Run terraform_docs only if README.md is present

terraform_docs.sh

@@ -19,19 +19,24 @@ for file_with_path in "$@"; do
 done
 
 readonly tmp_file="tmp_$(date | md5).txt"
+readonly text_file="README.md"
 
 for path_uniq in $(echo "${paths[*]}" | tr ' ' '\n' | sort -u); do
   path_uniq="${path_uniq//__REPLACED__SPACE__/ }"
 
   pushd "$path_uniq" > /dev/null
 
+  if [[ ! -f "$text_file" ]]; then
+    continue
+  fi
+
   terraform-docs md ./ > "$tmp_file"
 
   # Replace content between markers with the placeholder - http://fahdshariff.blogspot.no/2012/12/sed-mutli-line-replacement-between-two.html
-  sed -i -n '/BEGINNING OF PRE-COMMIT-TERRAFORM DOCS HOOK/{p;:a;N;/END OF PRE-COMMIT-TERRAFORM DOCS HOOK/!ba;s/.*\n/I_WANT_TO_BE_REPLACED\n/};p' README.md
+  sed -i -n '/BEGINNING OF PRE-COMMIT-TERRAFORM DOCS HOOK/{p;:a;N;/END OF PRE-COMMIT-TERRAFORM DOCS HOOK/!ba;s/.*\n/I_WANT_TO_BE_REPLACED\n/};p' "$text_file"
 
   # Replace placeholder with the content of the file - https://stackoverflow.com/a/31057013/550451
-  sed -i -e "/I_WANT_TO_BE_REPLACED/r $tmp_file" -e "//d" README.md
+  sed -i -e "/I_WANT_TO_BE_REPLACED/r $tmp_file" -e "//d" "$text_file"
 
   rm -f "$tmp_file"