Use Bash [[ ... ]] everywhere

snapshotter.sh

@@ -25,7 +25,7 @@ function _download() {
   fi
 
   local include_directories="user,themes,ajax,javascript"
-  if [ "${1}" = "true" ]; then
+  if [[ ${1} = true ]]; then
     include_directories+=",task"
   fi
   local user_agent
@@ -75,7 +75,7 @@ function prettify() {
 
 function main() {
   local newest_task_id
-  if [ -n "${1:-}" ] && [ "${1}" != -1 ]; then
+  if [[ -n ${1:-} && ${1} != -1 ]]; then
     newest_task_id="${1}"
   else
     newest_task_id="$(get_newest_task_id)"
@@ -98,7 +98,7 @@ function main() {
   urls="$(generate_urls "${min}" "${max}")"
   local orig_pwd="${PWD}"
   local snapshot_dir=""
-  if [ -z "${4:-}" ]; then
+  if [[ -z ${4:-} ]]; then
     snapshot_dir="snapshots/$(date --iso-8601=minute)"
     mkdir -p "${snapshot_dir}"
   else
@@ -108,7 +108,7 @@ function main() {
   echo "${min}-${max}" > range
   download "${2:-true}" "${urls}"
   cleanup_html "${orig_pwd}"
-  if [ "${3:-true}" = "true" ]; then
+  if [[ ${3:-true} = true ]]; then
     prettify
   fi
 }