fix: handle Hugo 0.139.5 archive fallback (#696)

Co-authored-by: Codex <noreply@openai.com>

src/get-url.ts

@@ -4,6 +4,8 @@ export default function getURL(
   extended: string,
   version: string
 ): string[] {
+  const downloadVersion = getDownloadVersion(version);
+
   const extendedStr = (extended: string): string => {
     if (extended === 'true') {
       return 'extended_';
@@ -28,12 +30,12 @@ export default function getURL(
   };
 
   const baseURL = 'https://github.com/gohugoio/hugo/releases/download';
-  const assetBase = `hugo_${extendedStr(extended)}${version}_`;
-  const legacyVersionedAssetBase = `hugo_${extendedStr(extended)}v${version}_`;
+  const assetBase = `hugo_${extendedStr(extended)}${downloadVersion}_`;
+  const legacyVersionedAssetBase = `hugo_${extendedStr(extended)}v${downloadVersion}_`;
   const assetBases = [assetBase, legacyVersionedAssetBase];
   const assetURLs = (assetNames: string[]): string[] => {
     return Array.from(new Set(assetNames)).map(assetName => {
-      return `${baseURL}/v${version}/${assetName}`;
+      return `${baseURL}/v${downloadVersion}/${assetName}`;
     });
   };
 
@@ -82,3 +84,12 @@ export default function getURL(
 
   return assetURLs([`${assetBase}${os}-${arch}.tar.gz`]);
 }
+
+export function getDownloadVersion(version: string): string {
+  if (version === '0.139.5') {
+    // v0.139.5 has no release archives; Hugo publishes the same archives under v0.139.4.
+    return '0.139.4';
+  }
+
+  return version;
+}

src/installer.ts

@@ -5,7 +5,7 @@ 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';
+import getURL, {getDownloadVersion} from './get-url';
 import * as path from 'path';
 import {Tool, Action} from './constants';
 
@@ -123,6 +123,12 @@ export async function installer(version: string): Promise<void> {
   core.debug(`Processor Architecture: ${archName}`);
 
   const toolURLs: string[] = getURL(osName, archName, extended, version);
+  const downloadVersion = getDownloadVersion(version);
+  if (downloadVersion !== version) {
+    core.info(
+      `Hugo ${version} release does not publish archives; downloading v${downloadVersion} archives instead.`
+    );
+  }
 
   const workDir = await createWorkDir();
   const binDir = await createBinDir(workDir);