Fix null handling, covered by integration tests

`core.getInput()` always returns a string, so testing for 'not null'
is always true. This then leads to previews set to an array with
a single empty string, breaking accept-header output.

Updated eslint rules should help avoid this issue in future, and new
integration tests verify that the github client configuration now
reflects the intended configuration options.

.eslintrc.yml

@@ -6,8 +6,11 @@ extends:
   - plugin:@typescript-eslint/eslint-recommended
   - plugin:@typescript-eslint/recommended
   - prettier/@typescript-eslint
+parserOptions:
+  project: ['tsconfig.eslint.json']
 rules:
   # '@typescript-eslint/explicit-function-return-type': 0
   '@typescript-eslint/no-use-before-define':
     - 2
     - functions: false
+  '@typescript-eslint/no-unnecessary-condition': error

.github/workflows/integration.yml

@@ -69,3 +69,183 @@ jobs:
             exit 1
           fi
           echo $'\u2705 Test passed' | tee -a $GITHUB_STEP_SUMMARY
+
+  test-previews:
+    name: 'Integration test: previews option'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/cache@v3
+        with:
+          path: ~/.npm
+          key: ${{runner.os}}-npm-${{hashFiles('**/package-lock.json')}}
+          restore-keys: ${{runner.os}}-npm-
+      - run: npm ci
+      - id: previews-default
+        name: Default previews not set
+        uses: ./
+        with:
+          script: |
+            const endpoint = github.request.endpoint
+            return endpoint({}).headers.accept
+          result-encoding: string
+      - id: previews-set-single
+        name: Previews set to a single value
+        uses: ./
+        with:
+          previews: foo
+          script: |
+            const endpoint = github.request.endpoint
+            return endpoint({}).headers.accept
+          result-encoding: string
+      - id: previews-set-multiple
+        name: Previews set to comma-separated list
+        uses: ./
+        with:
+          previews: foo,bar,baz
+          script: |
+            const endpoint = github.request.endpoint
+            return endpoint({}).headers.accept
+          result-encoding: string
+      - run: |
+          echo "- Validating previews default"
+          expected="application/vnd.github.v3+json"
+          if [[ "${{steps.previews-default.outputs.result}}" != $expected ]]; then
+            echo $'::error::\u274C' "Expected '$expected', got ${{steps.previews-default.outputs.result}}"
+            exit 1
+          fi
+          echo "- Validating previews set to a single value"
+          expected="application/vnd.github.foo-preview+json"
+          if [[ "${{steps.previews-set-single.outputs.result}}" != $expected ]]; then
+            echo $'::error::\u274C' "Expected '$expected', got ${{steps.previews-set-single.outputs.result}}"
+            exit 1
+          fi
+          echo "- Validating previews set to multiple values"
+          expected="application/vnd.github.foo-preview+json,application/vnd.github.bar-preview+json,application/vnd.github.baz-preview+json"
+          if [[ "${{steps.previews-set-multiple.outputs.result}}" != $expected ]]; then
+            echo $'::error::\u274C' "Expected '$expected', got ${{steps.previews-set-multiple.outputs.result}}"
+            exit 1
+          fi
+          echo $'\u2705 Test passed' | tee -a $GITHUB_STEP_SUMMARY
+
+  test-user-agent:
+    name: 'Integration test: user-agent option'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/cache@v3
+        with:
+          path: ~/.npm
+          key: ${{runner.os}}-npm-${{hashFiles('**/package-lock.json')}}
+          restore-keys: ${{runner.os}}-npm-
+      - run: npm ci
+      - id: user-agent-default
+        name: Default user-agent not set
+        uses: ./
+        with:
+          script: |
+            const endpoint = github.request.endpoint
+            return endpoint({}).headers['user-agent']
+          result-encoding: string
+      - id: user-agent-set
+        name: User-agent set
+        uses: ./
+        with:
+          user-agent: foobar
+          script: |
+            const endpoint = github.request.endpoint
+            return endpoint({}).headers['user-agent']
+          result-encoding: string
+      - id: user-agent-empty
+        name: User-agent set to an empty string
+        uses: ./
+        with:
+          user-agent: ''
+          script: |
+            const endpoint = github.request.endpoint
+            return endpoint({}).headers['user-agent']
+          result-encoding: string
+      - run: |
+          echo "- Validating user-agent default"
+          expected="actions/github-script octokit-core.js/"
+          if [[ "${{steps.user-agent-default.outputs.result}}" != "$expected"* ]]; then
+            echo $'::error::\u274C' "Expected user-agent to start with '$expected', got ${{steps.user-agent-default.outputs.result}}"
+            exit 1
+          fi
+          echo "- Validating user-agent set to a value"
+          expected="foobar octokit-core.js/"
+          if [[ "${{steps.user-agent-set.outputs.result}}" != "$expected"* ]]; then
+            echo $'::error::\u274C' "Expected user-agent to start with '$expected', got ${{steps.user-agent-set.outputs.result}}"
+            exit 1
+          fi
+          echo "- Validating user-agent set to an empty string"
+          expected="octokit-core.js/"
+          if [[ "${{steps.user-agent-empty.outputs.result}}" != "$expected"* ]]; then
+            echo $'::error::\u274C' "Expected user-agent to start with '$expected', got ${{steps.user-agent-empty.outputs.result}}"
+            exit 1
+          fi
+          echo $'\u2705 Test passed' | tee -a $GITHUB_STEP_SUMMARY
+
+  test-debug:
+    name: 'Integration test: debug option'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/cache@v3
+        with:
+          path: ~/.npm
+          key: ${{runner.os}}-npm-${{hashFiles('**/package-lock.json')}}
+          restore-keys: ${{runner.os}}-npm-
+      - run: npm ci
+      - id: debug-default
+        name: Default debug not set
+        uses: ./
+        with:
+          script: |
+            const log = github.log
+            return {
+              debug: log.debug === console.debug,
+              info: log.info === console.info
+            }
+      - id: debug-true
+        name: Debug set to true
+        uses: ./
+        with:
+          debug: true
+          script: |
+            const log = github.log
+            return {
+              debug: log.debug === console.debug,
+              info: log.info === console.info
+            }
+      - id: debug-false
+        name: Debug set to false
+        uses: ./
+        with:
+          debug: false
+          script: |
+            const log = github.log
+            return {
+              debug: log.debug === console.debug,
+              info: log.info === console.info
+            }
+      - run: |
+          echo "- Validating debug default"
+          expected='{debug:false,info:false}'
+          if [[ "${{steps.debug-default.outputs.result}}" != "$expected" ]]; then
+            echo $'::error::\u274C' "Expected '$expected', got ${{steps.debug-default.outputs.result}}"
+            exit 1
+          fi
+          echo "- Validating debug set to true"
+          expected='{debug:true,info:true}'
+          if [[ "${{steps.debug-true.outputs.result}}" != "$expected" ]]; then
+            echo $'::error::\u274C' "Expected '$expected', got ${{steps.debug-true.outputs.result}}"
+            exit 1
+          fi
+          echo "- Validating debug set to false"
+          expected='{debug:false,info:false}'
+          if [[ "${{steps.debug-false.outputs.result}}" != "$expected" ]]; then
+            echo $'::error::\u274C' "Expected '$expected', got ${{steps.debug-false.outputs.result}}"
+            exit 1
+          fi
+          echo $'\u2705 Test passed' | tee -a $GITHUB_STEP_SUMMARY

