From 3c5e3234905a668334f3ee05e95202262afff1ab Mon Sep 17 00:00:00 2001
From: Julian Ospald <hasufell@posteo.de>
Date: Wed, 24 Apr 2019 14:38:34 +0800
Subject: [PATCH] Improve some error handling

---
 ghcup | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/ghcup b/ghcup
index 731cfdd..d71a9aa 100755
--- a/ghcup
+++ b/ghcup
@@ -1217,6 +1217,7 @@ known_tool_versions() {
 
     mytool=$1
     meta_file="$(get_meta_version_file)"
+    [ -z "${meta_file}" ] && die "failed to get meta file"
 
     awk "
     NF {
@@ -1240,6 +1241,7 @@ known_tool_tags() {
 
     mytool=$1
     meta_file="$(get_meta_version_file)"
+    [ -z "${meta_file}" ] && die "failed to get meta file"
 
     awk "
     NF {
@@ -1744,6 +1746,7 @@ list() {
     criteria=$3
 
     meta_file="$(get_meta_version_file)"
+    [ -z "${meta_file}" ] && die "failed to get meta file"
 
     if ! ${raw_format} ; then
         printf "\\033[1;32m%s\\033[0m\\n" "Available versions:"