David Heinemeier Hansson
a137760c89
* Reuse SSH connections for remote theme sync * Cover remote theme sync connection reuse
81 lines
3.2 KiB
Bash
Executable File
81 lines
3.2 KiB
Bash
Executable File
#!/bin/bash
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# omarchy:summary=Mirror the current theme to your herdr machines that run Omarchy
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# omarchy:args=[--available]
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# omarchy:hidden=true
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# omarchy-theme-set runs this in the background after every theme change. Sync is off until
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# the herdr-theme-sync toggle is turned on, and a machine only accepts themes with it on too.
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# Columns: id, label, SSH target, session, state.
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# This machine may be listed too, and it is already on the theme, so it needs no special case.
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targets=$(herdr machine list 2>/dev/null | awk -F '\t' '$5 == "enabled" { print $3 }')
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# The menu offers the toggle whenever there is a machine to sync to, whether or not sync is on.
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if [[ $1 == "--available" ]]; then
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[[ -n $targets ]]
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exit
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fi
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# Serialize runs and send whichever theme is current once the lock is held,
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# so a slow earlier run can never overwrite a later theme change.
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exec 9>"${XDG_RUNTIME_DIR:-/tmp}/omarchy-theme-set-herdr-machines.lock"
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flock 9
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# A theme that arrived from another machine stops here, so machines never echo it back.
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# The toggle is checked once the lock is held, so turning sync off also stops a queued run.
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if [[ -n $OMARCHY_THEME_SYNC_FROM ]] || ! omarchy-toggle-enabled herdr-theme-sync; then
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exit 0
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fi
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theme=$(cat "$HOME/.local/state/omarchy/current/theme.name" 2>/dev/null)
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control_dir="$XDG_RUNTIME_DIR/omarchy-theme-sync"
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mkdir -m 700 -p "$control_dir"
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# Runs on the remote machine under a login shell, so OMARCHY_PATH and PATH are set there.
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# SSH carries no desktop session, so the environment comes from the live Hyprland instance.
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# The flag is read directly, so an Omarchy that predates theme sync simply counts as off.
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# Braces make bash read the whole script before running it, so nothing it runs can consume the rest.
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read -r -d '' REMOTE_SCRIPT <<'EOF'
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{
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if [[ ! -f ~/.local/state/omarchy/toggles/herdr-theme-sync ]]; then
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echo "theme sync is off"
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exit
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fi
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if [[ $(cat ~/.local/state/omarchy/current/theme.name 2>/dev/null) == "$theme" ]]; then
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echo "already on $theme"
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exit
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fi
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export XDG_RUNTIME_DIR="/run/user/$(id -u)"
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instance=$(hyprctl instances -j 2>/dev/null | jq -r 'max_by(.time) // empty | "\(.instance) \(.wl_socket)"')
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if [[ -z $instance ]]; then
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echo "no Hyprland session"
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exit
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fi
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read -r HYPRLAND_INSTANCE_SIGNATURE WAYLAND_DISPLAY <<<"$instance"
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export HYPRLAND_INSTANCE_SIGNATURE WAYLAND_DISPLAY
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export DBUS_SESSION_BUS_ADDRESS="unix:path=$XDG_RUNTIME_DIR/bus"
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export OMARCHY_THEME_SYNC_FROM="$from"
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if omarchy theme set "$theme" >/dev/null 2>&1; then
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echo "set $theme"
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else
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echo "failed to set $theme"
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fi
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} </dev/null
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EOF
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# Reuse each authenticated connection for ten idle minutes, so an SSH agent like
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# 1Password does not need to approve every theme change. Connect one machine at a time.
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# SSH joins its arguments into a shell command, so the theme travels on stdin as a quoted assignment.
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for target in $targets; do
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result=$(printf 'theme=%q from=%q\n%s\n' "$theme" "$(hostname)" "$REMOTE_SCRIPT" |
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timeout 60 ssh -o BatchMode=yes -o ConnectTimeout=5 \
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-o ControlMaster=auto -o ControlPersist=600 -o "ControlPath=$control_dir/%C" \
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"$target" bash -l -s 2>&1 | tail -n 1)
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echo "$(date '+%F %T') $target: ${result:-unreachable}"
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done
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