fix(terraform_docs): Allow having whitespaces in path to .terraform-docs.yaml config file (antonbabenko#796)

Author: tarfu

hooks/terraform_docs.sh

@@ -88,6 +88,7 @@ function terraform_docs {
  local add_to_existing=false
  local create_if_not_exist=false
  local use_standard_markers=true
+ local have_config_flag=false
 
  IFS=";" read -r -a configs <<< "$hook_config"
 
@@ -142,10 +143,18 @@ function terraform_docs {
  local tf_docs_formatter="md"
 
  else
-
- local config_file=${args#*--config}
- config_file=${config_file#*=}
- config_file=${config_file% *}
+ have_config_flag=true
+ # Enable extended pattern matching operators
+ shopt -qp extglob || EXTGLOB_IS_NOT_SET=true && shopt -s extglob
+ # Trim any args before the `--config` arg value
+ local config_file=${args##*--config@(+([[:space:]])|=)}
+ # Trim any trailing spaces and args (if any)
+ config_file="${config_file%%+([[:space:]])?(--*)}"
+ # Trim `--config` arg and its value from original args as we will
+ # pass `--config` separately to allow whitespaces in its value
+ args=${args/--config@(+([[:space:]])|=)$config_file*([[:space:]])/}
+ # Restore state of `extglob` if we changed it
+ [[ $EXTGLOB_IS_NOT_SET ]] && shopt -u extglob
 
  # Prioritize `.terraform-docs.yml` `output.file` over
  # `--hook-config=--path-to-file=` if it set
@@ -231,8 +240,10 @@ function terraform_docs {
  have_marker=$(grep -o "$insertion_marker_begin" "$output_file") || unset have_marker
  [[ ! $have_marker ]] && popd > /dev/null && continue
  fi
+ local config_options
+ [[ $have_config_flag == true ]] && config_options="--config=$config_file"
  # shellcheck disable=SC2086
- terraform-docs --output-mode="$output_mode" --output-file="$output_file" $tf_docs_formatter $args ./ > /dev/null
+ terraform-docs --output-mode="$output_mode" --output-file="$output_file" $tf_docs_formatter "$config_options" $args ./ > /dev/null
 
  popd > /dev/null
  done