👶🏽 hello there my sweet runner

.dockerignore

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+dist
+node_modules
+.git
+./run-in-docker.sh
+Dockerfile
+dev.Dockerfile

.eslintignore

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+bin/*
+dist/*
+docs/*
+node_modules/*
+production_node_modules/*
+test/fixtures/*
+tmp/*
+jest.config.js

.eslintrc

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+{
+  "root": true,
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "project": "./tsconfig.json",
+    "ecmaVersion": 6,
+    "sourceType": "module",
+    "ecmaFeatures": {
+      "modules": true
+    }
+  },
+  "env": {
+    "es6": true,
+    "node": true
+  },
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/eslint-recommended",
+    "plugin:@typescript-eslint/recommended",
+    "prettier",
+    "plugin:import/errors",
+    "plugin:import/warnings",
+    "plugin:import/typescript"
+  ],
+  "rules": {
+    "@typescript-eslint/explicit-function-return-type": [
+      "warn",
+      {
+        "allowExpressions": false,
+        "allowTypedFunctionExpressions": true,
+        "allowHigherOrderFunctions": true
+      }
+    ],
+    "@typescript-eslint/explicit-member-accessibility": [
+      "warn",
+      {
+        "accessibility": "no-public",
+        "overrides": {
+          "accessors": "explicit",
+          "constructors": "no-public",
+          "methods": "explicit",
+          "properties": "explicit",
+          "parameterProperties": "off"
+        }
+      }
+    ],
+    "@typescript-eslint/no-inferrable-types": [
+      "error",
+      {
+        "ignoreParameters": true
+      }
+    ],
+    "@typescript-eslint/no-non-null-assertion": "off",
+    "@typescript-eslint/no-parameter-properties": [
+      "warn",
+      {
+        "allows": [
+          "private",
+          "protected",
+          "public",
+          "private readonly",
+          "protected readonly",
+          "public readonly"
+        ]
+      }
+    ],
+    "@typescript-eslint/no-unused-vars": "off",
+    "@typescript-eslint/no-use-before-define": [
+      "error",
+      {
+        "functions": false,
+        "typedefs": false
+      }
+    ],
+    "import/no-unresolved": "off"
+  }
+}

.gitattributes

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+* text=auto eol=lf

.github/CODEOWNERS

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+* @exercism/maintainers-admin

.github/workflows/ci.js.yml

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+# This workflow will do a clean install of node dependencies and run tests across different versions of node
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-nodejs-with-github-actions
+
+name: typescript-test-runner / master
+
+on:
+  push:
+    branches: [master]
+
+jobs:
+  precheck:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js LTS (14.x)
+        uses: actions/setup-node@v1
+        with:
+          node-version: 14.x
+
+      - name: Install project dependencies
+        run: yarn install --frozen-lockfile --ignore-scripts
+
+      - name: Run exercism/typescript-test-runner ci precheck (lint code)
+        run: bin/lint.sh
+
+  ci:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [12.x, 14.x, 15.x]
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Install project dependencies
+        run: yarn install --frozen-lockfile --ignore-scripts
+
+      - name: Build the test-runner (using Node ${{ matrix.node-version }})
+        run: bin/test.sh

.github/workflows/codeql.yml

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+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+name: 'codeql'
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [master]
+  schedule:
+    - cron: '0 14 * * 5'
+
+jobs:
+  analyze:
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        # Override automatic language detection by changing the below list
+        # Supported options are ['csharp', 'cpp', 'go', 'java', 'javascript', 'python']
+        language: ['javascript']
+        # Learn more...
+        # https://docs.github.com/en/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#overriding-automatic-language-detection
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      # Initializes the CodeQL tools for scanning.
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v1
+        with:
+          languages: ${{ matrix.language }}
+          # If you wish to specify custom queries, you can do so here or in a config file.
+          # By default, queries listed here will override any specified in a config file.
+          # Prefix the list here with "+" to use these queries and those in the config file.
+          # queries: ./path/to/local/query, your-org/your-repo/queries@main
+
+      # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+      # If this step fails, then you should remove it and run the build manually (see below)
+      - name: Autobuild
+        uses: github/codeql-action/autobuild@v1
+
+      # ℹ️ Command-line programs to run using the OS shell.
+      # 📚 https://git.io/JvXDl
+
+      # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
+      #    and modify them (or add more) to build your code if your project
+      #    uses a compiled language
+
+      #- run: |
+      #   make bootstrap
+      #   make release
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v1

