fix: Hugo package naming fix (#688)

## Summary

Rebases the Hugo package naming fix from #609 on top of the current
`main` branch, including the installer flow added in #687.

- Derive Hugo release asset OS and architecture naming conventions from
the requested Hugo version.
- Apply those conventions when selecting OS and architecture segments,
including the 0.102.x macOS universal boundary, 0.103+ downcased OS
names, Windows zip assets, and Linux ARM assets.
- Add table-driven tests for pre-0.102, 0.102.x, and 0.103+ naming
behavior, plus URL coverage for the corrected release asset names.

## Changes

- Add `getConventions` to centralize version-based release asset naming
decisions.
- Update `getOS` and `getArch` to use convention flags for macOS,
lower-case OS names, standardized architecture names, and the Windows
ARM support boundary.
- Update `getURL` to generate candidate URLs for downcased Windows and
Linux assets, and for darwin universal archives.
- Wire convention detection into `installer` before generating candidate
Hugo release asset URLs.
- Expand unit coverage for OS, architecture, convention, and URL
behavior.

## Checklist

- [x] I have read the latest README and followed the instructions.
- [x] I have added or updated tests for behavior changes.
- [x] README.md and action.yml updates are not needed because inputs and
action metadata are unchanged.
- [x] I have run the relevant verification commands.

## References

- Rebased follow-up for
https://github.com/peaceiris/actions-hugo/pull/609
- References https://github.com/peaceiris/actions-hugo/issues/605 and
https://github.com/peaceiris/actions-hugo/issues/608
- Based on `main` after
https://github.com/peaceiris/actions-hugo/pull/687

## Verification

- [x] `RUNNER_TEMP=/private/tmp npm run all`
- [ ] `npm run build` was not run because this branch does not update
bundled output and current `main` removed `lib/index.js`.


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* Version-aware conventions control OS and architecture naming,
including macOS universal asset support and expanded darwin/macOS
patterns.

* **Refactor**
* Conventions centralized and applied across installer and URL
generation; OS/arch inputs accept varied casing and naming variants.

* **Tests**
* Expanded, data-driven parameterized tests for conventions, OS/arch
mappings, URL variants, and error cases.
* Replaced network stubs with deterministic fetch-mock helpers for test
isolation.

[![Review Change
Stack](https://storage.googleapis.com/coderabbit_public_assets/review-stack-in-coderabbit-ui.svg)](https://app.coderabbit.ai/change-stack/peaceiris/actions-hugo/pull/688)
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Co-authored-by: Michael T Lombardi <michael.t.lombardi@gmail.com>
Co-authored-by: codefactor-io <support@codefactor.io>
Co-authored-by: Codex <noreply@openai.com>

__tests__/get-arch.test.ts

@@ -1,15 +1,135 @@
 import getArch from '../src/get-arch';
 
