Cleanup Joshuto config

modules/desktop/files/joshuto_preview_file.sh

@@ -1,5 +1,3 @@
-#!/usr/bin/env bash
-
 ## This script is a template script for creating textual file previews in Joshuto.
 ##
 ## Copy this script to your Joshuto configuration directory and refer to this
@@ -61,6 +59,7 @@ while [ "$#" -gt 0 ]; do
             ;;
         "--preview-height")
             shift
+            # shellcheck disable=SC2034
             PREVIEW_HEIGHT="$1"
             ;;
     esac

modules/desktop/files/joshuto_wrapper.sh

@@ -0,0 +1,53 @@
+export joshuto_wrap_id="$$"
+joshuto_wrap_tmp="$(mktemp -d -t joshuto-wrap-$joshuto_wrap_id-XXXXXX)"
+export joshuto_wrap_tmp
+export joshuto_wrap_preview_meta="$joshuto_wrap_tmp/preview-meta"
+export ueberzug_pid_file="$joshuto_wrap_tmp/pid"
+export ueberzug_img_identifier="preview"
+export ueberzug_socket=""
+export ueberzug_pid=""
+
+# shellcheck disable=SC2317
+function start_ueberzugpp {
+    ## Adapt Überzug++ options here. For example, remove the '--no-opencv' or set another output method.
+    ueberzug layer --no-stdin --pid-file "$ueberzug_pid_file" --no-opencv &>/dev/null
+    ueberzug_pid="$(cat "$ueberzug_pid_file")"
+    export ueberzug_pid
+    export ueberzug_socket=/tmp/ueberzugpp-"$ueberzug_pid".socket
+    mkdir -p "$joshuto_wrap_preview_meta"
+}
+
+# shellcheck disable=SC2317
+function stop_ueberzugpp {
+    remove_image
+    ueberzug cmd -s "$ueberzug_socket" -a exit
+    kill "$ueberzug_pid"
+    rm -rf "$joshuto_wrap_tmp"
+}
+
+# shellcheck disable=SC2317
+function show_image {
+    ueberzug cmd -s "$ueberzug_socket" -a add -i "$ueberzug_img_identifier" -x "$2" -y "$3" --max-width "$4" --max-height "$5" -f "$1" &>/dev/null
+}
+
+# shellcheck disable=SC2317
+function remove_image {
+    ueberzug cmd -s "$ueberzug_socket" -a remove -i "$ueberzug_img_identifier" &>/dev/null
+}
+
+# shellcheck disable=SC2317
+function get_preview_meta_file {
+    echo "$joshuto_wrap_preview_meta/$(echo "$1" | md5sum | sed 's/ //g')"
+}
+
+export -f get_preview_meta_file
+export -f show_image
+export -f remove_image
+
+if [ -n "$DISPLAY" ] && command -v ueberzug > /dev/null; then
+    trap stop_ueberzugpp EXIT QUIT INT TERM
+    start_ueberzugpp
+fi
+
+joshuto "$@"
+exit $?