args: with args;

let

  inherit (args.composableDerivation) composableDerivation edf wwf;

in

composableDerivation {} ( fixed : let inherit (fixed.fixed) version; in {

  # choose a different version this way:
  # php.merge { version = "5.3.2"; }
  version = "5.2.11";

  name = "php_configurable-${version}";

  buildInputs = ["flex" "bison" "pkgconfig"];

  flags = {

# much left to do here...

    # SAPI modules:
    
      apxs2 = {
        configureFlags = ["--with-apxs2=${apacheHttpd}/bin/apxs"];
        buildInputs = [apacheHttpd];
      };

      # Extensions

      curl = {
        configureFlags = ["--with-curl=${args.curl}" "--with-curlwrappers"];
        buildInputs = [curl openssl];
      };
      
      zlib = {
        configureFlags = ["--with-zlib=${args.zlib}"];
        buildInputs = [zlib];
      };

      libxml2 = {
        configureFlags = [
          "--with-libxml-dir=${libxml2}"
          "--with-iconv-dir=${libiconv}"
          ];
        buildInputs = [ libxml2 ];
      };
    
      sqlite = {
        configureFlags = ["--with-pdo-sqlite=${sqlite}"];
        buildInputs = [ sqlite ];
      };
    
      postgresql = {
        configureFlags = ["--with-pgsql=${postgresql}"];
        buildInputs = [ postgresql ];
      };
    
      mysql = {
        configureFlags = ["--with-mysql=${mysql}"];
        buildInputs = [ mysql ];
      };

      mysqli = {
        configureFlags = ["--with-mysqli=${mysql}/bin/mysql_config"];
        buildInputs = [ mysql];
      };

      mysqli_embedded = {
        configureFlags = ["--enable-embedded-mysqli"];
        depends = "mysqli";
        assertion = fixed.mysqliSupport;
      };

      pdo_mysql = {
        configureFlags = ["--with-pdo-mysql=${mysql}"];
        buildInputs = [ mysql ];
      };
    
      bcmath = {
        configureFlags = ["--enable-bcmath"];
      };

      gd = {
        configureFlags = ["--with-gd=${args.gd}"];
        buildInputs = [gd libpng libjpeg ];
      };

      soap = {
        configureFlags = ["--enable-soap"];
      };

      sockets = {
        configureFlags = ["--enable-sockets"];
      };

      openssl = {
        configureFlags = ["--with-openssl=${args.openssl}"];
        buildInputs = ["openssl"];
      };

      mbstring = {
        configureFlags = ["--enable-mbstring"];
      };

      /*
         php is build within this derivation in order to add the xdebug lines to the php.ini.
         So both Apache and command line php both use xdebug without having to configure anything.
         Xdebug could be put in its own derivation.
      * /
        meta = {
                description = "debugging support for PHP";
                homepage = http://xdebug.org;
                license = "based on the PHP license - as is";
                };
      */
    };

  cfg = {
    mysqlSupport = getConfig ["php" "mysql"] true;
    mysqliSupport = getConfig ["php" "mysqli"] true;
    pdo_mysqlSupport = getConfig ["php" "pdo_mysql"] true;
    libxml2Support = getConfig ["php" "libxml2"] true;
    apxs2Support = getConfig ["php" "apxs2"] true;
    bcmathSupport = getConfig ["php" "bcmath"] true;
    socketsSupport = getConfig ["php" "sockets"] true;
    curlSupport = getConfig ["php" "curl"] true;
    gettextSupport = getConfig ["php" "gettext"] true;
    postgresqlSupport = getConfig ["php" "postgresql"] true;
    sqliteSupport = getConfig ["php" "sqlite"] true;
    soapSupport = getConfig ["php" "soap"] true;
    zlibSupport = getConfig ["php" "zlib"] true;
    opensslSupport = getConfig ["php" "openssl"] true;
    mbstringSupport = getConfig ["php" "mbstring"] true;
    gdSupport = getConfig ["php" "gd"] true;
  };

  # only -O1
  configurePhase = ''
    iniFile=$out/etc/php-recommended.ini
    [[ -z "$libxml2" ]] || export PATH=$PATH:$libxml2/bin
    ./configure --with-config-file-scan-dir=/etc --with-config-file-path=$out/etc --prefix=$out  $configureFlags
    echo configurePhase end
    sed -e 's/-O2/-O1/g' -i Makefile # http://bugs.php.net/bug.php?id=47730&edit=3
  '';

  installPhase = ''
    unset installPhase; installPhase;
    cp php.ini-${ if builtins.lessThan (builtins.compareVersions version "5.3") 0
        then "recommended" /* < PHP 5.3 */
        else "production" /* >= PHP 5.3 */
    } $iniFile
  '';

  src = args.fetchurl {
    url = "http://nl.php.net/get/php-${version}.tar.bz2/from/this/mirror";
    md5 = if version == "5.3.2" then "46f500816125202c48a458d0133254a4"
          else if version == "5.2.11" then "286bf34630f5643c25ebcedfec5e0a09"
          else throw "set md5 sum of php source file" ;
    name = "php-${version}.tar.bz2";
  };

  meta = {
    description = "The PHP language runtime engine";
    homepage = http://www.php.net/;
    license = "PHP-3";
  };

  patches = [./fix.patch];

})