GitLab to CodeCommit code mirroring template

gitlab-mirroring-template.yaml

AWSTemplateFormatVersion: 2010-09-09

Description: |
  Gitlab mirroring to AWS CodeCommit

Parameters:
  CreateCodeCommitRepository:
    Description: Would you like to create a new CodeCommit repository?
    Type: String
    Default: 'create-new'
    AllowedValues: ['create-new', 'use-existing']
  CodeCommitRepositoryName:
    Type: String
    Description: The name of the CodeCommit repository that will be the target for mirroring. (This will be created for you if you choose it)
  IamUserName:
    Type: String
    Default: aws-gitlab-mirroring
    Description: IAM user's name that will be created for you to connect GitLab to your AWS account.

Metadata:
  AWS::CloudFormation::Interface:
    ParameterGroups:
      - Label:
          default: IAM User settings
        Parameters:
          - IamUserName
      - Label:
          default: Repository settings
        Parameters:
          - CreateCodeCommitRepository
          - CodeCommitRepositoryName
          - CreateCodeCommitRepositoryDeletionPolicy

Conditions:
  ShouldCreateCodeCommitRepository: !Equals [!Ref CreateCodeCommitRepository, 'create-new']

Resources:
  # the IAM user that will be used to pull/push the CodeCommit repository
  IAMUser:
    Type: AWS::IAM::User
    Properties: 
      UserName: !Sub ${IamUserName}
      Path: '/'
      Policies: 
        - PolicyName: !Sub "${IamUserName}-iam-user-policy"
          PolicyDocument:
            Version: '2012-10-17'
            Statement:
              - Effect: 'Allow'
                Action:
                  - 'codecommit:GitPull'
                  - 'codecommit:GitPush'
                Resource:
                  - !Sub 'arn:aws:codecommit:${AWS::Region}:${AWS::AccountId}:${CodeCommitRepositoryName}'
  # Optional creation of the CodeCommit repository
  CodeCommitRepository:
    Type: AWS::CodeCommit::Repository
    Condition: ShouldCreateCodeCommitRepository
    DeletionPolicy: Delete # Set this to "Retain" to keep the repository once the CloudFormation stack is deleted.
    Properties: 
      RepositoryDescription: Mirrored repository from Gitlab.
      RepositoryName: !Sub ${CodeCommitRepositoryName}

Outputs:
  IAMUserDetails:
    Description: URL of the page where you should create the HTTPS Git credentials for AWS CodeCommit
    Value: !Sub "https://console.aws.amazon.com/iam/home?region=${AWS::Region}#/users/${IamUserName}?section=security_credentials"
  GitRepositoryURL:
    Description: URL for Gitlab. The username (the part before the @ character) might need to be changed. Please, check it when you create the user in the next step
    Value: !Sub "https://${IamUserName}-at-${AWS::AccountId}@git-codecommit.${AWS::Region}.amazonaws.com/v1/repos/${CodeCommitRepositoryName}"