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3. Setting up CVS

First you need to install the CVS package. On Redhat Linux use:


cd /mnt/cdrom/Redhat/RPMS
rpm -i rcs*.rpm
rpm -i cvs*.rpm
To see the list of files installed do -
rpm -qpl cvs*.rpm | less

and browse the output using j,k, CTRL+f, CTRL+D, CTRL+B, CTRL+U or using arrow keys, page up/down keys. See 'man less'.

On other flavors of Unix, you may need to download the RCS and CVS tar balls and follow the README, INSTALL files to setup CVS. Visit http://www.cyclic.com and http://www.loria.fr/~molli/cvs-index.html

3.1 Environment variables

The following environment variables need to be setup in /etc/profile - default values required for all users. If not set in /etc/profile, then you should add these to your local profile file  /.bash_profile.


export EDITOR=/bin/vi
export CVSROOT=/home/cvsroot
export CVSREAD=yes

Create a directory to store the source code repository and give read, write access to Unix group/user. Also make sure that the directory name of CVSROOT does not contain any blank spaces. For example CVSROOT should not be like '/home/my rootcvs'.


bash$ su - root
bash# export CVSROOT=/home/cvsroot
bash# groupadd --help
bash# groupadd cvs
bash# useradd --help
bash# useradd -g cvs -d /home/cvsroot cvs

bash# ls -ld $CVSROOT   ... (you should see the listing)
bash# chmod o-rwx $CVSROOT
bash# chmod ug+rwx $CVSROOT

#To initialize the CVS repository and to put in source code files do:
bash# cvs init

# Add the unix users to the cvs group. Create supplementary groups for users.
# Note that you MUST not put any blank spaces after comma seperating the
# group names in -G option.
# In example below user tom belongs to groups cvs, users and staff and user
# johnson belongs to group cvs only.
bash# usermod --help
bash# usermod -G cvs some_unix_username
bash# usermod -G cvs,users,staff tom
bash# usermod -G cvs,users,staroffice billclinton
bash# usermod -G cvs johnson
bash# exit    .... (logout of root superuser mode)

# Login as a user and import files into cvs....
bash$ su - billclinton
bash$ export EDITOR=/bin/vi
bash$ export CVSROOT=/home/cvsroot
bash$ export CVSREAD=yes

# Change directory is a must
bash$ cd $HOME/my_source_code_dir

# Must give vendor tag and revision tag
cvs import my_source_code_dir Vendor1_0 Rev1_0  

# For example I did:
bash$ cd $HOME/foobar
bash$ cvs import foobar Vendor1_0 Rev1_0

# A sample testing and verification:
bash$ cd $HOME/foobar
bash$ cvs checkout myfoo.java

TROUBLESHOOTING: When doing checkout it says module is unknown. It is a common mistake not to change directory while doing cvs import. You MUST change directory to the source-code-directory and then do cvs import. For example:


bash$ cd $HOME/foobardir
bash$ cvs import foobardir Vendor1_0 Rev1_0

3.2 Migrate RCS to CVS

To migrate the existing RCS files to CVS, use the following script. Make sure that you installed the Korn shell package pdksh*.rpm from the Linux contrib cdrom.

NOTE : Get the Korn shell /bin/ksh by installing pdksh*.rpm from the Linux contrib cdrom


#!/bin/ksh

#############################################################
# Program to Migrate the existing source code in RCS to CVS 
#
# Needs the korn shell RPM package  pdksh*.rpm from Linux 
# contrib cdrom
#############################################################

#
# rcs2cvs - convert source tree from RCS to CVS
#

# project to convert
PROJECT='project'

# current RCS root
RCSROOT="$HOME/rcs"

if cd "$RCSROOT/$PROJECT"
then
        cd "$RCSROOT"
else
        echo >&2 "`basename "$0"`: can't change to RCS directory '$RCSROOT/$PROJECT'."
        exit 1
fi

# current CVS root
CVSROOT="$HOME/cvs"

# create new CVS directory for project 'project'
if mkdir "$CVSROOT/$PROJECT"
then
        :
else
        echo >&2 "`basename "$0"`: can't create CVS directory '$CVSROOT/$PROJECT'."
        exit 2
fi

# create CVS project tree from RCS tree
find "$PROJECT" -type d -name RCS -print |
while read RCS
do
        CVS="`dirname "$RCS"`"
        (if cd "$RCS"
        then
#               if find . -type f -name '*,v' -print | cpio -pdmv "$CVSROOT/$CVS"
                if find . -type f -print | cpio -pdmv "$CVSROOT/$CVS"
                then
                        :
                else
                        echo >&2 "`basename "$0"`: can't convert RCS subdirectory '$RCSROOT/$RCS' to CVS subdirectory '$CVSROOT/$CVS'."
                fi
        else
                echo >&2 "`basename "$0"`: can't change to RCS subdirectory '$RCSROOT/$RCS'."
        fi)
done

Now the RCS is migrated to CVS as 'project'. You can start using the CVS commands on module 'project'.
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