Add and configure ESLint and update configuration for Prettier (#391)

* Apply ESLint config and update Prettier

* Update dependencies and rebuild

* Update docs

.eslintignore

@@ -0,0 +1,6 @@
+# Ignore list
+/*
+
+# Do not ignore these folders:
+!__tests__/
+!src/

.eslintrc.js

@@ -0,0 +1,49 @@
+module.exports = {
+  extends: [
+    'eslint:recommended',
+    'plugin:@typescript-eslint/recommended',
+    'plugin:eslint-plugin-jest/recommended',
+    'eslint-config-prettier'
+  ],
+  parser: '@typescript-eslint/parser',
+  plugins: ['@typescript-eslint', 'eslint-plugin-jest'],
+  rules: {
+    '@typescript-eslint/no-require-imports': 'error',
+    '@typescript-eslint/no-non-null-assertion': 'off',
+    '@typescript-eslint/no-explicit-any': 'off',
+    '@typescript-eslint/no-empty-function': 'off',
+    '@typescript-eslint/ban-ts-comment': [
+      'error',
+      {
+        'ts-ignore': 'allow-with-description'
+      }
+    ],
+    'no-console': 'error',
+    'yoda': 'error',
+    'prefer-const': [
+      'error',
+      {
+        destructuring: 'all'
+      }
+    ],
+    'no-control-regex': 'off',
+    'no-constant-condition': ['error', {checkLoops: false}]
+  },
+  overrides: [
+    {
+      files: ['**/*{test,spec}.ts'],
+      rules: {
+        '@typescript-eslint/no-unused-vars': 'off',
+        'jest/no-standalone-expect': 'off',
+        'jest/no-conditional-expect': 'off',
+        'no-console': 'off',
+
+      }
+    }
+  ],
+  env: {
+    node: true,
+    es6: true,
+    'jest/globals': true
+  }
+};

.gitattributes

@@ -1 +1,2 @@
+* text=auto eol=lf
 .licenses/** -diff linguist-generated=true

.github/workflows/codeql-analysis.yml

@@ -2,9 +2,9 @@ name: CodeQL analysis
 
 on:
   push:
-    branches: [ main ]
+    branches: [main]
   pull_request:
-    branches: [ main ]
+    branches: [main]
   schedule:
     - cron: '0 3 * * 0'
 

.github/workflows/e2e-tests.yml

@@ -192,83 +192,83 @@ jobs:
         run: __tests__/verify-dotnet.ps1 2.2 3.1
 
   test-setup-with-dotnet-quality:
-      runs-on: ${{ matrix.operating-system }}
+    runs-on: ${{ matrix.operating-system }}
-      strategy:
+    strategy:
-        fail-fast: false
+      fail-fast: false
-        matrix:
+      matrix:
-          operating-system: [ubuntu-latest, windows-latest, macOS-latest]
+        operating-system: [ubuntu-latest, windows-latest, macOS-latest]
-      steps:
+    steps:
-        - name: Checkout
+      - name: Checkout
-          uses: actions/checkout@v3
+        uses: actions/checkout@v3
-        - name: Clear toolcache
+      - name: Clear toolcache
-          shell: pwsh
+        shell: pwsh
-          run: __tests__/clear-toolcache.ps1 ${{ runner.os }}
+        run: __tests__/clear-toolcache.ps1 ${{ runner.os }}
 
-        - name: Setup dotnet 7.0 with preview quality
+      - name: Setup dotnet 7.0 with preview quality
-          uses: ./
+        uses: ./
-          with:
+        with:
-            dotnet-version: "7.0"
+          dotnet-version: '7.0'
-            dotnet-quality: "preview"
+          dotnet-quality: 'preview'
-        - name: Verify preview version
+      - name: Verify preview version
-          shell: pwsh
+        shell: pwsh
-          run: |
+        run: |
-            $version = & dotnet --version
+          $version = & dotnet --version
-            Write-Host "Installed version: $version"
+          Write-Host "Installed version: $version"
-            if (-not ($version.Contains("preview") -or $version.Contains("rc"))) { throw "Unexpected version" }
+          if (-not ($version.Contains("preview") -or $version.Contains("rc"))) { throw "Unexpected version" }
 
