Fix try_build_baseimage in tfw.sh

hack/libhack/baseimage.sh

@@ -8,11 +8,6 @@ libhack_dir="$(dirname "$(readlink -f "${BASH_SOURCE[0]}")")"
 source "${libhack_dir}/common.sh"
 
 
-baseimage::build_if_exists() {
-    [[ ! -d "${BASEIMAGE_PATH}" ]] && return ||:
-    baseimage::build
-}
-
 baseimage::build() {
     baseimage::assert_exists
     pushd "${BASEIMAGE_PATH}"
@@ -26,12 +21,16 @@ baseimage::build() {
 }
 
 baseimage::assert_exists() {
-    if [[ ! -d "${BASEIMAGE_PATH}" ]]; then
+    if ! baseimage::check_exists; then
         printf "Cannot find baseimage at ${BASEIMAGE_PATH}!\n"
         exit 1
     fi
 }
 
+baseimage::check_exists() {
+    [[ -d "${BASEIMAGE_PATH}" ]]
+}
+
 baseimage::release() {
     baseimage::assert_exists
     pushd "${BASEIMAGE_PATH}"

hack/tfw.sh

@@ -21,18 +21,17 @@ source "${SCRIPT_DIR}/libhack/challenge.sh"
 source "${SCRIPT_DIR}/libhack/frontend.sh"
 
 
+try_build_baseimage() {
+    if baseimage::check_exists; then
+        build_baseimage
+    fi
+}
+
 build_baseimage() {
     frontend_version="$(frontend::latest_tag)"
     baseimage::build
 }
 
-
-try_build_baseimage() {
-    frontend_version="$(frontend::latest_tag)"
-    baseimage::build_if_exists
-}
-
-
 case ${1:-} in
     start)
         try_build_baseimage