Add PostgreSQL support

build.sbt

@@ -38,6 +38,7 @@ libraryDependencies ++= Seq(
   "com.novell.ldap"           % "jldap"                        % "2009-10-07",
   "com.h2database"            % "h2"                           % "1.4.190",
   "mysql"                     % "mysql-connector-java"         % "5.1.38",
+  "org.postgresql"            % "postgresql"                   % "9.4.1208",
   "ch.qos.logback"            % "logback-classic"              % "1.1.1",
   "com.zaxxer"                % "HikariCP"                     % "2.4.5",
   "com.typesafe"              % "config"                       % "1.3.0",

src/main/resources/database_postgresql.conf

@@ -0,0 +1,5 @@
+db {
+  url = "jdbc:postgresql://192.168.99.100:32768/gitbucket"
+  user = "test"
+  password = "test"
+}

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

@@ -4,7 +4,7 @@ import com.typesafe.config.ConfigFactory
 import java.io.File
 import Directory._
 import liquibase.database.AbstractJdbcDatabase
-import liquibase.database.core.{MySQLDatabase, H2Database}
+import liquibase.database.core.{PostgresDatabase, MySQLDatabase, H2Database}
 import org.apache.commons.io.FileUtils
 
 object DatabaseConfig {
@@ -50,6 +50,8 @@ object DatabaseType {
       H2
     } else if(url.indexOf("mysql") >= 0){
       MySQL
+    } else if(url.indexOf("postgresql") >= 0){
+      PostgreSQL
     } else {
       throw new IllegalArgumentException(s"${url} is not supported.")
     }
@@ -66,4 +68,10 @@ object DatabaseType {
     val slickDriver = slick.driver.MySQLDriver
     val liquiDriver = new MySQLDatabase()
   }
+
+  object PostgreSQL extends DatabaseType {
+    val jdbcDriver = "org.postgresql.Driver"
+    val slickDriver = slick.driver.PostgresDriver
+    val liquiDriver = new PostgresDatabase()
+  }
 }