   test-dotnet-version-output-during-single-version-installation:
-      runs-on: ${{ matrix.operating-system }}
+    runs-on: ${{ matrix.operating-system }}
-      strategy:
+    strategy:
-        fail-fast: false
+      fail-fast: false
-        matrix:
+      matrix:
-          operating-system: [ubuntu-latest, windows-latest, macOS-latest]
+        operating-system: [ubuntu-latest, windows-latest, macOS-latest]
-      steps:
+    steps:
-        - name: Checkout
+      - name: Checkout
-          uses: actions/checkout@v3
+        uses: actions/checkout@v3
-        - name: Clear toolcache
+      - name: Clear toolcache
-          shell: pwsh
+        shell: pwsh
-          run: __tests__/clear-toolcache.ps1 ${{ runner.os }}
+        run: __tests__/clear-toolcache.ps1 ${{ runner.os }}
 
-        - name: Setup dotnet 6.0.401
+      - name: Setup dotnet 6.0.401
-          uses: ./
+        uses: ./
-          id: step1
+        id: step1
-          with:
+        with:
-            dotnet-version: "6.0.401"
+          dotnet-version: '6.0.401'
 
-        - name: Verify value of the dotnet-version output
+      - name: Verify value of the dotnet-version output
-          shell: pwsh
+        shell: pwsh
-          run: |
+        run: |
-            $version = & dotnet --version
+          $version = & dotnet --version
-            Write-Host "Installed version: $version"
+          Write-Host "Installed version: $version"
-            if (-not ($version -eq '${{steps.step1.outputs.dotnet-version}}')) { throw "Unexpected output value" }
+          if (-not ($version -eq '${{steps.step1.outputs.dotnet-version}}')) { throw "Unexpected output value" }
 
   test-dotnet-version-output-during-multiple-version-installation:
-      runs-on: ${{ matrix.operating-system }}
+    runs-on: ${{ matrix.operating-system }}
-      strategy:
+    strategy:
-        fail-fast: false
+      fail-fast: false
-        matrix:
+      matrix:
-          operating-system: [ubuntu-latest, windows-latest, macOS-latest]
+        operating-system: [ubuntu-latest, windows-latest, macOS-latest]
-      steps:
+    steps:
-        - name: Checkout
+      - name: Checkout
-          uses: actions/checkout@v3
+        uses: actions/checkout@v3
-        - name: Clear toolcache
+      - name: Clear toolcache
-          shell: pwsh
+        shell: pwsh
-          run: __tests__/clear-toolcache.ps1 ${{ runner.os }}
+        run: __tests__/clear-toolcache.ps1 ${{ runner.os }}
 
-        - name: Setup dotnet 6.0.401, 5.0.408, 7.0.100-rc.1.22431.12
+      - name: Setup dotnet 6.0.401, 5.0.408, 7.0.100-rc.1.22431.12
-          uses: ./
+        uses: ./
-          id: step2
+        id: step2
-          with:
+        with:
-            dotnet-version: |
+          dotnet-version: |
-              7.0.100-rc.1.22431.12
+            7.0.100-rc.1.22431.12
-              6.0.401
+            6.0.401
-              5.0.408
+            5.0.408
 
-        - name: Verify value of the dotnet-version output
+      - name: Verify value of the dotnet-version output
-          shell: pwsh
+        shell: pwsh
-          run: |
+        run: |
-            $version = "7.0.100-rc.1.22431.12"
+          $version = "7.0.100-rc.1.22431.12"
-            if (-not ($version -eq '${{steps.step2.outputs.dotnet-version}}')) { throw "Unexpected output value" }
+          if (-not ($version -eq '${{steps.step2.outputs.dotnet-version}}')) { throw "Unexpected output value" }
 
   test-proxy:
     runs-on: ubuntu-latest

.github/workflows/release-new-action-version.yml

@@ -21,9 +21,9 @@ jobs:
       name: releaseNewActionVersion
     runs-on: ubuntu-latest
     steps:
-    - name: Update the ${{ env.TAG_NAME }} tag
+      - name: Update the ${{ env.TAG_NAME }} tag
-      id: update-major-tag
+        id: update-major-tag
-      uses: actions/publish-action@v0.2.2
+        uses: actions/publish-action@v0.2.2
-      with:
+        with:
-        source-tag: ${{ env.TAG_NAME }}
+          source-tag: ${{ env.TAG_NAME }}
-        slack-webhook: ${{ secrets.SLACK_WEBHOOK }}
+          slack-webhook: ${{ secrets.SLACK_WEBHOOK }}

