From 29fb671e69f90ad3b04c6fa8d746caf857f89e77 Mon Sep 17 00:00:00 2001
From: Cliff Click <cliffc@acm.org>
Date: Tue, 22 Sep 2026 11:25:05 -0700
Subject: Add shared graph viewer to all chapters

---
 graph/graph.mk | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 graph/graph.mk

(limited to 'graph/graph.mk')

diff --git a/graph/graph.mk b/graph/graph.mk
new file mode 100644
index 00000000..1d5eb95a
--- /dev/null
+++ b/graph/graph.mk
@@ -0,0 +1,11 @@
+# Include after defining chapter source variables. Works in linearized checkouts too.
+GRAPH_DIR := $(patsubst %/,%,$(dir $(lastword $(MAKEFILE_LIST))))
+graph_javas := $(wildcard $(GRAPH_DIR)/src/main/java/com/seaofnodes/graph/*.java)
+main_javas += $(graph_javas)
+
+# Defining view here must not change the chapter's default target.
+graph_goal := $(.DEFAULT_GOAL)
+.PHONY: view
+view: build
+	java -ea -cp "$(CLZDIR)/main" com.seaofnodes.simple.print.SimpleGraphObserver
+.DEFAULT_GOAL := $(graph_goal)
-- 
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