add isabat script

This just calls the isabelle2nix util and pipes its output directly into
bat, resulting in a somewhat usable cli tool for .thy files.

2 files changed, 34 insertions, 0 deletions

diff --git a/isabat b/isabat
new file mode 100755
index 0000000..12efd1d
--- /dev/null
+++ b/isabat
@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+if [ $# -eq 0 ]
+then
+    echo "isabat: pretty-print isabelle theories on a terminal using bat."
+    echo ""
+    echo "please provide a .thy file to display."
+    exit
+fi
+
+cat "$1" | isabelle2unicode | bat --file-name "$1" --theme TwoDark
diff --git a/isabat.nix b/isabat.nix
new file mode 100644
index 0000000..7fc05f2
--- /dev/null
+++ b/isabat.nix
@@ -0,0 +1,22 @@
+let
+  sources = import ./nix/sources.nix;
+  pkgs = import sources.nixpkgs {};
+  isabelle-unicode = import ./default.nix;
+in
+
+with pkgs;
+stdenv.mkDerivation {
+  pname = "isabat";
+  version = "0.1";
+
+  src = ./isabat;
+
+  phases = [ "buildPhase" ];
+
+  buildPhase = ''
+    cp $src isabat
+    substituteInPlace isabat \
+      --replace isabelle2unicode "${isabelle-unicode}/bin/isabelle2unicode"
+    cp isabat $out
+  '';
+}