GitBucketバックアップスクリプトをDBバックアップも取るようにする。

GitBucketは[開発元のwikiに上げられているスクリプト](https://github.com/gitbucket/gitbucket/wiki/Backup#backup-script
)でバックアップが取れる。

オプションで[gitbucket-h2-backup-plugin](https://github.com/gitbucket-plugins/gitbucket-h2-backup-plugin)を使うとDBのバックアップも取れる、らしい。
こいつのインストール手順は以下の通り。

1. releasesページからjarを落とす
2. .gitbucket内にpluginsフォルダを作成
3. jarをそこに配置
4. gitbucketを再起動

しかしこのままでスクリプトを動かしてもDBデータがバックアップ先にコピーされない。
なぜかを調べてみると、どうやら[gitbucket-h2-backup-pluginがver1.3.0に上がった時](https://github.com/gitbucket-plugins/gitbucket-h2-backup-plugin/commit/635283a688917bb498ae5992a1a46021715a8af6
)に
バックアップデータのzipファイル名に-YYYY-MM-DD-hhmmが付与されるようになったのだが、
それが前述のバックアップスクリプトには2017年5月1日現在まだ反映されていないようだ。

という訳でバックアップスクリプトを修正したものを下記に記載する。
（一文字*を加えただけだけど。）

```
#!/bin/bash

DEBUG=0
if [ "$1" = "-v" ]
then
    DEBUG=1
    shift
fi

GITBUCKET_DATA=$1
BACKUP_FOLDER=$2
GITBUCKET_DB_BACKUP_URL=$3

gitbucketRepositoriesFolder=$GITBUCKET_DATA/repositories
repositoriesFolderNameSize=${#gitbucketRepositoriesFolder}

repositoriesBackupFolder=$BACKUP_FOLDER/repositories

##
## trace allows to print messages on the console if -v argument (verbose) has been given to the program
## 
function trace {
    if [ "$DEBUG" = "1" ]
    then
        echo "$@"
    fi
}

##
## create a git mirror clone of a repository. If the clone already exists, the operation is skipped
##    arg1: source of the repository to be cloned
##    arg2: full folder name of the clone
## 
function createClone {
    source=$1
    dest=$2
    
    if [ ! -d $dest ]
    then
        trace "  cloning $source into $dest"
        git clone --mirror $source $dest > /dev/null 2>&1
    else
        trace "  $dest already exists, skipping git clone operation"
    fi
}

##
## update a clone folder, the update is down toward the latests state of it's default remote
##
function updateRepository {
    currentFolder=$(pwd)
    cd $1
    trace "  updating $1"
    git remote update > /dev/null
    cd $currentFolder
}

# Perform some initializations
if [ ! -d $repositoriesBackupFolder ] 
then
    mkdir -p $repositoriesBackupFolder > /dev/null
fi


#
# To keep integrity as its maximum possible, the database export and git backups must be done in the shortest possible timeslot.
# Thus we will:
#   - clone new repositories into backup directory
#   - update them all a first time, so that we gather gib updates
#   - export the database
#   - update all repositories a second time, this time it should be ultra-fast
#

# First let's be sure that all existing directories have a clone
# as clone operation can be heavy let's do it now
repositories=$(find $gitbucketRepositoriesFolder -name *.git -print)

echo "Starting clone process"
for fullRepositoryFolderPath in $repositories
do
    repositoryFolder=${fullRepositoryFolderPath:$repositoriesFolderNameSize}
    mirrorFolder=$repositoriesBackupFolder$repositoryFolder

    createClone $fullRepositoryFolderPath $mirrorFolder
done;
echo "All repositories, cloned"

echo "Update repositories: phase 1"
#
# Then let's update all our clones
# 
for fullRepositoryFolderPath in $repositories
do
    repositoryFolder=${fullRepositoryFolderPath:$repositoriesFolderNameSize}
    mirrorFolder=$repositoriesBackupFolder$repositoryFolder

    updateRepository $mirrorFolder
done;
echo "Update repositories: phase 1, terminated"

#
# Export the database
# 
if [ "$GITBUCKET_DB_BACKUP_URL" != "" ]
then
    echo "Database backup"
    curl $GITBUCKET_DB_BACKUP_URL > /dev/null
    cp -f $GITBUCKET_DATA/gitbucket-database-backup*.zip $BACKUP_FOLDER > /dev/null
else
    echo "No database URL provided, skipping database backup"
fi

#
# Export the GitBucket configuration
# 
echo "Configuration backup"
cp $GITBUCKET_DATA/gitbucket.conf $BACKUP_FOLDER > /dev/null

#
# Export the GitBucket data directory (avatars, ...)
# 
echo "Avatars backup"
tar -cf $BACKUP_FOLDER/data.tar $GITBUCKET_DATA/data > /dev/null 2>&1
gzip -f $BACKUP_FOLDER/data.tar > /dev/null

#
# Then let's do a final update
# 
echo "Update repositories: phase 2"
for fullRepositoryFolderPath in $repositories
do
    repositoryFolder=${fullRepositoryFolderPath:$repositoriesFolderNameSize}
    mirrorFolder=$repositoriesBackupFolder$repositoryFolder

    updateRepository $mirrorFolder
done;
echo "Update repositories: phase 2, terminated"

echo "Update process ended, backup available under: $BACKUP_FOLDER"
```
これを使えばDBのバックアップデータが入ったzipファイルも一緒にコピーされるはず。