-terminate global option perform all necessary
26      restoration and cleanup.
27    
28      Errors that have more information to print, like a list of files or
29      whatever, now indicate it in a standard way which translates to the
30      `I' menu command.
31    
32      Chatter output goes to standard error rather than standard output,
33      as do all error messages.
34    
35      The interactive error menu now talks to the user using the controlling
36      tty, meaning that it will work even if the input or output of the
37      mcvs command are redirected. If no controlling tty is available,
38      then interactive error handling is disabled; the default behavior
39      is then like --error-terminate but can of course be overridden by
40      --error-continue.
41    
42    Release 1.0.6, 2003-04-14:
43    
44      The create command detects the existence of text editor backup files (or
45      other junk) in the MCVS directory after the editor is invoked on the
46      TYPES file. The user is prompted regarding their removal. If these files are
47      not removed, cvs import will bring them into the repository.
48    
49      When Meta-CVS has to split a large CVS command into two or more
50      invocations with shorter argument lists, it now does not stop when one of
51      these invocations is unsuccessful; it does all of them, and combines
52      their termination indications by a logical AND. There was a bug in this
53      logic also which caused, upon termination failure, a cvs command to be
54      repeated for the same list of files.
55    
56      Synchronization logic has been revamped. Unnecessary synchronizations
57      have been removed, which will make some commands run faster.
58      Synchronizations now have specific directions; for instance before
59      a CVS commit or update, changes are pushed from the directory tree to the MCVS
60      directory only, and after the CVS operation, in the reverse direction only.
61    
62      Meta-CVS will no longer re-create missing F- files by linking from the
63      directory tree. Doing this causes two problems. One is that if a user
64      manually removes a F- file and do ``mcvs up'', she wants CVS to fetch a clean
65      copy and push it into the tree. She does not want the file to be restored
66      from the tree prior to the CVS update. Secondly, sometimes CVS itself
67      removes files. If we re-create the files, CVS will consider them to
68      be ``in the way''.
69    
70      Failures to read from the MAP or MAP-LOCAL files are treated as interactive,
71      continuable errors. By continuing, the user agrees that the behavior will
72      be as if an empty map were read.
73    
74      The grab command uses less memory for performing move analysis.
75    
76    Release 1.0.5, 2003-02-25:
77    
78      Bugfix: some one-argument command line options of CVS must be
79      specifies as a single parameter, with no separation between the
80      option letter and the argument characters. For example:
81    
82        cvs log -r rev-1::rev-2      # invalid
83        cvs log -rrev1::rev2         # correct
84    
85      Meta-CVS accepts either syntax, but it was generating the first form
86      when calling CVS. Now, *all* one-letter options that have an argument
87      are formatted in the second manner.
88    
89      Bugfix: one more waitpid() issue was fixed; on fast machines, under
90      Linux, it was observed that from time to time Meta-CVS would get
91      a -1/ECHILD when waiting for the CVS process.
92    
93    Release 1.0.4, 2003-02-20:
94    
95      Fix remaining occurences of the CVS ``No child processes'' abort
96      problem, affecting the list-branches command, merge command
97      and the -r option of the filt command.
98    
99    Release 1.0.3, 2003-02-12:
100    
101      ! THIS RELEASE IS WITHDRAWN. It was accidentally created from the
102      ! experimental main trunk of the Meta-CVS codebase, rather than
103      ! the 1.0 branch. But 1.0.4 does contain all of the changes
104      ! described here.
105    
106      Fix for the CVS ``No child processes'' abort problem. It turns out
107      that CLISP sets the signal handling action for the SIGCHLD signal
108      to SIG_IGN, which is inherited by child processes across the
109      fork() and execvp() calls used in our mcvs_spawn() function.
110      We correct the problem by resetting the signal handler to SIG_DFL
111      just before executing the new process image.
112    
113      New feature, --up option. The argument is a nonnegative integer value
114      (default is zero) which specifies how many sandbox nesting levels to
115      escape out of when locating the sandbox root. This helps work with
116      nested Meta-CVS sandboxes.
117    
118    Release 1.0.2, 2003-02-10:
119    
120      Bugfix in waitpid logic in the C library for running external processes;
121      we were not dealing with an interrupted waitpid.
