aecvsserver(1)															    aecvsserver(1)

NAME

	aecvsserver - serve CVS client protocol against Aegis projects

SYNOPSIS

	aecvsserver server
	aecvsserver pserver
	aecvsserver -VERSion

DESCRIPTION

	The aecvsserver command is used to serve the CVS client protocol.  The repository, of course, is stored within Aegis.

	The server works by retrieving file contents from locations within Aegis change sets and repositories.	When necessary, appropriate
	aegis(1) commands are executed by the server to fulfill the requests.

	This code is still experimental.  At the present time only a limited number of CVS commands are understood.  If you would like to extend
	this code, contributions are welcome.  The following commands are thought to work at this time: add, admin, checkout, commit, init,
	remove, update.

   server
	To use the server, you will need to set the following environment variables:
		CVSROOT=:ext:hostname/aegis
		CVS_RSH=ssh
		CVS_SERVER=aecvsserver

   pserver
	It is also possible to use aecvsserver as a cvs pserver, with all the usual caveats about how insecure this access method is, because it
	transmits the password almost in the clear.  The root and modules are as above.

MODULES

	The CVS concept of modules is mapped onto Aegis concept of projects and changes.  The special CVSROOT administrative module is simulated.

   Projects as Modules
	Each Aegis project appears to the CVS client as a module; the module's name is the same as the Aegis project's name.  This type of module
	isn't immediately useful except for the cvs export command, or to perform a read-only cvs checkout command.

	You can't commit to a project-named module.  This because Aegis requires all operations which would change the repository to be performed
	through a change set.

	It is theoretically possible to code aecvsserver to create a change (via aenc(1) and aedb(1) commands), then add the necessary files (via
	aenf(1) and aecp(1) commands), then build (via the aeb(1) command), then test (via the aet(1) command), and finally to end development of
	the change (via the aede(1) command).  As the CVS protocol documentation says
		"The protocol makes it possible for updates to be atomic with respect to checkins; that is, if someone commits changes to several
		files in one cvs command, then an update by someone else would either get all the changes, or none of them.  The current cvs
		server can't do this, but that isn't the protocol's fault."
	This code is yet to be written.  Contributions welcome.

	The protocol, however, doesn't make it particularly easy, either.  The semantics of the Modify request change depending on whether it is
	followed by the commit request or the update request.

   Changes as Modules
	Each Aegis change set also appears to the CVS client as a module; it's name is project.Cnumber.  All cvs add commands, cvs remove com-
	mands, cvs update commands and cvs commit commands are performed against the change set, not directly to the baseline.	It is necessary
	for the change set to already exist, and once you have run the cvs commit command, it will the be necessary to use the aede(1) command and
	the rest of the usual Aegis process.

	Once a change is no longer in the being developed state, it cannot be changed via aecvsserver(1) and you will need to create a new Aegis
	change set, and then cvs checkout a new client-side work area.

	Please note: if you are experimenting with the interface via cvs -d :fork:/aegis or similar, the work area you create must be outside the
	Aegis change set's development directory.

   CVSROOT
	The CVSROOT module's contents are synthesized from Aegis meta-data.  You can't add or modify files in this module; you need to administer
	Aegis directly with aegis(1) commands.

EXIT STATUS

	The aecvsserver command will exit with a status of 1 on any error.  The aecvsserver command will only exit with a status of 0 if there are
	no errors.

ENVIRONMENT VARIABLES

	See aegis(1) for a list of environment variables which may affect this command.  See aepconf(5) for the project configuration file's
	project_specific field for how to set environment variables for all commands executed by Aegis.

COPYRIGHT

	aecvsserver version 4.24.3.D001
	Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Peter
	Miller

	The aecvsserver program comes with ABSOLUTELY NO WARRANTY; for details use the 'aecvsserver -VERSion License' command.	This is free soft-
	ware and you are welcome to redistribute it under certain conditions; for details use the 'aecvsserver -VERSion License' command.

AUTHOR

	Peter Miller   E-Mail:	 millerp@canb.auug.org.au
	//*		  WWW:	 http://www.canb.auug.org.au/~millerp/

Reference Manual						       Aegis							    aecvsserver(1)