github-action/action.yml

name: "ZeroTier"
description: "Connect your Github Action workflow to ZeroTier"
branding:
  icon: 'globe'
  color: 'gray-dark'

on:
  workflow_call:

inputs:
  network_id:
    description: "The ZeroTier network ID to connect to"
    required: true
  auth_token:
    description: "Your ZeroTier Central API Access Token"
    required: true
  api_url:
    description: "ZeroTier Central API URL"
    required: false
    default: "https://my.zerotier.com/api/v1"

runs:
  using: 'composite'
  steps:
    - name: zerotier
      uses: zerotier/github-action/util/post@main
      with:
        main: |
          set -euo pipefail
          IFS=$'\n\t'

          echo "⏁  Installing ZeroTier"

          case $(uname -s) in
            MINGW64_NT?*)
              pwsh "${{ github.action_path }}/util/install.ps1"
              ztcli="/c/Program Files (x86)/ZeroTier/One/zerotier-cli.bat"
              member_id=$("${ztcli}" info | awk '{ print $3 }')
              ;;
            *)
              . ${{ github.action_path }}/util/install.sh &>/dev/null
              member_id=$(sudo zerotier-cli info | awk '{ print $3 }')
            ;;
          esac

          echo "⏁  Authorizing Runner to ZeroTier network"
          MAX_RETRIES=10
          RETRY_COUNT=0
          
          while ! curl -s -X POST \
          -H "Authorization: token ${{ inputs.auth_token }}" \
          -H "Content-Type: application/json" \
          -d '{"name":"Zerotier GitHub Member '"${GITHUB_SHA::7}"'", "description": "Member created by '"${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}/actions/runs/${GITHUB_RUN_ID}"'", "config":{"authorized":true}}' \
          "${{ inputs.api_url }}/network/${{ inputs.network_id }}/member/${member_id}" | grep '"authorized":true'; 
          do 
              RETRY_COUNT=$((RETRY_COUNT+1))
              
              if [ $RETRY_COUNT -ge $MAX_RETRIES ]; then
                  echo "Reached maximum number of retries ($MAX_RETRIES). Exiting..."
                  exit 1
              fi
          
              echo "Authorization failed. Retrying in 2 seconds... (Attempt $RETRY_COUNT of $MAX_RETRIES)"
              sleep 2
          done
          
          echo "Member authorized successfully."
          echo "⏁  Joining ZeroTier Network ID: ${{ inputs.network_id }}"
          case $(uname -s) in
            MINGW64_NT?*)
              "${ztcli}" join ${{ inputs.network_id }}
              while ! "${ztcli}" listnetworks | grep ${{ inputs.network_id }} | grep OK ; do sleep 0.5 ; done
              ;;
            *)
              sudo zerotier-cli join ${{ inputs.network_id }}
              while ! sudo zerotier-cli listnetworks | grep ${{ inputs.network_id }} | grep OK ; do sleep 0.5 ; done
              ;;
          esac

        post: |
          set -euo pipefail
          IFS=$'\n\t'

          case $(uname -s) in
            MINGW64_NT?*)
              ztcli="/c/Program Files (x86)/ZeroTier/One/zerotier-cli.bat"
              member_id=$("${ztcli}" info | awk '{ print $3 }')
              ;;
            *)
              member_id=$(sudo zerotier-cli info | awk '{ print $3 }')
            ;;
          esac

          echo "⏁  Removing Runner from ZeroTier network"
          curl -i -s -X DELETE -H "Authorization: token ${{ inputs.auth_token }}" "${{ inputs.api_url }}/network/${{ inputs.network_id }}/member/${member_id}" > /tmp/api_delete_output.txt
          STATUS_CODE=$(cat /tmp/api_delete_output.txt | grep 'HTTP/' | awk '{print $2}')

          if [[ $STATUS_CODE -ge 400 && $STATUS_CODE -le 599 ]]; then
              echo "ERROR: Status code: $STATUS_CODE"
              echo -e "Complete server response:\n$(cat /tmp/api_delete_output.txt)\n"
              exit $STATUS_CODE
          else
              echo "Success! Status code: $STATUS_CODE"
              exit 0
          fi