.husky/pre-commit

@@ -2,3 +2,4 @@
 . "$(dirname -- "$0")/_/husky.sh"
 
 npm run format
+npm run lint:fix

.husky/pre-push

@@ -3,3 +3,4 @@
 
 # Tests are not run at push time since they can take 2-4 minutes to complete
 npm run format-check
+npm run lint

.prettierignore

@@ -0,0 +1,7 @@
+# Ignore list
+/*
+
+# Do not ignore these folders:
+!__tests__/
+!.github/
+!src/

.prettierrc.js

@@ -0,0 +1,10 @@
+module.exports = {
+  printWidth: 80,
+  tabWidth: 2,
+  useTabs: false,
+  semi: true,
+  singleQuote: true,
+  trailingComma: 'none',
+  bracketSpacing: false,
+  arrowParens: 'avoid'
+};

.prettierrc.json

@@ -1,12 +0,0 @@
-{
-    "printWidth": 80,
-    "tabWidth": 2,
-    "useTabs": false,
-    "semi": true,
-    "singleQuote": true,
-    "trailingComma": "none",
-    "bracketSpacing": false,
-    "arrowParens": "avoid",
-    "parser": "typescript",
-    "endOfLine": "auto"
-  }

__tests__/authutil.test.ts

@@ -9,20 +9,20 @@ const fakeSourcesDirForTesting = path.join(
   's'
 );
 
-const invalidNuGetConfig: string = `<?xml version="1.0" encoding="utf-8"?>`;
+const invalidNuGetConfig = `<?xml version="1.0" encoding="utf-8"?>`;
 
-const emptyNuGetConfig: string = `<?xml version="1.0" encoding="utf-8"?>
+const emptyNuGetConfig = `<?xml version="1.0" encoding="utf-8"?>
 <configuration>
 </configuration>`;
 
-const nugetorgNuGetConfig: string = `<?xml version="1.0" encoding="utf-8"?>
+const nugetorgNuGetConfig = `<?xml version="1.0" encoding="utf-8"?>
 <configuration>
   <packageSources>
     <add key="nuget.org" value="https://api.nuget.org/v3/index.json" protocolVersion="3" />
   </packageSources>
 </configuration>`;
 
-const gprnugetorgNuGetConfig: string = `<?xml version="1.0" encoding="utf-8"?>
+const gprnugetorgNuGetConfig = `<?xml version="1.0" encoding="utf-8"?>
 <configuration>
   <packageSources>
     <add key="GPR" value="https://nuget.pkg.github.com/OwnerName/index.json" protocolVersion="3" />
@@ -30,14 +30,14 @@ const gprnugetorgNuGetConfig: string = `<?xml version="1.0" encoding="utf-8"?>
   </packageSources>
 </configuration>`;
 
-const gprNuGetConfig: string = `<?xml version="1.0" encoding="utf-8"?>
+const gprNuGetConfig = `<?xml version="1.0" encoding="utf-8"?>
 <configuration>
   <packageSources>
     <add key="GPR" value="https://nuget.pkg.github.com/OwnerName/index.json" protocolVersion="3" />
   </packageSources>
 </configuration>`;
 
-const twogprNuGetConfig: string = `<?xml version="1.0" encoding="utf-8"?>
+const twogprNuGetConfig = `<?xml version="1.0" encoding="utf-8"?>
 <configuration>
   <packageSources>
     <add key="GPR-GitHub" value="https://nuget.pkg.github.com/OwnerName/index.json" protocolVersion="3" />
@@ -45,21 +45,21 @@ const twogprNuGetConfig: string = `<?xml version="1.0" encoding="utf-8"?>
   </packageSources>
 </configuration>`;
 
