diff --git a/.bin/maketags b/.bin/maketags
new file mode 100755
index 0000000..3f5a358
--- /dev/null
+++ b/.bin/maketags
@@ -0,0 +1,51 @@
+#!/bin/sh
+
+set -xe
+
+# create files list
+find "${PWD}/"* -type f \
+            \( -iname "*.c" \
+            -o -iname "*.cc" \
+            -o -iname "*.cpp" \
+            -o -iname "*.c" \
+            -o -iname "*.h" \
+            -o -iname "*.hh" \
+            -o -iname "*.hpp" \
+            -o -iname "*.lua" \
+            -o -iname "*.gmk" \
+            -o -iname "*.pl" \
+            -o -iname "*.sh" \
+            -o -name "Makefile" \
+            \) > ${PWD}/.git/files
+
+# include extra directories
+if [ ! -z "$1" ]
+then
+    find $@ -type f \
+            \( -iname "*.c" \
+            -o -iname "*.cc" \
+            -o -iname "*.cpp" \
+            -o -iname "*.c" \
+            -o -iname "*.h" \
+            -o -iname "*.hh" \
+            -o -iname "*.hpp" \
+            -o -iname "*.lua" \
+            -o -iname "*.gmk" \
+            -o -iname "*.pl" \
+            -o -iname "*.sh" \
+            -o -name "Makefile" \
+            \) >> ${PWD}/.git/files
+fi
+
+# create cscope database
+cscope -qbkCRv -P${PWD} -f ${PWD}/.git/cscope.out -i${PWD}/.git/files
+
+# create tags file
+ectags --sort=yes \
+       --languages=C,C++,Make,Lua,Perl,Sh \
+       --tag-relative=no \
+       --extra=fq \
+       --totals=yes \
+       --exclude=.git \
+       -L ${PWD}/.git/files \
+       -f ${PWD}/.git/tags