1 files changed, 46 insertions, 0 deletions
diff --git a/pkgs/applications/science/logic/twelf/default.nix b/pkgs/applications/science/logic/twelf/default.nix
new file mode 100644
index 000000000000..f5d2d44df425
--- /dev/null
+++ b/pkgs/applications/science/logic/twelf/default.nix
@@ -0,0 +1,46 @@
+{ stdenv, fetchurl, pkgconfig, smlnj, rsync }:
+
+stdenv.mkDerivation rec {
+  name = "twelf-${version}";
+  version = "1.7.1";
+
+  src = fetchurl {
+    url = "//twelf.plparty.org/releases/twelf-src-1.7.1.tar.gz";
+    sha256 = "0fi1kbs9hrdrm1x4k13angpjasxlyd1gc3ys8ah54i75qbcd9c4i";
+  };
+
+  buildInputs = [ pkgconfig smlnj rsync ];
+
+  buildPhase = ''
+    export SMLNJ_HOME=${smlnj}
+    make smlnj
+  '';
+
+  installPhase = ''
+    ensureDir $out/bin
+    rsync -av bin/* $out/bin/
+
+    ensureDir $out/share/emacs/site-lisp/twelf/
+    rsync -av emacs/ $out/share/emacs/site-lisp/twelf/
+
+    ensureDir $out/share/twelf/examples
+    rsync -av examples/ $out/share/twelf/examples/
+    ensureDir $out/share/twelf/vim
+    rsync -av vim/ $out/share/twelf/vim/
+  '';
+
+  meta = {
+    description = "Twelf logic proof assistant";
+    longDescription = ''
+      Twelf is a language used to specify, implement, and prove properties of
+      deductive systems such as programming languages and logics. Large
+      research projects using Twelf include the TALT typed assembly language,
+      a foundational proof-carrying-code system, and a type safety proof for
+      Standard ML.
+    '';
+    homepage = http://twelf.org/wiki/Main_Page;
+    license = "MIT";
+    maintainers = with stdenv.lib.maintainers; [ jwiegley ];
+    platforms = stdenv.lib.platforms.unix;
+  };
+}