-const spaceNuGetConfig: string = `<?xml version="1.0" encoding="utf-8"?>
+const spaceNuGetConfig = `<?xml version="1.0" encoding="utf-8"?>
 <configuration>
   <packageSources>
     <add key="GPR GitHub" value="https://nuget.pkg.github.com/OwnerName/index.json" protocolVersion="3" />
   </packageSources>
 </configuration>`;
 
-const azureartifactsNuGetConfig: string = `<?xml version="1.0" encoding="utf-8"?>
+const azureartifactsNuGetConfig = `<?xml version="1.0" encoding="utf-8"?>
 <configuration>
   <packageSources>
     <add key="AzureArtifacts" value="https://pkgs.dev.azure.com/amullans/_packaging/GitHubBuilds/nuget/v3/index.json" protocolVersion="3" />
   </packageSources>
 </configuration>`;
 
-const azureartifactsnugetorgNuGetConfig: string = `<?xml version="1.0" encoding="utf-8"?>
+const azureartifactsnugetorgNuGetConfig = `<?xml version="1.0" encoding="utf-8"?>
 <configuration>
   <packageSources>
     <add key="AzureArtifacts" value="https://pkgs.dev.azure.com/amullans/_packaging/GitHubBuilds/nuget/v3/index.json" protocolVersion="3" />

__tests__/csc.test.ts

@@ -1,19 +1,19 @@
+import cscFile from '../.github/csc.json';
 describe('csc tests', () => {
   it('Valid regular expression', async () => {
-    var cscFile = require('../.github/csc.json');
+    const regex = cscFile['problemMatcher'][0]['pattern'][0]['regexp'];
-    var regex = cscFile['problemMatcher'][0]['pattern'][0]['regexp'];
 
     console.log(regex);
-    var re = new RegExp(regex);
+    const re = new RegExp(regex);
 
     // Ideally we would verify that this
-    var stringsToMatch = [
+    const stringsToMatch = [
       'Program.cs(10,79): error CS1002: ; expected [/Users/zacharyeisinger/Documents/repo/setup-dotnet/__tests__/sample-broken-csproj/sample.csproj]',
       "S:\\Msbuild\\src\\Build\\Evaluation\\ExpressionShredder.cs(33,7): error CS1003: Syntax error, ',' expected [S:\\msbuild\\src\\Build\\Microsoft.Build.csproj > Properties:prop]"
     ];
 
     stringsToMatch.forEach(string => {
-      var matchStr = string.match(re);
+      const matchStr = string.match(re);
       console.log(matchStr);
       expect(matchStr).toEqual(expect.anything());
     });

__tests__/installer.test.ts

@@ -68,8 +68,8 @@ describe('DotnetCoreInstaller tests', () => {
       expect(fs.existsSync(path.join(toolDir, 'dotnet'))).toBe(true);
     }
 
-    expect(process.env.DOTNET_ROOT).toBeDefined;
+    expect(process.env.DOTNET_ROOT).toBeDefined();
-    expect(process.env.PATH).toBeDefined;
+    expect(process.env.PATH).toBeDefined();
     expect(process.env.DOTNET_ROOT).toBe(toolDir);
     expect(process.env.PATH?.startsWith(toolDir)).toBe(true);
   }, 600000);
@@ -83,15 +83,15 @@ describe('DotnetCoreInstaller tests', () => {
       expect(fs.existsSync(path.join(toolDir, 'dotnet'))).toBe(true);
     }
 
-    expect(process.env.DOTNET_ROOT).toBeDefined;
+    expect(process.env.DOTNET_ROOT).toBeDefined();
-    expect(process.env.PATH).toBeDefined;
+    expect(process.env.PATH).toBeDefined();
     expect(process.env.DOTNET_ROOT).toBe(toolDir);
     expect(process.env.PATH?.startsWith(toolDir)).toBe(true);
   }, 600000); //This needs some time to download on "slower" internet connections
 
   it('Acquires generic version of dotnet if no matching version is installed', async () => {
     await getDotnet('3.1');
-    var directory = fs
+    const directory = fs
       .readdirSync(path.join(toolDir, 'sdk'))
       .filter(fn => fn.startsWith('3.1.'));
     expect(directory.length > 0).toBe(true);
@@ -101,17 +101,16 @@ describe('DotnetCoreInstaller tests', () => {
       expect(fs.existsSync(path.join(toolDir, 'dotnet'))).toBe(true);
     }
 
