Provide --version option

.gitignore

@@ -8,3 +8,4 @@
 /share/
 /target/
 *.jar
+/src/nl/jomco/apie/version.txt

Makefile

@@ -19,11 +19,12 @@
 
 BB:=bb
 version:=$(shell git describe --tags)
+baked_version:=$(shell cat "src/nl/jomco/apie/version.txt")
 
 # need latest snapshot for standalone executables
 BABASHKA_VERSION:=1.3.188
 
-.PHONY: uberjar
+.PHONY: uberjar bake-version
 
 exec_base_name=apie
 release_name=$(exec_base_name)-$(version)
@@ -35,9 +36,12 @@ uberjar=$(exec_base_name)-$(version)-standalone.jar
 
 uberjar: $(uberjar)
 
-$(uberjar): deps.edn bb.edn $(source_files)
+$(uberjar): deps.edn bb.edn $(source_files) bake-version
 	$(BB) uberjar $@ -m nl.jomco.apie.main
 
+bake-version:
+	if [ "$(version)" != "$(baked_version)" ]; then	echo "$(version)" >src/nl/jomco/apie/version.txt; fi
+
 release: $(binary_release)
 
 # for unixy systems

src/nl/jomco/apie/main.clj

@@ -55,6 +55,9 @@
     "Maximum number of requests per operation in OpenAPI spec."
     :default ##Inf
     :parse-fn parse-long]
+   ["-v" "--version"
+    "Print version and exit."
+    :id :print-version?]
    ["-a" "--basic-auth 'USER:PASS'" "Send basic authentication header."
     :default nil
     :parse-fn (fn [s]
@@ -64,6 +67,12 @@
                   {:user user
                    :pass pass}))]])
 
+(defn version
+  "Return app version"
+  []
+  (when-let [r (io/resource "nl/jomco/apie/version.txt")]
+    (string/trim (slurp r))))
+
 (defn file-or-resource
   "Return f as file if it exists, otherwise as resource.
 
@@ -127,14 +136,17 @@
         spec-data            (if parent-dir
                                (read-json (io/file parent-dir openapi-spec))
                                (read-json (file-or-resource openapi-spec)))]
-      (when-not no-spider?
-        (spider spec-data profile-data options))
-      (when-not no-report?
-        (report spec-data options))))
+    (when-not no-spider?
+      (spider spec-data profile-data options))
+    (when-not no-report?
+      (report spec-data options))))
 
 (defn -main
   [& args]
   (let [{:keys [errors summary options]} (parse-opts args cli-options)]
+    (when (:print-version? options)
+      (println (version))
+      (System/exit 0))
     (when (seq errors)
       (run! println errors)
       (println summary)