386BSD 0.1 development

[unix-history] / usr / othersrc / public / cvs-1.3 / TODO

@(#)TODO 1.22 92/04/10

14. Pathname stripper, for checkout, as well as for writing the
    Repository file.
    [[ I have a simple one, but need to make sure to call it at all the
       appropriate points ]]

16. List of current users of a directory needs to be maintained.
    [[ sort of solved by history database ]]

22. Catch signals for cleanup when "add"ing files.

24. Insist on a log message.

30. Add "patch" program option to the modules database.

31. Think hard about ^C recovery.

35. Add "admin" command as an interface to "rcs".
    [[ a cheesy version is there, but it should be re-done ]]

38. Think hard about using RCS state information to allow one to checkin
    a new vendor release without having it be accessed until it has been
    integrated into the local changes.

39. Think about allowing parallel source trees that can easily track
    each other.
    [[ sort of solved with the automagic branch support, but I want more ]]

45. Consider enhancing the "patch" and "tag" command support in the module
    database -- they seem hard to use since these commands deal directly
    with the RCS ,v files.

46. Perhaps checkout/checkin/tag/patch commands should be imbedded in the
    file system directly, using special known command names?

49. cvs xxx commands should be able to deal with files in other
    directories.  I want to do a cvs ci foo/bar.c.  This complicates things
    a bit because one might specify files in different directories, but you
    could just bucket sort them and do everything for each directory
    together.  Other than that, it's just a matter of using the adm
    directory from the directory containing the file rather than the cwd.
    [[ most commands now use the generic recursion processor, but not all;
    this note is left here to remind me to fix the others ]]

51. a way to identify what files other people are working on.  Imagine "cvs
    modified", which prints out a table like 

	file	modifiers
	=====	=========
	foo.c
	bar.c	wsd
	baz.c	nrt jda

    I think this would be pretty difficult; I don't know if this
    information is stored anywhere.  Also it's hard to say how one gets a
    user name, maybe a path to their local hierarchy is all you could get.
    [[ the history stuff does some of this, but not all ]]

52. SCCS has a feature that I would *love* to see in CVS, as it is very
    useful.  One may make a private copy of SCCS suid to a particular user,
    so other users in the authentication list may check files in and out of
    a project directory without mucking about with groups.  Is there any
    plan to provide a similar functionality to CVS?  Our site (and, I'd
    imagine, many other sites with large user bases) has decided against
    having the user-groups feature of unix available to the users, due to
    perceived administrative, technical and performance headaches.  A tool
    such as CVS with features that provide group-like functionality would
    be a huge help.

53. I'd suggest a way to notify users if/when a file(s) is being worked on.
    I suggest:
	+ Always checkout/update files a readonly.
	+ To work on a file, the user should do:
		cvs advise filename
	+ This would maintain their email address associated with that
	  file name in the repository and change the file mode to writable.
	+ If other references to that file exist, the registered individuals
	  are notified via email that another user(s) is going to be working
	  on same.
	+ When a committ occurs, the user is automatically 'unadvise'd (the
	  inverse command should be supported as well) and other's are notified
	  that a merge will be necessary before their checkin can be
	  successful.

56. There should be a .cvsrc file that is sourced to customize various
    variables.  Perhaps there should be a system-wide .cvsrc file that is
    sourced, then the one in one's home directory, then the environment
    variables are checked for overriding values.

62. Consider using revision controlled files and directories to handle the
    new module format -- consider a cvs command front-end to
    add/delete/modify module contents, maybe.

63. The "import" and vendor support commands (co -j) need to be documented
    better.

64. Need to greatly increase the performance of an initial checkout.
    [[ it got better, then we added functionality, making it worse again ]]

66. Length of the CVS temporary files must be limited to 14 characters for
    System-V stupid support.  As weel as the length on the CVS.adm files.

67. cvs import should populate the vendor sources with CVS.adm files so
    that one could use the vendor sources directly without having the check
    them out.

69. Consider enhacing import to add a module automatically to the module
    database.  Perhaps with a new option, or perhaps with an editor.

72. Consider re-design of the module -o, -i, -t options to use the file
    system more intuitively.

73. Consider an option (in .cvsrc?) to automatically add files that are new
    and specified to commit.

74. Consider adding a way to remove directories/files that you are done
    with... somehow.
    [[ cvs release sort of does this ]]

76. Consider adding a layer of abstraction so that CVS can work with both
    RCS and SCCS files.  Larry says this should be #ifdef'ed.

79. Might be nice to have some sort of interface to TFS and tagged
    revisions.

82. Maybe the import stuff should allow an arbitrary revision to be
    specified.

84. Improve the documentation about administration of the repository and
    how to add/remove files and the use of symbolic links.