-    expect(process.env.DOTNET_ROOT).toBeDefined;
+    expect(process.env.DOTNET_ROOT).toBeDefined();
-    expect(process.env.PATH).toBeDefined;
+    expect(process.env.PATH).toBeDefined();
     expect(process.env.DOTNET_ROOT).toBe(toolDir);
     expect(process.env.PATH?.startsWith(toolDir)).toBe(true);
   }, 600000); //This needs some time to download on "slower" internet connections
 
   it('Returns string with installed SDK version', async () => {
     const version = '3.1.120';
-    let installedVersion: string;
 
-    installedVersion = await getDotnet(version);
+    const installedVersion = await getDotnet(version);
 
     expect(installedVersion).toBe('3.1.120');
   }, 600000);
@@ -143,7 +142,7 @@ describe('DotnetCoreInstaller tests', () => {
   }, 30000);
 
   it('Uses an up to date powershell download script', async () => {
-    var httpCallbackClient = new hc.HttpClient('setup-dotnet-test', [], {
+    const httpCallbackClient = new hc.HttpClient('setup-dotnet-test', [], {
       allowRetries: true,
       maxRetries: 3
     });
@@ -180,7 +179,7 @@ describe('DotnetVersionResolver tests', () => {
       );
       const versionObject = await dotnetVersionResolver.createDotNetVersion();
 
-      expect(!!versionObject.value).toBeTruthy;
+      expect(!!versionObject.value).toBe(true);
     }
   );
 
@@ -223,15 +222,27 @@ describe('DotnetVersionResolver tests', () => {
   );
 
   each(['3.1', '3.1.x', '3.1.*', '3.1.X']).test(
-    "if version: '%s' that can be resolved to 'channel' option is supplied, it should set quality flag to 'true' and type to 'channel' in version object",
+    "if version: '%s' that can be resolved to 'channel' option is supplied, it should set type to 'channel' in version object",
     async version => {
       const dotnetVersionResolver = new installer.DotnetVersionResolver(
         version
       );
       const versionObject = await dotnetVersionResolver.createDotNetVersion();
 
-      expect(versionObject.type.toLowerCase().includes('channel')).toBeTruthy;
+      expect(versionObject.type.toLowerCase().includes('channel')).toBe(true);
-      expect(versionObject.qualityFlag).toBeTruthy;
+    }
+  );
+
+  each(['6.0', '6.0.x', '6.0.*', '6.0.X']).test(
+    "if version: '%s' that can be resolved to 'channel' option is supplied and its major tag is >= 6, it should set type to 'channel' and qualityFlag to 'true' in version object",
+    async version => {
+      const dotnetVersionResolver = new installer.DotnetVersionResolver(
+        version
+      );
+      const versionObject = await dotnetVersionResolver.createDotNetVersion();
+
+      expect(versionObject.type.toLowerCase().includes('channel')).toBe(true);
+      expect(versionObject.qualityFlag).toBe(true);
     }
   );
 
@@ -243,8 +254,8 @@ describe('DotnetVersionResolver tests', () => {
       );
       const versionObject = await dotnetVersionResolver.createDotNetVersion();
 
-      expect(versionObject.type.toLowerCase().includes('version')).toBeTruthy;
+      expect(versionObject.type.toLowerCase().includes('version')).toBe(true);
-      expect(versionObject.qualityFlag).toBeFalsy;
+      expect(versionObject.qualityFlag).toBe(false);
     }
   );
 
