fix versioning

build.gradle

@@ -11,14 +11,20 @@ repositories {
 }
 
 group = "io.trocco"
-// TODO
-// version = versionDetails().lastTag
-version = "0.0.0"
 description = "Dumps records to Databricks."
 
 sourceCompatibility = 1.8
 targetCompatibility = 1.8
 
+version = {
+    def vd = versionDetails()
+    if (vd.commitDistance == 0 && vd.lastTag ==~ /^v[0-9]+\.[0-9]+\.[0-9]+(\.[a-zA-Z0-9]+)?/) {
+        vd.lastTag.substring(1)
+    } else {
+        "0.0.0.${vd.gitHash}"
+    }
+}()
+
 dependencies {
     compileOnly "org.embulk:embulk-api:0.10.31"
     compileOnly "org.embulk:embulk-spi:0.10.31"