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Migrando do Gitolite para o GitLab com um Shell Script

O processo de migração geralmente é uma tarefa difícil, especialmente quando a quantidade de informações que precisam ser transferidas é tão grande que se torna mais rentável automatizá-las. Foi a necessidade de migrar do Gitolite para o GitLab que me levou a escrever um artigo sobre minha experiência nesse assunto.


Para migrar repositórios, usarei um computador com o sistema operacional CentOS 7. Instalado, preciso instalar o seguinte conjunto de aplicativos: git, ssh-agent, curl, jq, xargs .


Para começar, precisamos obter a chave de acesso à API do GitLab. Na interface da web, vá para a seção de configurações do usuário. Em seguida, selecione o item de menu “Access Tokens” . No formulário que é aberto, você deve especificar o nome da chave recebida e também pode especificar o período em que a chave estará ativa. Abaixo, marque a caixa ao lado do item da API e clique no botão "Criar token de acesso pessoal" . Essa chave será usada ao enviar solicitações para a API do GitLab.


  1. Preparando o ambiente de trabalho


    GitLab SSH, , GitLab. GitLab «Admin area» «Deploy keys» «New deploy key». , . , GitLab. bash:


    curl -k -X GET --header "PRIVATE-TOKEN: <your private token>" <gitlab url>/api/v4/deploy_keys

    : SSH git , ssh-agent. :


    eval `ssh-agent`

    ssh-add ~/.ssh/id_rsa

  2. GitLab API


    GitLab, POST API GitLab, , . Projects API GitLab GitLab.


    # $1 - gitlab remote url
# $2 - api access token
# $3 - remote repository name
# $4 - remote repository namespace identifier
initRemoteRepository() {
    local response=`curl -s -k -X POST --header "Private-Token: $2" --data "name=$3&namespace_id=$4&visibility=private&description=$3" $1/api/v4/projects`
    local id=`echo $response | jq -r ".id"`
    echo "$id"
}

    initRemoteRepository . .
    : –k , GitLab .


  3. API


    , , . Deploy Keys API GitLab GitLab.


    # $1 - remote url
# $2 - api token
# $3 - repository identifier
# $4 - deploy key identifier
enableRepositoryDeployKey() {
    local response=`curl -s -k -X POST --header "Private-Token: $2" $1/api/v4/projects/$3/deploy_keys/$4/enable`
    echo "$response"
}

    enableRepositoryDeployKey .


    # $1 - remote url
# $2 - api token
# $3 - repository identifier
# $4 - deploy key identifier
setRepositoryWriteAccess() {
    local response=`curl -s -k -X PUT --header "PRIVATE-TOKEN: $2" --header "Content-Type: application/json" --data '{"can_push": true}' $1/api/v4/projects/$3/deploy_keys/$4`
    echo "$response"
}

    setRepositoryWriteAccess .



  4. , . GitLab, . . GitLab.


    # $1 - branch
# $2 – separator
getCanonicalBranchName() {
    local branch=""
    IFS=$2 read -r -a array <<< "$1"
    length=${#array[@]}
    for index in "${!array[@]}"
    do
        if [ $index -gt 0 ]; then
            if [ $index -eq 1 ]; then
                local branch="${array[index]}"
            else
                local branch="$branch/${array[index]}"
            fi
        fi
    done
    echo "$branch"
}
PSWD="$(dirname "$0")"
cd $PSWD
while IFS= read -r REPOSITORY
do
    echo "====================  <$REPOSITORY>  ===================="
    GITOLITE_REPO=$GITOLITE$REPOSITORY
    echo "Run cloning remote repository $GITOLITE_REPO"
    git clone $GITOLITE_REPO
    cd $REPOSITORY
    GITLAB_REPO=$GITLAB$REPOSITORY.git
    echo "Initialize remote gitgab repository $GITLAB_REPO"
    PROJECT=$(initRemoteRepository $GITLAB_URL $API_TOKEN $REPOSITORY)
    echo "Remote repository initialized identifier $PROJECT"
    echo "Add deploy key and enable write access to remote repository $REPOSITORY ($PROJECT)"
    response=$(enableRepositoryDeployKey $GITLAB_URL $API_TOKEN $PROJECT $DEPLOY_KEY_ID)
    response =$(setRepositoryWriteAccess $GITLAB_URL $API_TOKEN $PROJECT $DEPLOY_KEY_ID)
    echo "Add new remote url for repository $GITLAB_REPO"
    git remote add gitlab $GITLAB_REPO
    # push all branches
    IFS_BACK=$IFS
    IFS=$'\n'
    branches=$(git branch -r)
    for branchName in $branches; do
        trimBranchName=`echo $branchName | xargs`
        canonicalBranchName=$(getCanonicalBranchName $trimBranchName '/')
        echo "$trimBranchName ($canonicalBranchName) init push"
        git checkout -b $canonicalBranchName remotes/origin/$canonicalBranchName
        git push -f gitlab $canonicalBranchName
    done
    IFS=$IFS_BACK
    cd ..
    rm -r -f $REPOSITORY
    echo "====================  <$REPOSITORY>  ===================="
    echo ""
done < "$REPOSITORIES"

    , . .