85. Add revision controlled symbolic links to CVS using one of the tag
    fields in the RCS file.

87. Consider renaming directories and files.

88. Consider using mmap to read files on Sun systems and using a smaller
    buffer to read files on other systems.  A patch has been supplied.

89. Study the new Dick Grune version of CVS and port any new interesting
    features to my version of CVS.

91. Better document the format of the source repository and how one might
    convert their current SCCS or RCS files into CVS format.

92. Look into this:
	After a bit of soul searching via dbx, I realized my sin was that I'd
	specified "echo" as the program to call from loginfo. The commit
	procedure worked fine till it hit my echo, then silently aborted
	leaving the lockfiles intact. Since I needn't use the loginfo
	facility, I simply removed those commands and it all works.

93. Need to think hard about release and development environments.  Think
    about execsets as well.

94. Need to think hard about remote source control and environments
    together.
    [[ a contributor has this working over Internet TCP links! ]]

97. Think about some way to undo a change.  This looks hard given the
    current framework of CVS.

98. If diff3 bombs out (too many differences) cvs then thinks that the file
    has been updated and is OK to be commited even though the file 
    has not yet been merged.

100. Checked out files should have revision control support.  Maybe.

102. Perhaps directory modes should be propagated on all import check-ins.
     Not necessarily uid/gid changes.

103. setuid/setgid on files is suspect.

104. cvs should recover nicely on unreadable files/directories.

105. cvs should have administrative tools to allow for changing permissions
     and modes and what not.

106. Need to figure out how to delete and rename directories from a release
     and yet have old releases still be accessible.

107. It should be possible to specify a list of symbolic revisions to
     checkout such that the list is processed in reverse order looking for
     matches within the RCS file for the symbolic revision.  If there is
     not a match, the next symbolic rev on the list is checked, and so on,
     until all symbolic revs are exhausted.  This would allow one to, say,
     checkout "4.0" + "4.0.3" + "4.0.3Patch1" + "4.0.3Patch2" to get the
     most recent 4.x stuff.  This is usually handled by just specifying the
     right release_tag, but most people forget to do this.

108. If someone creates a whole new directory (i.e. adds it to the cvs
     repository) and you happen to have a directory in your source farm by
     the same name, when you do your cvs update -d it SILENTLY does
     *nothing* to that directory.  At least, I think it was silent;
     certainly, it did *not* abort my cvs update, as it would have if the
     same thing had happened with a file instead of a directory.

109. I had gotten pieces of the sys directory in the past but not a
     complete tree.  I just did something like:

        cvs get *

     Where sys was in * and got the message

        cvs get: Executing 'sys/tools/make_links sys'
        sh: sys/tools/make_links: not found

     I suspect this is because I didn't have the file in question,
     but I do not understand how I could fool it into getting an
     error.  I think a later cvs get sys seemed to work so perhaps
     something is amiss in handling multiple arguments to cvs get?

112. When merging in changes (Glist) and the file ends up exactly as the
     RCS revision, an "M" is displayed as the "cvs update" output.  This
     should really just be a "U".  Just an optimization.

113. The "cvs update" command should tee its output to a log file in ".".

114. I wanted to check in my metapreen code tonight, which I had put into
     a new file called preen.c.  So, recalling your excellent instructions,
     I typed "cvs add preen.c".  However, cvs complained that there was
     already a preen.c in /master/etc/fsck/Attic and therefore it wouldn't
     take mine.  Now what?

115. I still think "cvs modules" is a good idea.
   Since everything else is inside cvs, "mkmodules" should be in there too:

   Add a "modules" (synonym "mod") command directly in cvs.
   ("checkout -c" is not really intuitive.  I'd move it into "mod -s".)

   "mod"		Print database as typed. (line count as record id?)
   "mod -s"		Print the sorted database (as "checkout -c" does now)
   "mod -m"		Internal replacement for "mkmodules" command.
   "mod module ..."	Print the raw dbm record for the named modules
   "mod -p module ..."	Print relative filenames contained in modules.(no ",v")
   "mod -l module ..."	Prints more info about relative filenames ("ls -l"?)
   "mod -f file ..."	Tells you what module(s) the filenames are in.

116. The first thing import did was to complain about a missing CVSROOT.adm.
     How about having "import()" copy some "CVSROOT.adm/{loginfo,modules}"
     templates into place if it discovers none pointed to by $CVSROOT?  As it
     stands, one has to hand-craft them.  It would be real nice to have it
     happen automatically.
     [[ I hope to add a "cvsinit" command to the installation instructions ]]

119. Consider an option to have import checkout the RCS or SCCS files
     if necessary.

122. If Name_Repository fails, it currently causes CVS to die completely.  It
     should instead return NULL and have the caller do something reasonable.

