From 6f23f29ba4eb6f7c67e846dacca2d692933bec1f Mon Sep 17 00:00:00 2001
From: Michael Raitza <michael.raitza@tu-dresden.de>
Date: Fri, 19 Feb 2021 09:27:27 +0100
Subject: [PATCH] Add convenience function l.S

Takes the same arguments as l.src but returns the necessary /bin/sh code that
creates a softlink to src and cd's to the location of the current do script.
---
 builder.nix | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/builder.nix b/builder.nix
index 1b139d6..127d052 100644
--- a/builder.nix
+++ b/builder.nix
@@ -21,6 +21,13 @@ let
         __functor = self: arg: resolve arg;
         src = getSrc root rcwd filter id;
         inherit pkgs cwd rcwd d1 d2;
+        # Convenience function that calculates the source tree, links it to src
+        # and cd's to the location of the current builder.
+        S = getSrc root rcwd filter (src:
+          ''
+            ln -s ${src} src
+            cd src/${rcwd}
+          '');
       };
 
       _builder = let