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revision 1.127 by kaz, Mon Oct 7 03:53:17 2002 UTC revision 1.127.2.60 by kaz, Wed Jul 16 15:44:11 2003 UTC
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1                         Release Notes for Meta-CVS                         Release Notes for Meta-CVS
2    
3    Release 1.0.9, 2003-0?-??:
4    
5      Failures to open terminal for reasons other than non-existence
6      of the object are handled (e.g. ``no such device'', etc).
7    
8      The --nometa option now works properly in those commands that
9      operate on the whole project when no file arguments are given
10      (tag, update, commit). Also, these commands no longer implicitly
11      include the meta files when file arguments *are* given.
12      These files can be included explicitly with the --meta global option.
13    
14    Release 1.0.8, 2003-06-03:
15    
16      The Cygwin /dev/tty problem is partially addressed. The program
17      won't fail if /dev does not exist, but emits a warning message,
18      and disables interactive error handling. The workaround is to use
19      ``mkdir /dev''. This is a CLISP issue; its OPEN function expects the
20      full path to a file to actually exist, but on Cygwin, there are fake
21      /dev/* paths even though /dev does not exist.  If a real /dev directory
22      does in fact exist, it does not interfere with these magic paths.
23    
24      The ``mcvs fi'' command no longer performs expansion on F- names
25      that are preceded by a slash.
26    
27    Release 1.0.7, 2003-04-23:
28    
29      New commands sync-to-cvs and sync-from-cvs expose the hard link
30      synchronization algorithm.
31    
32      Revamped error recovery logic. To continue in an error situation now
33      consistently means ``take the bold action that may erase data''
34      or ``proceed in the most obvious way to finish the specified job''.
35      It never means ``roll back the operation and bail'', which was
36      confusing.
37    
38      Termination is no longer unsafe; the `T' menu command, and the
39      equivalent --error-terminate global option perform all necessary
40      restoration and cleanup.
41    
42      Errors that have more information to print, like a list of files or
43      whatever, now indicate it in a standard way which translates to the
44      `I' menu command.
45    
46      Chatter output goes to standard error rather than standard output,
47      as do all error messages.
48    
49      The interactive error menu now talks to the user using the controlling
50      tty, meaning that it will work even if the input or output of the
51      mcvs command are redirected. If no controlling tty is available,
52      then interactive error handling is disabled; the default behavior
53      is then like --error-terminate but can of course be overridden by
54      --error-continue.
55    
56    Release 1.0.6, 2003-04-14:
57    
58      The create command detects the existence of text editor backup files (or
59      other junk) in the MCVS directory after the editor is invoked on the
60      TYPES file. The user is prompted regarding their removal. If these files are
61      not removed, cvs import will bring them into the repository.
62    
63      When Meta-CVS has to split a large CVS command into two or more
64      invocations with shorter argument lists, it now does not stop when one of
65      these invocations is unsuccessful; it does all of them, and combines
66      their termination indications by a logical AND. There was a bug in this
67      logic also which caused, upon termination failure, a cvs command to be
68      repeated for the same list of files.
69    
70      Synchronization logic has been revamped. Unnecessary synchronizations
71      have been removed, which will make some commands run faster.
72      Synchronizations now have specific directions; for instance before
73      a CVS commit or update, changes are pushed from the directory tree to the MCVS
74      directory only, and after the CVS operation, in the reverse direction only.
75    
76      Meta-CVS will no longer re-create missing F- files by linking from the
77      directory tree. Doing this causes two problems. One is that if a user
78      manually removes a F- file and do ``mcvs up'', she wants CVS to fetch a clean
79      copy and push it into the tree. She does not want the file to be restored
80      from the tree prior to the CVS update. Secondly, sometimes CVS itself
81      removes files. If we re-create the files, CVS will consider them to
82      be ``in the way''.
83    
84      Failures to read from the MAP or MAP-LOCAL files are treated as interactive,
85      continuable errors. By continuing, the user agrees that the behavior will
86      be as if an empty map were read.
87    
88      The grab command uses less memory for performing move analysis.
89    
90    Release 1.0.5, 2003-02-25:
91    
92      Bugfix: some one-argument command line options of CVS must be
93      specifies as a single parameter, with no separation between the
94      option letter and the argument characters. For example:
95    
96        cvs log -r rev-1::rev-2      # invalid
97        cvs log -rrev1::rev2         # correct
98    
99      Meta-CVS accepts either syntax, but it was generating the first form
100      when calling CVS. Now, *all* one-letter options that have an argument
101      are formatted in the second manner.
102    
103      Bugfix: one more waitpid() issue was fixed; on fast machines, under
104      Linux, it was observed that from time to time Meta-CVS would get
105      a -1/ECHILD when waiting for the CVS process.
106    
107    Release 1.0.4, 2003-02-20:
108    
109      Fix remaining occurences of the CVS ``No child processes'' abort
110      problem, affecting the list-branches command, merge command
111      and the -r option of the filt command.
