1 files changed, 47 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/tools/misc/units/default.nix b/nixpkgs/pkgs/tools/misc/units/default.nix
new file mode 100644
index 000000000000..8bea94770ba6
--- /dev/null
+++ b/nixpkgs/pkgs/tools/misc/units/default.nix
@@ -0,0 +1,47 @@
+{
+  stdenv,
+  lib,
+  fetchurl,
+  readline,
+  enableCurrenciesUpdater ? true,
+  pythonPackages ? null
+}:
+
+assert enableCurrenciesUpdater -> pythonPackages != null;
+
+stdenv.mkDerivation rec {
+  pname = "units";
+  version = "2.19";
+
+  src = fetchurl {
+    url = "mirror://gnu/units/${pname}-${version}.tar.gz";
+    sha256 = "0mk562g7dnidjgfgvkxxpvlba66fh1ykmfd9ylzvcln1vxmi6qj2";
+  };
+
+  pythonEnv = pythonPackages.python.withPackages(ps: [
+    ps.requests
+  ]);
+
+  buildInputs = [ readline ]
+    ++ lib.optionals enableCurrenciesUpdater [
+      pythonEnv
+    ]
+  ;
+  prePatch = ''
+    substituteInPlace units_cur \
+      --replace "#!/usr/bin/env python" ${pythonEnv}/bin/python
+  '';
+  postInstall = ''
+    cp units_cur ${placeholder "out"}/bin/
+  '';
+
+  doCheck = true;
+
+  meta = with stdenv.lib; {
+    description = "Unit conversion tool";
+    homepage = https://www.gnu.org/software/units/;
+    license = [ licenses.gpl3Plus ];
+    platforms = platforms.all;
+    maintainers = [ maintainers.vrthra ];
+  };
+}