# XWiki

XWiki is an open-source enterprise-ready wiki written in Java, with a focus on extensibility. For more information, see the Wikipedia article, and the XWiki Homepage.

You may also be interested in Foswiki, which caters to similar needs, but is written in Perl.

## Installation

Feel free to follow along on the XWiki Installation Guide. These instructions assume you will be using Tomcat and PostgreSQL. It should not be too difficult to apply these guidelines to other combinations.

- Install PostgreSQL.
- For easier PostgreSQL administration, install phpPgAdmin.
- Install Tomcat 7. (Do not forget `tomcat-native`.)
- Download the XWiki WAR file.
- Rename the WAR file to `xwiki`.
- Move the WAR file into the `/var/lib/tomcat7/webapps` directory.
- Tomcat should automatically extract the WAR file. If not, restart Tomcat.
- At this point, you may find that a `data` directory has appeared in `/var/lib/tomcat7/webapps`. Delete it.
- As root:

    # cd /var/lib/tomcat7
    # mkdir data
    # chown tomcat:tomcat data

- Inside the `/var/lib/tomcat7/webapps/xwiki/WEB-INF` directory:
  - Open the `xwiki.cfg` file and alter the `xwiki.work.dir` field to read `/var/lib/tomcat7/data/xwiki`.
  - Open the `xwiki.properties` file and alter the `container.persistentDirectory` field to read `/var/lib/tomcat7/data/xwiki`.
  - Open the `hibernate.cfg.xml` file and:
    - Comment-out the section entitled "Configuration for the default database".
    - Uncomment the section entitled "PostgreSQL Configuration".
    - Modify the database name (in `connection.url`), username, and password as desired.
- Create a role and database in PostgreSQL to match the hibernate configuration.
- Install postgresql-jdbcAUR from the Arch User Repository.
- As root:

    # cd /usr/share/java/tomcat7
    # ln -s /usr/share/java/postgresql-jdbc/postgresql-jdbc4.jar

- Restart Tomcat.
- Launch the XWiki application by clicking on `/xwiki` in Tomcat Manager.
- Download the XAR file for XWiki and upload it to populate the empty Wiki.

## Nginx Proxy Configuration

I found that instructing nginx to proxy to `http://localhost:8080/xwiki/` did not work: the generated URLs were incorrect. Contrary to what is indicated in the XWiki documentation, I could not make the URLs correct through the use of HTTP headers.

The only solution I'm aware of so far is to create a new `Host` element in Tomcat's `server.xml` file:

- Duplicate the existing `Host` element and alter the `name` attribute to read `xwiki`.
- Alter the `appBase` attribute to read `/var/lib/tomcat7/webapps-xwiki`.
- Move the `xwiki` application from `/var/lib/tomcat7/webapps/xwiki` to `/var/lib/tomcat7/webapps-xwiki/ROOT`.
- Restart Tomcat
- Add `xwiki` as an alias to localhost in `/etc/hosts` (add it to the end of the 127.0.0.1 line).
- Instruct Nginx to proxy to `http://xwiki:8080/` instead.

Category:

- Web server