@@ -259,11 +270,11 @@ describe('DotnetVersionResolver tests', () => {
       const nonWindowsRegEx = new RegExp(/^--[vc]/);
 
       if (IS_WINDOWS) {
-        expect(windowsRegEx.test(versionObject.type)).toBeTruthy;
+        expect(windowsRegEx.test(versionObject.type)).toBe(true);
-        expect(nonWindowsRegEx.test(versionObject.type)).toBeFalsy;
+        expect(nonWindowsRegEx.test(versionObject.type)).toBe(false);
       } else {
-        expect(nonWindowsRegEx.test(versionObject.type)).toBeTruthy;
+        expect(nonWindowsRegEx.test(versionObject.type)).toBe(true);
-        expect(windowsRegEx.test(versionObject.type)).toBeFalsy;
+        expect(windowsRegEx.test(versionObject.type)).toBe(false);
       }
     }
   );
@@ -276,10 +287,7 @@ function normalizeFileContents(contents: string): string {
     .replace(new RegExp('\r', 'g'), '\n');
 }
 
-async function getDotnet(
+async function getDotnet(version: string, quality = ''): Promise<string> {
-  version: string,
-  quality: string = ''
-): Promise<string> {
   const dotnetInstaller = new installer.DotnetCoreInstaller(
     version,
     quality as QualityOptions

__tests__/setup-dotnet.test.ts

@@ -21,11 +21,11 @@ if (IS_WINDOWS) {
 const tempDir = path.join(__dirname, 'runner', 'temp2');
 
 describe('setup-dotnet tests', () => {
-  let getInputSpy = jest.spyOn(core, 'getInput');
+  const getInputSpy = jest.spyOn(core, 'getInput');
-  let getMultilineInputSpy = jest.spyOn(core, 'getMultilineInput');
+  const getMultilineInputSpy = jest.spyOn(core, 'getMultilineInput');
-  let setOutputSpy = jest.spyOn(core, 'setOutput');
+  const setOutputSpy = jest.spyOn(core, 'setOutput');
 
-  let inputs = {} as any;
+  const inputs = {} as any;
 
   beforeAll(async () => {
     process.env.RUNNER_TOOL_CACHE = toolDir;
@@ -74,7 +74,7 @@ describe('setup-dotnet tests', () => {
 
     await setup.run();
 
-    expect(setOutputSpy).toBeCalledWith('dotnet-version', '6.0.401');
+    expect(setOutputSpy).toHaveBeenCalledWith('dotnet-version', '6.0.401');
   }, 400000);
 
   it("Sets output with the version specified in global.json, if it's present", async () => {
@@ -93,6 +93,6 @@ describe('setup-dotnet tests', () => {
 
     await setup.run();
 
-    expect(setOutputSpy).toBeCalledWith('dotnet-version', '3.0.103');
+    expect(setOutputSpy).toHaveBeenCalledWith('dotnet-version', '3.0.103');
   }, 400000);
 });

