bug#54739: Make the Foot terminal an alias of xterm-256color

[Davide Masserut via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>]

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Tags: patch

The attached patch enables the Foot terminal [1] to display more colors
while running Emacs. The author of Foot suggests to do so in the project
wiki [2].

[1]: https://codeberg.org/dnkl/foot/
[2]: https://codeberg.org/dnkl/foot/wiki#user-content-only-8-colors-in-emacs



In GNU Emacs 29.0.50 (build 45, x86_64-pc-linux-gnu, GTK+ Version 3.24.33, cairo version 1.17.6)
 of 2022-04-05 built on T480s
Repository revision: 7d504c9acc0c8d75d11c3a2b5e016f39e6156bf8
Repository branch: master
System Description: Arch Linux

Configured using:
 'configure --prefix=/usr --sysconfdir=/etc --libexecdir=/usr/lib
 --localstatedir=/var --mandir=/usr/share/man --with-gameuser=:games
 --with-sound=alsa --with-modules --without-libotf --without-m17n-flt
 --without-gconf --without-gsettings --with-native-compilation
 --with-xinput2 --with-pgtk --without-xaw3d --with-sound=no
 --without-gpm --without-compress-install
 '--program-transform-name=s/\([ec]tags\)/\1.emacs/'
 'CFLAGS=-march=native -O2 -pipe -fno-plt -fexceptions
 -Wp,-D_FORTIFY_SOURCE=2 -Wformat -Werror=format-security
 -fstack-clash-protection -fcf-protection -g
 -ffile-prefix-map=/home/davide/src/emacs-git/src=/usr/src/debug'
 LDFLAGS=-Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now
 'CXXFLAGS=-march=native -O2 -pipe -fno-plt -fexceptions
 -Wp,-D_FORTIFY_SOURCE=2 -Wformat -Werror=format-security
 -fstack-clash-protection -fcf-protection -Wp,-D_GLIBCXX_ASSERTIONS -g
 -ffile-prefix-map=/home/davide/src/emacs-git/src=/usr/src/debug''


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From 2aebab915c0b1f5f46c1794557de017bdf3f2014 Mon Sep 17 00:00:00 2001
From: Davide Masserut <dm@mssdvd.com>
Date: Tue, 5 Apr 2022 22:57:20 +0200
Subject: [PATCH] Make the Foot terminal an alias of xterm-256color

* lisp/faces.el (term-file-aliases): Make the foot terminal an alias
of xterm-256color.
---
 lisp/faces.el | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lisp/faces.el b/lisp/faces.el
index 30f8483159..48a8222243 100644
--- a/lisp/faces.el
+++ b/lisp/faces.el
@@ -46,7 +46,8 @@ term-file-aliases
     ("vt320" . "vt200")
     ("vt400" . "vt200")
     ("vt420" . "vt200")
-    ("alacritty" . "xterm"))
+    ("alacritty" . "xterm")
+    ("foot" . "xterm"))
   "Alist of terminal type aliases.
 Entries are of the form (TYPE . ALIAS), where both elements are strings.
 This means to treat a terminal of type TYPE as if it were of type ALIAS."
-- 
2.35.1