123. Add a flag to import to not build vendor branches for local code.

124. Anyway, I thought you might want to add something like the following
     to the cvs and mkmodules man pages:

     BUGS
 	The sum of the sizes of a module key and its contents are
 	limited.  See ndbm(3).

126. Do an analysis to see if CVS is forgetting to close file descriptors.
     Especially when committing many files (more than the open file limit
     for the particular UNIX).

127. Look at *info files; they should all be quiet if the files are not
     there.  Should be able to point at a RCS directory and go.

128. When I tag a file, the message tells me that I'm tagging a directory.

129. Something strange seems to have happened here.  When I check this out,
     the update lines (U CFTS/...) seem to report a bogus leading CFTS
     (e.g. U CFTS/Medusa_TS/...) when the later files are checked out.

     The directory structure doesn't seem to be botched, just the
     messages.  I don't recall seeing this before.

130. cvs diff with no -r arguments does not need to look up the current RCS
     version number since it only cares about what's in the Entries file.
     This should make it much faster.

     It should ParseEntries itself and access the entries list much like
     Version_TS does (sticky tags and sticky options may need to be
     supported here as well).  Then it should only diff the things that
     have the wrong time stamp (the ones that look modified).

134. Make a statement about using hard NFS mounts to your source
     repository.  Look into checking NULL fgets() returns with ferror() to
     see if an error had occurred.

135. The email CVS sends with each checkin, should include the version
     number of each file it is checking in.
     [[ Sort of solved by contrib/log.pl, which does a good job of this ]]

136. Is it possible to specify a command to be run on each file when it is
     checked out and another command to be run before it is checked in?
     My idea of how this feature would be used:
	On checkout:
		run indent with user's preferred style
	On checkin:
		run indent with space-saving, style-free for checkin

137. Some sites might want CVS to fsync() the RCS ,v file to protect
     against nasty hardware errors.  There is a slight performance hit with
     doing so, though, so it should be configurable in the .cvsrc file.
     Also, along with this, we should look at the places where CVS itself
     could be a little more synchronous so as not to lose data.
     [[ I've done some of this, but it could use much more ]]

138. Some people have suggested that CVS use a VPATH-like environment
     variable to limit the amount of sources that need to be duplicated for
     sites with giant source trees and no disk space.

139. murf@dingus.sps.mot.com (Steve Murphy) suggests adding a mode where
     CVS can work across e-mail to a single repository located at some
     "known" mail address.  The update/commit operations would work through
     email aliases, causing them to be slow, but would work nonetheless.
     This could allow for very cheap remote development sites.
     [[ We may get to TCP connections over the Internet for the next
     release, but probably won't do an e-mail linkup right away ]]

141. Import should accept modules as its directory argument.

143. Update the documentation to show that the source repository is
     something far away from the files that you work on.

144. Have cvs checkout look for the environment variable CVSPREFIX
     (or CVSMODPREFIX or some such).  If it's set, then when looking
     up an alias in the modules database, first look it up with the
     value of CVSPREFIX attached, and then look for the alias itself.
     This would be useful when you have several projects in a single
     repository.  You could have aliases abc_src and xyz_src and
     tell people working on project abc to put "setenv CVSPREFIX abc_"
     in their .cshrc file (or equivalent for other shells).
     Then they could do "cvs co src" to get a copy of their src
     directory, not xyz's.  (This should create a directory called
     src, not abc_src.)

145. After you create revision 1.1.1.1 in the previous scenario, if
     you do "cvs update -r1 filename" you get revision 1.1, not
     1.1.1.1.  It would be nice to get the later revision.  Again,
     this restriction comes from RCS and is probably hard to
     change in CVS.  Sigh.

     |"cvs update -r1 filename" does not tell RCS to follow any branches.  CVS
     |tries to be consistent with RCS in this fashion, so I would not change
     |this.  Within CVS we do have the flexibility of extending things, like
     |making a revision of the form "-r1HEAD" find the most recent revision
     |(branch or not) with a "1." prefix in the RCS file.  This would get what
     |you want maybe.
      
     This would be very useful.  Though I would prefer an option
     such as "-v1" rather than "-r1HEAD".  This option might be
     used quite often.

146. The merging of files should be controlled via a hook so that programs
     other than "rcsmerge" can be used, like Sun's filemerge or emacs's
     emerge.el.

148. It would be nice if cvs import (and perhaps commit when the rcs file
     is created) would set the comment leader automagically to the prefix
     string of $Log entry, if some option is given.  For example, if a file
     has a line `%*&# $Log...'  the comment leader would be set to `%*&# '.
     It would help a lot for unknown files with unknown suffix, and if the
     comment leader is not standard.  Perhaps for cvs 1.4.

