Data import is available

src/main/scala/gitbucket/core/controller/FileUploadController.scala

@@ -6,6 +6,7 @@ import gitbucket.core.servlet.Database
 import gitbucket.core.util._
 import gitbucket.core.util.ControlUtil._
 import gitbucket.core.util.Directory._
+import gitbucket.core.util.Implicits._
 import org.eclipse.jgit.api.Git
 import org.eclipse.jgit.dircache.DirCache
 import org.eclipse.jgit.lib.{FileMode, Constants}
@@ -79,11 +80,20 @@ class FileUploadController extends ScalatraServlet with FileUploadSupport with R
   post("/import") {
     session.get(Keys.Session.LoginAccount).collect { case loginAccount: Account if loginAccount.isAdmin =>
       execute({ (file, fileId) =>
-        // TODO Import data here!!
-        println("********")
-        println(fileId)
-        println(file.getName)
-        println("********")
+        using(file.getInputStream){ in =>
+          import JDBCUtil._
+          val sql = IOUtils.toString(in, "UTF-8")
+          val conn = request2Session(request).conn
+          conn.setAutoCommit(false)
+          try {
+            conn.update(sql)
+            conn.commit()
+          } catch {
+            case e: Throwable =>
+              conn.rollback()
+              throw e
+          }
+        }
       }, _ => true)
     }
     redirect("/admin/data")

src/main/scala/gitbucket/core/util/DatabaseConfig.scala

@@ -1,13 +1,28 @@
 package gitbucket.core.util
 
 import com.typesafe.config.ConfigFactory
-import Directory.DatabaseHome
+import java.io.File
+import Directory._
 import liquibase.database.AbstractJdbcDatabase
 import liquibase.database.core.{MySQLDatabase, H2Database}
+import org.apache.commons.io.FileUtils
 
 object DatabaseConfig {
 
-  private lazy val config = ConfigFactory.load("database")
+  private lazy val config = {
+    val file = new File(GitBucketHome, "database.conf")
+    if(!file.exists){
+      FileUtils.write(file,
+        """db {
+          |  url = "jdbc:h2:${DatabaseHome};MVCC=true"
+          |  user = "sa"
+          |  password = "sa"
+          |}
+          |""".stripMargin, "UTF-8")
+    }
+    ConfigFactory.parseFile(file)
+  }
+
   private lazy val dbUrl = config.getString("db.url")
 
   def url(directory: Option[String]): String =

src/main/scala/gitbucket/core/util/JDBCUtil.scala

@@ -68,6 +68,12 @@ object JDBCUtil {
         val dbMeta = conn.getMetaData
         val allTablesInDatabase = allTablesOrderByDependencies(dbMeta)
 
+        allTablesInDatabase.reverse.foreach { tableName =>
+          if (targetTables.contains(tableName)) {
+            out.write(s"DELETE FROM ${tableName};\n".getBytes("UTF-8"))
+          }
+        }
+
         allTablesInDatabase.foreach { tableName =>
           if (targetTables.contains(tableName)) {
             val sb = new StringBuilder()

src/main/twirl/gitbucket/core/admin/data.scala.html

@@ -24,9 +24,16 @@
       <div class="panel-body">
         <form class="form form-horizontal" action="@path/upload/import" method="POST" enctype="multipart/form-data">
           <input type="file" name="file">
-          <input type="submit" class="btn btn-success pull-right" value="Import">
+          <input type="submit" class="btn btn-success pull-right" value="Import" id="import">
         </form>
       </div>
     </div>
   }
 }
+<script>
+$(function(){
+  $('#import').click(function(){
+    return confirm('All existing data is deleted before importing.\nAre you sure?');
+  })
+})
+</script>