source : ftp://moulon.inra.fr/pub/ruby/plruby-0.1.tar.gz
 documentation : http://moulon.inra.fr/ruby/plruby.html

 Its real name is plruby! because it must be run with $SAFE >= 4. The
 default value (for $SAFE) can be changed only at compile time, but don't
 try to compile it with $SAFE < 4, because it run under the uid of
 postgres. 

 The file README.en contain 

 ============================================================

 PL/Ruby is a loadable procedural language for the Postgres database
system  that enable the Ruby language to create functions and trigger
procedures

* Prerequisite

   ruby >= 1.4.4
   source of postgresql (for some include files)

* Installation

   ruby extconf.rb
   make
   make install

 You may need to specify :

  --with-pgsql-include-dir=<include file directory for PostgreSQL>

  --with-pgsql-lib-dir=<library dir for PostgreSQL>

  --with-pgsql-srcinc-dir=<include file *from* the source of PostgreSQL>
     pgsql-srcinc-dir must contains, for example, the file catalog/pg_proc.h

 Example :

  ruby extconf.rb --with-pgsql-include-dir=/usr/include/postgresql \
                  --with-pgsql-lib-dir=/usr/lib \
                  --with-pgsql-srcinc-dir=/var/postgres/postgresl-6.5/src/include


* Test (and examples)

  make test

 this will run the 2 commands :

  ( cd test/plt; ./runtest )
  ( cd test/plp; ./runtest )

 The database plruby_test is created and then destroyed. Don't use it if 
 such a database exist on your system.

* Now create the PL/Ruby language in PostgreSQL

    Since the pg_language system catalog is private to each database,
    the new language can be created only for individual databases,
    or in the template1 database. In the latter case, it is
    automatically available in all newly created databases.

    The commands to create the new language are:

        create function plruby_call_handler () returns opaque
                as 'path-to-plruby-shared-lib'
                language 'C';

        create trusted procedural language 'plruby'
                handler plruby_call_handler
                lancompiler 'PL/Ruby';

    The trusted keyword on create procedural language tells PostgreSQL,
    that all users (not only those with superuser privilege) are
    permitted to create functions with LANGUAGE 'plruby'. This is
    absolutely safe, because there is nothing a normal user can do
    with PL/Ruby, to get around access restrictions he/she has.

* Documentation : see plruby.rd and plruby.html

* Copying

 This extension module is copyrighted free software by Guy Decoux

 You can redistribute it and/or modify it under the same term as
 Ruby.


Guy Decoux <ts / moulon.inra.fr>

 ============================================================


Guy Decoux