 describe('getArch', () => {
-  test('processor architecture', () => {
-    expect(getArch('x64')).toBe('64bit');
-    expect(getArch('arm')).toBe('ARM');
-    expect(getArch('arm64')).toBe('ARM64');
-  });
+  const groups = [
+    {
+      condition: 'when hugo version < 0.102.0',
+      conventions: {
+        arch: {
+          darwinUniversal: false,
+          droppedWindowsArmSupport: false,
+          standardizedNaming: false
+        },
+        os: {
+          renamedMacOS: false,
+          downcasedAll: false
+        }
+      },
+      tests: [
+        {arch: 'x64', os: 'linux', expected: '64bit'},
+        {arch: 'x64', os: 'darwin', expected: '64bit'},
+        {arch: 'x64', os: 'macOS', expected: '64bit'},
+        {arch: 'x64', os: 'windows', expected: '64bit'},
+        {arch: 'arm', os: 'linux', expected: 'ARM'},
+        {arch: 'arm', os: 'darwin', expected: 'ARM'},
+        {arch: 'arm', os: 'macOS', expected: 'ARM'},
+        {arch: 'arm', os: 'windows', expected: 'ARM'},
+        {arch: 'arm64', os: 'linux', expected: 'ARM64'},
+        {arch: 'arm64', os: 'darwin', expected: 'ARM64'},
+        {arch: 'arm64', os: 'macOS', expected: 'ARM64'},
+        {arch: 'arm64', os: 'windows', expected: 'ARM64'}
+      ]
+    },
+    {
+      condition: 'when hugo version === 0.102.z',
+      conventions: {
+        arch: {
+          darwinUniversal: true,
+          droppedWindowsArmSupport: true,
+          standardizedNaming: false
+        },
+        os: {
+          renamedMacOS: false,
+          downcasedAll: false
+        }
+      },
+      tests: [
+        {arch: 'x64', os: 'linux', expected: '64bit'},
+        {arch: 'x64', os: 'macOS', expected: 'universal'},
+        {arch: 'x64', os: 'windows', expected: '64bit'},
+        {arch: 'arm', os: 'linux', expected: 'ARM'},
+        {arch: 'arm', os: 'macOS', expected: 'universal'},
+        {arch: 'arm', os: 'windows', throws: true},
+        {arch: 'arm64', os: 'linux', expected: 'ARM64'},
+        {arch: 'arm64', os: 'macOS', expected: 'universal'},
+        {arch: 'arm64', os: 'windows', expected: 'ARM64'}
+      ]
+    },
+    {
+      condition: 'when hugo version >= 0.103.0',
+      conventions: {
+        arch: {
+          darwinUniversal: true,
+          droppedWindowsArmSupport: true,
+          standardizedNaming: true
+        },
+        os: {
+          renamedMacOS: true,
+          downcasedAll: true
+        }
+      },
+      tests: [
+        {arch: 'x64', os: 'linux', expected: 'amd64'},
+        {arch: 'x64', os: 'macOS', expected: 'universal'},
+        {arch: 'x64', os: 'windows', expected: 'amd64'},
+        {arch: 'arm', os: 'linux', expected: 'arm'},
+        {arch: 'arm', os: 'macOS', expected: 'universal'},
+        {arch: 'arm', os: 'windows', throws: true},
+        {arch: 'arm64', os: 'linux', expected: 'arm64'},
+        {arch: 'arm64', os: 'macOS', expected: 'universal'},
+        {arch: 'arm64', os: 'windows', expected: 'arm64'}
+      ]
+    },
+    {
+      condition: 'when the architecture is unsupported for the action',
+      conventions: {
+        arch: {
+          darwinUniversal: false,
+          droppedWindowsArmSupport: false,
+          standardizedNaming: false
+        },
+        os: {
+          renamedMacOS: false,
+          downcasedAll: false
+        }
+      },
+      tests: [{arch: 'mips', os: 'linux', throws: true}]
+    }
+  ];
 
-  test('exception', () => {
-    expect(() => {
-      getArch('mips');
-    }).toThrow('mips is not supported');
-  });
+  const passingTests = groups.flatMap(group =>
+    group.tests
+      .filter(example => !example.throws)
+      .map(example => ({
+        ...example,
+        condition: group.condition,
+        conventions: group.conventions
+      }))
+  );
+
+  const throwingTests = groups.flatMap(group =>
+    group.tests
+      .filter(example => example.throws)
+      .map(example => ({
+        ...example,
+        condition: group.condition,
+        conventions: group.conventions
+      }))
+  );
+
+  test.each(passingTests)(
+    '$condition: $os on $arch returns $expected',
+    ({arch, os, conventions, expected}) => {
+      expect(getArch(arch, os, conventions)).toBe(expected);
+    }
+  );
+
+  test.each(throwingTests)(
+    '$condition: $os on $arch throws as not supported',
+    ({arch, os, conventions}) => {
+      expect(() => {
+        getArch(arch, os, conventions);
+      }).toThrow(`${arch} is not supported`);
+    }
+  );
 });

