From b8a81e934ba6a8c16f158e4a9ed017323d31bcb6 Mon Sep 17 00:00:00 2001
From: Patrick Spek <p.spek@tyil.nl>
Date: Wed, 22 Jun 2022 12:02:43 +0200
Subject: Update wrapper for even better usage

---
 .local/etc/wrapper.d/mpv.rc |  4 ---
 .local/share/wrapper.sh     | 86 ++++++++++++++++++++++++++++++++-------------
 2 files changed, 61 insertions(+), 29 deletions(-)

diff --git a/.local/etc/wrapper.d/mpv.rc b/.local/etc/wrapper.d/mpv.rc
index e1241f0..982eb6b 100644
--- a/.local/etc/wrapper.d/mpv.rc
+++ b/.local/etc/wrapper.d/mpv.rc
@@ -1,9 +1,5 @@
 #!/bin/sh
 
-WRAPPER_BINS="
-	mpv
-"
-
 wrap_before() {
 	if mpc status | awk 'NR==2 { print }' | grep -iq playing
 	then
diff --git a/.local/share/wrapper.sh b/.local/share/wrapper.sh
index 22a9d4d..40e3517 100755
--- a/.local/share/wrapper.sh
+++ b/.local/share/wrapper.sh
@@ -12,60 +12,96 @@
 
 main()
 {
-	wrapped="${0##*/}"
-	etcfile="$HOME/.local/etc/wrapper.d/$wrapped.rc"
+	WRAPPER_BINS_NORMALIZED="$(mktemp)"
+	WRAPPER_ETCFILE="$HOME/.local/etc/wrapper.d/${0##*/}.rc"
 
-	if [ ! -f "$etcfile" ]
+	if [ ! -f "$WRAPPER_ETCFILE" ]
 	then
 		printf "No configuration for %s found at %s\n" \
-			"$wrapped" \
-			"$etcfile" \
+			"${0##*/}" \
+			"$WRAPPER_ETCFILE" \
 			>&2
 
 		exit 3
 	fi
 
-	. "$etcfile"
+	# shellcheck disable=SC1090
+	. "$WRAPPER_ETCFILE"
 
-	if [ -z "$WRAPPER_BINS" ]
-	then
-		printf "No WRAPPER_BINS specified in %s\n" "$etcfile" >&2
-		exit 4
-	fi
+	# Turn all WRAPPER_BINS entries into full paths
+	for bin in ${WRAPPER_BINS:-${0##*/}}
+	do
+		case "$bin" in
+			./*|/*)
+				printf "%s\n" "$bin"
+				;;
+			*)
+				printf "%s" "$PATH" | sed 's/:/\n/g' | while read -r path
+				do
+					full_path="$(printf "%s/%s\n" "$path" "$bin")"
 
-	for bin in $WRAPPER_BINS
+					# Filter out any paths that refer to
+					# the wrapper script itself. This
+					# should ensure it won't call itself
+					# into perpetuity.
+					if [ "$full_path" = "$0" ]
+					then
+						continue
+					fi
+
+					printf "%s\n" "$full_path"
+				done
+		esac
+	done > "$WRAPPER_BINS_NORMALIZED"
+
+	# Clear some stray variables
+	unset bin
+	unset full_path
+	unset path
+
+	# Loop over all possible wrapped options, and run the first one that is
+	# executable
+	while read -r WRAPPER_BIN
 	do
-		# Check if this entry is sufficient
-		wrapper_check_executable "$bin" || continue
+		[ -x "$WRAPPER_BIN" ] || continue
 
 		# Add a firejail wrapper if desired
 		if [ -n "$FIREJAIL_PROFILE" ]
 		then
-			bin="firejail --profile=""$FIREJAIL_PROFILE"" -- $bin"
+			WRAPPER_BIN="firejail --profile=""$FIREJAIL_PROFILE"" -- $WRAPPER_BIN"
+		fi
+
+		# Optionally add WRAPPER_OPTS, so theres no double space in
+		# case it is empty.
+		if [ -n "$WRAPPER_OPTS" ]
+		then
+			WRAPPER_BIN="$WRAPPER_BIN $WRAPPER_OPTS"
 		fi
 
 		# Run all the things we want to run
 		wrap_before
-		printf "> %s\n" "$bin $WRAPPER_OPTS $@" >&2
-		$bin $WRAPPER_OPTS "$@"
-		exit=$?
+		wrap_run "$WRAPPER_BIN" "$@"
+		WRAPPER_EXITCODE=$?
 		wrap_after
 
-		return $exit
-	done
+		return $WRAPPER_EXITCODE
+	done < "$WRAPPER_BINS_NORMALIZED"
 
-	printf "No underlying executable found for %s:\n" "$wrapped" >&2
+	printf "No underlying executable found for %s:\n" "${0##*/}" >&2
 	for bin in $WRAPPER_BINS
 	do
 		printf "\t%s\n" "$bin" >&2
 	done
 }
 
-wrapper_check_executable() {
-	command -v "$1" > /dev/null && return 0
-	[ -x "$1" ] && return 0
+wrap_log() {
+	printf "[%s] %s\n" "$(date -u +%FT%TZ)" "$*" >&2
+}
 
-	return 1
+wrap_run() {
+	wrap_log "> $*"
+	# shellcheck disable=SC2068
+	$@
 }
 
 wrap_before() { :; }
-- 
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