Add eslint and prettier (#10)

.eslintrc.cjs

@@ -0,0 +1,9 @@
+module.exports = {
+    extends: ['eslint:recommended', 'plugin:@typescript-eslint/recommended', 'prettier'],
+    parser: '@typescript-eslint/parser',
+    plugins: ['@typescript-eslint'],
+    root: true,
+    rules: {
+        'curly': 'error'
+    }
+};

.github/workflows/ci.yml

@@ -8,8 +8,8 @@ on:
 
 jobs:
   compare-dist:
-    name: Check if compiled action in dist/ matches the source files
-    uses: ./.github/workflows/compare-dist.yml
+    name: Test build
+    uses: ./.github/workflows/test-build.yml
 
   test-action:
     name: Test the action on ubuntu-latest

.github/workflows/test-build.yml

@@ -1,11 +1,11 @@
-name: Check if compiled action in dist/ matches the source files
+name: Test action build
 
 on:
   workflow_call:
 
 jobs:
-  compare-dist:
-    name: Check dist/
+  test-build:
+    name: Check if the source files build successfully and match dist/ directory
     runs-on: ubuntu-latest
     steps:
       - name: Checkout the action
@@ -23,17 +23,30 @@ jobs:
       - name: Install dependencies
         run: npm ci
       - name: Rebuild the action
-        run: npm run build
+        run: npm run all
+      - name: Compare the expected and actual src/ directories
+        run: |
+          if [ "$(git diff src/ | wc -l)" -gt "0" ]; then
+            echo "Source files are not properly formatted!"
+            exit 1
+          fi
+        id: diff_src
+      - name: Upload the expected version of src/ in case of failure
+        uses: actions/upload-artifact@v3
+        if: ${{ failure() && steps.diff_src.conclusion == 'failure' }}
+        with:
+          name: expected-src
+          path: src/
       - name: Compare the expected and actual dist/ directories
         run: |
           if [ "$(git diff dist/ | wc -l)" -gt "0" ]; then
-            echo "Detected uncommitted changes after build."
+            echo "Built sources do not match the content of the dist/ directory!"
             exit 1
           fi
-        id: diff
-      - name: Upload the expected version in case of failure
+        id: diff_dist
+      - name: Upload the expected version of dist/ in case of failure
         uses: actions/upload-artifact@v3
-        if: ${{ failure() && steps.diff.conclusion == 'failure' }}
+        if: ${{ failure() && steps.diff_dist.conclusion == 'failure' }}
         with:
           name: expected-dist
           path: dist/

.prettierrc.json

@@ -0,0 +1,4 @@
+{
+    "tabWidth": 4,
+    "printWidth": 100
+}

package.json

@@ -4,7 +4,11 @@
   "description": "Lint your crate API changes for semver violations.",
   "main": "index.js",
   "scripts": {
-    "build": "ncc build src/main.ts --license licenses.txt --minify"
+    "build": "ncc build src/main.ts --license licenses.txt --minify",
+    "format": "prettier --write src/**/*.ts",
+    "format-check": "prettier --check src/**/*.ts",
+    "lint": "eslint src/**/*.ts",
+    "all": "npm run format && npm run lint && npm run build"
   },
   "repository": {
     "type": "git",
@@ -20,15 +24,20 @@
   "dependencies": {
     "@actions-rs/core": "^0.1.6",
     "@actions/core": "^1.10.0",
+    "@actions/exec": "^1.1.1",
     "@actions/github": "^5.1.1",
     "@actions/io": "^1.1.2",
     "@actions/tool-cache": "^2.0.1",
-    "@types/node-fetch": "^2.6.2",
-    "@actions/exec": "^1.1.1"
+    "@types/node-fetch": "^2.6.2"
   },
   "devDependencies": {
     "@types/node": "^18.11.18",
+    "@typescript-eslint/eslint-plugin": "^5.53.0",
+    "@typescript-eslint/parser": "^5.53.0",
     "@vercel/ncc": "^0.36.1",
+    "eslint": "^8.34.0",
+    "eslint-config-prettier": "^8.6.0",
+    "prettier": "^2.8.4",
     "typescript": "^4.9.5"
   }
 }

src/main.ts

@@ -1,42 +1,43 @@
-import os = require('os');
+import os = require("os");
 
-import * as exec from '@actions/exec';
-import * as core from '@actions/core';
-import * as github from '@actions/github';
-import * as io from '@actions/io';
-import * as toolCache from '@actions/tool-cache';
-import * as rustCore from '@actions-rs/core';
+import * as exec from "@actions/exec";
+import * as core from "@actions/core";
+import * as github from "@actions/github";
+import * as io from "@actions/io";
+import * as toolCache from "@actions/tool-cache";
+import * as rustCore from "@actions-rs/core";
 
 function getPlatformMatchingTarget(): string {
     const platform = os.platform() as string;
     switch (platform) {
         case "linux":
-            return "x86_64-unknown-linux-gnu"
+            return "x86_64-unknown-linux-gnu";
         case "win32":
-            return "x86_64-pc-windows-msvc"
+            return "x86_64-pc-windows-msvc";
         case "darwin":
-            return "x86_64-apple-darwin"
+            return "x86_64-apple-darwin";
         default:
             throw new Error("Unsupported runner");
     }
 }
 
