mrsh: init at 2020-01-08

Signed-off-by: Matthias Beyer <mail@beyermatthias.de>

pkgs/shells/mrsh/default.nix

@@ -0,0 +1,24 @@
+{ stdenv, lib, fetchFromGitHub, meson, ninja, pkgconfig, readline }:
+
+stdenv.mkDerivation rec {
+  pname   = "mrsh";
+  version = "2020-01-08";
+
+  src = fetchFromGitHub {
+    owner = "emersion";
+    repo = "mrsh";
+    rev = "ef21854fc9ce172fb1f7f580b19a89d030d67c65";
+    sha256 = "1iyxmwl61p2x9v9b22416n4lnrlwjqyxybq35x8bcbjxkwypp943";
+  };
+
+  nativeBuildInputs = [ meson ninja pkgconfig ];
+  buildInputs = [ readline ];
+
+  meta = with stdenv.lib; {
+    description = "A minimal POSIX shell";
+    homepage = "https://mrsh.sh";
+    license = licenses.mit;
+    maintainers = with maintainers; [ matthiasbeyer ];
+    platforms = platforms.linux;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -5059,6 +5059,8 @@ in
 
   mr = callPackage ../applications/version-management/mr { };
 
+  mrsh = callPackage ../shells/mrsh { };
+
   mrtg = callPackage ../tools/misc/mrtg { };
 
   mscgen = callPackage ../tools/graphics/mscgen { };