feat: theme dunst in Macchiato with a wallpaper-driven accent frame

Notifications previously drew their colours from the pywal preset, so they were
pure black on white and did not match anything else. Structural colours are now
fixed Macchiato, with the accent as the frame on normal urgency, a muted
surface frame on low, and Macchiato red on critical. Font moves to Noto Sans to
match the rest of the desktop.

udt-accent substitutes the accent after pywal renders the template, then
restarts dunst so it rereads the file. It restarts rather than just killing:
nothing else respawns dunst, and a dead dunst means no notifications at all.

Also fixes a dangling reference: the template pointed dunst's dmenu at
darknix/main.rasi, a theme that no longer exists.

The template is tracked here as templates/dunstrc; the live copy is
~/.config/wal/templates/dunstrc.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01G6aeE37K4GHBsaM51yLTTq

2 files changed, 109 insertions, 0 deletions

diff --git a/bin/udt-accent b/bin/udt-accent
index fbd6a65..978f340 100755
--- a/bin/udt-accent
+++ b/bin/udt-accent
@@ -39,6 +39,7 @@ MIN_CHROMA = 10.0
 
 OUTPUT = Path.home() / ".cache" / "wal" / "udt-accent.rasi"
 BORDER_OUTPUT = Path.home() / ".cache" / "wal" / "udt-border.lua"
+DUNSTRC = Path.home() / ".cache" / "wal" / "dunstrc"
 
 
 def _to_lab(hexval):
@@ -162,6 +163,38 @@ def write_border(name):
         raise
 
 
+def write_dunst(name):
+    """Substitute the accent into the dunst config pywal just rendered.
+
+    pywal owns that file, so this runs after it and rewrites in place. A
+    missing file is not an error: dunst simply may not be configured here.
+    """
+    try:
+        text = DUNSTRC.read_text()
+    except FileNotFoundError:
+        return
+
+    if "@ACCENT@" not in text:
+        return
+
+    fd, tmp = tempfile.mkstemp(dir=str(DUNSTRC.parent), suffix=".tmp")
+    try:
+        with os.fdopen(fd, "w") as handle:
+            handle.write(text.replace("@ACCENT@", ACCENTS[name]))
+        os.replace(tmp, DUNSTRC)
+    except BaseException:
+        if os.path.exists(tmp):
+            os.unlink(tmp)
+        raise
+
+    # Restart dunst so it rereads the file. It must be started again, not just
+    # killed: nothing else respawns it, and a dead dunst means no notifications
+    # at all.
+    if subprocess.run(["pkill", "-x", "dunst"], capture_output=True).returncode == 0:
+        subprocess.Popen(["dunst"], start_new_session=True,
+                         stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
+
+
 def main(image):
     try:
         name = snap(signature_color(image))
@@ -172,6 +205,7 @@ def main(image):
 
     write_accent(name)
     write_border(name)
+    write_dunst(name)
 
     # Hyprland only rereads its config on request, and may not be running.
     subprocess.run(["hyprctl", "reload"], capture_output=True, check=False)
diff --git a/templates/dunstrc b/templates/dunstrc
new file mode 100644
index 0000000..44ed700
--- /dev/null
+++ b/templates/dunstrc
@@ -0,0 +1,75 @@
+# See dunst(5) for all configuration options
+[global]
+    monitor = 1
+    follow = none
+    width = 300
+    height = (0, 300)
+    origin = top-right
+    offset = (10, 50)
+    scale = 0
+    notification_limit = 0
+    progress_bar = true
+    progress_bar_height = 10
+    progress_bar_frame_width = 1
+    progress_bar_min_width = 150
+    progress_bar_max_width = 300
+    indicate_hidden = yes
+    transparency = 15
+    separator_height = 2
+    padding = 8
+    horizontal_padding = 8
+    text_icon_padding = 0
+    frame_width = 3
+    frame_color = "@ACCENT@"
+    gap_size = 0
+    separator_color = frame
+    sort = yes
+    font = Noto Sans 11
+    line_height = 0
+    markup = full
+    format = "<b>%a</b>\n<i>%s</i>%p %n\n%b"
+    alignment = left
+    vertical_alignment = center
+    show_age_threshold = 60
+    ellipsize = middle
+    ignore_newline = no
+    stack_duplicates = true
+    hide_duplicate_count = false
+    show_indicators = yes
+    enable_recursive_icon_lookup = true
+    icon_theme = MB-Blueberry-Suru-GLOW
+    icon_position = left
+    icon_corner_radius = 5
+    min_icon_size = 32
+    max_icon_size = 128
+    icon_path = ~/.local/share/icons/MB-Blueberry-Suru-GLOW/status/48/:/usr/share/icons/MB-Blueberry-Suru-GLOW/devices/48/
+    sticky_history = yes
+    history_length = 20
+    dmenu = /usr/bin/rofi -theme ~/.config/rofi/udt/list.rasi -dmenu -p dunst
+    browser = /usr/bin/xdg-open
+    always_run_script = true
+    title = Dunst
+    class = Dunst
+    corner_radius = 10
+    ignore_dbusclose = false
+    mouse_left_click = context, close_current
+    mouse_middle_click = do_action, close_current
+    mouse_right_click = close_all
+# to have a consistent behaviour across releases.
+[experimental]
+    per_monitor_dpi = false
+[urgency_low]
+    background = "#1e2030"
+    foreground = "#a5adcb"
+    frame_color = "#494d64"
+    timeout = 10
+[urgency_normal]
+    background = "#24273a"
+    foreground = "#cad3f5"
+    frame_color = "@ACCENT@"
+    timeout = 10
+[urgency_critical]
+    background = "#24273a"
+    foreground = "#cad3f5"
+    frame_color = "#ed8796"
+    timeout = 0