149. On Sun, 2 Feb 92 22:01:38 EST, rouilj@dl5000.bc.edu (John P. Rouillard)
     said:
     Maybe there should be an option to cvs admin that allows a user to
     change the Repository file with some degree of error checking?
     Something like "cvs admin reposmv /old/path /new/pretty/path".  Before
     it does the replace it check to see that the files
     /new/pretty/path/<dir>/<files> exist.

150. I have a customer request for a way to specify log message per
     file, non-interactively before the commit, such that a single, fully
     recursive commit prompts for one commit message, and concatenates the
     per file messages for each file.  In short, one commit, one editor
     session, log messages allowed to vary across files within the commit.
     Also, the per file messages should be allowed to be written when the
     files are changed, which may predate the commit considerably.

     A new command seems appropriate for this.  The state can be saved in the
     CVS directory.  I.e.,
 
        % cvs msg foo.c
        Enter log message for foo.c
        >> fixed an uninitialized variable
        >> ^D

     The text is saved as CVS/foo.c,m (or some such name) and commit is
     modified to append (prepend?) the text (if found) to the log message
     specified at commit time.  Easy enough.

151. Also, is there a flag I am missing that allows replacing Ulrtx_Build
     by Ultrix_build?  I.E. I would like a tag replacement to be a one step
     operation rather than a two step "cvs rtag -r Ulrtx_Build Ultrix_Build"
     followed by "cvs trag -d Ulrtx_Build"

152. The "cvs -n" option does not work as one would expect for all the
     commands.  In particular, for "commit" and "import", where one would
     also like to see what it would do, without actually doing anything.

153. There should be some command (maybe I just haven't figured
     out which one...) to import a source directory which is already
     RCS-administered without losing all prior RCS gathered data.  Thus, it
     would have to examine the RCS files and choose a starting version and
     branch higher than previous ones used.

154. When committing the modules file, a pre-commit check should be done to
     verify the validity of the new modules file before allowing it to be
     committed.  This could easily be done by adding an option to mkmodules
     to perform the verification.

155. The options for "cvs history" are mutually exclusive, even though
     useful queries can be done if they are not, as in specifying both a
     module and a tag.  A workaround is to specify the module, then run the
     output through grep to only display lines that begin with T, which are
     tag lines.

156. Also, how hard would it be to allow continuation lines in the
     {commit,rcs,log}info files? It would probably be useful with all of
     the various flags that are now available, or if somebody has a lot of
     files to put into a module.

157. The "cvs release" command does not understand about module names with
     the same flexibility that the "checkout" and "rdiff" commands do.
     It should, though, since it's confusing right now.

158. If I do a recursive commit and find that the same RCS file is checked
     out (and modified!) in two different places within my checked-out
     files (but within the realm of a single "commit"), CVS will commit the
     first change, then overwrite that change with the second change.  We
     should catch this (typically unusual) case and issue an appropriate
     diagnostic and die.

159. On "update", when a merge is done, CVS should remember that your file
     was merged into and should keep reminding you of this fact until you
     actually look at the file (change its access time).  Once you do this,
     it should go back to being a normal, unmodified file.  This way, after
     a big update, you can run update again to see which files just got
     merged and may need attention.

160. The checks that the commit command does should be extended to make
     sure that the revision that we will lock is not already locked by
     someone else.  Maybe it should also lock the new revision if the old
     revision was already locked by the user as well, thus moving the lock
     forward after the commit.

161. The date parser included with CVS (lib/getdate.y) does not support
     such RCS-supported dates as "1992/03/07".  It probably should.

162. We have had a number of cases where some idiot does a "cd" into $CVSROOT
     and tries to run checkout.  I suggest you make it impossible for someone
     to check out anything directly into $CVSROOT.  This works (though there
     is no error checking):
 
	getwd(curdir);
	chdir(getenv("CVSROOT"));
	getwd(cvsrootdir);
	strcat(cvsrootdir, "/");
	chdir(curdir);
 
 	if (!strncmp (curdir, cvsrootdir, strlen(cvsrootdir))) {
		abort with a nasty message about writing into the repository.
	}

     (In other words, if the real path where $CVSROOT is stored is a parent of
     the real pathname of your current directory, die horribly.)

163. The rtag/tag commands should have an option that removes the specified
     tag from any file that is in the attic.  This allows one to re-use a
     tag (like "Mon", "Tue", ...) all the time and still have it tag the
     real main-line code.

164. The rcsinfo file should be able to expand environment variables to
     find the pathname to the template file.  Perhaps it should just
     popen("cat <line>"); and read the resulting output, to let the shell
     do the dirty work.