Merge pull request kubernetes#2541 from chaodaiG/fix-test

Add more debugging message when toc related script failed due to grep…

Author: k8s-ci-robot

hack/update-toc.sh

@@ -45,4 +45,7 @@ cd "${ROOT}"
 # Update tables of contents if necessary.
 find keps -name '*.md' \
     | grep -Fxvf hack/.notableofcontents \
-    | xargs mdtoc --inplace --max-depth=5
+    | xargs mdtoc --inplace --max-depth=5  || (
+      echo "Failed generating TOC. If this failed silently and you are on mac, try 'brew install grep'"
+      exit 1
+    )

hack/verify-toc.sh

@@ -46,4 +46,7 @@ echo "Checking table of contents are up to date..."
 # Verify tables of contents are up-to-date
 find keps -name '*.md' \
     | grep -Fxvf hack/.notableofcontents \
-    | xargs mdtoc --inplace --max-depth=5 --dryrun
+    | xargs mdtoc --inplace --max-depth=5 --dryrun || (
+      echo "Table of content not up to date. If this failed silently and you are on mac, try 'brew install grep'"
+      exit 1
+    )