dist/index.js

@@ -15134,6 +15134,9 @@ var io = __nccwpck_require__(7436);
 var dist_node = __nccwpck_require__(8883);
 // EXTERNAL MODULE: ./node_modules/@octokit/plugin-retry/dist-node/index.js
 var plugin_retry_dist_node = __nccwpck_require__(6298);
+// EXTERNAL MODULE: ./node_modules/node-fetch/lib/index.js
+var lib = __nccwpck_require__(467);
+var lib_default = /*#__PURE__*/__nccwpck_require__.n(lib);
 ;// CONCATENATED MODULE: ./src/async-function.ts
 const AsyncFunction = Object.getPrototypeOf(async () => null).constructor;
 function callAsyncFunction(args, source) {
@@ -15161,7 +15164,7 @@ function getRetryOptions(retries, exemptStatusCodes, defaultOptions) {
         ...defaultOptions.request,
         retries
     };
-    core.debug(`GitHub client configured with: (retries: ${requestOptions.retries}, retry-exempt-status-code: ${(_a = retryOptions === null || retryOptions === void 0 ? void 0 : retryOptions.doNotRetry) !== null && _a !== void 0 ? _a : 'octokit default: [400, 401, 403, 404, 422]'})`);
+    core.debug(`GitHub client configured with: (retries: ${requestOptions.retries}, retry-exempt-status-code: ${(_a = retryOptions.doNotRetry) !== null && _a !== void 0 ? _a : 'octokit default: [400, 401, 403, 404, 422]'})`);
     return [retryOptions, requestOptions];
 }
 function parseNumberArray(listString) {
@@ -15197,9 +15200,6 @@ const wrapRequire = new Proxy(require, {
     }
 });
 
