initial creation of h2 backup plugin project

.gitignore

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+target/
+.idea/
+project/project/
+project/target/

README.MD

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+# gitbucket-h2-backup-plugin
+
+This plugin enhances [takezoe/gitbucket](https://github.com/takezoe/gitbucket) by offering a way to backup/dump the h2 database of gitbucket.
+
+It originates from [pull request #845](takezoe/gitbucket#845) and can be used to adress database backup described in [gitbucket backup documentation](https://github.com/takezoe/gitbucket/wiki/Backup)
+
+## Features
+
+### H2 Backup
+
+This plugin allows to backup the underlying H2 database used by default by gitbucket.
+
+## Usage
+
+The plugin provides 2 ways to backup the H2 database:
+
+- via an administration page and a backup button
+- via an HTTP call to http://YOUR_GITBUCKET/database/backup
+
+In current version database backup file is written to `GITBUCKET_HOME/.gitbucket/gitbucket-database-backup.zip`.
+
+## Release Notes
+
+### 1.0
+
+- introduce gitbucket-h2-backup-plugin
+- allows to backup h2 database via a live dump

project/build.properties

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+sbt.version = 0.13.5

project/build.scala

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+import sbt._
+import Keys._
+import play.twirl.sbt.SbtTwirl
+import play.twirl.sbt.Import.TwirlKeys._
+
+object MyBuild extends Build {
+
+  val Organization = "fr.brouillard.gitbucket"
+  val Name = "gitbucket-h2-backup-plugin"
+  val Version = "1.0"
+  val ScalaVersion = "2.11.6"
+
+  lazy val project = Project (
+    "gitbucket-h2-backup-plugin",
+    file(".")
+  )
+  .settings(
+    sourcesInBase := false,
+    organization := Organization,
+    name := Name,
+      version := Version,
+    scalaVersion := ScalaVersion,
+    scalacOptions := Seq("-deprecation", "-language:postfixOps"),
+    resolvers ++= Seq(
+      "amateras-repo" at "http://amateras.sourceforge.jp/mvn/"
+    ),
+    libraryDependencies ++= Seq(
+      "gitbucket"          % "gitbucket-assembly" % "3.5.0" % "provided",
+      "com.typesafe.play" %% "twirl-compiler"     % "1.0.4" % "provided",
+      "javax.servlet"      % "javax.servlet-api"  % "3.1.0" % "provided"
+    ),
+    javacOptions in compile ++= Seq("-target", "7", "-source", "7")
+  ).enablePlugins(SbtTwirl)
+}

project/plugins.sbt

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+logLevel := Level.Warn
+
+addSbtPlugin("com.typesafe.sbt" % "sbt-twirl" % "1.0.2")

sbt.bat

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+set SCRIPT_DIR=%~dp0
+java -Dsbt.log.noformat=true -XX:+CMSClassUnloadingEnabled -XX:MaxPermSize=256m -Xmx512M -Xss2M -jar "%SCRIPT_DIR%\sbt-launch-0.13.5.jar" %*

sbt.sh

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+#!/bin/sh
+java -Dsbt.log.noformat=true -XX:+CMSClassUnloadingEnabled -XX:MaxPermSize=256m -Xmx512M -Xss2M -jar `dirname $0`/sbt-launch-0.13.5.jar "$@"

src/main/scala/Plugin.scala

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+import javax.servlet.ServletContext
+
+import fr.brouillard.gitbucket.h2.controller.H2BackupController
+import gitbucket.core.plugin.PluginRegistry
+import gitbucket.core.service.SystemSettingsService.SystemSettings
+import gitbucket.core.util.Version
+
+class Plugin extends gitbucket.core.plugin.Plugin {
+  override val pluginId: String = "h2-backup"
+
+  override val pluginName: String = "H2 Database Backup Plugin"
+
+  override val description: String = "Allows to export h2 database of gitbucket"
+
+  override val versions: List[Version] = List(
+    Version(1, 0)
+  )
+
+  override def javaScripts(registry: PluginRegistry, context: ServletContext, settings: SystemSettings): Seq[(String, String)] = {
+    // Add Snippet link to the header
+    val path = settings.baseUrl.getOrElse(context.getContextPath)
+    Seq(
+      ".*/admin/h2backup" -> s"""
+        |$$('#system-admin-menu-container>li:last').after(
+        |  $$('<li class="active"><a href="${path}/admin/h2backup">H2 Backup</a></li>')
+        |);
+      """.stripMargin,
+      ".*/admin/(?!h2backup).*" -> s"""
+        |$$('#system-admin-menu-container>li:last').after(
+        |  $$('<li><a href="${path}/admin/h2backup">H2 Backup</a></li>')
+        |);
+      """.stripMargin
+    )
+  }
+
+  override val controllers = Seq(
+    "/admin/h2backup" -> new H2BackupController()
+    , "/database/backup" -> new H2BackupController()
+  )
+}

src/main/scala/fr/brouillard/gitbucket/h2/controller/H2BackupController.scala

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+package fr.brouillard.gitbucket.h2.controller
+
+import java.io.File
+
+import gitbucket.core.controller.ControllerBase
+import gitbucket.core.servlet.Database
+import gitbucket.core.util.Directory._
+import fr.brouillard.gitbucket.h2._
+import org.scalatra.Ok
+import org.slf4j.LoggerFactory
+
+class H2BackupController extends ControllerBase {
+  private val logger = LoggerFactory.getLogger(classOf[H2BackupController])
+
+  def exportDatabase: Unit = {
+    val session = Database.getSession(request)
+    val conn = session.conn
+    val exportFile = new File(GitBucketHome, "gitbucket-database-backup.zip")
+
+    logger.info("exporting database to {}", exportFile)
+
+    conn.prepareStatement("BACKUP TO '" + exportFile + "'").execute();
+  }
+
+  get("/admin/h2backup") {
+    html.export(flash.get("info"));
+  }
+
+  get("/database/backup") {
+    exportDatabase
+    Ok("done")
+  }
+
+  post("/database/backup") {
+    exportDatabase
+    flash += "info" -> "H2 Database has been exported."
+    redirect("/admin/h2backup")
+  }
+}

src/main/twirl/fr/brouillard/gitbucket/h2/export.scala.html

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+@(info: Option[Any])(implicit context: gitbucket.core.controller.Context)
+@import context._
+@import gitbucket.core.html.main
+@import gitbucket.core.admin.html.menu
+@import gitbucket.core.helper.html.information
+@import gitbucket.core.view.helpers._
+@import gitbucket.core.util.Directory._
+@main("H2 Backup"){
+@menu("h2backup"){
+@information(info)
+<form action="@path/database/backup" method="POST">
+    <div class="box">
+        <div class="box-header">Database export</div>
+        <div class="box-content">
+            <label><span class="strong">Database export file:</span>@GitBucketHome/gitbucket-database-backup.zip</label>
+            <p class="muted">
+                Allows to export the database content. The same action can be achieved via an HTTP GET call to @path/database/backup
+            </p>
+
+            <fieldset>
+                <input type="submit" class="btn btn-primary" value="Export database"/>
+            </fieldset>
+        </div>
+    </div>
+</form>
+}
+}
+