GitLab Clean Up a Merged Branch

arazzo: 1.0.1
info:
  title: GitLab Clean Up a Merged Branch
  summary: Verify a branch has been merged, then unprotect and delete it.
  description: >-
    A post-merge housekeeping flow. The workflow inspects a branch and only
    proceeds when it is flagged as merged; it then unprotects the branch so it
    can be removed and deletes it. When the branch is not yet merged the flow
    ends without deleting anything. Every step spells out its request inline so
    the flow can be read and executed without opening the underlying OpenAPI
    description.
  version: 1.0.0
sourceDescriptions:
- name: gitlabProjectsApi
  url: ../openapi/gitlab-api-v4-projects-openapi-original.yml
  type: openapi
workflows:
- workflowId: cleanup-merged-branch
  summary: Delete a branch only after confirming it has been merged.
  description: >-
    Reads the branch to confirm its merged flag, branches on the result, and for
    merged branches unprotects then deletes them.
  inputs:
    type: object
    required:
    - privateToken
    - projectId
    - branch
    properties:
      privateToken:
        type: string
        description: GitLab Private-Token used to authenticate the API calls.
      projectId:
        type: string
        description: The ID or URL-encoded path of the project.
      branch:
        type: string
        description: The branch name to clean up.
  steps:
  - stepId: getBranch
    description: Read the branch and capture whether it has been merged.
    operationId: getApiV4ProjectsIdRepositoryBranchesBranch
    parameters:
    - name: Private-Token
      in: header
      value: $inputs.privateToken
    - name: id
      in: path
      value: $inputs.projectId
    - name: branch
      in: path
      value: $inputs.branch
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      merged: $response.body#/merged
      protected: $response.body#/protected
    onSuccess:
    - name: isMerged
      type: goto
      stepId: unprotectBranch
      criteria:
      - context: $response.body
        condition: $.merged == true
        type: jsonpath
    - name: notMerged
      type: end
      criteria:
      - context: $response.body
        condition: $.merged == false
        type: jsonpath
  - stepId: unprotectBranch
    description: Unprotect the branch so it can be deleted.
    operationId: putApiV4ProjectsIdRepositoryBranchesBranchUnprotect
    parameters:
    - name: Private-Token
      in: header
      value: $inputs.privateToken
    - name: id
      in: path
      value: $inputs.projectId
    - name: branch
      in: path
      value: $inputs.branch
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      unprotectedBranch: $response.body#/name
  - stepId: deleteBranch
    description: Delete the now-unprotected, merged branch.
    operationId: deleteApiV4ProjectsIdRepositoryBranchesBranch
    parameters:
    - name: Private-Token
      in: header
      value: $inputs.privateToken
    - name: id
      in: path
      value: $inputs.projectId
    - name: branch
      in: path
      value: $inputs.branch
    successCriteria:
    - condition: $statusCode == 204
  outputs:
    deletedBranch: $steps.unprotectBranch.outputs.unprotectedBranch