UseCVS < Computing

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---+++ Introduction

A CVS repository is available for personal and workgroup use on the MSUHEP Linux Cluster.  The location is /opt/cvsroot. Local and remote access is allowed for cluster users.  This article provides user instructions.

Projects are created as directories below =/opt/cvsroot=.  The list of users who can write to the project is controlled by normal UNIX file permissions.  Normally a group will be created on the systems that lists all users for a given project.  Email rockwell@pa.msu.edu to have this configured for a new project.

Remote access is supported for cluster users via SSH.  There is no anonymous access.

---++++ Documentation Resources
 
   * https://www.cvshome.org/
   * /usr/share/doc/cvs-[version] documentation included with cvs
   * cvs man pages - "man cvs"
   * cvsdocs directory in the cvs repository - see below for an example of checking it out
 
---++++ Shell Setup
 
For local access (when logged into a machine on the cluster), set your CVSROOT environment variable to /opt/cvsroot. 

In bash shell:

<verbatim>
export CVSROOT=/opt/cvsroot
</verbatim>

In tcsh shell:

<verbatim>
setenv CVSROOT /opt/cvsroot
</verbatim>
 
For remote access via ssh, set CVSROOT and CVS_RSH environment variables as follows: 

In bash shell:

<verbatim>
export CVSROOT=username@hep.pa.msu.edu:/opt/cvsroot
export CVS_RSH=ssh
</verbatim>

In tcsh shell:

<verbatim>
setenv CVSROOT username@hep.pa.msu.edu:/opt/cvsroot
setenv CVS_RSH ssh
</verbatim>

---++++ Examples
 
*Checkout the documentation*
 
Some general documentation and local usage notes are in the cvsdocs directory. To check them out, do the environment setup above, then give the command: 

<verbatim>
cvs co cvsdocs
</verbatim>
 
A directory cvsdocs will be created below your current directory. 

*Import a Directory*
 
This process is used for the initial creation and population of a directory in the repository. First do the environment setup, then change directory to your working directory, then use the cvs import command, specifying a useful message or comment, the new repository location to create, the vendor (your name) and a string to be used as the tag. 

<verbatim>
cd working_dir
cvs import -m "message/comment text" onetop/st_nlo_paper cao start
</verbatim>
 
*Checkout*
 
This will create the diretory onetop/st_nlo_paper in your current directory. 

<veratim>
cvs co onetop/st_nlo_paper
</verbatim>
 
-- Main.TomRockwell - 23 Apr 2007

Topic revision: r2 - 23 Apr 2007, TomRockwell

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