__tests__/get-conventions.test.ts

@@ -0,0 +1,61 @@
+import {getConventions} from '../src/get-conventions';
+
+describe('getConventions()', () => {
+  const groups = [
+    {
+      condition: 'when hugo version < 0.102.0',
+      version: '0.101.0',
+      expected: {
+        arch: {
+          darwinUniversal: false,
+          droppedWindowsArmSupport: false,
+          standardizedNaming: false
+        },
+        os: {
+          renamedMacOS: false,
+          downcasedAll: false
+        }
+      }
+    },
+    {
+      condition: 'when hugo version === 0.102.z',
+      version: '0.102.0',
+      expected: {
+        arch: {
+          darwinUniversal: true,
+          droppedWindowsArmSupport: true,
+          standardizedNaming: false
+        },
+        os: {
+          renamedMacOS: false,
+          downcasedAll: false
+        }
+      }
+    },
+    {
+      condition: 'when hugo version >= 0.103.0',
+      version: '0.103.0',
+      expected: {
+        arch: {
+          darwinUniversal: true,
+          droppedWindowsArmSupport: true,
+          standardizedNaming: true
+        },
+        os: {
+          renamedMacOS: true,
+          downcasedAll: true
+        }
+      }
+    }
+  ].map(function (group) {
+    return Object.assign(group, {
+      toString: function () {
+        return group.condition;
+      }
+    });
+  });
+
+  test.each(groups)('%s', ({expected, version}) => {
+    expect(getConventions(version)).toEqual(expected);
+  });
+});

__tests__/get-latest-version.test.ts

@@ -1,6 +1,6 @@
 import {getURL, getLatestVersion} from '../src/get-latest-version';
-import nock from 'nock';
 import {FetchError} from 'node-fetch';
+import {clearMockFetchResponses, mockFetchResponse} from './mocks/node-fetch';
 import {Tool} from '../src/constants';
 import jsonTestBrew from './data/brew.json';
 import jsonTestGithub from './data/github.json';
@@ -10,7 +10,7 @@ beforeEach(() => {
 });
 
 afterEach(() => {
-  nock.cleanAll();
+  clearMockFetchResponses();
 });
 
 describe('getURL()', () => {
@@ -27,23 +27,25 @@ describe('getURL()', () => {
 
 describe('getLatestVersion()', () => {
   test('return latest version via brew', async () => {
-    nock('https://formulae.brew.sh').get(`/api/formula/${Tool.Repo}.json`).reply(200, jsonTestBrew);
+    mockFetchResponse(`https://formulae.brew.sh/api/formula/${Tool.Repo}.json`, 200, jsonTestBrew);
 
     const versionLatest: string = await getLatestVersion(Tool.Org, Tool.Repo, 'brew');
     expect(versionLatest).toMatch(Tool.TestVersionLatest);
   });
 
   test('return latest version via GitHub', async () => {
-    nock('https://api.github.com')
-      .get(`/repos/${Tool.Org}/${Tool.Repo}/releases/latest`)
-      .reply(200, jsonTestGithub);
+    mockFetchResponse(
+      `https://api.github.com/repos/${Tool.Org}/${Tool.Repo}/releases/latest`,
+      200,
+      jsonTestGithub
+    );
 
     const versionLatest: string = await getLatestVersion(Tool.Org, Tool.Repo, 'github');
     expect(versionLatest).toMatch(Tool.TestVersionLatest);
   });
 
   test('return exception 404', async () => {
-    nock('https://formulae.brew.sh').get(`/api/formula/${Tool.Repo}.json`).reply(404);
+    mockFetchResponse(`https://formulae.brew.sh/api/formula/${Tool.Repo}.json`, 404);
 
     await expect(getLatestVersion(Tool.Org, Tool.Repo, 'brew')).rejects.toThrow(FetchError);
   });

