Restrict zsh shwordsplit to downloader()

Author: rami3l

rustup-init.sh

@@ -19,11 +19,6 @@ has_local() {
 
 has_local 2>/dev/null || alias local=typeset
 
-# zsh does not split words by default, Required for curl retry arguments below.
-if [ -n "$ZSH_VERSION" ]; then
-    setopt shwordsplit
-fi
-
 set -u
 
 # If RUSTUP_UPDATE_ROOT is unset or empty, default it.
@@ -575,6 +570,11 @@ ignore() {
 # This wraps curl or wget. Try curl first, if not installed,
 # use wget instead.
 downloader() {
+    # zsh does not split words by default, Required for curl retry arguments below.
+    if [ -n "$ZSH_VERSION" ]; then
+        setopt local_options shwordsplit
+    fi
+
     local _dld
     local _ciphersuites
     local _err