77 lines
3.3 KiB
Nix
77 lines
3.3 KiB
Nix
{ stdenv, fetchurl, file, openssl, mlton, mysql, postgresql, sqlite }:
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stdenv.mkDerivation rec {
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pname = "urweb";
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version = "20140531";
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name = "${pname}-${version}";
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src = fetchurl {
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url = "http://www.impredicative.com/ur/${name}.tgz";
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sha256 = "0gbk16hzs8267cfhb7w1cqgjxdv2icxg5clxdbda6qsn84jaf3n4";
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};
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buildInputs = [ stdenv.gcc file openssl mlton mysql postgresql sqlite ];
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prePatch = ''
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sed -e 's@/usr/bin/file@${file}/bin/file@g' -i configure
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'';
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preConfigure =
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''
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export CC="${stdenv.gcc}/bin/gcc";
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export CCARGS="-I$out/include \
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-L${mysql}/lib/mysql -L${postgresql}/lib -L${sqlite}/lib";
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export PGHEADER="${postgresql}/include/libpq-fe.h";
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export MSHEADER="${mysql}/include/mysql/mysql.h";
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export SQHEADER="${sqlite}/include/sqlite3.h";
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'';
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configureFlags = "--with-openssl=${openssl}";
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dontDisableStatic = true;
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meta = {
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description = "Construct dynamic web applications backed by SQL databases";
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longDescription = ''
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Ur is a programming language in the tradition of ML and Haskell, but
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featuring a significantly richer type system. Ur is functional, pure,
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statically-typed, and strict. Ur supports a powerful kind of
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metaprogramming based on row types.
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Ur/Web is Ur plus a special standard library and associated rules for
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parsing and optimization. Ur/Web supports construction of dynamic web
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applications backed by SQL databases. The signature of the standard
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library is such that well-typed Ur/Web programs "don't go wrong" in a
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very broad sense. Not only do they not crash during particular page
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generations, but they also may not:
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* Suffer from any kinds of code-injection attacks
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* Return invalid HTML
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* Contain dead intra-application links
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* Have mismatches between HTML forms and the fields expected by their handlers
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* Include client-side code that makes incorrect assumptions about the "AJAX"-style services that the remote web server provides
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* Attempt invalid SQL queries
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* Use improper marshaling or unmarshaling in communication with SQL databases or between browsers and web servers
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This type safety is just the foundation of the Ur/Web methodology. It is
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also possible to use metaprogramming to build significant application pieces
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by analysis of type structure. For instance, the demo includes an ML-style
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functor for building an admin interface for an arbitrary SQL table. The
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type system guarantees that the admin interface sub-application that comes
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out will always be free of the above-listed bugs, no matter which well-typed
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table description is given as input.
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The Ur/Web compiler also produces very efficient object code that does not use
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garbage collection. These compiled programs will often be even more efficient
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than what most programmers would bother to write in C. For example, the
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standalone web server generated for the demo uses less RAM than the bash shell.
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The compiler also generates JavaScript versions of client-side code, with no need
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to write those parts of applications in a different language.
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'';
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homepage = http://www.impredicative.com/ur/;
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license = stdenv.lib.licenses.bsd3;
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platforms = [ "i686-linux" "x86_64-linux" ];
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};
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}
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