From 8d19ec771c083ce8bbfff9b075d42f15ad704831 Mon Sep 17 00:00:00 2001
From: Brett Parker <iDunno@sommitrealweird.co.uk>
Date: Tue, 8 Dec 2020 00:50:31 +0000
Subject: [PATCH] Add some notes and set the default file

---
 day10/check_asteroids.sh | 3 ++-
 day10/notes.txt          | 4 ++++
 2 files changed, 6 insertions(+), 1 deletion(-)
 mode change 100644 => 100755 day10/check_asteroids.sh
 create mode 100644 day10/notes.txt

diff --git a/day10/check_asteroids.sh b/day10/check_asteroids.sh
old mode 100644
new mode 100755
index d333a33..84958ed
--- a/day10/check_asteroids.sh
+++ b/day10/check_asteroids.sh
@@ -3,7 +3,8 @@
 set -u
 set -e
 
-filename=${1:-small_grid.txt}
+basedir=$(dirname $(readlink -f ${BASH_SOURCE}))
+filename=${1:-$basedir/3_4_8.txt}
 
 exec 3<$filename
 
diff --git a/day10/notes.txt b/day10/notes.txt
new file mode 100644
index 0000000..f918aab
--- /dev/null
+++ b/day10/notes.txt
@@ -0,0 +1,4 @@
+Files in the directory, other than input.txt, are named by the standard convention: x_y_asteroids.txt
+
+The script, check_asteroids.sh, can take a filename as the first parameter, if it's not specified it'll
+run 3_4_8.txt
-- 
2.30.2