args: with args;

let

  inherit (args.composableDerivation) composableDerivation edf wwf;

in

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

  version = "5.2.17";

  name = "php-${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 ];
      };

      readline = {
        configureFlags = ["--with-readline=${readline}"];
        buildInputs = [ readline ];
      };
    
      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;
    readlineSupport = getConfig ["php" "readline"] 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;
  };

  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
  '';

  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-${version}.tar.bz2/from/this/mirror";
    sha256 = "0v0i7zjp1a2c60imn58xjqcczmiglnfnwdkgwl0bfai4xh9yn6z8";
    name = "php-${version}.tar.bz2";
  };

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

  patches = [./fix.patch];

})
