mesh-catalog/modules/dunst/README.md

dunst

The notifier as a module (novox/hq ADR 0208, research 026/05).

• Installs dunst, and libnotify for notify-send, the client every program and these tools use.
• Claims the mesh's node-notifier seat and serves its verbs send and history.
• Owns ~/.config/dunst/dunstrc and the directory ~/.config/dunst/dunstrc.d/. Another module's rule is that module's own file in the directory (ADR 0208 §4). dunst reads the directory after dunstrc, so a drop-in outranks it.
• Starts nothing. The package registers dunst with D-Bus, which starts it on the first notification, inside the account's service manager. There is no autostart line, no unit and no session-start contribution.
• Requires no display of its own. dunst speaks both X11 and Wayland and picks the one the session has, so it serves an X session and a later sway one alike.

Tools

Every tool goes over the account's session bus. None needs the screen, and each answers clearly when the account is not logged in.

tool	does
node-notifier.send	a notification: title, body, urgency, sender, icon, how long; answers its id
node-notifier.history	what was shown, newest first, with how long ago
dunst_pause / dunst_resume	do not disturb: notifications are held back, not lost
dunst_close_all	clear the screen; the history keeps them
dunst_rules	the rules the running notifier holds, and the files they come from
dunst_count	shown, waiting, in history, and whether paused

What it chose, and what it improves

The workstations' files differed: one had the notifications bottom-right, 15 % transparent and with rounded corners; the other top-right, opaque and square. This module takes the second, because the rest of the desktop is square and opaque, and the top-right corner sits under the bar that shows the count. The file keeps only the settings that differ from dunst's defaults.

• The context menu works. It called /usr/bin/dmenu, installed on neither machine. It now calls dmenu, the seat command of whichever module holds node-launcher (rofi on the workstations).
• The face is the interface one, Inter (research 026/04), instead of a monospace Nerd font.
• icon_path, which named two directories of an icon theme that is not installed, is gone. The icon theme is looked up recursively.

What it leaves as found

• ~/.config/dunst/dunstrc.d/50-slack.conf, the Slack rule. It becomes the Slack module's own drop-in when there is one, and until then it is the operator's file in a directory this module owns.

Migration (ADR 0182)

• The first push keeps the found dunstrc once, then writes the module's.
• The desktop runs two notification daemons because its session began before the session bus fix (research 026/01). That ends at the next login, and nothing here starts a second one. dunst_count after logging in again shows the one daemon's counts.

Blockers

• node-notifier is ADR 0208's seat. Until the controller knows it, mctl reads the claim as unknown.
• dunst_rules and the counts ask the running notifier. When none runs, the bus starts one, which needs a session to draw on.