From 86c88670ea757cee11864ec00e6819726c65473a Mon Sep 17 00:00:00 2001
From: Peter Ward <peteraward@gmail.com>
Date: Thu, 18 Jul 2013 20:18:33 +1000
Subject: conditionally show the code

---
 docs/Makefile          | 2 +-
 docs/closest_apple.tex | 2 ++
 docs/random_avoid.tex  | 2 ++
 docs/random_simple.tex | 3 +++
 docs/tutorial.tex      | 5 +++++
 5 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/docs/Makefile b/docs/Makefile
index 5cd4a7e..1ccf8f0 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -17,7 +17,7 @@ ${BUILD_DIR}/%.tex: %.tex
 	./jinja2 --latex < $< > $@
 
 ${BUILD_DIR}/%.py: %.py
-	ln $< $@
+	ln -sf ../$< $@
 
 tutorial.pdf: ${BUILD_DIR}/tutorial.tex ${BUILD_FILES}
 	cd "${BUILD_DIR}" && \
diff --git a/docs/closest_apple.tex b/docs/closest_apple.tex
index 36b7382..b00768d 100644
--- a/docs/closest_apple.tex
+++ b/docs/closest_apple.tex
@@ -10,4 +10,6 @@ To find the shortest path, we need to use an algorithm called
 \emph{breadth first search} (BFS).
 % TODO: description of the algorithm
 
+\ifshowcode
 \pythonfile{closest_apple.py}
+\fi
diff --git a/docs/random_avoid.tex b/docs/random_avoid.tex
index 90ac183..136a250 100644
--- a/docs/random_avoid.tex
+++ b/docs/random_avoid.tex
@@ -162,6 +162,8 @@ def bot(board, position):
     return choice(valid_moves)
 \end{pythoncode}
 
+\ifshowcode
 If you’re really stuck, or want to check your solution, here’s my solution:
 \pythonfile{random_avoid.py}
+\fi
 
diff --git a/docs/random_simple.tex b/docs/random_simple.tex
index a1ff557..778ae9c 100644
--- a/docs/random_simple.tex
+++ b/docs/random_simple.tex
@@ -45,6 +45,8 @@ doesn’t know any better, it will happily move into the square where its tail i
 \label{brd:random-death}
 \end{board}
 
+\ifshowcode
+
 \pagebreak
 
 By the way, how long was your solution?
@@ -63,3 +65,4 @@ So if you write \mint{python}|choice('UDLR')|,
 that’s the same as if you had written
 \mint{python}|choice(['U', 'D', 'L', 'R'])|.
 
+\fi
diff --git a/docs/tutorial.tex b/docs/tutorial.tex
index a76760b..a43db5d 100644
--- a/docs/tutorial.tex
+++ b/docs/tutorial.tex
@@ -1,5 +1,8 @@
 \documentclass[12pt]{article}
 
+\newif\ifshowcode
+\showcodefalse
+
 \usepackage{fontspec}
 
 \usepackage[pdfborder={0 0 0}]{hyperref}
@@ -55,7 +58,9 @@
 
 \input{look_ahead.tex}
 
+\ifshowcode
 \break
+\fi
 \input{closest_apple.tex}
 
 \end{document}
-- 
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