diff --git a/.travis.yml b/.travis.yml
index 21efe485a..290ad7607 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,6 +14,7 @@ script:
   - docker run -v $TRAVIS_BUILD_DIR:/documents/ --name asciidoctor-epub3 asciidoctor/docker-asciidoctor asciidoctor-epub3 -D /documents/output index.adoc
   - cp -r assets output/
   - cp -r -n legacy/* output/
+  - ./generate_rules_json.sh output
   - mv output/index.pdf output/zalando-guidelines.pdf
   - mv output/index.epub output/zalando-guidelines.epub
 
diff --git a/build.sh b/build.sh
index 0dfd43dd4..1c6d588cd 100755
--- a/build.sh
+++ b/build.sh
@@ -21,12 +21,7 @@ docker run -v ${SCRIPT_DIR}:/documents/ asciidoctor/docker-asciidoctor asciidoct
 cp -r assets ${BUILD_DIR}/
 cp -r -n legacy/* ${BUILD_DIR}/
 
-grep -Pzoh "(?s)\[(#[0-9]+)\]\n[=]+\s+.*?\n" chapters/* | \
-	sed '$!N;s/\n/ /' | tr -d "[]{}\000"| sed '/^\s*$/d' | \
-	sort | perl -pi -e 'chomp if eof' | \
-	jq -Rs '{rules: split("\n") }' | \
-	jq '{rules: .rules | map(. | {id: split(" == ")[0], title: split(" == ")[1]})}' \
-	> ${BUILD_DIR}/rules
+./generate_rules_json.sh
 
 mv ${BUILD_DIR}/index.pdf ${BUILD_DIR}/zalando-guidelines.pdf
 mv ${BUILD_DIR}/index.epub ${BUILD_DIR}/zalando-guidelines.epub
diff --git a/generate_rules_json.sh b/generate_rules_json.sh
new file mode 100755
index 000000000..917098be3
--- /dev/null
+++ b/generate_rules_json.sh
@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+# This script generates a JSON with information about the guideline rules.
+
+build_dir=${1:-output}
+
+grep -Pzoh "(?s)\[(#[0-9]+)\]\n[=]+\s+.*?\n" chapters/* | \
+        sed '$!N;s/\n/ /' | tr -d "[]{}\000"| sed '/^\s*$/d' | \
+        sort | perl -pi -e 'chomp if eof' | \
+        jq -Rs '{rules: split("\n") }' | \
+        jq '{rules: .rules | map(. | {id: split(" == ")[0], title: split(" == ")[1]})}' \
+        > ${build_dir}/rules