dist/index.js

@@ -45,7 +45,7 @@ function configAuthentication(feedUrl, existingFileLocation = '', processRoot =
 }
 exports.configAuthentication = configAuthentication;
 function isValidKey(key) {
-    return /^[\w\-\.]+$/i.test(key);
+    return /^[\w\-.]+$/i.test(key);
 }
 function getExistingNugetConfig(processRoot) {
     const defaultConfigName = 'nuget.config';
@@ -60,9 +60,9 @@ function getExistingNugetConfig(processRoot) {
 function writeFeedToFile(feedUrl, existingFileLocation, tempFileLocation) {
     var _a, _b;
     core.info(`dotnet-auth: Finding any source references in ${existingFileLocation}, writing a new temporary configuration file with credentials to ${tempFileLocation}`);
-    let sourceKeys = [];
+    const sourceKeys = [];
     let owner = core.getInput('owner');
-    let sourceUrl = feedUrl;
+    const sourceUrl = feedUrl;
     if (!owner) {
         owner = github.context.repo.owner;
     }
@@ -132,7 +132,7 @@ function writeFeedToFile(feedUrl, existingFileLocation, tempFileLocation) {
         }
     ];
     if (!sourceKeys.length) {
-        let keystring = 'Source';
+        const keystring = 'Source';
         xmlSource[1].configuration.push({
             packageSources: [
                 {
@@ -300,9 +300,9 @@ class DotnetVersionResolver {
         return __awaiter(this, void 0, void 0, function* () {
             const response = yield httpClient.getJson(DotnetVersionResolver.DotNetCoreIndexUrl);
             const result = response.result || {};
-            let releasesInfo = result['releases-index'];
+            const releasesInfo = result['releases-index'];
-            let releaseInfo = releasesInfo.find(info => {
+            const releaseInfo = releasesInfo.find(info => {
-                let sdkParts = info['channel-version'].split('.');
+                const sdkParts = info['channel-version'].split('.');
                 return sdkParts[0] === versionParts[0];
             });
             if (!releaseInfo) {
@@ -408,8 +408,8 @@ class DotnetCoreInstaller {
     outputDotnetVersion(version) {
         return __awaiter(this, void 0, void 0, function* () {
             const installationPath = process.env['DOTNET_INSTALL_DIR'];
-            let versionsOnRunner = yield (0, promises_1.readdir)(path_1.default.join(installationPath.replace(/'/g, ''), 'sdk'));
+            const versionsOnRunner = yield (0, promises_1.readdir)(path_1.default.join(installationPath.replace(/'/g, ''), 'sdk'));
-            let installedVersion = semver_1.default.maxSatisfying(versionsOnRunner, version, {
+            const installedVersion = semver_1.default.maxSatisfying(versionsOnRunner, version, {
                 includePrerelease: true
             });
             return installedVersion;

docs/contributors.md

@@ -61,6 +61,7 @@ Pull requests are the easiest way to contribute changes to git repos at GitHub.
 
 - To implement new features or fix bugs, you need to make changes to the `.ts` files, which are located in the `src` folder
 - To comply with the code style, **you need to run the `format` script**
+- To lint the code, **you need to run the `lint:fix` script**
 - To transpile source code to `javascript` we use [NCC](https://github.com/vercel/ncc). **It is very important to run the `build` script after making changes**, otherwise your changes will not get into the final `javascript` build
 
 **Learn more about how to implement tests:**

package.json

@@ -6,9 +6,10 @@
   "main": "lib/setup-dotnet.js",
   "scripts": {
     "build": "tsc && ncc build",
-    "format": "prettier --write **/*.ts",
+    "format": "prettier --no-error-on-unmatched-pattern --config ./.prettierrc.js --write **/*.{ts,yml,yaml}",
-    "format-check": "prettier --check **/*.ts",
+    "format-check": "prettier --no-error-on-unmatched-pattern --config ./.prettierrc.js --check **/*.{ts,yml,yaml}",
-    "lint": "echo \"Fake command that does nothing. It is used in reusable workflows\"",
+    "lint": "eslint --config ./.eslintrc.js **/*.ts",
+    "lint:fix": "eslint --config ./.eslintrc.js **/*.ts --fix",
     "prepare": "husky install",
     "test": "jest --coverage --config ./jest.config.js",
     "update-installers": "nwget https://dot.net/v1/dotnet-install.ps1 -O externals/install-dotnet.ps1 && nwget https://dot.net/v1/dotnet-install.sh -O externals/install-dotnet.sh"
@@ -37,11 +38,16 @@
     "@types/jest": "^27.0.2",
     "@types/node": "^16.11.25",
     "@types/semver": "^6.2.2",
+    "@typescript-eslint/eslint-plugin": "^5.54.0",
+    "@typescript-eslint/parser": "^5.54.0",
     "@vercel/ncc": "^0.33.4",
+    "eslint": "^8.35.0",
+    "eslint-config-prettier": "^8.6.0",
+    "eslint-plugin-jest": "^27.2.1",
     "husky": "^8.0.1",
     "jest": "^27.2.5",
     "jest-circus": "^27.2.5",
-    "prettier": "^2.7.1",
+    "prettier": "^2.8.4",
     "ts-jest": "^27.0.5",
     "typescript": "^4.8.4",
     "wget-improved": "^3.2.1"

src/authutil.ts

@@ -6,7 +6,7 @@ import {XMLParser, XMLBuilder} from 'fast-xml-parser';
 
