Add initial structure

.eslintignore

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+dist/
+lib/
+node_modules/

.eslintrc.json

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+{
+    "plugins": ["jest", "@typescript-eslint"],
+    "extends": ["plugin:github/es6"],
+    "parser": "@typescript-eslint/parser",
+    "parserOptions": {
+      "ecmaVersion": 9,
+      "sourceType": "module",
+      "project": "./tsconfig.json"
+    },
+    "env": {
+      "node": true,
+      "es6": true,
+      "jest/globals": true
+    }
+  }

.github/workflows/test.yml

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+name: "test"
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - run: |
+          git fetch --no-tags --prune --depth=1 origin +refs/heads/*:refs/remotes/origin/*
+      - uses: ./
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}

.gitignore

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+# Dependency directory
+node_modules
+
+# Rest pulled from https://github.com/github/gitignore/blob/master/Node.gitignore
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+jspm_packages/
+
+# TypeScript v1 declaration files
+typings/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env
+.env.test
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+
+# next.js build output
+.next
+
+# nuxt.js build output
+.nuxt
+
+# vuepress build output
+.vuepress/dist
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# OS metadata
+.DS_Store
+Thumbs.db
+
+# Ignore built ts files
+__tests__/runner/*
+lib/**/*

LICENSE

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+ISC License
+
+Copyright (c) 2020, Matan Kushner <[email protected]>
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

README.md

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+# size-limit-action

action.yml

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+name: 'size-limit-action'
+description: 'size-limit action'
+author: 'Andres Alvarez <[email protected]>'
+branding:
+  icon: 'activity'
+  color: 'green'
+inputs:
+  access_token:
+    required: true
+    description: 'a github access token'
+runs:
+  using: 'node12'
+  main: 'dist/index.js'

jest.config.js

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+module.exports = {
+  clearMocks: true,
+  moduleFileExtensions: ['js', 'ts'],
+  testEnvironment: 'node',
+  testMatch: ['**/*.test.ts'],
+  testRunner: 'jest-circus/runner',
+  transform: {
+    '^.+\\.ts$': 'ts-jest'
+  },
+  verbose: true
+}

package.json

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+{
+  "name": "size-limit-action",
+  "version": "0.1.0",
+  "private": true,
+  "description": "size-limit action",
+  "main": "lib/main.js",
+  "license": "ISC",
+  "scripts": {
+    "build": "tsc",
+    "format": "prettier --write **/*.ts",
+    "lint": "eslint src/**/*.ts",
+    "pack": "ncc build",
+    "test": "jest"
+  },
+  "dependencies": {
+    "@actions/core": "^1.2.3",
+    "@actions/github": "^2.1.1"
+  },
+  "devDependencies": {
+    "@types/jest": "^24.0.23",
+    "@types/node": "^12.7.12",
+    "@typescript-eslint/parser": "^2.8.0",
+    "@zeit/ncc": "^0.20.5",
+    "eslint": "^5.16.0",
+    "eslint-plugin-github": "^2.0.0",
+    "eslint-plugin-jest": "^22.21.0",
+    "jest": "^24.9.0",
+    "jest-circus": "^24.9.0",
+    "js-yaml": "^3.13.1",
+    "prettier": "^1.19.1",
+    "ts-jest": "^24.2.0",
+    "typescript": "^3.6.4"
+  }
+}

src/main.ts

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+import { getInput, setFailed } from "@actions/core";
+import { context, GitHub } from "@actions/github";
+
+async function run() {
+  try {
+    const message = "message";
+    const token = getInput("github_token");
+
+    if (context.payload.pull_request == null) {
+      setFailed("No pull request found.");
+      return;
+    }
+
+    const number = context.payload.pull_request.number;
+    const octokit = new GitHub(token);
+
+    octokit.issues.createComment({
+      ...context.repo,
+      // eslint-disable-next-line camelcase
+      issue_number: number,
+      body: message
+    });
+  } catch (error) {
+    setFailed(error.message);
+  }
+}
+
+run();

tsconfig.json

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+{
+  "compilerOptions": {
+    "target": "es6",                          /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */
+    "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
+    "outDir": "./lib",                        /* Redirect output structure to the directory. */
+    "rootDir": "./src",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
+    "strict": true,                           /* Enable all strict type-checking options. */
+    "noImplicitAny": true,                    /* Raise error on expressions and declarations with an implied 'any' type. */
+    "esModuleInterop": true                   /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
+  },
+  "exclude": ["node_modules", "**/*.test.ts"]
+}