Script completo
REPOSITORIES="<repositories_file>"
GITOLITE="<gitolite_ssh_url>"
GITLAB_URL="<gitlab_api_url>"
GITLAB="<gitolite_ssh_url>"
API_TOKEN="<api_access_token>"
DEPLOY_KEY_ID="<deploy_key_identifier>"
# $1 - gitlab remote url
# $2 - api access token
# $3 - remote repository name
# $4 - remote repository namespace identifier
initRemoteRepository() {
        local response=`curl -s -k -X POST --header "Private-Token: $2" --data "name=$3&namespace_id=$4&visibility=private&description=$3" $1/api/v4/projects`
        local id=`echo $response | jq -r ".id"`
        echo "$id"
}
# $1 - remote url
# $2 - api token
# $3 - repository identifier
# $4 - deploy key identifier
setRepositoryWriteAccess() {
    local response=`curl -s -k -X PUT --header "PRIVATE-TOKEN: $2" --header "Content-Type: application/json" --data '{"can_push": true}' $1/api/v4/projects/$3/deploy_keys/$4`
    echo "$response"
}
# $1 - remote url
# $2 - api token
# $3 - repository identifier
# $4 - deploy key identifier
enableRepositoryDeployKey() {
    local response=`curl -s -k -X POST --header "Private-Token: $2" $1/api/v4/projects/$3/deploy_keys/$4/enable`
    echo "$response"
}
# $1 - branch
# $2 – separator
getCanonicalBranchName() {
    local branch=""
    IFS=$2 read -r -a array <<< "$1"
    length=${#array[@]}
    for index in "${!array[@]}"
    do
        if [ $index -gt 0 ]; then
            if [ $index -eq 1 ]; then
                local branch="${array[index]}"
            else
                local branch="$branch/${array[index]}"
            fi
        fi
    done
    echo "$branch"
}
PSWD="$(dirname "$0")"
cd $PSWD
while IFS= read -r REPOSITORY
do
    echo "====================  <$REPOSITORY>  ===================="
    GITOLITE_REPO=$GITOLITE$REPOSITORY
    echo "Run cloning remote repository $GITOLITE_REPO"
    git clone $GITOLITE_REPO
    cd $REPOSITORY
    GITLAB_REPO=$GITLAB$REPOSITORY.git
    echo "Initialize remote gitgab repository $GITLAB_REPO"
    PROJECT=$(initRemoteRepository $GITLAB_URL $API_TOKEN $REPOSITORY)
    echo "Remote repository initialized identifier $PROJECT"
    echo "Add deploy key and enable write access to remote repository $REPOSITORY ($PROJECT)"
    response=$(enableRepositoryDeployKey $GITLAB_URL $API_TOKEN $PROJECT $DEPLOY_KEY_ID)
    response=$(setRepositoryWriteAccess $GITLAB_URL $API_TOKEN $PROJECT $DEPLOY_KEY_ID)
    echo "Add new remote url for repository $GITLAB_REPO"
    git remote add gitlab $GITLAB_REPO
    # push all branches
    IFS_BACK=$IFS
    IFS=$'\n'
    branches=$(git branch -r)
    for branchName in $branches; do
        trimBranchName=`echo $branchName | xargs`
        canonicalBranchName=$(getCanonicalBranchName $trimBranchName '/')
        echo "$trimBranchName ($canonicalBranchName) init push"
        git checkout -b $canonicalBranchName remotes/origin/$canonicalBranchName
        git push -f gitlab $canonicalBranchName
    done
    IFS=$IFS_BACK
    cd ..
    rm -r -f $REPOSITORY
    echo "====================  <$REPOSITORY>  ===================="
    echo ""
done < "$REPOSITORIES"

