From 8eb07d94a12f0fb8d4a8f15043aedc8cadd7c676 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Isma=C3=ABl=20Bouya?= <ismael.bouya@normalesup.org>
Date: Wed, 22 Jul 2020 01:16:01 +0200
Subject: Initial commit

---
 shells/sub_bash.nix | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 shells/sub_bash.nix

(limited to 'shells/sub_bash.nix')

diff --git a/shells/sub_bash.nix b/shells/sub_bash.nix
new file mode 100644
index 0000000..656b385
--- /dev/null
+++ b/shells/sub_bash.nix
@@ -0,0 +1,16 @@
+# run with
+# nix-shell shell.nix --run 'touch in ; tail -f in | bash & echo $! > pid'
+# and then send commands with
+# echo 'compute_me "1 + 3"' >> in
+{ pkgs ? import <nixpkgs> {} }:
+pkgs.mkShell {
+  buildInputs = [ pkgs.bc ];
+  shellHook = ''
+    compute_me() {
+      echo "$1" | bc;
+    }
+    export -f compute_me
+
+    echo "I’m ready"
+    '';
+}
-- 
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