Add on-demand Obsidian Sync CLI for assistant

Author: assistant-ngalaiko[bot]

hosts/exedev/users/assistant.nix

@@ -8,6 +8,14 @@ let
   # node_modules that includes its own pi 0.83.0 — so it needs nothing else from
   # this account and survives recreations regardless of backup.
   pilegram = inputs.pilegram.packages.${pkgs.system}.default;
+  # Official Obsidian Sync headless CLI, packaged here so the assistant can run
+  # on-demand vault syncs without fetching npm packages at runtime.
+  obsidian-headless = import ../../../packages/obsidian-headless { inherit pkgs; };
+  obsidian-sync = pkgs.writeShellScriptBin "obsidian-sync" ''
+    set -eu
+    vault="''${OBSIDIAN_VAULT_DIR:-/var/lib/assistant/Vault}"
+    exec ${obsidian-headless}/bin/ob sync --path "$vault" "$@"
+  '';
 in
 {
   users.users.assistant = {
@@ -34,6 +42,8 @@ in
       fd # pi checks for fd at interactive startup and uses it for file autocomplete/find.
       ledger
       chromium
+      obsidian-headless
+      obsidian-sync
     ];
   };
   users.groups.assistant.gid = 2001;

packages/obsidian-headless/default.nix

@@ -0,0 +1,34 @@
+{ pkgs }:
+let
+  inherit (pkgs) lib;
+in
+pkgs.buildNpmPackage {
+  pname = "obsidian-headless";
+  version = "0.0.14";
+
+  src = pkgs.fetchurl {
+    url = "https://registry.npmjs.org/obsidian-headless/-/obsidian-headless-0.0.14.tgz";
+    hash = "sha512-S1d/hxLKvCUG2g5tRyXFkzPqMs3Ntw1tDyzoF2yfHGRuB4B+Mi3X2vgT8LbfQKrkEEi3LfJRdXtYzAVHcbpccw==";
+  };
+  sourceRoot = "package";
+
+  postPatch = ''
+    cp ${./package-lock.json} package-lock.json
+  '';
+
+  npmDepsHash = "sha256-Pcy6hxgc9MyTe/a7bE4pMtXjG9hx4HNwZgbfIzTtVRQ=";
+
+  nodejs = pkgs.nodejs_22;
+  dontNpmBuild = true;
+  npmFlags = [
+    "--ignore-scripts"
+    "--omit=dev"
+  ];
+
+  meta = {
+    description = "Headless client for Obsidian Sync and Publish";
+    homepage = "https://github.com/obsidianmd/obsidian-headless";
+    license = lib.licenses.mit;
+    mainProgram = "ob";
+  };
+}