feat(communication/neomutt): added auto syncing daemon that runs with the client

3 files changed, 104 insertions, 6 deletions

diff --git a/modules/communication/neomutt/default.nix b/modules/communication/neomutt/default.nix
index e091a7d..3354213 100644
--- a/modules/communication/neomutt/default.nix
+++ b/modules/communication/neomutt/default.nix
@@ -8,6 +8,12 @@
 let
   cfg = config.communication.neomutt;
 
+  mbsyncNamesFromName = (import ./lib.nix { inherit lib; }).mbsyncNamesFromName;
+
+  fullSyncChannels = lib.mapAttrsToList (name: account: (mbsyncNamesFromName name).channels.full) (
+    lib.filterAttrs (name: account: account.enable) config.communication.neomutt.accounts
+  );
+
   neomuttSyncScript = pkgs.writeShellApplication {
     name = "neomutt-sync";
     runtimeInputs = [
@@ -23,6 +29,37 @@ let
     text = builtins.readFile ./neomutt-sync.sh;
   };
 
+  neomuttSyncDaemon = pkgs.writeShellApplication {
+    name = "neomutt-sync-daemon";
+    runtimeInputs = [
+      config.terminal.bash.package
+      pkgs.coreutils
+      pkgs.procps
+      config.programs.mbsync.package
+      config.programs.notmuch.package
+    ];
+    text = builtins.readFile ./neomutt-sync-daemon.sh;
+  };
+
+  neomuttLauncher = pkgs.writeShellScriptBin "neomutt" (
+    builtins.replaceStrings
+      [
+        "@@SYSTEMCTL@@"
+        "@@PGREP@@"
+        "@@NEOMUTT@@"
+        "@@PROFILE_BIN@@"
+        "@@URLSCAN_BIN@@"
+      ]
+      [
+        (lib.getExe' pkgs.systemd "systemctl")
+        (lib.getExe' pkgs.procps "pgrep")
+        (lib.getExe pkgs.neomutt)
+        "${config.home.profileDirectory}/bin"
+        (lib.makeBinPath [ pkgs.urlscan ])
+      ]
+      (builtins.readFile ./neomutt-launcher.sh)
+  );
+
   neomuttSyncCompletion =
     pkgs.runCommand "neomutt-sync-completion"
       {
@@ -72,19 +109,15 @@ in
           (builtins.readFile ./mailcap);
       home.file.".local/share/icons/hicolor/scalable/apps/neomutt.svg".source =
         config.lib.file.mkOutOfStoreSymlink "${config.programs.neomutt.package}/share/neomutt/logo/neomutt.svg";
+
       programs.neomutt = {
         enable = true;
         package = pkgs.symlinkJoin {
           name = "neomutt-wrapped";
           paths = [
-            pkgs.neomutt
+            neomuttLauncher
             neomuttSync
           ];
-          nativeBuildInputs = [ pkgs.makeWrapper ];
-          postBuild = ''
-            wrapProgram $out/bin/neomutt \
-              --prefix PATH : ${config.home.profileDirectory}/bin:${lib.makeBinPath [ pkgs.urlscan ]}
-          '';
           meta.mainProgram = "neomutt";
         };
         sidebar.enable = true;
@@ -96,6 +129,16 @@ in
           builtins.readFile ./.neomuttrc
         );
       };
+
+      systemd.user.services.neomutt-sync = {
+        Unit = {
+          Description = "Full mail sync while neomutt is running";
+        };
+        Service = {
+          Type = "simple";
+          ExecStart = "${lib.getExe neomuttSyncDaemon} ${lib.concatStringsSep " " fullSyncChannels}";
+        };
+      };
     })
     (lib.mkIf (cfg.enable && config.terminal.kitty.enable) {
       xdg.desktopEntries."neomutt" = {
diff --git a/modules/communication/neomutt/neomutt-launcher.sh b/modules/communication/neomutt/neomutt-launcher.sh
new file mode 100644
index 0000000..d677680
--- /dev/null
+++ b/modules/communication/neomutt/neomutt-launcher.sh
@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+# Wrapped neomutt: keeps the neomutt-sync systemd daemon alive for the
+# lifetime of a neomutt session.
+set -uo pipefail
+SYSTEMCTL='@@SYSTEMCTL@@'
+PGREP='@@PGREP@@'
+NEOMUTT='@@NEOMUTT@@'
+
+"$SYSTEMCTL" --user start neomutt-sync.service || true
+stop_service() {
+  "$PGREP" -x neomutt >/dev/null || "$SYSTEMCTL" --user stop neomutt-sync.service || true
+}
+trap stop_service EXIT
+
+export PATH="@@PROFILE_BIN@@:@@URLSCAN_BIN@@:$PATH"
+"$NEOMUTT" "$@"
diff --git a/modules/communication/neomutt/neomutt-sync-daemon.sh b/modules/communication/neomutt/neomutt-sync-daemon.sh
new file mode 100644
index 0000000..a78ef5f
--- /dev/null
+++ b/modules/communication/neomutt/neomutt-sync-daemon.sh
@@ -0,0 +1,39 @@
+#!/usr/bin/env bash
+# systemd daemon: full-sync the -full channels every 10 minutes while
+# neomutt is open. Started/stopped by the wrapped neomutt launcher.
+
+set -uo pipefail
+
+INTERVAL="$((10 * 60))"
+MBSYNCRC="${MBSYNCRC:-$HOME/.config/mbsync/.mbsyncrc}"
+
+if [[ $# -eq 0 ]]; then
+  echo "Usage: $0 <mbsync-channel> [channel...]" >&2
+  exit 2
+fi
+
+sync_once() {
+  echo "Syncing: $*"
+
+  mbsync -c "$MBSYNCRC" "$@"
+  local status=$?
+  if ((status != 0)); then
+    echo "mbsync failed (status $status) for: $*" >&2
+    return "$status"
+  fi
+
+  echo "Indexing new mail with notmuch..."
+  notmuch new --quiet
+}
+
+while true; do
+  sync_once "$@"
+  sleep "$INTERVAL"
+
+  # Safety net: the launcher stops this service when neomutt exits; if that
+  # didn't happen (hard kill), bail out once neomutt is gone.
+  if ! pgrep -x neomutt >/dev/null; then
+    echo "neomutt is not running; stopping sync daemon" >&2
+    exit 0
+  fi
+done