Subversion (svn)

• Subversion is a popular open-source version control tool. 

Version Control System (VCS) 

•  VCS is a software that helps software developers to work together and maintain a complete history of their work.

• Goals of version control system 
• Allow developers to work simultaneously
• Do not overwrite each other's changes.
• Maintain history of every version of everything.

• A VCS is divided into two categories
• Centralized Version Control System (CVCS)
• Distributed Version Control System (DVCS)

• Subversion falls under CVCS, meaning that it uses central server to store all files and enables team collaboration.

SVN Installation on CentOS 6/ RHEL 6/ Fedora

    Run the following commands as 'root' or,

#sudo yum install subversion mod_dav_svn

                    OR

#sudo wget http://apache.cs.utah.edu/subversion/subversion-1.6.11.tar.gz  % downloading subversion from source

#sudo yum install mod_dav_svn                      %installing                   

#cd /var/www/                                                   %changing directory

#sudo tar -xvzf subversion-1.6.11.tar.gz        %extracting

#sudo mv subversion-1.6.11 subversion        %renaming

#sudo vim /etc/httpd/conf.d/subversion.conf   %opening configuration file for editing

LoadModule dav_svn_module     modules/mod_dav_svn.so

LoadModule authz_svn_module   modules/mod_authz_svn.so

<Location /svn>

   DAV svn

   SVNParentPath /var/www/svn

   # Limit write permission to list of valid users.

   <LimitExcept GET PROPFIND OPTIONS REPORT>

      # Require SSL connection for password protection.

      # SSLRequireSSL

      AuthType Basic

      AuthName "Subversion repositories"

      AuthUserFile /etc/svn-auth-users

      Require valid-user

   </LimitExcept>

</Location>

User Setup

%Creating user tonym

#htpasswd -cm /etc/svn-auth-users tonym

New password:

Re-type new password:

Adding password for user tonym

Note: Use exactly same file and path name as used on subversion.conf file. This example use /etc/svn-auth-users file.

  

Create and configure svn repository 

#mkdir /var/www/svn

#cd /var/www/svn

#svnadmin create testrepo

#chown -R apache.apache testrepo

%% If you have SELinux enabled (you can check it with "sestatus" command)

 %% 

then change SELinux security context with chcon command %%

#chcon -R -t httpd_sys_content_t /var/www/svn/testrepo

%%Following enables commits over http%%

#chcon -R -t httpd_sys_rw_content_t /var/www/svn/testrepo

Restart Apache

#sudo service httpd restart

Configure Repository

To disable anonymous access and enable access control add following rows to /var/www/svn/testrepo/conf/svnserve.conf file:

%% Disable anonymous access %%

anon-access = none

%% Enable access control %%

authz-db = authz

Create trunk,tags & branches directory structure under the testrepo repository

#mkdir -p /tmp/svn-structure-template/ {trunk,branches,tags}

Then import template to project repository using “svn import” command:

#svn import -m 'Initial import' /tmp/svn-structure-template/ http://localhost/svn/testrepo/

Adding         /tmp/svn-structure-template/trunk

Adding         /tmp/svn-structure-template/branches

Adding         /tmp/svn-structure-template/tags

Committed revision 1.

Check results on browser and see testrepo revision 1:

http://myserverip/svn/testrepo/