From ab1dbe94462d611ce482d3d52ddd4262bdd69228 Mon Sep 17 00:00:00 2001
From: Sean Whitton <spwhitton@spwhitton.name>
Date: Mon, 26 Sep 2022 10:55:22 -0700
Subject: gdbmacs instance, s.t. can always run Emacs under gdb, and for Gnus

---
 bin/emacsclient | 35 +++++++++++++++++++++++++++--------
 1 file changed, 27 insertions(+), 8 deletions(-)

(limited to 'bin/emacsclient')

diff --git a/bin/emacsclient b/bin/emacsclient
index 0e6ab7a6..c261d469 100755
--- a/bin/emacsclient
+++ b/bin/emacsclient
@@ -21,11 +21,25 @@
 # daemons and choosing between installed and in-tree builds of Emacs.
 
 min_arg=0
+command -v ss >/dev/null || exit 1
+socket_dir="/run/user/$(id -u)/emacs/"
+get_listener () {
+    local socket="$1"
+    local listener=$(ss -Hplx src "$socket" \
+			 | perl -wne'/pid=(\d+)/ and print $1')
+    if [ -z "$listener" -a -e "$socket" ]; then
+	# Nothing is listening: remove dangling socket.
+	rm "$socket"
+    else
+	echo "$listener"
+    fi
+}
 
 for arg do
     shift
     case "$arg" in
 	'--spw/installed') mode=--spw/installed ;;
+	'--spw/no-start') start=false ;;
 	'--spw/update-environment') update=true ;;
 	'-s'|'--socket-name') min_arg=2; daemon_name="$1"        ;;&
 	'-s'?*)               min_arg=1; daemon_name="${arg:2}"  ;;&
@@ -34,14 +48,9 @@ for arg do
     esac
 done
 
-command -v ss >/dev/null || exit 1
-socket="/run/user/$(id -u)/emacs/${daemon_name:-server}"
-listener="$(ss -Hplx src $socket | perl -wne'/pid=(\d+)/ and print $1')"
-
-if [ -z "$listener" -a -e "$socket" ]; then
-    # Nothing is listening: remove dangling socket.
-    rm "$socket"
-elif [ -n "$listener" ]; then
+socket="$socket_dir${daemon_name:-server}"
+listener="$(get_listener $socket)"
+if [ -n "$listener" ]; then
     case "$(ps h -o exe $listener | sed -e 's/ (deleted)$//')" in
 	"$HOME/src/emacs/src/emacs")       devel_running=true     ;;
 	"$(realpath $(command -v emacs))") installed_running=true ;;
@@ -51,10 +60,20 @@ fi
 
 if [ "$devel_running" = true -a "$mode" = --spw/installed ]; then
     kill "$listener"
+
+    # Detach gdb so that Emacs can handle the SIGTERM.
+    # We also have to quit gdb so that `gdb-inferior-status' is reset from
+    # "signal-received"; see `spw/gdbmacs-attach' command.
+    [ -n "$(get_listener ${socket_dir}gdbmacs)" ] \
+	&& emacsclient -sgdbmacs --eval '(gud-basic-call "detach")' \
+		       --eval '(gud-basic-call "quit")'
+
     [ -e "$socket" ] && inotifywait -qqt 2 -e delete "$socket"
     devel_running=false
 fi
 
+[ "$start" = false -a -z "$listener" ] && exit 0
+
 # We check whether there is something which looks like the installed Emacs
 # running because we do not want the in-tree emacsclient to try to connect to
 # that, and we check whether there is a build in progress and no running
-- 
cgit v1.2.3