Support URLs in favicons

Resolves #2851

Author: Gerrit0

Diff for: CHANGELOG.md

@@ -4,6 +4,14 @@ title: Changelog
 
 ## Unreleased
 
+### Features
+
+-   The `--favicon` option may now be given a link starting with `https?://` instead of a path, #2851.
+
+### Bug Fixes
+
+-   Fixed an issue where unrecognized languages would incorrectly be listed in the list of languages with translations, #2852.
+
 ## v0.27.7 (2025-02-09)
 
 ### Features

Diff for: src/lib/internationalization/locales/en.cts

@@ -404,7 +404,7 @@ export = {
     useHostedBaseUrlForAbsoluteLinks_requires_hostedBaseUrl:
         "The useHostedBaseUrlForAbsoluteLinks option requires that hostedBaseUrl be set",
     favicon_must_have_one_of_the_following_extensions_0:
-        "Favicon must have on of the following extensions: {0}",
+        "Favicon must have one of the following extensions: {0}",
     option_0_must_be_an_object: "The '{0}' option must be a non-array object",
     option_0_must_be_a_function: "The '{0}' option must be a function",
     option_0_must_be_object_with_urls: `{0} must be an object with string labels as keys and URL values`,

Diff for: src/lib/output/plugins/AssetsPlugin.ts

@@ -54,7 +54,10 @@ export class AssetsPlugin extends RendererComponent {
     private onRenderBegin(event: RendererEvent) {
         const dest = join(event.outputDirectory, "assets");
 
-        if ([".ico", ".png", ".svg"].includes(extname(this.favicon))) {
+        if (
+            !/^https?:\/\//i.test(this.favicon) &&
+            [".ico", ".png", ".svg"].includes(extname(this.favicon))
+        ) {
             copySync(
                 this.favicon,
                 join(dest, "favicon" + extname(this.favicon)),

Diff for: src/lib/output/themes/MarkedPlugin.tsx

@@ -334,7 +334,7 @@ export class MarkedPlugin extends ContextAwareRendererComponent {
                 // that becomes a real thing.
                 if (
                     this.markdownLinkExternal &&
-                    /https?:\/\//i.test(href) &&
+                    /^https?:\/\//i.test(href) &&
                     !(href + "/").startsWith(this.hostedBaseUrl)
                 ) {
                     token.attrSet("target", "_blank");

Diff for: src/lib/output/themes/default/layouts/default.tsx

@@ -10,6 +10,10 @@ function favicon(context: DefaultThemeRenderContext) {
     const fav = context.options.getValue("favicon");
     if (!fav) return null;
 
+    if (/^https?:\/\//i.test(fav)) {
+        return <link rel="icon" href={fav} />;
+    }
+
     switch (extname(fav)) {
         case ".ico":
             return <link rel="icon" href={context.relativeURL("assets/favicon.ico", true)} />;

Diff for: src/lib/utils/options/declaration.ts

@@ -358,6 +358,10 @@ export enum ParameterType {
      * Resolved according to the config directory.
      */
     Path,
+    /**
+     * Resolved according to the config directory unless it starts with https?://
+     */
+    UrlOrPath,
     Number,
     Boolean,
     Map,
@@ -418,10 +422,10 @@ export interface StringDeclarationOption extends DeclarationOptionBase {
      * Specifies the resolution strategy. If `Path` is provided, values will be resolved according to their
      * location in a file. If `String` or no value is provided, values will not be resolved.
      */
-    type?: ParameterType.String | ParameterType.Path;
+    type?: ParameterType.String | ParameterType.Path | ParameterType.UrlOrPath;
 
     /**
-     * If not specified defaults to the empty string for both `String` and `Path`.
+     * If not specified defaults to the empty string for all types.
      */
     defaultValue?: string;
 
@@ -569,6 +573,7 @@ export type DeclarationOption =
 export interface ParameterTypeToOptionTypeMap {
     [ParameterType.String]: string;
     [ParameterType.Path]: string;
+    [ParameterType.UrlOrPath]: string;
     [ParameterType.Number]: number;
     [ParameterType.Boolean]: boolean;
     [ParameterType.Mixed]: unknown;
@@ -612,6 +617,19 @@ const converters: {
         option.validate?.(stringValue, i18n);
         return stringValue;
     },
+    [ParameterType.UrlOrPath](value, option, i18n, configPath) {
+        // eslint-disable-next-line @typescript-eslint/no-base-to-string
+        const stringValue = value == null ? "" : String(value);
+
+        if (/^https?:\/\//i.test(stringValue)) {
+            option.validate?.(stringValue, i18n);
+            return stringValue;
+        }
+
+        const resolved = resolve(configPath, stringValue);
+        option.validate?.(resolved, i18n);
+        return resolved;
+    },
     [ParameterType.Number](value, option, i18n) {
         const numValue = parseInt(String(value), 10) || 0;
         if (!valueIsWithinBounds(numValue, option.minValue, option.maxValue)) {
@@ -792,6 +810,18 @@ const defaultGetters: {
             ? defaultStr
             : join(process.cwd(), defaultStr);
     },
+    [ParameterType.UrlOrPath](option) {
+        const defaultStr = option.defaultValue ?? "";
+        if (defaultStr == "") {
+            return "";
+        }
+        if (/^https?:\/\//i.test(defaultStr)) {
+            return defaultStr;
+        }
+        return isAbsolute(defaultStr)
+            ? defaultStr
+            : join(process.cwd(), defaultStr);
+    },
     [ParameterType.Number](option) {
         return option.defaultValue ?? 0;
     },

Diff for: src/lib/utils/options/sources/typedoc.ts

@@ -477,15 +477,18 @@ export function addTypeDocOptions(options: Pick<Options, "addDeclaration">) {
         help: (i18n) => i18n.help_favicon(),
         validate(value, i18n) {
             const allowedExtension = [".ico", ".png", ".svg"];
-            if (!allowedExtension.includes(extname(value))) {
+            if (
+                !/^https?:\/\//i.test(value) &&
+                !allowedExtension.includes(extname(value))
+            ) {
                 throw new Error(
                     i18n.favicon_must_have_one_of_the_following_extensions_0(
                         allowedExtension.join(", "),
                     ),
                 );
             }
         },
-        type: ParameterType.Path,
+        type: ParameterType.UrlOrPath,
     });
     options.addDeclaration({
         name: "sourceLinkExternal",
@@ -508,7 +511,7 @@ export function addTypeDocOptions(options: Pick<Options, "addDeclaration">) {
         name: "hostedBaseUrl",
         help: (i18n) => i18n.help_hostedBaseUrl(),
         validate(value, i18n) {
-            if (!/https?:\/\//i.test(value)) {
+            if (!/^https?:\/\//i.test(value)) {
                 throw new Error(i18n.hostedBaseUrl_must_start_with_http());
             }
         },