root/tags/rel0_52/INSTALL

OpenGuides installation instructions
====================================


If while following the instructions below or while trying to use your
OpenGuides install you see an error that you don't understand, please
consult the TROUBLESHOOTING file.

For details about installing multiple OpenGuides sites on a single
server, see further down this file.

* Basic installation

Unpack the distribution (using for example 'tar' or 'WinZip'), and set
your working directory to be the top level of the distribution.

If you have an existing "wiki.conf" configuration file and you wish
to keep using the values in that, copy it to this directory.

Now execute the following commands:

perl Build.PL
perl Build
perl Build test
perl Build install

The very first of these commands asks a number of questions regarding
the installation.


  "Skip OpenGuides configuration?"

Answer "n" to this question unless you really know what you're doing.
It's mainly there for developers.


  "What type of database do you want the site to run on?"

Answer "postgres", "mysql", or "sqlite".


  "What's the name of the database that this site runs on?"
  "...the database user that can access that database?"
  "...the password that they use to access the database?"

You should create (or ask your ISP/sysadmin to create) a database
specifically for the use of OpenGuides.  If you have more than one
OpenGuides installation, for example if you run guides for more than
one city, each installation will need its own database.


  "...the machine that the database is hosted on? (blank if local"

If the database is running on a local machine with username/password
authentication then just press RETURN to skip this question.  If it
is running on a local machine with IDENT authentication then you may
need to answer "localhost" to this question.  If it is running on a
remote machine then enter the full hostname of that machine.


  "What do you want the script to be called?"

The default is for the main script to be called "wiki.cgi", but
you may prefer to name it after your city - "leeds-guide.cgi" for
example.  Note that your webserver may be configured to only allow
execution of scripts ending in, for example, ".cgi"


  "What directory should I install it in?"

You need to pick a directory for the OpenGuides software to be
installed in.  This must be one known to the webserver as containing
CGI scripts.  You will need to have write permission on this directory
when you come to run "perl Build install"; unless this is a private
directory belonging to you then this might require an 'su' or 'sudo'
to root under Unix.


  "What directory should I install the templates in?" 
  "Where should I look for custom templates?"

Normally these will be in the install directory, but they can be anywhere.
Custom templates are intended to be user-modified, so you might want to
put them somewhere in /etc.


  "What URL does the install directory map to?"

Give the full address needed to access the installation directory with
a web browser - for example http://london.openguides.org/cgi-bin/


  "Do you want me to munge a custom lib path into the scripts?"

If you have installed some or all of the required Perl modules (or indeed
the OpenGuides modules themselves) into a private directory, you will
need to tell the scripts where to find these modules.  Enter the paths
to search here just as you would enter them in a 'use lib qw( ... );'
in a Perl script.


  "Do you want to use Plucene for searching?"

From version 0.39 of OpenGuides, you have the option of using Plucene
to index your wiki instead of Search::InvertedIndex.  If you answer
yes to this question, you will need to make sure you have installed
both Plucene, and CGI::Wiki version 0.56 or later.

If you are changing to Plucene from Search::InvertedIndex, you will
need to do two things:
    - either delete your old indexes (they're just files in the index
      directory) or use a different index directory
    - reindex your entire wiki (see reindex.pl in the examples/
      directory of this distribution)


  "What directory can I use to store indexes in for searching?"

You need a directory to store files used as indexes for the site. The
user that your script will run as will need write permission on this
directory.  Under some webserver configurations this might be a
dedicated user - 'nobody' or 'www-data' for example, but for many
multi-user systems this will just be yourself.


  "Do you want to enable page deletion?"
  "Please specify a password for the site admin."

The default is to disable page deletion.  If you choose to enable the
page deletion mechanism then you will need to add a password to your
wiki.conf by answering the question above or manually using a line such as
  admin_pass = putyourpasswordhere
Users who know this password will be able to delete unwanted pages -
along with all their history - from your wiki.
*** USE WITH CAUTION.  DELETED PAGES CANNOT BE RECOVERED. ***


  "What's the URL of the site's stylesheet?"

Supplying an answer to this question is optional.  There are example
stylesheets in the examples/ directory - note that these will not be 
automatically installed.


  "What's the wiki called?"

This is a title which will appear at the top of every page.  If you have
more than one OpenGuides installation at the same site then each should
have a unique name, since this name is used to manage user preferences.


  "Do you want the navigation bar included on the home page?"

Answer "y" or "n".


  "What should the home page of the wiki be called?"
  "How would you describe the wiki?"

Self-explanatory.


  "What city is the wiki based in?"
  "What country is the wiki based in?"

If the wiki will not be city or country specific you can leave either or
both of these blank.


  "Contact email address for the wiki admin?"

Self explanatory.


  "What language will the site be in? (Please give an ISO language code.)"

eg "en" for English, "it" for Italian.
See http://ftp.ics.uci.edu/pub/ietf/http/related/iso639.txt


  "What's the name of the node or page to use for the text formatting
   rules link?"
  "What URL do you want to use for the text formatting rules"

From 0.19, OpenGuides allows users to choose whether or not to have a
permanent link to the text formatting rules node or page in their navbar.
You need to put the name of that node or URL in here for it to work, though.
You might want to call the node "Text Formatting Examples",
"Text Formatting Rules", "House Style" or whatever.

Note that these the latter question will override the former, so if you
want to use a local node make sure to leave the latter blank.

  "Make node titles link to node backlinks (C2 style)?"

