feat: Add antq.date/get-last-updated-at

cf. #214

src/antq/date.clj

@@ -0,0 +1,9 @@
+(ns antq.date)
+
+(defmulti get-last-updated-at
+  (fn [dep _options]
+    (:type dep)))
+
+(defmethod get-last-updated-at :default
+  [_ _]
+  nil)

src/antq/date/git_sha.clj

@@ -0,0 +1,11 @@
+(ns antq.date.git-sha
+  (:require
+   [antq.date :as date]
+   [antq.util.git :as u.git]))
+
+(defmethod date/get-last-updated-at :git-sha
+  [dep _options]
+  (let [url (get-in dep [:extra :url])
+        lib (some-> dep :name symbol)]
+    (when (and url lib)
+      (u.git/head-date url lib))))

src/antq/date/git_tag_and_sha.clj

@@ -0,0 +1,11 @@
+(ns antq.date.git-tag-and-sha
+  (:require
+   [antq.date :as date]
+   [antq.util.git :as u.git]))
+
+(defmethod date/get-last-updated-at :git-tag-and-sha
+  [dep _options]
+  (let [url (get-in dep [:extra :url])
+        lib (some-> dep :name symbol)]
+    (when (and url lib)
+      (u.git/head-date url lib))))

src/antq/date/java.clj

@@ -0,0 +1,11 @@
+(ns antq.date.java
+  (:require
+   [antq.date :as date]
+   [antq.util.dep :as u.dep]
+   [antq.util.maven :as u.maven]))
+
+(defmethod date/get-last-updated-at :java
+  [dep _options]
+  (u.maven/get-last-updated
+   (:name dep)
+   (u.dep/repository-opts dep)))