viglesiasce / pullrequest-resource

Provides a pull request resource for concourse CI.

Github Pull Request Resource

Tracks pull requests made to a particular github repo. In the spirit of Travis CI, a status of pending, success, or failure will be set on the pull request, which must be explicitly defined in your pipeline.

Deploying to Concourse

You can use the docker image by defining the resource type in your pipeline YAML.

For example:

resource_types:
- name: pull-request
  type: docker-image
  source:
    repository: jtarchie/pr

Source Configuration

• repo: Required. The repo name on github. Example: jtarchie/pullrequest-resource

• access_token: Required. An access token with repo:status access is required for public repos. An access tocken with repo access is required for private repos.

• uri: Optional. The URI to the github repo. By default, it assumes https://github.com/`repo`.

• base: Optional. When set, will only pull PRs made against a specific branch. The default behaviour is any branch.

• base_url: Optional The base URL for the Concourse deployment, used for linking to builds. On newer versions of Concourse ( >= v0.71.0) , the resource will automatically sets the URL.

• private_key: Optional. Private key to use when pulling/pushing. Example:

  private_key: |
    -----BEGIN RSA PRIVATE KEY-----
    MIIEowIBAAKCAQEAtCS10/f7W7lkQaSgD/mVeaSOvSF9ql4hf/zfMwfVGgHWjj+W
    <Lots more text>
    DWiJL+OFeg9kawcUL6hQ8JeXPhlImG6RTUffma9+iGQyyBMCGd1l
    -----END RSA PRIVATE KEY-----
  

• api_endpoint: Optional. If the repository is located on a GitHub Enterprise instance you need to specify the base api endpoint (e.g. "https://<hostname>/api/v3/").

• every: Optional If set to true, it will override the check step so every pull request can be iterated through, without relying on a status being on it. This feature should only be used in concourse version 1.2.x and higher and the version: every.

• username: Optional. Username for HTTP(S) auth when pulling/pushing. This is needed when only HTTP/HTTPS protocol for git is available (which does not support private key auth) and auth is required.

• password: Optional. Password for HTTP(S) auth when pulling/pushing.

• skip_ssl_verification: Optional. Skips git ssl verification by exporting GIT_SSL_NO_VERIFY=true.

• git_config: Optional. If specified as (list of pairs name and value) it will configure git global options, setting each name with each value.

  This can be useful to set options like credential.helper or similar.

  See the git-config(1) manual page for more information and documentation of existing git options.

Behavior

check: Check for new pull requests

Concourse resources always iterate over the latest version. This maps well to semver and git, but not with pull requests. To find the latests pull requests, check queries for all PRs, selects only PRs without concourse-ci status messages, and then only returns the oldest one from list.

To ensure that check can iterate over all PRs, you must explicitly define an out for the PR.

in: Clone the repository, at the given pull request ref

Clones the repository to the destination, and locks it down to a given ref.

Submodules are initialized and updated recursively, there is no option to to disable that, currently.

There is git config information set on the repo about the PR, which can be consumed within your tasks.

For example:

git config --get pullrequest.url    # returns the URL to the pull request
git config --get pullrequest.branch # returns the branch name used for the pull request
git config --get pullrequest.id     # returns the ID number of the PR

Parameters

• fetch_merge: Optional. If set to true, it will fetch what the result of PR would be otherwise it will fetch the origin branch. Defaults to false.

out: Update the status of a pull request

Set the status message for concourse-ci context on specified pull request.

Parameters

• path: Required. The path of the repository to reference the pull request.

• status: Required. The status of success, failure, error, or pending.

  • on_success and on_falure triggers may be useful for you when you wanted to reflect build result to the PR (see the example below).

• context: Optional. The context on the specified pull request (defaults to status). Any context will be prepended with concourse-ci, so a context of unit-tests will appear as concourse-ci/unit-tests on Github.

• comment: Optional. The file path of the comment message. Comment owner is same with the owner of access_token.

Example pipeline

This is what I am currently using to test this resource on Concourse.

resource_types:
- name: pull-request
  type: docker-image
  source:
    repository: jtarchie/pr
resources:
- name: repo
  type: pull-request
  source:
    access_token: access_token
    private_key: |
      -----BEGIN RSA PRIVATE KEY-----
      My private key.
      -----END RSA PRIVATE KEY-----
    repo: jtarchie/pullrequest-resource
jobs:
- name: test pull request
  plan:
  - get: repo
    trigger: true
  - put: repo
    params:
      path: repo
      status: pending
  - task: do something with git
    config:
      platform: linux
      image: docker:///concourse/git-resource
      run:
        path: sh
        args:
        - -c
        - cd repo && git --no-pager show
      inputs:
      - name: repo
        path: ""
    on_success:
      put: repo
      params:
        path: repo
        status: success
    on_failure:
      put: repo
      params:
        path: repo
        status: failure

Tests

Tests can be run two ways, for local feedback and to see how it will run on the resource container.

1. Local, requires ruby

gem install bundler
bundle install
bundle exec rspec

1. Container, requires requires ruby and docker

gem install bundler
bundle install
rake test