#!/bin/sh

output='dependencies.dot'

cat /dev/null > "${output}"
echo "digraph dependencies {" >> "${output}"

source_files="$(find _build/default/src/app _build/default/src/lib -name '*.ml' -or -name '*.mli' -or -name '*.ml-gen')"
dep_stmts="$(echo "${source_files}" | xargs ocamldep -modules -ml-synonym .ml-gen)"
echo "${dep_stmts}"
for stmt in ${dep_stmts}; do
  target="$(\
    echo "${stmt}" |
    cut -d: -f1 |
    sed -e 's:\(_build/default/src/lib|_build/default/src/app\)/\(.\)\(.\+\)/.\+:\U\2\E\3:' \
  )"
  deps="$(\
    echo "${stmt}" |
    cut -d: -f2 |
    sed -e 's/^[[:space:]]*//' |
    sed -e 's/ /, /g' \
  )"
  echo "  ${target} -> {${deps}};" >> "${output}"
done

echo "}" >> "${output}"

dot -Tpng "${output}" > dependencies.png
display dependencies.png