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{ stdenv, fetchurl, file, openssl, mlton, mysql, postgresql, sqlite }:
stdenv.mkDerivation rec {
pname = "urweb";
version = "20130421";
name = "${pname}-${version}";
src = fetchurl {
url = "http://www.impredicative.com/ur/${name}.tgz";
sha256 = "1dglcial9bzximw778wbfqx99khy34qpf9gw4bbncn9f742ji872";
};
buildInputs = [ stdenv.gcc file openssl mlton mysql postgresql sqlite ];
prePatch = ''
sed -e 's@/usr/bin/file@${file}/bin/file@g' -i configure
'';
preConfigure =
''
export CC="${stdenv.gcc}/bin/gcc";
export CCARGS="-I$out/include \
-L${mysql}/lib/mysql -L${postgresql}/lib -L${sqlite}/lib";
export PGHEADER="${postgresql}/include/libpq-fe.h";
export MSHEADER="${mysql}/include/mysql/mysql.h";
export SQHEADER="${sqlite}/include/sqlite3.h";
'';
configureFlags = "--with-openssl=${openssl}";
dontDisableStatic = true;
meta = {
description = "Construct dynamic web applications backed by SQL databases";
longDescription = ''
Ur is a programming language in the tradition of ML and Haskell, but
featuring a significantly richer type system. Ur is functional, pure,
statically-typed, and strict. Ur supports a powerful kind of
metaprogramming based on row types.
Ur/Web is Ur plus a special standard library and associated rules for
parsing and optimization. Ur/Web supports construction of dynamic web
applications backed by SQL databases. The signature of the standard
library is such that well-typed Ur/Web programs "don't go wrong" in a
very broad sense. Not only do they not crash during particular page
generations, but they also may not:
* Suffer from any kinds of code-injection attacks
* Return invalid HTML
* Contain dead intra-application links
* Have mismatches between HTML forms and the fields expected by their handlers
* Include client-side code that makes incorrect assumptions about the "AJAX"-style services that the remote web server provides
* Attempt invalid SQL queries
* Use improper marshaling or unmarshaling in communication with SQL databases or between browsers and web servers
This type safety is just the foundation of the Ur/Web methodology. It is
also possible to use metaprogramming to build significant application pieces
by analysis of type structure. For instance, the demo includes an ML-style
functor for building an admin interface for an arbitrary SQL table. The
type system guarantees that the admin interface sub-application that comes
out will always be free of the above-listed bugs, no matter which well-typed
table description is given as input.
The Ur/Web compiler also produces very efficient object code that does not use
garbage collection. These compiled programs will often be even more efficient
than what most programmers would bother to write in C. For example, the
standalone web server generated for the demo uses less RAM than the bash shell.
The compiler also generates JavaScript versions of client-side code, with no need
to write those parts of applications in a different language.
'';
homepage = http://www.impredicative.com/ur/;
license = stdenv.lib.licenses.bsd3;
platforms = [ "i686-linux" "x86_64-linux" ];
};
}
|