Fix #1487: babashka.tasks/clojure with 0 args (#1488)

CHANGELOG.md

@@ -10,6 +10,7 @@ A preview of the next release can be installed from
 ## Unreleased
 - [#1000](https://github.com/babashka/babashka/issues/1000): add lib tests for xforms ([@bobisageek](https://github.com/bobisageek))
 - [#1482](https://github.com/babashka/babashka/issues/1482): make loading of libs thread safe
+- [#1487](https://github.com/babashka/babashka/issues/1487): `babashka.tasks/clojure` should be supported without arguments to start a REPL
 
 ## 1.1.173 (2023-02-04)
 

fs

@@ -1 +1 @@
-Subproject commit 4a03880df423a16263bbcd2c24f4ac6c7fb18d25
+Subproject commit 9f6b88ba3fb3ee23e753d6558940757eae98cdfe

src/babashka/impl/tasks.clj

@@ -67,12 +67,14 @@
       (apply log-info args)
       (handle-non-zero (pp/process* {:opts opts :cmd cmd :prev prev}) opts))))
 
-(defn clojure [cmd & args]
-  (let [[opts cmd args]
+(defn clojure [& args]
+  (let [[cmd & args] args
+        [opts cmd args]
         (if (map? cmd)
           [cmd (first args) (rest args)]
           [nil cmd args])
-        cmd (cons cmd args)
+        cmd (cond-> args
+              cmd (->> (cons cmd)))
         local-log-level (:log-level opts)]
     (sci/binding [log-level (or local-log-level @log-level)]
       (apply log-info (cons "clojure" cmd))

test/babashka/bb_edn_test.clj

@@ -308,7 +308,15 @@
     (test-utils/with-config
       (pr-str '{:tasks {foo (-> (clojure {:out :string} "-J-Dfoo=\"{:port 5555 :accept clojure.core.server/repl}\" -M -e \"(clojure.edn/read-string (System/getProperty (name :foo)))\"") :out clojure.edn/read-string prn)}})
       (is (= '{:port 5555, :accept clojure.core.server/repl}
-             (bb "run" "foo"))))))
+             (bb "run" "foo")))))
+  (testing "can be called without args"
+    (test-utils/with-config
+      (pr-str '{:tasks {foo (-> (clojure {:in "(+ 1 2 3)" :out :string}) :out prn)}})
+      (is (str/includes? (bb "run" "foo") "6")))
+    ;; can't properly test this, but `(clojure)` should work with zero args
+    #_(test-utils/with-config
+        (pr-str '{:tasks {foo (-> (clojure) :out prn)}})
+        (is (str/includes? (test-utils/bb "(+ 1 2 3)" "run" "foo") "6")))))
 
 (deftest list-tasks-test
   (test-utils/with-config {}