enhance: add --version

Also print global options in help and error if db version not installed

deps/cli/src/logseq/cli.cljs

@@ -1,8 +1,11 @@
 (ns logseq.cli
   "Main ns for Logseq CLI"
-  (:require [babashka.cli :as cli]
+  (:require ["fs" :as fs]
+            ["path" :as node-path]
+            [babashka.cli :as cli]
             [clojure.string :as string]
-            [logseq.cli.commands.graph :as cli-graph]))
+            [logseq.cli.commands.graph :as cli-graph]
+            [logseq.cli.common.graph :as cli-common-graph]))
 
 (defn- format-commands [{:keys [table]}]
   (let [table (mapv (fn [{:keys [cmds desc]}]
@@ -11,18 +14,42 @@
                     (filter (comp seq :cmds) table))]
     (cli/format-table {:rows table})))
 
+(def ^:private default-spec
+  {:version {:coerce :boolean :alias :v}})
+
 (declare table)
 (defn- help [_m]
-  (println "Usage: logseq [command] [options]\n\nCommands:")
-  (println (format-commands {:table table})))
+  (println "Usage: logseq [command] [options]\n\nOptions:\n"
+           (cli/format-opts {:spec default-spec}))
+  (println (str "\nCommands:\n" (format-commands {:table table}))))
+
+(defn- default-command
+  [{{:keys [version]} :opts :as m}]
+  (if version
+    (let [package-json (node-path/join (node-path/dirname (second js/process.argv)) "package.json")]
+      (when (fs/existsSync package-json)
+        (println (-> (fs/readFileSync package-json)
+                     js/JSON.parse
+                     (aget "version")))))
+    (help m)))
 
 (def ^:private table
   [{:cmds ["list"] :fn cli-graph/list-graphs :desc "List graphs"}
-   {:cmds ["show"] :fn cli-graph/show-graph :args->opts [:graphs] :desc "Show graph(s) info"
+   {:cmds ["show"] :fn cli-graph/show-graph :args->opts [:graphs] :desc "Show DB graph(s) info"
     :coerce {:graphs []}}
-   {:cmds []         :fn help}])
+   {:cmds []
+    :spec default-spec
+    :fn default-command}])
+
+(defn- error-if-db-version-not-installed
+  []
+  (when-not (fs/existsSync (cli-common-graph/get-db-graphs-dir))
+    (println "Error: The database version's desktop app is not installed. Please install per https://github.com/logseq/logseq/#-database-version.")
+    (js/process.exit 1)))
 
 (defn ^:api -main [& args]
+  (when-not (contains? #{nil "-h" "--help"} (first args))
+    (error-if-db-version-not-installed))
   (cli/dispatch table args {:coerce {:depth :long}}))
 
 #js {:main -main}