[PR PATCH] mrep: fix subject not populating when pager stdout is not tty

[Parasrah <Parasrah@users.noreply.github.com>]

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There is a new pull request by Parasrah against master on the mblaze repository

https://github.com/Parasrah/mblaze master
https://github.com/leahneukirchen/mblaze/pull/243

mrep: fix subject not populating when pager stdout is not tty
If the pager is set to something where stdout is not a TTY, such as a text editor, it causes non-interactive calls to `mscan` to fail with the error: `Fatal error: stdout is not a tty`. When building the subject, `mrep` fetches the subject from the email being replied to using `mscan`, causing this error to manifest and the subject line to end up as: "Re: ". Explicitly setting the pager to `cat` when fetching the email subject in `mrep` prevents this error.

A patch file from https://github.com/leahneukirchen/mblaze/pull/243.patch is attached

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From 0279b94f0e13ff40a633559e39c1ba5355abe812 Mon Sep 17 00:00:00 2001
From: parasrah <dev@parasrah.com>
Date: Sun, 16 Jul 2023 22:35:05 -0600
Subject: [PATCH] mrep: fix subject not populating when pager stdout is not tty

If the pager is set to something where stdout is not a TTY, such as a
text editor, it causes non-interactive calls to mscan to fail with the
error: `Fatal error: stdout is not a tty`. When building the subject,
`mrep` fetches the subject from the email being replied to using
`mscan`, causing this error to manifest and the subject line to end up
as: "Re: ". Explicitly setting the pager to `cat` when fetching the
email subject in `mrep` prevents this error.
---
 mcom | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mcom b/mcom
index 4e834c6..90c7a56 100755
--- a/mcom
+++ b/mcom
@@ -373,7 +373,7 @@ fi
 			printf '%s\n' "$hdrs" | awk '{ print }' |
 				msed "/body/d" -
 		fi | sed '/^$/d'
-		printf 'Subject: Re: %s\n' "$(COLUMNS=10000 mscan -f '%S' "$1")"
+		printf 'Subject: Re: %s\n' "$(MBLAZE_PAGER=cat COLUMNS=10000 mscan -f '%S' "$1")"
 		if ! printf '%s\n' "$hdrs" | awk '{ print }' |
 		     mhdr -h from: - >/dev/null; then
 			addr=$(maddr -a -h delivered-to:to:cc:bcc: "$1" | replyfrom | head -n1)