GitHub Commit a File to a New Branch

arazzo: 1.0.1
info:
  title: GitHub Commit a File to a New Branch
  summary: Branch off the default branch and commit a new file to that branch.
  description: >-
    The foundational write pattern for proposing a change. The workflow reads
    the SHA of the base branch reference, creates a new branch reference
    pointing at that SHA, and then creates a file on the new branch in a single
    commit. 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: githubReposApi
  url: ../openapi/github-repos-api-openapi.yml
  type: openapi
workflows:
- workflowId: commit-file-to-new-branch
  summary: Create a branch from a base ref and commit a file to it.
  description: >-
    Resolves the base branch SHA, creates a new branch reference from it, and
    commits a new file onto the branch.
  inputs:
    type: object
    required:
    - githubToken
    - owner
    - repo
    - baseBranch
    - newBranch
    - path
    - message
    - contentBase64
    properties:
      githubToken:
        type: string
        description: A GitHub token with repo scope, passed as a Bearer credential.
      owner:
        type: string
        description: The account owner of the repository.
      repo:
        type: string
        description: The name of the repository.
      baseBranch:
        type: string
        description: The base branch name to branch from (e.g. main), without the heads/ prefix.
      newBranch:
        type: string
        description: The new branch name to create, without the heads/ prefix.
      path:
        type: string
        description: The repository path of the file to create.
      message:
        type: string
        description: The commit message.
      contentBase64:
        type: string
        description: The new file content, Base64 encoded.
  steps:
  - stepId: getBaseRef
    description: >-
      Read the base branch reference to obtain the commit SHA the new branch
      will point at.
    operationId: getReference
    parameters:
    - name: Authorization
      in: header
      value: Bearer $inputs.githubToken
    - name: owner
      in: path
      value: $inputs.owner
    - name: repo
      in: path
      value: $inputs.repo
    - name: ref
      in: path
      value: "heads/$inputs.baseBranch"
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      baseSha: $response.body#/object/sha
  - stepId: createBranchRef
    description: >-
      Create the new branch reference pointing at the base commit SHA returned
      by the previous step.
    operationId: createReference
    parameters:
    - name: Authorization
      in: header
      value: Bearer $inputs.githubToken
    - name: owner
      in: path
      value: $inputs.owner
    - name: repo
      in: path
      value: $inputs.repo
    requestBody:
      contentType: application/json
      payload:
        ref: "refs/heads/$inputs.newBranch"
        sha: $steps.getBaseRef.outputs.baseSha
    successCriteria:
    - condition: $statusCode == 201
    outputs:
      newRef: $response.body#/ref
  - stepId: commitFile
    description: Create the file on the new branch in a single commit.
    operationId: createOrUpdateFileContents
    parameters:
    - name: Authorization
      in: header
      value: Bearer $inputs.githubToken
    - name: owner
      in: path
      value: $inputs.owner
    - name: repo
      in: path
      value: $inputs.repo
    - name: path
      in: path
      value: $inputs.path
    requestBody:
      contentType: application/json
      payload:
        message: $inputs.message
        content: $inputs.contentBase64
        branch: $inputs.newBranch
    successCriteria:
    - condition: $statusCode == 201
    outputs:
      commitSha: $response.body#/commit/sha
      contentUrl: $response.body#/content/html_url
  outputs:
    newRef: $steps.createBranchRef.outputs.newRef
    commitSha: $steps.commitFile.outputs.commitSha
    contentUrl: $steps.commitFile.outputs.contentUrl