 export function configAuthentication(
   feedUrl: string,
-  existingFileLocation: string = '',
+  existingFileLocation = '',
   processRoot: string = process.cwd()
 ) {
   const existingNuGetConfig: string = path.resolve(
@@ -26,7 +26,7 @@ export function configAuthentication(
 }
 
 function isValidKey(key: string): boolean {
-  return /^[\w\-\.]+$/i.test(key);
+  return /^[\w\-.]+$/i.test(key);
 }
 
 function getExistingNugetConfig(processRoot: string) {
@@ -48,9 +48,9 @@ function writeFeedToFile(
   core.info(
     `dotnet-auth: Finding any source references in ${existingFileLocation}, writing a new temporary configuration file with credentials to ${tempFileLocation}`
   );
-  let sourceKeys: string[] = [];
+  const sourceKeys: string[] = [];
   let owner: string = core.getInput('owner');
-  let sourceUrl: string = feedUrl;
+  const sourceUrl: string = feedUrl;
   if (!owner) {
     owner = github.context.repo.owner;
   }
@@ -130,7 +130,7 @@ function writeFeedToFile(
   ];
 
   if (!sourceKeys.length) {
-    let keystring = 'Source';
+    const keystring = 'Source';
 
     xmlSource[1].configuration.push({
       packageSources: [

src/installer.ts

@@ -88,10 +88,10 @@ export class DotnetVersionResolver {
       DotnetVersionResolver.DotNetCoreIndexUrl
     );
     const result = response.result || {};
-    let releasesInfo: any[] = result['releases-index'];
+    const releasesInfo: any[] = result['releases-index'];
 
-    let releaseInfo = releasesInfo.find(info => {
+    const releaseInfo = releasesInfo.find(info => {
-      let sdkParts: string[] = info['channel-version'].split('.');
+      const sdkParts: string[] = info['channel-version'].split('.');
       return sdkParts[0] === versionParts[0];
     });
 
@@ -106,7 +106,7 @@ export class DotnetVersionResolver {
     return releaseInfo['channel-version'];
   }
 
-  static DotNetCoreIndexUrl: string =
+  static DotNetCoreIndexUrl =
     'https://dotnetcli.azureedge.net/dotnet/release-metadata/releases-index.json';
 }
 
@@ -252,11 +252,11 @@ export class DotnetCoreInstaller {
 
   private async outputDotnetVersion(version): Promise<string> {
     const installationPath = process.env['DOTNET_INSTALL_DIR']!;
-    let versionsOnRunner: string[] = await readdir(
+    const versionsOnRunner: string[] = await readdir(
       path.join(installationPath.replace(/'/g, ''), 'sdk')
     );
 
-    let installedVersion = semver.maxSatisfying(versionsOnRunner, version, {
+    const installedVersion = semver.maxSatisfying(versionsOnRunner, version, {
       includePrerelease: true
     })!;
 

src/setup-dotnet.ts

@@ -13,7 +13,7 @@ const qualityOptions = [
   'ga'
 ] as const;
 
-export type QualityOptions = typeof qualityOptions[number];
+export type QualityOptions = (typeof qualityOptions)[number];
 
 export async function run() {
   try {
@@ -100,7 +100,7 @@ export async function run() {
 }
 
 function getVersionFromGlobalJson(globalJsonPath: string): string {
-  let version: string = '';
+  let version = '';
   const globalJson = JSON.parse(
     // .trim() is necessary to strip BOM https://github.com/nodejs/node/issues/20649
     fs.readFileSync(globalJsonPath, {encoding: 'utf8'}).trim()

tsconfig.json

@@ -49,7 +49,8 @@
     // "typeRoots": [],                       /* List of folders to include type definitions from. */
     // "types": [],                           /* Type declaration files to be included in compilation. */
     // "allowSyntheticDefaultImports": true,  /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
-    "esModuleInterop": true                   /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
+    "esModuleInterop": true,                   /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
+    "resolveJsonModule": true,                /* Allows importing modules with a '.json' extension, which is a common practice in node projects. */
     // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */
     // "allowUmdGlobalAccess": true,          /* Allow accessing UMD globals from modules. */