From 6ecc40ac30c7e9d998dd71eccc39f64d3775497c Mon Sep 17 00:00:00 2001
From: typebrook <typebrook@gmail.com>
Date: Tue, 17 Mar 2020 10:50:58 +0800
Subject: Fix potential error when getting ID from a given index

Originally, if user gives command like 'gist .', _gist_id() still
returns true
---
 gist | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gist b/gist
index 2b74732..ae9596a 100755
--- a/gist
+++ b/gist
@@ -406,8 +406,8 @@ _repo_url() {
 
 # Get gist id from index files
 _gist_id() {
-  GIST_ID=$( (grep -hs '' $INDEX || true) | sed -n -e "/^$1 / p" | cut -d' ' -f2 | sed -E -e 's#.*/##')
-  if [[ -z $GIST_ID ]]; then
+  GIST_ID=$(sed -n -e "/^$1 / p" $INDEX | cut -d' ' -f2 | sed -E -e 's#.*/##')
+  if [[ -z $GIST_ID || ! $1 =~ [0-9a-z]+ ]]; then
     echo -e "$(hint=false _show_list | sed -Ee 's/^( *[0-9a-z]+)/\\033[5m\1\\033[0m/')"
     echo
     echo -e "Not a valid index: \e[33m$1\e[0m"
-- 
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