preview-deployment.yml

name: PR Preview Deployment
on:
  pull_request:
    types: [opened, synchronize, reopened]

jobs:
  build_and_deploy:
    # do not run in forks
    if: github.event.pull_request.head.repo.full_name == github.repository
    runs-on: ubuntu-latest
    concurrency:
      group: ${{ github.ref }}
      cancel-in-progress: true

    steps:
      - uses: actions/checkout@v3
        with:
          fetch-depth: 0
      - uses: actions/setup-node@v3
        with:
          node-version: 16
      - uses: actions/github-script@v6
        with:
          script: |
            const comments = require('./.github/workflows/scripts/comments.js');
            const maybeComment = await comments.get(context, github);
            if (maybeComment) {
              await comments.update(context, github, maybeComment.id,  `🤖 Your PR preview is being built...`);
            } else {
              await comments.create(context, github, `🤖 Your PR preview is being built...`);
            }
      - uses: actions/setup-python@v4
        with:
          python-version: "3.10"

      - name: Install DFX
        run: sh -ci "$(curl -fsSL https://internetcomputer.org/install.sh)"

      - name: "Build & Deploy"
        run: |
          mkdir -p ~/.config/dfx/identity/default

          echo $DFX_IDENTITY_PREVIEW | base64 -d > ~/.config/dfx/identity/default/identity.pem
          sed -i 's/\\r\\n/\r\n/g' ~/.config/dfx/identity/default/identity.pem

          # check pool canister balance and send notification if it's under 5TC
          balance=$(dfx canister --network ic status $POOL_CANISTER_ID 2>&1 >/dev/null | grep Balance: | sed 's/[^0-9]//g')
          LANG=en_US.UTF-8
          balance_formatted=$(echo $balance | awk '{printf "%'\''d\n", $0}')
          echo "Pool balance: $balance_formatted"
          if [ "5000000000000" -gt "$balance" ]; then
            template="{ \"channel\": \"C04EGHHU9U2\", \"blocks\": [ { \"type\": \"section\", \"text\": { \"type\": \"mrkdwn\", \"text\": \"@channel Preview pool canister \`$POOL_CANISTER_ID\` balance is \`$balance_formatted\`.\n\nTop it up by\n- running \`dfx ledger --network ic top-up $POOL_CANISTER_ID --amount 5.0\`\n- or by adding the canister on the NNS and sending cycles to it.\" } } ]}"
            curl --data "$template" -H "Content-type: application/json"  -H "Authorization: Bearer $SLACK_TOKEN" -X POST https://slack.com/api/chat.postMessage -o /dev/null
          fi

          # request preview canister from the pool
          pull_number=$(jq --raw-output .pull_request.number "$GITHUB_EVENT_PATH")
          pip install ic-py
          canister_id=$(python3 .github/workflows/scripts/request-canister.py $pull_number)

          # overwrite canister id in dfx.json
          echo "{\"portal\":{\"ic\":\"$canister_id\"}}" > canister_ids.json

          echo "PREVIEW_CANISTER_ID=$canister_id" >> $GITHUB_ENV

          # install and deploy
          git submodule update --init
          npm install

          export PREVIEW_CANISTER_ID=$canister_id

          dfx deploy --network=ic --no-wallet portal --yes

        env:
          DFX_IDENTITY_PREVIEW: ${{ secrets.DFX_IDENTITY_PREVIEW }}
          POOL_CANISTER_ID: ${{ secrets.POOL_CANISTER_ID }}
          CONTENTFUL_ACCESS_TOKEN: ${{ secrets.CONTENTFUL_ACCESS_TOKEN }}
          CONTENTFUL_HOST: ${{ secrets.CONTENTFUL_HOST }}
          CONTENTFUL_SPACE_ID: ${{ secrets.CONTENTFUL_SPACE_ID }}
          SLACK_TOKEN: ${{ secrets.SLACK_TOKEN }}

      - name: Report build error
        uses: actions/github-script@v6
        if: ${{ failure() }}
        with:
          script: |
            const comments = require('./.github/workflows/scripts/comments.js');
            const maybeComment = await comments.get(context, github);
            if (maybeComment) {
              await comments.update(context, github, maybeComment.id,  `🤖 Preview build failed.`);
            } else {
              await comments.create(context, github, `🤖 Preview build failed.`);
            }

      - uses: actions/github-script@v6
        with:
          script: |
            const comments = require('./.github/workflows/scripts/comments.js');
            const maybeComment = await comments.get(context, github);
            if (maybeComment) {
              await comments.update(context, github, maybeComment.id,  `🤖 Here's your preview: https://${process.env.PREVIEW_CANISTER_ID}.ic0.app`);
            } else {
              await comments.create(context, github, `🤖 Here's your preview: https://${process.env.PREVIEW_CANISTER_ID}.ic0.app`);
            }