__tests__/get-os.test.ts

@@ -1,15 +1,100 @@
 import getOS from '../src/get-os';
 
 describe('getOS', () => {
-  test('os type', () => {
-    expect(getOS('linux')).toBe('Linux');
-    expect(getOS('darwin')).toBe('macOS');
-    expect(getOS('win32')).toBe('Windows');
+  const groups = [
+    {
+      condition: 'when hugo version < 0.102.0',
+      conventions: {
+        arch: {
+          darwinUniversal: false,
+          droppedWindowsArmSupport: false,
+          standardizedNaming: false
+        },
+        os: {
+          renamedMacOS: false,
+          downcasedAll: false
+        }
+      },
+      tests: [
+        {os: 'linux', expected: 'Linux'},
+        {os: 'darwin', expected: 'macOS'},
+        {os: 'win32', expected: 'Windows'}
+      ]
+    },
+    {
+      condition: 'when hugo version === 0.102.z',
+      conventions: {
+        arch: {
+          darwinUniversal: true,
+          droppedWindowsArmSupport: true,
+          standardizedNaming: false
+        },
+        os: {
+          renamedMacOS: false,
+          downcasedAll: false
+        }
+      },
+      tests: [
+        {os: 'linux', expected: 'Linux'},
+        {os: 'darwin', expected: 'macOS'},
+        {os: 'win32', expected: 'Windows'}
+      ]
+    },
+    {
+      condition: 'when hugo version >= 0.103.0',
+      conventions: {
+        arch: {
+          darwinUniversal: true,
+          droppedWindowsArmSupport: true,
+          standardizedNaming: true
+        },
+        os: {
+          renamedMacOS: true,
+          downcasedAll: true
+        }
+      },
+      tests: [
+        {os: 'linux', expected: 'linux'},
+        {os: 'darwin', expected: 'darwin'},
+        {os: 'win32', expected: 'windows'}
+      ]
+    }
+  ].map(function (group) {
+    group.tests = group.tests.map(function (example) {
+      return Object.assign(example, {
+        toString: function () {
+          return `${example.os} returns ${example.expected}`;
+        }
+      });
+    });
+    return Object.assign(group, {
+      toString: function () {
+        return group.condition;
+      }
+    });
+  });
+
+  describe.each(groups)('%s', ({conventions, tests}) => {
+    test.each(tests)('%s', ({os, expected}) => {
+      expect(getOS(os, conventions)).toBe(expected);
+    });
   });
 
   test('exception', () => {
+    const conventions = {
+      arch: {
+        darwinUniversal: false,
+        droppedWindowsArmSupport: false,
+        standardizedNaming: false
+      },
+      os: {
+        renamedMacOS: false,
+        downcasedAll: false
+      }
+    };
+
     expect(() => {
-      getOS('centos');
+      getOS('centos', conventions);
     }).toThrow('centos is not supported');
   });
 });

__tests__/get-url.test.ts

@@ -49,6 +49,32 @@ describe('getURL()', () => {
     ]);
   });
 
+  test('get URLs to macOS 0.102 universal assets', () => {
+    const baseURL = 'https://github.com/gohugoio/hugo/releases/download/v0.102.0';
+    expect(getURL('macOS', 'universal', 'false', '0.102.0')).toEqual([
+      `${baseURL}/hugo_0.102.0_macOS-universal.tar.gz`,
+      `${baseURL}/hugo_0.102.0_macOS-universal.zip`,
+      `${baseURL}/hugo_0.102.0_macOS-all.tar.gz`,
+      `${baseURL}/hugo_0.102.0_darwin-universal.tar.gz`,
+      `${baseURL}/hugo_0.102.0_darwin-universal.pkg`,
+      `${baseURL}/hugo_v0.102.0_macOS-universal.tar.gz`,
+      `${baseURL}/hugo_v0.102.0_macOS-universal.zip`,
+      `${baseURL}/hugo_v0.102.0_macOS-all.tar.gz`,
+      `${baseURL}/hugo_v0.102.0_darwin-universal.tar.gz`,
+      `${baseURL}/hugo_v0.102.0_darwin-universal.pkg`
+    ]);
+  });
+
+  test('get URLs to darwin assets', () => {
+    const baseURL = 'https://github.com/gohugoio/hugo/releases/download/v0.103.0';
+    expect(getURL('darwin', 'universal', 'false', '0.103.0')).toEqual([
+      `${baseURL}/hugo_0.103.0_darwin-universal.tar.gz`,
+      `${baseURL}/hugo_0.103.0_darwin-universal.pkg`,
+      `${baseURL}/hugo_v0.103.0_darwin-universal.tar.gz`,
+      `${baseURL}/hugo_v0.103.0_darwin-universal.pkg`
+    ]);
+  });
+
   test('get URLs to legacy macOS assets', () => {
     const baseURL = 'https://github.com/gohugoio/hugo/releases/download/v0.20.2';
     expect(getURL('macOS', '64bit', 'false', '0.20.2')).toEqual([
@@ -81,6 +107,16 @@ describe('getURL()', () => {
     ]);
   });
 
