Fix #22 in 0.4.6 by adding Leiningen release stub

build.boot

@@ -1,6 +1,6 @@
 (set-env! :resource-paths #{"src"})
 
-(def version "0.4.5")
+(def version "0.4.6")
 
 (task-options!
  pom {:project     'seancorfield/boot-new

src/leiningen/release.clj

@@ -0,0 +1,30 @@
+(ns leiningen.release
+  "Adapted from Leiningen's code by stripping things down to
+  just one method to support one particular template (play-clj)
+  that uses lein-droid, which expects parse-semantic-version
+  to be available here."
+  (:require [boot.util :as util]))
+
+(defn string->semantic-version
+  "Create map representing the given version string. Returns nil if the
+  string does not follow guidelines setforth by Semantic Versioning 2.0.0,
+  http://semver.org/"
+  [version-string]
+  ;; <MajorVersion>.<MinorVersion>.<PatchVersion>[-<Qualifier>][-SNAPSHOT]
+  (if-let [[_ major minor patch qualifier snapshot]
+           (re-matches
+            #"(\d+)\.(\d+)\.(\d+)(?:-(?!SNAPSHOT)([^\-]+))?(?:-(SNAPSHOT))?"
+            version-string)]
+    (->> [major minor patch]
+         (map #(Integer/parseInt %))
+         (zipmap [:major :minor :patch])
+         (merge {:qualifier qualifier
+                 :snapshot snapshot}))))
+
+(defn parse-semantic-version
+  "Create map representing the given version string. Aborts with exit code 1
+  if the string does not follow guidelines setforth by Semantic Versioning 2.0.0,
+  http://semver.org/"
+  [version-string]
+  (or (string->semantic-version version-string)
+      (util/exit-error (println "Unrecognized version string:" version-string))))