-// EXTERNAL MODULE: ./node_modules/node-fetch/lib/index.js
-var lib = __nccwpck_require__(467);
-var lib_default = /*#__PURE__*/__nccwpck_require__.n(lib);
 ;// CONCATENATED MODULE: ./src/main.ts
 
 
@@ -15217,23 +15217,19 @@ process.on('unhandledRejection', handleError);
 main().catch(handleError);
 async function main() {
     const token = core.getInput('github-token', { required: true });
-    const debug = core.getInput('debug');
+    const debug = core.getBooleanInput('debug');
     const userAgent = core.getInput('user-agent');
     const previews = core.getInput('previews');
     const retries = parseInt(core.getInput('retries'));
     const exemptStatusCodes = parseNumberArray(core.getInput('retry-exempt-status-codes'));
     const [retryOpts, requestOpts] = getRetryOptions(retries, exemptStatusCodes, utils.defaults);
-    const opts = {};
+    const opts = {
-    if (debug === 'true')
+        log: debug ? console : undefined,
-        opts.log = console;
+        userAgent: userAgent || undefined,
-    if (userAgent != null)
+        previews: previews ? previews.split(',') : undefined,
-        opts.userAgent = userAgent;
+        retry: retryOpts,
-    if (previews != null)
+        request: requestOpts
-        opts.previews = previews.split(',');
+    };
-    if (retryOpts)
-        opts.retry = retryOpts;
-    if (requestOpts)
-        opts.request = requestOpts;
     const github = (0,lib_github.getOctokit)(token, opts, plugin_retry_dist_node/* retry */.XD, dist_node/* requestLog */.g);
     const script = core.getInput('script', { required: true });
     // Using property/value shorthand on `require` (e.g. `{require}`) causes compilation errors.

src/main.ts

@@ -7,10 +7,10 @@ import * as io from '@actions/io'
 import {requestLog} from '@octokit/plugin-request-log'
 import {retry} from '@octokit/plugin-retry'
 import {RequestRequestOptions} from '@octokit/types'
-import {callAsyncFunction} from './async-function'
-import {getRetryOptions, parseNumberArray, RetryOptions} from './retry-options'
-import {wrapRequire} from './wrap-require'
 import fetch from 'node-fetch'
+import {callAsyncFunction} from './async-function'
+import {RetryOptions, getRetryOptions, parseNumberArray} from './retry-options'
+import {wrapRequire} from './wrap-require'
 
 process.on('unhandledRejection', handleError)
 main().catch(handleError)
@@ -25,7 +25,7 @@ type Options = {
 
 async function main(): Promise<void> {
   const token = core.getInput('github-token', {required: true})
-  const debug = core.getInput('debug')
+  const debug = core.getBooleanInput('debug')
   const userAgent = core.getInput('user-agent')
   const previews = core.getInput('previews')
   const retries = parseInt(core.getInput('retries'))
@@ -38,12 +38,13 @@ async function main(): Promise<void> {
     defaultGitHubOptions
   )
 
-  const opts: Options = {}
+  const opts: Options = {
-  if (debug === 'true') opts.log = console
+    log: debug ? console : undefined,
-  if (userAgent != null) opts.userAgent = userAgent
+    userAgent: userAgent || undefined,
-  if (previews != null) opts.previews = previews.split(',')
+    previews: previews ? previews.split(',') : undefined,
-  if (retryOpts) opts.retry = retryOpts
+    retry: retryOpts,
-  if (requestOpts) opts.request = requestOpts
+    request: requestOpts
+  }
 
   const github = getOctokit(token, opts, retry, requestLog)
   const script = core.getInput('script', {required: true})

src/retry-options.ts

@@ -36,7 +36,7 @@ export function getRetryOptions(
     `GitHub client configured with: (retries: ${
       requestOptions.retries
     }, retry-exempt-status-code: ${
-      retryOptions?.doNotRetry ?? 'octokit default: [400, 401, 403, 404, 422]'
+      retryOptions.doNotRetry ?? 'octokit default: [400, 401, 403, 404, 422]'
     })`
   )
 

tsconfig.eslint.json

@@ -0,0 +1,4 @@
+{
+  "extends": "./tsconfig.json",
+  "exclude": []
+}