From 2f8238342b9b2388e4cf235a3de4e717890db0bb Mon Sep 17 00:00:00 2001
From: Lawrence Wu <5601392+llwu@users.noreply.github.com>
Date: Sun, 10 Sep 2017 17:18:26 -0700
Subject: [PATCH] [install] Don't touch dotfiles if not requested (#1048)

---
 install | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/install b/install
index 416ec89..c6b4b8c 100755
--- a/install
+++ b/install
@@ -305,20 +305,22 @@ append_line() {
   line="$2"
   file="$3"
   pat="${4:-}"
+  lno=""
 
   echo "Update $file:"
   echo "  - $line"
-  [ -f "$file" ] || touch "$file"
-  if [ $# -lt 4 ]; then
-    lno=$(\grep -nF "$line" "$file" | sed 's/:.*//' | tr '\n' ' ')
-  else
-    lno=$(\grep -nF "$pat" "$file" | sed 's/:.*//' | tr '\n' ' ')
+  if [ -f "$file" ]; then
+    if [ $# -lt 4 ]; then
+      lno=$(\grep -nF "$line" "$file" | sed 's/:.*//' | tr '\n' ' ')
+    else
+      lno=$(\grep -nF "$pat" "$file" | sed 's/:.*//' | tr '\n' ' ')
+    fi
   fi
   if [ -n "$lno" ]; then
     echo "    - Already exists: line #$lno"
   else
     if [ $update -eq 1 ]; then
-      echo >> "$file"
+      [ -f "$file" ] && echo >> "$file"
       echo "$line" >> "$file"
       echo "    + Added"
     else