May 30, 2010

How to use Subversion?

In this article, i will talk about installing and using Subversion on Ubuntu 10.04 LTS machine.

What is Subversion?
In brief Subversion is a kind of version tracking and common software development software.
You can easily develop your software projects by creating revisions using Subversion.

Now let’s install Subversion on our GNU/Linux machine, Ubuntu 10.04 LTS.

1-) Installing Subversion packages,

   bolat@bolat-vaio:~$ sudo apt-get install subversion libapache2-svn

2-) Creating subversion group and adding users,

   a-  Choose System > Administration > Users and Groups from your Ubuntu menu.
   b-  Select the Group tab.
   c-  Click the 'Add Group' button
   d-  Name the group 'subversion'
   e-  Add yourself (for me username: bolat) and www-data (the Apache user) as users to this group
        In order to see your user name and subversion group,
        - Start gconf settings editor: Alt+F2 gconf-editor Enter.
        - In the tree, locate /apps/gnome-system-tools/users.
        - Select the "showall" check-box. 

3- Creating Subversion folder.

   bolat@bolat-vaio:~$ sudo mkdir /var/svn
   bolat@bolat-vaio:~$ cd /var/svn
   bolat@bolat-vaio:/var/svn $ sudo mkdir projects

4- Creating repository in the Subversion folder.

   bolat@bolat-vaio:~$ sudo svnadmin create /var/svn/projects

5- Configuring file permissions,

   bolat@bolat-vaio:~$ cd /var/svn
   bolat@bolat-vaio:/var/svn $ sudo chown -R www-data:subversion projects
   bolat@bolat-vaio:/var/svn $ sudo chmod -R g+rws projects

6- Importing projects into Subverion repository,

   bolat@bolat-vaio:~$ svn import /home/bolat/embedded/lpc2368projects file:///var/svn/projects

7- Configuring apache web server for WebDAV access, (You can easily access the subversion repositories through http, using WebDAV plugin)

   bolat@bolat-vaio:~$ sudo nano /etc/apache2/mods-available/dav_svn.conf

then add these lines below,

  <Location /svn/projects>
     DAV svn
     SVNPath /var/svn/projects
     AuthType Basic
     AuthName "myproject subversion repository"
     AuthUserFile /etc/subversion/passwd
        Require valid-user

or in order to see all repositories at once,

  <Location /svn>
     DAV svn
     SVNParentPath /var/svn
     SVNListParentPath On
     AuthType Basic
     AuthName "Subversion Repository"
     AuthUserFile /etc/subversion/passwd
        Require valid-user


   bolat@bolat-vaio:~$ sudo /etc/init.d/apache2 restart

8- Adding users into authenticating WebDAV access,

   bolat@bolat-vaio:~$ sudo htpasswd -c /etc/subversion/passwd bolatsvnuser

not: must be used -c parameter, in order to create first user.

   bolat@bolat-vaio:~$ cat /etc/subversion/passwd

you can be sure that user added.

9- Trying Subversion repository,

   bolat@bolat-vaio:~$ svn co http://hostname/svn/projects projects --username bolatsvnuser

not: if you use for local machine, host name must be localhost instead of hostname.

10- Accessing methods Subversion repository,
Basic subversion access methods,

   - file://    Direct repository access (for local disk)
   - http://    Access via WebDAV protocol to Subversion-aware Apache2 web server
   - svn://     Access via custom protocol to an svnserve server
   - svn+ssh:// Same as svn://, but through an SSH tunnel

Direct access to Subversion repository from local,

   bolat@bolat-vaio:~$ svn co file:///var/projects

not: be careful about three slash,
   bolat@bolat-vaio:~$ svn co file://localhost/var/projects

Access to the repository via http:// WebDAV

   bolat@bolat-vaio:~$ svn co http://hostname/projects projects

Access to the repository via custom protocol svnserve server,

   bolat@bolat-vaio:~$ svn co svn://hostname/projects projects

Access to the repository via custom protocol svnserve through SSH tunnel,

   bolat@bolat-vaio:~$ svn co svn+ssh://hostname/projects projects

If you want to configure user access to Subversion repository,

   bolat@bolat-vaio:~$sudo nano /var/svn/projects/conf/svnserve.conf 

then edit

# anon-access = read
# auth-access = write

section to allow anonymous and/or authoritative access.

If you would like to use proprietary svn access to Subversion repository, you must set svnserv as,

   bolat@bolat-vaio:~$ svnserve -d --foreground -r /path/to/repos
   # -d -- daemon mode
   # --foreground -- run in foreground (useful for debugging)
   # -r -- root of directory to serve

For more usage details, please refer to:

$ svnserve --help

Now we installed Subversion, imported a project, and configured Subversion access, let’s check it out,

   bolat@bolat-vaio:~$ svn co http://localhost/svn/projects -username bolatsvnuser
   bolat@bolat-vaio:~$ cd projects
   bolat@bolat-vaio:~/projects $ svn update; svn log


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