112    
113    Release 1.0.3, 2003-02-12:
114    
115      ! THIS RELEASE IS WITHDRAWN. It was accidentally created from the
116      ! experimental main trunk of the Meta-CVS codebase, rather than
117      ! the 1.0 branch. But 1.0.4 does contain all of the changes
118      ! described here.
119    
120      Fix for the CVS ``No child processes'' abort problem. It turns out
121      that CLISP sets the signal handling action for the SIGCHLD signal
122      to SIG_IGN, which is inherited by child processes across the
123      fork() and execvp() calls used in our mcvs_spawn() function.
124      We correct the problem by resetting the signal handler to SIG_DFL
125      just before executing the new process image.
126    
127      New feature, --up option. The argument is a nonnegative integer value
128      (default is zero) which specifies how many sandbox nesting levels to
129      escape out of when locating the sandbox root. This helps work with
130      nested Meta-CVS sandboxes.
131    
132    Release 1.0.2, 2003-02-10:
133    
134      Bugfix in waitpid logic in the C library for running external processes;
135      we were not dealing with an interrupted waitpid.
136    
137      Behavior of mcvs tag is changed: when there are no filename arguments,
138      the whole tree is tagged including the metafiles. In other words, it
139      now works like the commit command.
140    
141    Release 1.0.1, 2003-01-30:
142    
143      Hard link sync optimization: update of a subset of files, commit, and
144      other operations like log and diff don't need to synchronize all
145      hard links, just the ones operated on.
146    
147      The merge and remerge commands support -k option for overriding
148      CVS keyword expansion mode.
149    
150      Fixes to getcwd error handling.
151    
152      Improvement in install.sh script's logic for locating CLISP installation
153      directory.
154    
155    Release 1.0, 2003-01-01:
156    
157      NOTE: It's not possible to upgrade to this release via mcvs-upgrade,
158      because it adds some new C functions to the Lisp executable.
159    
160      Security fix: read-time evaluation was not suppressed when reading
161      structured data, like MCVS/MAP and MCVS/TYPES. This means that it
162      was possible for Alice to check in something that would execute
163      arbitrary code on Bob's computer.
164    
165      Optimization: use fork and exec to launch CVS rather than CLISP's
166      run-program function, which indirects through the shell interpreter.
167      (On Cygwin, the spawnvp function is used).
168    
169      Performance fix: stat() was being called superfluously by the
170      hard synchronization code, twice for each file.
171    
172      Build fix: install.sh works when CLISP executable is called ``lisp.exe'',
173      which is the case under Cygwin with newer CLISP releases.
174    
175    Release 0.99, 2002-11-17:
176    
177      New link command for creating symbolic links.
178    
179      Global option -n (dry run---don't modify filesystem) is processed
180      internally now, not just passed to CVS.
181    
182      Failure to invoke text editor is handled.
183    
184      The -r option of filt is fixed; it has been broken since the change to the
185      new MAP format, because it was reading the raw map representation, not
186      passing it through the right conversion steps that are needed now.
187    
188      Bugfix to purge and remap commands: they were fooled by CVS-generated
189      files in the MCVS/CVS directory. Specifically, files having F- names, and a
190      the suffix ,t.
191    
192      Bugfix to add logic in directory restructuring: there was the possibility
193      of mistakingly taking a clobbered local file to be a new local version of
194      the added file, instead of replacing it. This could happen if the local
195      file had a future timestamp relative to the one coming from the repository.
196    
197      The prop command does not synchronize or write out map if no options are
198      specified.
199    
200      Help text added for move and branch commands. Help text for grab rewritten.
201    
202      The CVSEDITOR and VISUAL environment variables are now checked, not
203      only EDITOR.
204    
205    Release 0.98, 2002-10-13:
206    
207      The prop command was mistakenly reading from MAP-LOCAL and writing to MAP,
208      which could cause information loss if the two differ. It now reads from MAP
209      and writes to MAP. (The property changes propagate to MAP-LOCAL by the
210      update operation invoked by prop, as before).
211    
212      Invocation of external programs included in debug trace.
213    
214      The filt command does not filter F- names if they are immediately preceded by
215      the MCVS/ prefix; such occurences are clearly concrete, sandbox-relative
216      references to the actual F- links, rather than abstract references.
217    
218      The update command now supports the -C option, to fetch the repository
219      copy, throwing away local changes. It also now honors the --metaonly
220      and --nometa options.
221    
222      The export command has been added, for checking out documents without creating
223      a working copy (no MCVS directory in the root of the checkout).
224    
225      The watch command has been added. Note that its syntax differs from that
226      of CVS.
227    
228      The watchers, editors, edit, and unedit commands have been added.
229    
230      A script called mcvs-upgrade is now included, and installs alongside the mcvs
231      script.  This allows the Meta-CVS Lisp image to recompile and patch itself,
232      giving users of binary distributions an easy way to upgrade from source
233      code.
234    
235  Release 0.97, 2002-10-06:  Release 0.97, 2002-10-06:
236    
237    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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