resolve unused modules

Author: vladak

dev/check-unused-modules.sh

@@ -1,11 +1,20 @@
 #!/bin/bash
 
-ret=$( find modules/ -type f -name '*.md' | while read f; do
-	if ! grep "$f\"" input/*/*.md >/dev/null; then
-		echo $f;
+# First, find modules not used directly in the input files.
+not_in_input=$( find modules/ -type f -name '*.md' | while read f; do
+	f=$(basename $f)
+	if ! grep "^#include \"modules\/.*$f\"" input/*/*.md >/dev/null; then
+		echo "$f";
 	fi;
 done; )
 
+# Next, see if these are referenced from any other module.
+ret=$( for f in $not_in_input; do
+	if ! grep "#module $f" modules/*.md >/dev/null; then
+		echo "$f"
+	fi
+done )
+
 if [[ -n $ret ]]; then
 	echo "$ret"
 	exit 1

input/2024/12.md

@@ -2,6 +2,7 @@
 #include "modules/warm-up/print-binary.md"
 
 #include "modules/bitwise-operations.md"
+#include "modules/bitwise-vs-logical.md"
 
 #include "modules/warm-up/bitdiff.md"
 #include "modules/warm-up/altbits.md"

input/2025/01.md

@@ -1,4 +1,5 @@
 #include "modules/intro.md"
+#include "modules/c99-standard.md"
 #include "modules/first-class-objective.md"
 #include "modules/hello-world.md"
 #include "modules/basics.md"

input/2025/04.md

@@ -7,11 +7,14 @@
 #include "modules/scope.md"
 #include "modules/variable-argument-functions.md"
 #include "modules/ternary-operator.md"
+#include "modules/ternary-operator-quiz.md"
 #include "modules/negative-numbers.md"
 #include "modules/arithmetic-type-conversions.md"
+#include "modules/rank.md"
 #include "modules/function-arguments.md"
 #include "modules/compiler-warnings.md"
 #include "modules/types-of-behavior.md"
+#include "modules/undefined-behavior.md"
 #include "modules/integer-overflow.md"
 
 # :wrench: Home assignments

input/2025/05.md

@@ -11,6 +11,7 @@ integer promotion and conversions.
 #include "modules/multi-dimensional-arrays.md"
 
 #include "modules/arithmetic-promotion-and-conversions.md"
+#include "modules/integer-to-unsigned-integer-c89.md"
 
 #include "modules/home-assignments/home-assignment-section.md"
 #include "modules/home-assignments/mountain-generator.md"

input/2025/06.md

@@ -5,7 +5,10 @@
 
 #include "modules/for-loop.md"
 #include "modules/expressions-intro.md"
+#include "modules/side-effect.md"
 #include "modules/statements.md"
+#include "modules/compound-statement-within-expression.md"
+
 #include "modules/pointers.md"
 
 #include "modules/err.md"