From fe047338d08c73e7fa513777a792d78237107e71 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Karel=20Ko=C4=8D=C3=AD?= <karel.koci@nic.cz>
Date: Thu, 2 Aug 2018 13:52:42 +0200
Subject: Add inotify based inrun and insurf

---
 shellrc.d/common  | 24 ++++++++++++++++++++++++
 shellrc.d/desktop | 41 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 65 insertions(+)

diff --git a/shellrc.d/common b/shellrc.d/common
index 6fbbfc1..8a30f3b 100644
--- a/shellrc.d/common
+++ b/shellrc.d/common
@@ -103,3 +103,27 @@ ssh-clear() {
 chroot-bash() {
 	sudo chroot "$1" /bin/bash
 }
+
+# Run command with inotifywait
+# First argument has to be files then -- is expected and everything else
+# is command to be executed when file changes.
+inrun () {
+	(
+	set -e
+	local TMPFS="$(mktemp --tmpdir inrun.XXXXXXXX)"
+	trap "rm '$TMPFS'; trap '' EXIT; exit 0" EXIT INT QUIT TERM ABRT
+	while [ $# -gt 0 -a "$1" != "--" ]; do
+		echo "$1" >> "$TMPFS"
+		shift
+	done
+	if [ $# -le 1 ]; then
+		echo "Usage: inrun FILE.. -- COMMAND"
+		return 1
+	fi
+	shift
+	while true; do
+		inotifywait -qe close_write --fromfile "$TMPFS" || true
+		"$@" || true
+	done
+	)
+}
diff --git a/shellrc.d/desktop b/shellrc.d/desktop
index cc1a3b6..f155eed 100644
--- a/shellrc.d/desktop
+++ b/shellrc.d/desktop
@@ -3,3 +3,44 @@
 
 alias mutt='neomutt'
 alias sdcv='sdcv -c'
+
+# Following section is applicable for any desktop but only for graphics##########
+# TODO add check for wayland
+[ -z "$DISPLAY" ] && return
+
+# This function should not be called externaly
+# It expects PID of surf instace as first argument and all other arguments should
+# be command to be called before kill is sent.
+__insurf_callback() {
+	local SPID=$1
+	shift
+	"$@"
+	echo kill $SPID SIGHUP
+	kill -s SIGHUP $SPID || exit 1
+}
+
+# Same as inrun but it opens first argument it founds in surf and then reloads
+# that instance automatically.
+insurf() {
+	(
+	set -e
+	# Run surf
+	surf "$1" &
+	local SPID=$!
+	trap "kill $SPID; trap '' EXIT; exit 0" EXIT INT QUIT TERM ABRT
+	# Insert our callback
+	local ISFIRST=true
+	for ARG in "$@"; do
+		if $ISFIRST; then
+			shift $#
+			ISFIRST=false
+		fi
+		set "$@" "$ARG"
+		if [ "$ARG" = "--" ]; then
+			set "$@" "__insurf_callback" "$SPID"
+		fi
+	done
+	# Run inrun
+	inrun "$@"
+	)
+}
-- 
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