Don't let tfenv-version-name fail tfenv-list

tfenv-list:Helpfully note when no default is set

libexec/tfenv-list

@@ -68,9 +68,8 @@ done;
 [[ -x "${TFENV_ROOT}/versions" && -r "${TFENV_ROOT}/versions" ]] \
   || log 'error' "tfenv versions directory is inaccessible: ${TFENV_ROOT}/versions";
 
-version_name="$(tfenv-version-name)" \
-  && log 'debug' "tfenv-version-name reported: ${version_name}" \
-  || log 'error' "tfenv-version-name failed";
+version_name="$(tfenv-version-name 2>/dev/null || true)" \
+  && log 'debug' "tfenv-version-name reported: ${version_name}";
 export version_name;
 
 if [ -z "${TFENV_TERRAFORM_VERSION:-""}" ]; then
@@ -82,9 +81,21 @@ else
 fi
 export version_source;
 
+# Register for whether a default terraform version has yet been set
+declare -i default_set=0;
+
 print_version () {
   if [ "${1}" == "${version_name}" ]; then
+<<<<<<< HEAD
     echo "* ${1} (set by ${version_source})";
+=======
+    echo "* ${1} (set by ${version_file})";
+<<<<<<< HEAD
+    export default_set=1
+>>>>>>> c13cacc... tfenv-list:Helpfully note when no default is set
+=======
+    default_set=1
+>>>>>>> 15e68d0... Syntax
   else
     echo "  ${1}";
   fi;
@@ -101,3 +112,5 @@ log 'debug' 'Printing versions...';
 for local_version in ${local_versions[@]}; do
   print_version "${local_version}";
 done;
+
+! ((default_set)) && log 'info' "No default set. Set with 'tfenv use <version>'";