infra: theme preview gh action (#296)

name: Theme preview

on:

  pull_request:

    types: [opened, synchronize, reopened]

    branches:

      - master

      - theme-preview-script

    paths:

      - "themes/index.js"

jobs:

  build:

    runs-on: ubuntu-latest

    steps:

      - uses: actions/checkout@v1

      - name: setup node

        uses: actions/setup-node@v1

        with:

          node-version: "12.x"

      - name: npm install, preview theme

        run: |

          npm install

          npm run preview-theme

        env:

          CI: true

          PERSONAL_TOKEN: ${{ secrets.PERSONAL_TOKEN }}

  "scripts": {

    "test": "jest --coverage",

    "test:watch": "jest --watch",

    "theme-readme-gen": "node scripts/generate-theme-doc"

    "theme-readme-gen": "node scripts/generate-theme-doc",

    "preview-theme": "node scripts/preview-theme"

  },

  "author": "Anurag Hazra",

  "license": "MIT",

  "devDependencies": {

    "@actions/core": "^1.2.4",

    "@actions/github": "^4.0.0",

    "@testing-library/dom": "^7.20.0",

    "@testing-library/jest-dom": "^5.11.0",

    "axios": "^0.19.2",

    "axios-mock-adapter": "^1.18.1",

    "css-to-object": "^1.1.0",

    "husky": "^4.2.5",

    "jest": "^26.1.0"

    "jest": "^26.1.0",

    "parse-diff": "^0.7.0"

  },

  "dependencies": {

    "dotenv": "^8.2.0",

const core = require("@actions/core");

const github = require("@actions/github");

const parse = require("parse-diff");

require("dotenv").config();

const parsePullRequestId = (githubRef) => {

  const result = /refs\/pull\/(\d+)\/merge/g.exec(githubRef);

  if (!result) {

    console.log("Reference not found.");

    return 297;

  }

  const [, pullRequestId] = result;

  return pullRequestId;

};

async function run() {

  try {

    const octokit = github.getOctokit(process.env.PERSONAL_TOKEN);

    const pullRequestId = parsePullRequestId(process.env.GITHUB_REF);

    let res = await octokit.pulls.get({

      owner: "anuraghazra",

      repo: "github-readme-stats",

      pull_number: pullRequestId,

      mediaType: {

        format: "diff",

      },

    });

    let diff = parse(res.data);

    let colorStrings = diff

      .find((file) => file.to === "themes/index.js")

      .chunks[0].changes.filter((c) => c.type === "add")

      .map((c) => c.content.replace("+", ""))

      .join("");

    let matches = colorStrings.match(/(title_color:.*bg_color.*\")/);

    let colors = matches && matches[0].split(",");

    if (!colors) {

      await octokit.issues.createComment({

        owner: "anuraghazra",

        repo: "github-readme-stats",

        body: `

        \rTheme preview (bot)

        Cannot create theme preview

        `,

        issue_number: pullRequestId,

      });

      return;

    }

    colors = colors.map((color) =>

      color.replace(/.*\:\s/, "").replace(/\"/g, "")

    );

    let titleColor = colors[0];

    let iconColor = colors[1];

    let textColor = colors[2];

    let bgColor = colors[3];

    const url = `https://github-readme-stats.vercel.app/api?username=anuraghazra&title_color=${titleColor}&icon_color=${iconColor}&text_color=${textColor}&bg_color=${bgColor}&show_icons=true`;

    await octokit.issues.createComment({

      owner: "anuraghazra",

      repo: "github-readme-stats",

      body: `

      \rTheme preview (bot)  

      \r![](${url})

      `,

      issue_number: pullRequestId,

    });

  } catch (error) {

    core.setFailed(error.message);

  }

}

run();