Don't NPE if :tool-name option omitted

.github/workflows/clojure.yml

@@ -26,7 +26,7 @@ jobs:
       - name: Install clojure tools
         uses: DeLaGuardo/setup-clojure@13.4
         with:
-          cli: 1.12.2.1565
+          cli: 1.12.3.1577
 
       - name: Cache clojure dependencies
         uses: actions/cache@v4

deps.edn

@@ -1,7 +1,7 @@
 {:paths ["src"
          "resources"]
 
- :deps  {org.clj-commons/pretty   {:mvn/version "3.6.4"}
+ :deps  {org.clj-commons/pretty   {:mvn/version "3.6.5"}
          org.clj-commons/humanize {:mvn/version "1.1"}}
 
  :net.lewisship.build/scm
@@ -15,7 +15,7 @@
    :extra-deps  {io.github.cognitect-labs/test-runner {:git/tag "v0.5.1"
                                                        :git/sha "dfb30dd"}
                  io.github.hlship/trace               {:mvn/version "1.4"}
-                 io.github.tonsky/clj-reload          {:mvn/version "0.9.8"}
+                 io.github.tonsky/clj-reload          {:mvn/version "1.0.0"}
                  nubank/matcher-combinators           {:mvn/version "3.9.2"}
                  babashka/babashka                    {:mvn/version "1.12.208"}}
    :exec-fn     cognitect.test-runner.api/test
@@ -34,7 +34,7 @@
   {:override-deps {org.clojure/clojure ^:antq/exclude {:mvn/version "1.11.4"}}}
 
   :lint
-  {:deps      {clj-kondo/clj-kondo {:mvn/version "2025.07.28"}}
+  {:deps      {clj-kondo/clj-kondo {:mvn/version "2025.09.22"}}
    :main-opts ["-m" "clj-kondo.main" "--lint" "src" "test"]}
 
   :build

src/net/lewisship/cli_tools.clj

@@ -201,22 +201,26 @@
   "Expand dispatch options into tool options, leveraging a cache."
   [options]
   (let [{:keys [tool-name cache-dir cache-digest]} options
-        cache-dir'     (when cache-dir
-                         (fs/expand-home cache-dir))
-        digest         (when cache-dir'
-                         (or cache-digest
-                             (cache/classpath-digest options)))
-        cached         (when digest
-                         (cache/read-from-cache cache-dir' tool-name digest))
-        result         (if cached
-                         cached
-                         (let [expanded (impl/expand-tool-options options)]
-                           (when cache-dir'
-                             (cache/write-to-cache cache-dir' tool-name digest expanded))
-                           expanded))]
-    (merge result
-           {:cache-digest digest}
-           (select-keys options [:tool-name :doc :arguments :tool-summary :pre-dispatch]))))
+        tool-name'          (or tool-name
+                                (impl/default-tool-name)
+                                (throw (ex-info "No :tool-name specified" {:options options})))
+        cache-dir'          (when cache-dir
+                              (fs/expand-home cache-dir))
+        digest              (when cache-dir'
+                              (or cache-digest
+                                  (cache/classpath-digest options)))
+        cached-command-root (when digest
+                              (cache/read-from-cache cache-dir' tool-name' digest))
+        command-root        (if cached-command-root
+                              cached-command-root
+                              (let [built-command-root (impl/build-command-root tool-name' options)]
+                                (when cache-dir'
+                                  (cache/write-to-cache cache-dir' tool-name' digest built-command-root))
+                                built-command-root))]
+    (merge {:tool-name    tool-name'
+            :cache-digest digest
+            :command-root command-root}
+           (select-keys options [:doc :arguments :tool-summary :pre-dispatch]))))
 
 (defn- dispatch*
   "Called (indirectly/anonymously) from a tool handler to process remaining command line arguments."

src/net/lewisship/cli_tools/impl.clj

@@ -959,7 +959,7 @@
   (and (= 1 (count arguments))
        (-> arguments first map?)))
 
-(defn- default-tool-name
+(defn default-tool-name
   []
   (when-let [path (System/getProperty "babashka.file")]
     (-> path io/file .getName)))
@@ -1042,18 +1042,13 @@
       ; groups have just :group-doc, no :title
       doc' (assoc :group-doc doc'))))
 
-(defn expand-tool-options
-  [dispatch-options]
-  (let [{:keys [tool-name transformer]} dispatch-options
-        tool-name' (or tool-name
-                       (default-tool-name)
-                       (throw (ex-info "No :tool-name specified" {:options dispatch-options})))
+(defn build-command-root
+  [tool-name dispatch-options]
+  (let [{:keys [transformer]} dispatch-options
         ;; options are also the root descriptor for the built-in namespace
-        root       (-> dispatch-options
-                       (update :namespaces conj 'net.lewisship.cli-tools.builtins)
-                       (build-command-group nil tool-name)
-                       :subs)
-        root'      (cond->> root
-                            transformer (transformer dispatch-options))]
-    {:tool-name tool-name'
-     :command-root root'}))
+        root (-> dispatch-options
+                 (update :namespaces conj 'net.lewisship.cli-tools.builtins)
+                 (build-command-group nil tool-name)
+                 :subs)]
+    (cond->> root
+             transformer (transformer dispatch-options))))