nixpkgs/modules/services/web-servers/apache-httpd/trac.nix

{ config, pkgs, serverInfo, ... }:

with pkgs.lib;

let
  
  # Build a Subversion instance with Apache modules and Swig/Python bindings.
  subversion = pkgs.subversion.override (origArgs: {
    bdbSupport = true;
    httpServer = true;
    sslSupport = true;
    compressionSupport = true;
    pythonBindings = true;
  });

  pythonLib = p: "${p}/";
  
in

{

  options = {
  
    projectsLocation = mkOption {
      description = "URL path in which Trac projects can be accessed";
      default = "/projects";
    };
    
    projects = mkOption {
      description = "List of projects that should be provided by Trac. If they are not defined yet empty projects are created.";
      default = [];
      example =
        [ { identifier = "myproject";
            name = "My Project";
            databaseURL="postgres://root:password@/tracdb";
            subversionRepository="/data/subversion/myproject";
          }
        ];
    };
    
    user = mkOption {
      default = "wwwrun";
      description = "User account under which Trac runs.";
    };

    group = mkOption {
      default = "wwwrun";
      description = "Group under which Trac runs.";
    };
    
  };

  extraModules = singleton
    { name = "python"; path = "${pkgs.mod_python}/modules/mod_python.so"; };
  
  extraConfig = ''
    <Location ${config.projectsLocation}>
      SetHandler mod_python
      PythonHandler trac.web.modpython_frontend
      PythonOption TracEnvParentDir /var/trac/projects
      PythonOption TracUriRoot ${config.projectsLocation}
      PythonOption PYTHON_EGG_CACHE /var/trac/egg-cache
    </Location>
  '';
  
  globalEnvVars = singleton
    { name = "PYTHONPATH";
      value =
        makeSearchPath "lib/${pkgs.python.libPrefix}/site-packages"
          [ pkgs.mod_python
            pkgs.pythonPackages.trac
            pkgs.setuptools
            pkgs.pythonPackages.genshi
            pkgs.pythonPackages.psycopg2
            subversion
          ];
    };
  
  startupScript = pkgs.writeScript "activateTrac" ''
    mkdir -p /var/trac
    chown ${config.user}:${config.group} /var/trac
    
    ${concatMapStrings (project:
      ''
        if [ ! -d /var/trac/${project.identifier} ]
        then
            export PYTHONPATH=${pkgs.pythonPackages.psycopg2}/lib/${pkgs.python.libPrefix}/site-packages
            ${pkgs.pythonPackages.trac}/bin/trac-admin /var/trac/${project.identifier} initenv "${project.name}" "${project.databaseURL}" svn "${project.subversionRepository}"
        fi
      '' ) (config.projects)}
  '';
  
}