This refers to turning titles into links which bring up a list of referring
pages. This was the convention with older wikis, but is not intuitive.

  "Do you have a Google Maps API key to use with this guide?"

If you want Google Maps integration, you need to register with Google to get
an API key. Visit http://www.google.com/apis/maps/signup.html and follow the
instructions. Paste the great long string into the console window where you
are installing. See README.GMAPS for more information.

  "What is the longitude of the centre point of a map to draw for your guide?"
  "What is the latitude of the centre point of a map to draw for your guide?"

It's probably a good idea to pick some notionally central point for your 
guide. For example, Carfax for Oxford, Charing Cross for London.

  "What default zoom level shall we use for Google Maps?"
  "What default zoom level shall we use for Google Maps in the search results?"

The defaults are probably appropriate in most cases.

  "Forcibly treat stored lat/long data as if they used the WGS84 ellipsoid?"

Default this answer if you don't know what it means.

  "Distance calculation methods available are:
      1) British National Grid
      2) Irish National Grid
      3) UTM ellipsoid
   Which would you like to use?"

  (and if you choose UTM ellipsoid)
  "Which ellipsoid would you like to use? (eg 'Airy', 'WGS-84')"

See http://www.vterrain.org/Projections/ for how this all works.
A UTM (Universal Transverse Mercator) ellipsoid maps latitude and
longitude to eastings and northings on a square grid, which allows
more accurate distance calculations within the guide.  The British and
Irish National Grids are scaled and parametrised versions of UTM
ellipsoids (Airy 1830 in the British case, Modified Airy in the Irish).

Please note that at the moment there is no provision for changing your
mind later about which ellipsoid to use, but it shouldn't be too hard
to write a conversion script so don't worry too much about picking the
wrong one.  However do note that once you've entered some location
data you should not change this value in the config file without running
some kind of converter.

If you decide to use the British or Irish National Grid, your users
will be able to choose between entering location data as lat/long
or as grid co-ordinates.

You must have Geography::NationalGrid::GB installed to use the British
National Grid, Geography::NationalGrid::IE to use the Irish National
Grid, and Geo::Coordinates::UTM to use a UTM ellipsoid.

If you want to use a UTM ellipsoid, WGS-84 is the best choice, as it
will allow you to use the Google Maps support with the minimum of fuss.

* Dependency errors

If, after you have answered these questions, the build script complains
about missing dependencies, don't panic! Simply install them from CPAN and
then try again. Note that a wiki.conf file will have been written out at
this point, so if you retain it you won't have to answer all the questions
again.

* Custom templates and CSS

Once you have installed OpenGuides you may wish to edit templates that
provide site-specific design. These templates are stored in the directory
custom-templates/ by default and are described in the file CUSTOMISATION.
The id and class tags used for the CSS in OpenGuides are specified in
README.CSS.

* Security

The installer will try to create (or modify an existing) a .htaccess file
to protect wiki.conf, which contains sensitive data (ie passwords).
However we cannot tell whether apache (or any other web server you may be
using) is using this file, so you should check that it functioning and that
you cannot access wiki.conf over HTTP.

You should also configure wiki.conf with the minimum permissions required
so that local users cannot read the file. This is difficult to automate,
but the file should be probably be mode 0640, owned by root or an admin
user, and set to the group the web server runs with.

* Web server configuration

In order to let your web server serve up OpenGuides correctly, you will
have to tell it to recognise your installation directory as one
containing CGI scripts. However you can make your URLs nicer by
employing mod_rewrite as well. The following Apache configuration
directives show how:

        Alias /myguide /usr/lib/cgi-bin/myguide
        <Directory /usr/lib/cgi-bin/myguide>
            Options FollowSymLinks Indexes ExecCGI
            RewriteEngine on
            RewriteBase /myguide/
            RewriteRule ^$      wiki.cgi        [L]
        </Directory>
        Redirect /cgi-bin/myguide/ http://www.example.com/myguide/

You will of course need to make the appropriate substitutions for
your site. You also need to make sure that mod_rewrite is enabled in
your web server before adding such a configuration. The final step in
this URL tidying is to tell OpenGuides that the main CGI script can be
assumed to be called from the root of the install directory; do this by
setting the script name to be empty in wiki.conf:

        # what do you want the script to be called?
        script_name =

Currently the Build script does not support this value, so you will
have to make sure that you fix this up after an upgrade.


* Multiple installations

If you want to run multiple OpenGuides sites on one machine, you can use
some tricks to make life easier. This isn't currently part of the official
install routine, but will generally work. In the rest of this section we
will assume that you already have a working OpenGuides install for a
single site.

Make a directory for the new site, and populate it with a set of symlinks
to the main installation directory (ie. for wiki.cgi, supersearch.cgi,
newpage.cgi, preferences.cgi, and the templates directory). wiki.conf
will not be a symlink, since this will differ from the original site.
In this case, simply copy the wiki.conf from the original install and
modify it in the obvious way; most importantly, by giving it a different
database name (we'll create the database in a moment). Don't forget to
set up a separate directory for indices for the new site.

Normally, the database is created by the installation process described
above; however since we only want one copy of the modules and CGI
programs, it isn't appropriate to run them again. So we will make use of
the utility program "cgi-wiki-setupdb" which is included with the
CGI::Wiki distribution. Documentation for this command can be found in
its man page; run this with the appropriate arguments to create the
new database.

Once the key step of setting up the database has been performed, and the
web server configured appropriately, the new site should be ready to go!