CircleCI hack for scheduled workflows that fail with unauthorized status

config.yml

# This is an example hack for scheduled CircleCI workflows that fail with the status "unauthorized" when
# using a context is configured with any security group other than "all members"

# How to use:
#  - Create a CircleCI token and add it to the project environment variables with the name CIRCLE_TOKEN
#  - Create a context called "hello" and restrict the security to a specific group. Remove "all members"
# The trigger_job workflow will run daily as the CircleCI system to use your CIRCLE_TOKEN with the API
# to trigger the actual job you want to run. That job will then have access to the context because it
# was executed with your token.

version: 2.1

executors:
  default:
    docker:
      - image: cimg/base:2020.01

parameters:
  run_workflow_trigger:
    description: An internal flag to conditionally run the triggered workflow
    type: boolean
    default: false
  run_workflow_base:
    description: An internal flag to conditionally run the base workflow
    type: boolean
    default: true

jobs:
  hello-world:
    executor: default
    steps:
      - run:
          command: echo "Hello World"
  scheduled-hello-world:
    executor: default
    steps:
      - run:
          command: echo "A Scheduled Hello World"
  trigger-job:
    description: Trigger a workflow using the CircleCI API to get around secured context issues
    executor: default
    steps:
      - run:
          name: Trigger Tests
          command: |
            curl --request POST \
              --url https://circleci.com/api/v2/project/github/$CIRCLE_PROJECT_USERNAME/$CIRCLE_PROJECT_REPONAME/pipeline \
              --header "Circle-Token: $CIRCLE_TOKEN" \
              --header 'content-type: application/json' \
              --data '{"branch":"'$CIRCLE_BRANCH'","parameters":{"run_workflow_trigger":true, "run_workflow_base":false}}' 

workflows:
  hello:
    when: << pipeline.parameters.run_workflow_base >>
    jobs:
      - hello-world:
          context: hello
  scheduled:
    when: << pipeline.parameters.run_workflow_trigger >>
    jobs:
      - scheduled-hello-world:
          context: hello
  
  trigger_job:
    description: A scheduled workflow to run daily
    triggers:
      - schedule:
          cron: "0 14 * * *"
          filters:
            branches:
              only:
                - master
    jobs:
      - trigger-job