Concourse CI Web Application Version Resource

Implements a resource that passes to a task the version and different meta data. Can be used to trigger a job based on specified version field change.

Source Configuration

Parameters

• url: Required. URL which produces version info in one of the JSON/XML/TEXT formats.

• version_field: Optional. in general. Required if response is JSON/XML. The level is separated by :: 2 colons.

{
  "version_info" : {
    "git" : {
      "version" : "2a3b4e",
      "branch" : "release",
      "tag" : "v1.1.1",
      "url" : "https://github.com/aedavelli/appver-resource"
    }
  }
}

version_info::git::version can be used as version_field. All concrete fields under version_info.git will be produced as metadata

• accept: Optional. in general. If not present defaults to application/json

• username: Optional. in general. Used for basic auth if the URL is protected.

• password: Optional. in general. Used for basic auth if the URL is protected.

Example

resource_types:
  - name: appver
    type: docker-image
    source:
      repository: avsr/appver-resource

resources:
  - name: appver
    type: appver
    source:
      url: http://192.168.1.13:8282/version
      version_field: "version_info::git::version"
      accept: "application/json"
      username: ((webapp.username))
      password: ((webapp.password))
      insecure: true
      redact: true


jobs:
- name: some-job
  plan:
  - get: appver
    trigger: true
  - task: version-changed-task
    config:
      platform: linux
      image_resource:
        type: docker-image
        source: {repository: busybox}
      # appver directory contains key(filename), value(data inside file)
      inputs:
        - name: appver
      run:
        # do your work here

Behavior

check: Check for latest version

When no version/latest version specified, latest version will be returned. If old version specified in request, both old and latest versions will be returned.

in: Write the metadata to the destination dir

For above mentioned json response below files and content in appver directory

File	Content
appver/version	2a3b4e
appver/branch	release
appver/tag	v1.1.1
appver/url	https://github.com/aedavelli/appver-resource

Parameters

None.

out: Unused

Unused

Parameters

None.

Use in a task

version=`cat "${ROOT_FOLDER}/appver/version"`
echo "Using web APP with version $version"

Development

Prerequisites

• golang is required - version 1.14.x is tested; earlier versions may also work.
• docker is required - version 17.06.x is tested; earlier versions may also work.

Running the tests

go test -v github.com/aedavelli/appver-resource/... -ginkgo.v

The tests have been embedded with the Dockerfile; ensuring that the testing environment is consistent across any docker enabled platform. When the docker image builds, the test are run inside the docker container, on failure they will stop the build.

Run the tests with the following command:

docker build -t appver-resource .

Contributing

Please make all pull requests to the master branch and ensure tests pass locally.