 function optionIfValueProvided(option: string, value?: string): string {
-    return value ? ` ${option} ${value}` : '';
+    return value ? ` ${option} ${value}` : "";
 }
 
 function getCheckReleaseArguments(): string[] {
     return [
-        optionIfValueProvided('--package', rustCore.input.getInput('crate-name')),
-        optionIfValueProvided('--manifest-path', rustCore.input.getInput('manifest-path')),
-        rustCore.input.getInputBool('verbose') ? ' --verbose' : ''
-    ].filter(el => el != '');
+        optionIfValueProvided("--package", rustCore.input.getInput("crate-name")),
+        optionIfValueProvided("--manifest-path", rustCore.input.getInput("manifest-path")),
+        rustCore.input.getInputBool("verbose") ? " --verbose" : "",
+    ].filter((el) => el != "");
 }
 
 function getGitHubToken(): string {
-    const token = process.env['GITHUB_TOKEN'] || rustCore.input.getInput('github-token');
-    if (!token)
-        throw new Error('Querying the GitHub API is possible only if the GitHub token is set.');
+    const token = process.env["GITHUB_TOKEN"] || rustCore.input.getInput("github-token");
+    if (!token) {
+        throw new Error("Querying the GitHub API is possible only if the GitHub token is set.");
+    }
     return token;
 }
 
@@ -44,12 +45,12 @@ async function getCargoSemverChecksDownloadURL(target: string): Promise<string>
     const octokit = github.getOctokit(getGitHubToken());
 
     const getReleaseUrl = await octokit.rest.repos.getLatestRelease({
-        owner: 'obi1kenobi',
-        repo: 'cargo-semver-checks'
+        owner: "obi1kenobi",
+        repo: "cargo-semver-checks",
     });
 
-    const asset = getReleaseUrl.data.assets.find(asset => {
-        return asset['name'].endsWith(`${target}.tar.gz`)
+    const asset = getReleaseUrl.data.assets.find((asset) => {
+        return asset["name"].endsWith(`${target}.tar.gz`);
     });
 
     if (!asset) {
@@ -61,17 +62,18 @@ async function getCargoSemverChecksDownloadURL(target: string): Promise<string>
 
 async function installRustUp(): Promise<void> {
     const rustup = await rustCore.RustUp.getOrInstall();
-    await rustup.call(['show']);
-    await rustup.setProfile('minimal');
-    await rustup.installToolchain('stable');
+    await rustup.call(["show"]);
+    await rustup.setProfile("minimal");
+    await rustup.installToolchain("stable");
 
     // [TODO] Remove this temporary fix once the underlying issue is fixed.
-    if (os.platform() == 'win32')
-        exec.exec('mkdir C:\\Users\\runneradmin\\.cargo\\registry\\index');
+    if (os.platform() == "win32") {
+        exec.exec("mkdir C:\\Users\\runneradmin\\.cargo\\registry\\index");
+    }
 }
 
 async function runCargoSemverChecks(cargo: rustCore.Cargo): Promise<void> {
-    await cargo.call(['semver-checks', 'check-release'].concat(getCheckReleaseArguments()));
+    await cargo.call(["semver-checks", "check-release"].concat(getCheckReleaseArguments()));
 }
 
 async function installCargoSemverChecksFromPrecompiledBinary(): Promise<void> {
@@ -79,7 +81,7 @@ async function installCargoSemverChecksFromPrecompiledBinary(): Promise<void> {
 
     core.info(`downloading cargo-semver-checks from ${url}`);
     const tarballPath = await toolCache.downloadTool(url, undefined, `token ${getGitHubToken()}`, {
-        accept: 'application/octet-stream'
+        accept: "application/octet-stream",
     });
     core.info(`extracting ${tarballPath}`);
     const binPath = await toolCache.extractTar(tarballPath, undefined, ["xz"]);
@@ -88,22 +90,22 @@ async function installCargoSemverChecksFromPrecompiledBinary(): Promise<void> {
 }
 
 async function installCargoSemverChecksUsingCargo(cargo: rustCore.Cargo): Promise<void> {
-    await cargo.call(['install', 'cargo-semver-checks', '--locked']);
+    await cargo.call(["install", "cargo-semver-checks", "--locked"]);
 }
 
 async function installCargoSemverChecks(cargo: rustCore.Cargo): Promise<void> {
-    if (await io.which('cargo-semver-checks') != '') {
+    if ((await io.which("cargo-semver-checks")) != "") {
         return;
     }
-    
-    core.info('cargo-semver-checks is not installed, installing now...');
+
+    core.info("cargo-semver-checks is not installed, installing now...");
 
     try {
         await installCargoSemverChecksFromPrecompiledBinary();
     } catch (error: any) {
-        core.info('Failed to download precompiled binary of cargo-semver-checks.');
+        core.info("Failed to download precompiled binary of cargo-semver-checks.");
         core.info(`Error: ${error.message}`);
-        core.info('Installing using cargo install...');
+        core.info("Installing using cargo install...");
 
         await installCargoSemverChecksUsingCargo(cargo);
     }