+  test('get URLs to downcased Windows assets', () => {
+    const baseURL = 'https://github.com/gohugoio/hugo/releases/download/v0.103.0';
+    expect(getURL('windows', 'amd64', 'false', '0.103.0')).toEqual([
+      `${baseURL}/hugo_0.103.0_windows-amd64.zip`,
+      `${baseURL}/hugo_0.103.0_Windows-amd64.zip`,
+      `${baseURL}/hugo_v0.103.0_windows-amd64.zip`,
+      `${baseURL}/hugo_v0.103.0_Windows-amd64.zip`
+    ]);
+  });
+
   test('get URLs to legacy Windows assets', () => {
     const baseURL = 'https://github.com/gohugoio/hugo/releases/download/v0.20.3';
     expect(getURL('Windows', '64bit', 'false', '0.20.3')).toEqual([
@@ -91,6 +127,18 @@ describe('getURL()', () => {
     ]);
   });
 
+  test('get URLs to downcased Linux assets', () => {
+    const baseURL = 'https://github.com/gohugoio/hugo/releases/download/v0.103.0';
+    expect(getURL('linux', 'arm', 'false', '0.103.0')).toEqual([
+      `${baseURL}/hugo_0.103.0_linux-arm.tar.gz`,
+      `${baseURL}/hugo_0.103.0_Linux-arm.tar.gz`,
+      `${baseURL}/hugo_0.103.0_Linux_arm.tar.gz`,
+      `${baseURL}/hugo_v0.103.0_linux-arm.tar.gz`,
+      `${baseURL}/hugo_v0.103.0_Linux-arm.tar.gz`,
+      `${baseURL}/hugo_v0.103.0_Linux_arm.tar.gz`
+    ]);
+  });
+
   test('get a fallback URL to an unknown OS asset', () => {
     const baseURL = 'https://github.com/gohugoio/hugo/releases/download/v0.58.2';
     expect(getURL('MyOS', '64bit', 'false', '0.58.2')).toEqual([

__tests__/main.test.ts

@@ -1,9 +1,9 @@
 import * as main from '../src/main';
 import * as io from '@actions/io';
 import path from 'path';
-import nock from 'nock';
 import {Tool, Action} from '../src/constants';
 import {FetchError} from 'node-fetch';
+import {clearMockFetchResponses, mockFetchResponse} from './mocks/node-fetch';
 import jsonTestBrew from './data/brew.json';
 // import jsonTestGithub from './data/github.json';
 
@@ -20,7 +20,7 @@ describe('Integration testing run()', () => {
 
     delete process.env['INPUT_HUGO-VERSION'];
     delete process.env['INPUT_EXTENDED'];
-    nock.cleanAll();
+    clearMockFetchResponses();
   });
 
