[PATCH] _hdiutil: run candidate-collecting loops outside the pipeline subshell

The `_hdiutil_disk` and `_hdiutil_device` helpers each use the following
pattern:

_call_program ... hdiutil ... | while read; do
  arr+=( ... )
done
# ... use $arr ...

Because every component of a zsh pipeline runs in its own subshell, the
array assignments  happen in the right-hand subshell and are lost by the
time the subsequent `_describe` / `_wanted` call runs in the parent shell.
The practical effect is that `hdiutil eject <TAB>` (which dispatches to
_hdiutil_disk via the detach|eject branch) never offers any
candidates, even when disk images are attached. _hdiutil_device has the
same shape and the same problem for `hdiutil burn -device <TAB>`.

The fix involves feeding the loop via process substitution so the loop body
runs in the parent shell, allowing the array to persist. I also made
REPLY local and switched to `read -r` so backslashes in the output are
not mangled.

Patch follows.
---
From 2026acc22c87dc98cb985748133f7fee24ebbab5 Mon Sep 17 00:00:00 2001
From: Clay Caviness <[email protected]>
Date: Fri, 29 May 2026 13:33:39 -0400
Subject: [PATCH] _hdiutil: run candidate-collecting loops outside the
pipeline
 subshell

Signed-off-by: Clay Caviness <[email protected]>
---
 Completion/Darwin/Command/_hdiutil | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/Completion/Darwin/Command/_hdiutil
b/Completion/Darwin/Command/_hdiutil
index 20e69cbc5..ada55bf1d 100644
--- a/Completion/Darwin/Command/_hdiutil
+++ b/Completion/Darwin/Command/_hdiutil
@@ -4,22 +4,24 @@
 #
 _hdiutil_disk() {
   local -a disk_desc
-  _call_program devices hdiutil info | while read; do
+  local REPLY
+  while read -r REPLY; do
     local disk_name="${${(M)REPLY[(w)1]%/dev/disk*}#/dev/}"
     if (( #disk_name )); then
       disk_desc+=( "$disk_name:${${(M)REPLY% *}#?}" )
     fi
-  done
+  done < <(_call_program devices hdiutil info)
   _describe -t devices disk disk_desc
 }

 _hdiutil_device() {
   local -a device_desc
-  _call_program devices /usr/bin/hdiutil burn -list | while read; do
+  local REPLY
+  while read -r REPLY; do
     if [[ "$REPLY" == [:space:]#IOService:* ]]; then
       device_desc+=( "$REPLY" )
     fi
-  done
+  done < <(_call_program devices /usr/bin/hdiutil burn -list)
   local expl
   _wanted devices expl device compadd "$device_desc[@]"
 }
-- 
2.50.1 (Apple Git-155)