122    
123      Behavior of mcvs tag is changed: when there are no filename arguments,
124      the whole tree is tagged including the metafiles. In other words, it
125      now works like the commit command.
126    
127    Release 1.0.1, 2003-01-30:
128    
129      Hard link sync optimization: update of a subset of files, commit, and
130      other operations like log and diff don't need to synchronize all
131      hard links, just the ones operated on.
132    
133      The merge and remerge commands support -k option for overriding
134      CVS keyword expansion mode.
135    
136      Fixes to getcwd error handling.
137    
138      Improvement in install.sh script's logic for locating CLISP installation
139      directory.
140    
141    Release 1.0, 2003-01-01:
142    
143      NOTE: It's not possible to upgrade to this release via mcvs-upgrade,
144      because it adds some new C functions to the Lisp executable.
145    
146      Security fix: read-time evaluation was not suppressed when reading
147      structured data, like MCVS/MAP and MCVS/TYPES. This means that it
148      was possible for Alice to check in something that would execute
149      arbitrary code on Bob's computer.
150    
151      Optimization: use fork and exec to launch CVS rather than CLISP's
152      run-program function, which indirects through the shell interpreter.
153      (On Cygwin, the spawnvp function is used).
154    
155      Performance fix: stat() was being called superfluously by the
156      hard synchronization code, twice for each file.
157    
158      Build fix: install.sh works when CLISP executable is called ``lisp.exe'',
159      which is the case under Cygwin with newer CLISP releases.
160    
161    Release 0.99, 2002-11-17:
162    
163      New link command for creating symbolic links.
164    
165      Global option -n (dry run---don't modify filesystem) is processed
166      internally now, not just passed to CVS.
167    
168      Failure to invoke text editor is handled.
169    
170      The -r option of filt is fixed; it has been broken since the change to the
171      new MAP format, because it was reading the raw map representation, not
172      passing it through the right conversion steps that are needed now.
173    
174      Bugfix to purge and remap commands: they were fooled by CVS-generated
175      files in the MCVS/CVS directory. Specifically, files having F- names, and a
176      the suffix ,t.
177    
178      Bugfix to add logic in directory restructuring: there was the possibility
179      of mistakingly taking a clobbered local file to be a new local version of
180      the added file, instead of replacing it. This could happen if the local
181      file had a future timestamp relative to the one coming from the repository.
182    
183      The prop command does not synchronize or write out map if no options are
184      specified.
185    
186      Help text added for move and branch commands. Help text for grab rewritten.
187    
188      The CVSEDITOR and VISUAL environment variables are now checked, not
189      only EDITOR.
190    
191    Release 0.98, 2002-10-13:
192    
193      The prop command was mistakenly reading from MAP-LOCAL and writing to MAP,
194      which could cause information loss if the two differ. It now reads from MAP
195      and writes to MAP. (The property changes propagate to MAP-LOCAL by the
196      update operation invoked by prop, as before).
197    
198      Invocation of external programs included in debug trace.
199    
200      The filt command does not filter F- names if they are immediately preceded by
201      the MCVS/ prefix; such occurences are clearly concrete, sandbox-relative
202      references to the actual F- links, rather than abstract references.
203    
204      The update command now supports the -C option, to fetch the repository
205      copy, throwing away local changes. It also now honors the --metaonly
206      and --nometa options.
207    
208      The export command has been added, for checking out documents without creating
209      a working copy (no MCVS directory in the root of the checkout).
210    
211      The watch command has been added. Note that its syntax differs from that
212      of CVS.
213    
214      The watchers, editors, edit, and unedit commands have been added.
215    
216      A script called mcvs-upgrade is now included, and installs alongside the mcvs
217      script.  This allows the Meta-CVS Lisp image to recompile and patch itself,
218      giving users of binary distributions an easy way to upgrade from source
219      code.
220    
221  Release 0.97, 2002-10-06:  Release 0.97, 2002-10-06:
222    
223    Meta-CVS now builds and runs on Microsoft Windows, under Cygwin    Meta-CVS now builds and runs on Microsoft Windows, under Cygwin

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