1 files changed, 63 insertions, 0 deletions
diff --git a/.local/bin/nitrogen b/.local/bin/nitrogen
new file mode 100755
index 0000000..b8afe27
--- /dev/null
+++ b/.local/bin/nitrogen
@@ -0,0 +1,63 @@
+#!/usr/bin/env bash
+
+# Wrapper for nitrogen setting the freedesktop.org AccountsService/BackgroundFile so LightDM wallpaper is synced.
+# Inspired by <https://rafaelc.org/posts/sync-wm-wallpaper-with-lightdm-on-linux-mint/>
+
+key_value_retriever() {
+    KEY="${1}"
+    if [[ -z "$KEY" ]]; then
+        printf "ERROR: KEY should not be empty\n"
+        return
+    fi
+    FILE="${2}"
+    if [[ ! -f "$FILE" ]]; then
+        printf "ERROR: Cannot find FILE: %s\n" "$FILE"
+        return
+    fi
+    VALUE_VARNAME="${3}"
+    if [[ -z "$VALUE_VARNAME" ]]; then
+        printf "ERROR: VALUE_VARNAME should not be empty\n"
+        return
+    fi
+    MATCH=$(grep -m1 "^[[:space:]]*${KEY}=" "$FILE")
+    INDEX_OF_FIRST_EQUAL=$(expr index "$MATCH" =)
+    VALUE="${MATCH:${INDEX_OF_FIRST_EQUAL}}"
+    export "$VALUE_VARNAME"="$VALUE"
+}
+
+/usr/bin/nitrogen "$@"
+if [[ "${1:-}" == "--restore" ]]; then
+    exit $?
+fi
+
+NITROGEN_BG_SAVED_CFG_FILE="${HOME}/.config/nitrogen/bg-saved.cfg"
+if [[ ! -f "$NITROGEN_BG_SAVED_CFG_FILE" ]]; then
+    printf "!ERROR! Cannot find NITROGEN_BG_SAVED_CFG_FILE[%s]\n" "$NITROGEN_BG_SAVED_CFG_FILE" 1>&2
+    exit 1
+fi
+
+key_value_retriever "file" "$NITROGEN_BG_SAVED_CFG_FILE" "NITROGEN_BG_SAVED_CFG_FIRST_BACKGROUND_FILE"
+
+if [[ -z "$NITROGEN_BG_SAVED_CFG_FIRST_BACKGROUND_FILE" ]]; then
+    printf "!ERROR! Cannot retrieve NITROGEN_BG_SAVED_CFG_FIRST_BACKGROUND_FILE from NITROGEN_BG_SAVED_CFG_FILE[%s]\n" "NITROGEN_BG_SAVED_CFG_FIRST_BACKGROUND_FILE" 1>&2
+    exit 1
+fi
+
+if [[ ! -f "$NITROGEN_BG_SAVED_CFG_FIRST_BACKGROUND_FILE" ]]; then
+    printf "!ERROR! Cannot find NITROGEN_BG_SAVED_CFG_FIRST_BACKGROUND_FILE[%s]\n" "$NITROGEN_BG_SAVED_CFG_FIRST_BACKGROUND_FILE" 1>&2
+    exit 1
+fi
+
+printf "Setting nitrogen background into freedesktop.org AccountsService...\n"
+printf "NITROGEN_BG_SAVED_CFG_FIRST_BACKGROUND_FILE[%s]\n" "$NITROGEN_BG_SAVED_CFG_FIRST_BACKGROUND_FILE"
+
+"$HOME"/.scripts/lockscreen-wallpaper &
+dbus-send \
+    --print-reply \
+    --system \
+    --dest=org.freedesktop.Accounts \
+    /org/freedesktop/Accounts/User"$(id -u)" \
+    org.freedesktop.DBus.Properties.Set \
+    string:org.freedesktop.DisplayManager.AccountsService \
+    string:BackgroundFile \
+    variant:string:"$NITROGEN_BG_SAVED_CFG_FIRST_BACKGROUND_FILE"