Exemplo de saída do console
====================  <project>  ====================
Run cloning remote repository git@skynet-uro.bank.srv:project
Cloning into 'project'...
remote: Counting objects: 62, done.
remote: Compressing objects: 100% (61/61), done.
remote: Total 62 (delta 21), reused 0 (delta 0)
Receiving objects: 100% (62/62), 15.57 KiB | 0 bytes/s, done.
Resolving deltas: 100% (21/21), done.
Current folder path: /app/migration/project
Initialize remote gitgab repository git@127.0.0.1:project.git
Remote repository initialized identifier 222
Enable deploy key write access to remote repository project (222)
Set write access to remote repository project (222)
Add new remote url for repository git@127.0.0.1:project.git
Push to new remote gitlab repository git@127.0.0.1:project.git
Counting objects: 55, done.
Delta compression using up to 2 threads.
Compressing objects: 100% (38/38), done.
Writing objects: 100% (55/55), 14.65 KiB | 0 bytes/s, done.
Total 55 (delta 18), reused 50 (delta 16)
To git@127.0.0.1:project.git
 * [new branch]      master -> master
<--- gitlab/master (master) init push
fatal: A branch named 'master' already exists.
Everything up-to-date
---> gitlab/master (master) success pushed
<--- origin/v0.0.0 (v0.0.0) init push
Branch v0.0.0 set up to track remote branch v0.0.0 from origin.
Switched to a new branch 'v0.0.0'
Total 0 (delta 0), reused 0 (delta 0)
remote:
remote: To create a merge request for v0.0.0, visit:
remote:   https://127.0.0.1:8082/project/merge_requests/new?merge_request%5Bsource_branch%5D=v0.0.0
remote:
To git@127.0.0.1:project.git
 * [new branch]      v0.0.0 -> v0.0.0
---> origin/v0.0.0 (v0.0.0) success pushed
<--- origin/v0.0.0-13 (v0.0.0-13) init push
Branch v0.0.0-13 set up to track remote branch v0.0.0-13 from origin.
Switched to a new branch 'v0.0.0-13'
Total 0 (delta 0), reused 0 (delta 0)
remote:
remote: To create a merge request for v0.0.0-13, visit:
remote:   https://127.0.0.1:8082/project/merge_requests/new?merge_request%5Bsource_branch%5D=v0.0.0-13
remote:
To git@127.0.0.1:project.git
 * [new branch]      v0.0.0-13 -> v0.0.0-13
---> origin/v0.0.0-13 (v0.0.0-13) success pushed
<--- origin/v0.0.0-15 (v0.0.0-15) init push
Branch v0.0.0-15 set up to track remote branch v0.0.0-15 from origin.
Switched to a new branch 'v0.0.0-15'
Total 0 (delta 0), reused 0 (delta 0)
remote:
remote: To create a merge request for v0.0.0-15, visit:
remote:   https://127.0.0.1:8082/project/merge_requests/new?merge_request%5Bsource_branch%5D=v0.0.0-15
remote:
To git@127.0.0.1:project.git
 * [new branch]      v0.0.0-15 -> v0.0.0-15
---> origin/v0.0.0-15 (v0.0.0-15) success pushed
<--- origin/v0.0.1 (v0.0.1) init push
Branch v0.0.1 set up to track remote branch v0.0.1 from origin.
Switched to a new branch 'v0.0.1'
Total 0 (delta 0), reused 0 (delta 0)
remote:
remote: To create a merge request for v0.0.1, visit:
remote:   https://127.0.0.1:8082/project/merge_requests/new?merge_request%5Bsource_branch%5D=v0.0.1
remote:
To git@127.0.0.1:project.git
 * [new branch]      v0.0.1 -> v0.0.1
---> origin/v0.0.1 (v0.0.1) success pushed
<--- origin/v0.0.1-11 (v0.0.1-11) init push
Branch v0.0.1-11 set up to track remote branch v0.0.1-11 from origin.
Switched to a new branch 'v0.0.1-11'
Total 0 (delta 0), reused 0 (delta 0)
remote:
remote: To create a merge request for v0.0.1-11, visit:
remote:   https://127.0.0.1:8082/project/merge_requests/new?merge_request%5Bsource_branch%5D=v0.0.1-11
remote:
To git@127.0.0.1:project.git
 * [new branch]      v0.0.1-11 -> v0.0.1-11
---> origin/v0.0.1-11 (v0.0.1-11) success pushed
<--- origin/v0.0.2 (v0.0.2) init push
Branch v0.0.2 set up to track remote branch v0.0.2 from origin.
Switched to a new branch 'v0.0.2'
Total 0 (delta 0), reused 0 (delta 0)
remote:
remote: To create a merge request for v0.0.2, visit:
remote:   https://127.0.0.1:8082/project/merge_requests/new?merge_request%5Bsource_branch%5D=v0.0.2
remote:
To git@127.0.0.1:project.git
 * [new branch]      v0.0.2 -> v0.0.2
---> origin/v0.0.2 (v0.0.2) success pushed
<--- origin/v0.0.3 (v0.0.3) init push
Branch v0.0.3 set up to track remote branch v0.0.3 from origin.
Switched to a new branch 'v0.0.3'
Counting objects: 7, done.
Delta compression using up to 2 threads.
Compressing objects: 100% (4/4), done.
Writing objects: 100% (4/4), 592 bytes | 0 bytes/s, done.
Total 4 (delta 3), reused 1 (delta 0)
remote:
remote: To create a merge request for v0.0.3, visit:
remote:   https://127.0.0.1:8082/project/merge_requests/new?merge_request%5Bsource_branch%5D=v0.0.3
remote:
To git@127.0.0.1:project.git
 * [new branch]      v0.0.3 -> v0.0.3
---> origin/v0.0.3 (v0.0.3) success pushed
====================  <project>  ====================

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