   test('succeed in installing a custom version', async () => {
@@ -44,7 +44,7 @@ describe('Integration testing run()', () => {
   test('succeed in installing the latest version', async () => {
     const testVersion = 'latest';
     process.env['INPUT_HUGO-VERSION'] = testVersion;
-    nock('https://formulae.brew.sh').get(`/api/formula/${Tool.Repo}.json`).reply(200, jsonTestBrew);
+    mockFetchResponse(`https://formulae.brew.sh/api/formula/${Tool.Repo}.json`, 200, jsonTestBrew);
     const result: main.ActionResult = await main.run();
     expect(result.exitcode).toBe(0);
     expect(result.output).toMatch(`hugo v${Tool.TestVersionLatest}`);
@@ -54,7 +54,7 @@ describe('Integration testing run()', () => {
     const testVersion = 'latest';
     process.env['INPUT_HUGO-VERSION'] = testVersion;
     process.env['INPUT_EXTENDED'] = 'true';
-    nock('https://formulae.brew.sh').get(`/api/formula/${Tool.Repo}.json`).reply(200, jsonTestBrew);
+    mockFetchResponse(`https://formulae.brew.sh/api/formula/${Tool.Repo}.json`, 200, jsonTestBrew);
     const result: main.ActionResult = await main.run();
     expect(result.exitcode).toBe(0);
     expect(result.output).toMatch(`hugo v${Tool.TestVersionLatest}`);
@@ -63,7 +63,7 @@ describe('Integration testing run()', () => {
 
   test('fail to install the latest version due to 404 of brew', async () => {
     process.env['INPUT_HUGO-VERSION'] = 'latest';
-    nock('https://formulae.brew.sh').get(`/api/formula/${Tool.Repo}.json`).reply(404);
+    mockFetchResponse(`https://formulae.brew.sh/api/formula/${Tool.Repo}.json`, 404);
 
     await expect(main.run()).rejects.toThrow(FetchError);
   });

__tests__/mocks/node-fetch.ts

@@ -22,8 +22,35 @@ interface ResponseLike {
   json: () => Promise<unknown>;
 }
 
+interface MockResponse {
+  body?: unknown;
+  status: number;
+}
+
+const mockResponses = new Map<string, MockResponse>();
+
+export function mockFetchResponse(url: string, status: number, body?: unknown): void {
+  mockResponses.set(url, {
+    body,
+    status
+  });
+}
+
+export function clearMockFetchResponses(): void {
+  mockResponses.clear();
+}
+
 export default async function fetch(url: string | URL): Promise<ResponseLike> {
   const target = url.toString();
+  const mockResponse = mockResponses.get(target);
+  if (mockResponse) {
+    return {
+      ok: mockResponse.status >= 200 && mockResponse.status < 300,
+      status: mockResponse.status,
+      json: async () => mockResponse.body as unknown
+    };
+  }
+
   const client = target.startsWith('https:') ? https : http;
 
   return new Promise((resolve, reject) => {

src/get-arch.ts

@@ -1,11 +1,21 @@
-export default function getArch(arch: string): string {
+import {conventions} from './get-conventions';
+
+export default function getArch(arch: string, os: string, conventions: conventions): string {
+  if (conventions.arch.darwinUniversal && (os === 'darwin' || os === 'macOS')) {
+    return 'universal';
+  }
+
   switch (arch) {
     case 'x64':
-      return '64bit';
+      return conventions.arch.standardizedNaming ? 'amd64' : '64bit';
     case 'arm':
-      return 'ARM';
+      if (conventions.arch.droppedWindowsArmSupport && (os === 'Windows' || os === 'windows')) {
+        throw new Error(`${arch} is not supported`);
+      }
+
+      return conventions.arch.standardizedNaming ? 'arm' : 'ARM';
     case 'arm64':
-      return 'ARM64';
+      return conventions.arch.standardizedNaming ? 'arm64' : 'ARM64';
     default:
       throw new Error(`${arch} is not supported`);
   }

src/get-conventions.ts

@@ -0,0 +1,29 @@
+export interface conventions {
+  arch: {
+    darwinUniversal: boolean;
+    droppedWindowsArmSupport: boolean;
+    standardizedNaming: boolean;
+  };
+  os: {
+    renamedMacOS: boolean;
+    downcasedAll: boolean;
+  };
+}
+
+export function getConventions(version: string): conventions {
+  const segments = version.split('.').map(s => parseInt(s));
+  const stableOrNewer = segments[0] > 0;
+  const newerThan103 = stableOrNewer || segments[1] >= 103;
+  const newerThan102 = stableOrNewer || segments[1] >= 102;
+  return {
+    arch: {
+      darwinUniversal: newerThan102,
+      droppedWindowsArmSupport: newerThan102,
+      standardizedNaming: newerThan103
+    },
+    os: {
+      renamedMacOS: newerThan103,
+      downcasedAll: newerThan103
+    }
+  };
+}