.github/workflows/deploys.yml

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+name: typescript-test-runner / deploy
+
+on:
+  push:
+    branches: [main, master]
+
+jobs:
+  multiple-registries:
+    runs-on: ubuntu-latest
+
+    env:
+      ECR_REGISTRY: ${{ secrets.AWS_ACCOUNT_ID }}.dkr.ecr.${{ secrets.AWS_REGION }}.amazonaws.com
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@5a4ac9002d0be2fb38bd78e4b4dbde5606d7042f # 2.3.4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@154c24e1f33dbb5865a021c99f1318cfebf27b32 # 1.1.1
+
+      - name: Cache Docker layers
+        uses: actions/cache@0781355a23dac32fd3bac414512f4b903437991a # 2.1.3
+        with:
+          path: /tmp/.buildx-cache
+          key: ${{ runner.os }}-buildx-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-buildx-
+
+      - name: Login to DockerHub
+        uses: docker/login-action@f3364599c6aa293cdc2b8391b1b56d0c30e45c8a # 1.8.0
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_PASSWORD }}
+
+      - name: Login to ECR
+        uses: docker/login-action@f3364599c6aa293cdc2b8391b1b56d0c30e45c8a # 1.8.0
+        with:
+          registry: ${{ env.ECR_REGISTRY }}
+          username: ${{ secrets.AWS_ECR_ACCESS_KEY_ID }}
+          password: ${{ secrets.AWS_ECR_SECRET_ACCESS_KEY }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@0db984c1826869dcd0740ff26ff75ff543238fd9 # 2.2.2
+        with:
+          context: .
+          file: ./Dockerfile
+          push: true
+          tags: |
+            ${{ github.event.repository.full_name }}:latest
+            ${{ github.event.repository.full_name }}:${{ github.sha }}
+            ${{ env.ECR_REGISTRY }}/${{ github.event.repository.name }}:production
+            ${{ env.ECR_REGISTRY }}/${{ github.event.repository.name }}:${{ github.sha }}
+          cache-from: type=local,src=/tmp/.buildx-cache
+          cache-to: type=local,dest=/tmp/.buildx-cache

.github/workflows/format-code.yml

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+name: 'Format code'
+
+on:
+  issue_comment:
+    types: [created]
+
+jobs:
+  format:
+    name: 'Format code'
+    runs-on: ubuntu-latest
+    if: github.event.issue.pull_request != '' && contains(github.event.comment.body, '/format')
+    steps:
+      - name: 'Post acknowledgement that it will format code'
+        continue-on-error: true # Never fail the build if this fails
+        uses: actions/github-script@6e5ee1dc1cb3740e5e5e76ad668e3f526edbfe45 # 2.0.0
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          script: |
+            github.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: 'The "Format code" action has started running.'
+            })
+
+      - name: 'Download PR data'
+        run: |
+          PR_DATA="/tmp/pr.json"
+
+          jq -r ".issue.pull_request.url" "$GITHUB_EVENT_PATH" | \
+            xargs curl --header 'authorization: Bearer ${{ secrets.GITHUB_TOKEN }}' -o "$PR_DATA" --url
+
+      - name: 'Check fork status'
+        id: fork_status
+        run: |
+          IS_FORK="$(jq '.head.repo.fork' "/tmp/pr.json")"
+          echo "::set-output name=fork::$IS_FORK"
+
+      - name: 'Setup SSH deploy key'
+        if: steps.fork_status.outputs.fork == 'false'
+        run: |
+          mkdir ~/.ssh
+          echo "${{ secrets.DEPLOY_KEY }}" > ~/.ssh/id_ed25519
+          chmod 600 ~/.ssh/id_ed25519
+
+      - name: 'Checkout code'
+        run: |
+          PR_DATA="/tmp/pr.json"
+
+          HEAD_REF=$(jq -r ".head.ref" "$PR_DATA")
+
+          if [ ${{ steps.fork_status.outputs.fork }} == "false" ]; then
+            echo "::debug::Setting up repo using SSH"
+            HEAD_REPO=$(jq -r '.head.repo.ssh_url' "$PR_DATA")
+          else
+            echo "::debug::Setting up repo using HTTPS"
+            HEAD_REPO=$(jq -r '.head.repo.clone_url | sub("https://"; "https://x-access-token:${{ secrets.GITHUB_TOKEN }}@")' "$PR_DATA")
+          fi
+
+          git clone $HEAD_REPO .
+          git checkout -b "$HEAD_REF" "origin/$HEAD_REF"
+
+      - name: 'Format code'
+        run: ./bin/format.sh
+        env:
+          EXERCISM_PRETTIER_VERSION: '2.2.1'
+
+      - name: 'Commit formatted code'
+        run: |
+          # Check if there is nothing to commit (i.e. no formatting changes made)
+          if [ -z "$(git status --porcelain)" ]; then
+            echo "Code is already formatted correctly"
+            exit 0
+          fi
+
+          # Setup the git user (required to commit anything)
+          git config --global user.email "github-actions[bot]@users.noreply.github.com"
+          git config --global user.name "github-actions[bot]"
+
+          # Commit the changes made by prettier
+          git add .
+          git commit -m "[CI] Format code"
+          git push
+
+      - name: 'Post acknowledgement that it has formatted the code'
+        continue-on-error: true # Never fail the build if this fails
+        uses: actions/github-script@6e5ee1dc1cb3740e5e5e76ad668e3f526edbfe45 # 2.0.0
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          script: |
+            github.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: 'The "Format code" action has finished running.'
+            })
+
+      - name: 'Post reminder to trigger build manually'
+        continue-on-error: true # Never fail the build if this fails
+        if: steps.fork_status.outputs.fork == 'true'
+        uses: actions/github-script@6e5ee1dc1cb3740e5e5e76ad668e3f526edbfe45 # 2.0.0
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          script: |
+            github.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: 'For security reasons, `/format` does not trigger CI builds when the PR has been submitted from a fork. If checks were not passing due to code format, trigger a build to make the required checks pass, through one of the following ways:\n\n- Push an empty commit to this branch: `git commit --allow-empty -m "Trigger builds"`.\n- Close and reopen the PR.\n- Push a regular commit to this branch.'
+            })