src/get-os.ts

@@ -1,11 +1,13 @@
-export default function getOS(platform: string): string {
+import {conventions} from './get-conventions';
+
+export default function getOS(platform: string, conventions: conventions): string {
   switch (platform) {
     case 'linux':
-      return 'Linux';
+      return conventions.os.downcasedAll ? 'linux' : 'Linux';
     case 'darwin':
-      return 'macOS';
+      return conventions.os.renamedMacOS ? 'darwin' : 'macOS';
     case 'win32':
-      return 'Windows';
+      return conventions.os.downcasedAll ? 'windows' : 'Windows';
     default:
       throw new Error(`${platform} is not supported`);
   }

src/get-url.ts

@@ -49,22 +49,34 @@ export default function getURL(
     );
   }
 
-  if (os === 'Windows') {
+  if (os === 'darwin') {
     return assetURLs(
       assetBases.flatMap(assetBase => [
-        `${assetBase}Windows-${arch}.zip`,
-        `${assetBase}windows-${lowerArch(arch)}.zip`
+        `${assetBase}darwin-${arch}.tar.gz`,
+        `${assetBase}darwin-${arch}.pkg`
       ])
     );
   }
 
-  if (os === 'Linux') {
+  if (os === 'Windows' || os === 'windows') {
+    const assetPatterns =
+      os === 'windows'
+        ? [`windows-${lowerArch(arch)}.zip`, `Windows-${arch}.zip`]
+        : [`Windows-${arch}.zip`, `windows-${lowerArch(arch)}.zip`];
+
     return assetURLs(
-      assetBases.flatMap(assetBase => [
-        `${assetBase}Linux-${arch}.tar.gz`,
-        `${assetBase}Linux_${arch}.tar.gz`,
-        `${assetBase}linux-${lowerArch(arch)}.tar.gz`
-      ])
+      assetBases.flatMap(assetBase => assetPatterns.map(asset => `${assetBase}${asset}`))
+    );
+  }
+
+  if (os === 'Linux' || os === 'linux') {
+    const assetPatterns =
+      os === 'linux'
+        ? [`linux-${lowerArch(arch)}.tar.gz`, `Linux-${arch}.tar.gz`, `Linux_${arch}.tar.gz`]
+        : [`Linux-${arch}.tar.gz`, `Linux_${arch}.tar.gz`, `linux-${lowerArch(arch)}.tar.gz`];
+
+    return assetURLs(
+      assetBases.flatMap(assetBase => assetPatterns.map(asset => `${assetBase}${asset}`))
     );
   }
 

src/installer.ts

@@ -2,6 +2,7 @@ import * as core from '@actions/core';
 import * as tc from '@actions/tool-cache';
 import * as io from '@actions/io';
 import * as exec from '@actions/exec';
+import {getConventions} from './get-conventions';
 import getOS from './get-os';
 import getArch from './get-arch';
 import getURL from './get-url';
@@ -113,10 +114,12 @@ export async function installer(version: string): Promise<void> {
   const extended: string = core.getInput('extended');
   core.debug(`Hugo extended: ${extended}`);
 
-  const osName: string = getOS(process.platform);
+  const conventions = getConventions(version);
+
+  const osName: string = getOS(process.platform, conventions);
   core.debug(`Operating System: ${osName}`);
 
-  const archName: string = getArch(process.arch);
+  const archName: string = getArch(process.arch, osName, conventions);
   core.debug(`Processor Architecture: ${archName}`);
 
   const toolURLs: string[] = getURL(osName, archName, extended, version);