Add <FileTree> component

.changeset/config.json

@@ -9,7 +9,7 @@
   "access": "public",
   "baseBranch": "main",
   "updateInternalDependencies": "patch",
-  "ignore": ["starlight-docs", "@example/*"],
+  "ignore": ["starlight-docs", "@example/*", "starlight-file-icons-generator"],
   "___experimentalUnsafeOptions_WILL_CHANGE_IN_PATCH": {
     "onlyUpdatePeerDependentsWhenOutOfRange": true
   }

.changeset/hot-paws-work.md

@@ -0,0 +1,5 @@
+---
+'@astrojs/starlight': minor
+---
+
+Adds `<FileTree>` component to display the structure of a directory.

.changeset/mighty-adults-help.md

@@ -0,0 +1,5 @@
+---
+'@astrojs/starlight': minor
+---
+
+Adds 144 new file-type icons from the [Seti UI icon set](https://github.com/jesseweed/seti-ui#current-icons), available with the `seti:` prefix, e.g. `seti:javascript`.

.changeset/smart-planets-flow.md

@@ -0,0 +1,5 @@
+---
+'@astrojs/starlight': minor
+---
+
+Adds 5 new icons: `astro`, `biome`, `bun`, `mdx`, and `pnpm`.

docs/src/components/icons-list.astro

@@ -54,6 +54,7 @@ const icons = Object.keys(Icons) as (keyof typeof Icons)[];
 		font-size: var(--sl-text-sm);
 		gap: 0.25rem;
 		margin: 0;
+		overflow-wrap: anywhere;
 		padding: 0.75rem;
 		background: none;
 	}

docs/src/content/docs/guides/components.mdx

@@ -233,33 +233,6 @@ Other content is also supported in asides.
 Starlight also provides a custom syntax for rendering asides in Markdown and MDX as an alternative to the `<Aside>` component.
 See the [“Authoring Content in Markdown”](/guides/authoring-content/#asides) guide for details of the custom syntax.
 
-### Icon
-
-import { Icon } from '@astrojs/starlight/components';
-import IconsList from '~/components/icons-list.astro';
-
-Starlight provides a set of common icons that you can display in your content using the `<Icon>` component.
-
-Each `<Icon>` requires a [`name`](#all-icons) and can optionally include a `label`, `size`, and `color` attribute.
-
-```mdx
-# src/content/docs/example.mdx
-
-import { Icon } from '@astrojs/starlight/components';
-
-<Icon name="star" color="goldenrod" size="2rem" />
-```
-
-The code above generates the following on the page:
-
-<Icon name="star" color="goldenrod" size="2rem" />
-
-#### All icons
-
-A list of all available icons is shown below with their associated names. Click an icon to copy the component code for it.
-
-<IconsList />
-
 ### Code
 
 Use the `<Code>` component to render syntax highlighted code when using a [Markdown code block](/guides/authoring-content/#code-blocks) is not possible, for example, to render data coming from external sources like files, databases, or APIs.
@@ -305,3 +278,79 @@ The code above generates the following on the page:
 import importedCode from '/src/env.d.ts?raw';
 
 <Code code={importedCode} lang="ts" title="src/env.d.ts" />
+
+### File Tree
+
+Use the `<FileTree>` component to display the structure of a directory with file icons and collapsible sub-directories.
+
+Specify the structure of your files and directories with an [unordered Markdown list](https://www.markdownguide.org/basic-syntax/#unordered-lists) inside `<FileTree>`.
+Create a sub-directory using a nested list or add a `/` to the end of a list item to render it as a directory without specific content.
+
+The following syntax can be used to customize the appearance of the file tree:
+
+- Highlight a file or directory by making its name bold, e.g. `**README.md**`.
+- Add a comment to a file or directory by adding more text after the name.
+- Add placeholder files and directories by using either `...` or `…` as the name.
+
+```mdx
+# src/content/docs/example.mdx
+
+import { FileTree } from '@astrojs/starlight/components';
+
+<FileTree>
+
+- astro.config.mjs an **important** file
+- package.json
+- README.md
+- src
+  - components
+    - **Header.astro**
+  - …
+- pages/
+
+</FileTree>
+```
+
+The above code generates the following on the page:
+
+import { FileTree } from '@astrojs/starlight/components';
+
+<FileTree>
+
+- astro.config.mjs an **important** file
+- package.json
+- README.md
+- src
+  - components
+    - **Header.astro**
+  - …
+- pages/
+
+</FileTree>
+
+### Icon
+
+import { Icon } from '@astrojs/starlight/components';
+import IconsList from '~/components/icons-list.astro';
+
+Starlight provides a set of common icons that you can display in your content using the `<Icon>` component.
+
+Each `<Icon>` requires a [`name`](#all-icons) and can optionally include a `label`, `size`, and `color` attribute.
+
+```mdx
+# src/content/docs/example.mdx
+
+import { Icon } from '@astrojs/starlight/components';
+
+<Icon name="star" color="goldenrod" size="2rem" />
+```
+
+The code above generates the following on the page:
+
+<Icon name="star" color="goldenrod" size="2rem" />
+
+#### All icons
+
+A list of all available icons is shown below with their associated names. Click an icon to copy the component code for it.
+
+<IconsList />

docs/src/content/docs/guides/i18n.mdx

@@ -205,7 +205,8 @@ You can provide translations for additional languages you support — or overrid
    	"aside.note": "Note",
    	"aside.tip": "Tip",
    	"aside.caution": "Caution",
-   	"aside.danger": "Danger"
+   	"aside.danger": "Danger",
+   	"fileTree.directory": "Directory"
    }
    ```
 

packages/file-icons-generator/config.ts

@@ -0,0 +1,93 @@
+import type { Definitions } from '../starlight/user-components/rehype-file-tree';
+
+export const seti = {
+	/** The GitHub repository containing the Seti UI theme using the `username/repo` format. */
+	repo: 'jesseweed/seti-ui',
+	/** The repository branch to use. */
+	branch: 'master',
+	/** The path to the icon mapping file in the repository. */
+	mapping: 'styles/components/icons/mapping.less',
+	/** The path to the icon font file in the repository. */
+	font: 'styles/_fonts/seti/seti.woff',
+	/**
+	 * Some Seti UI icons share identical SVG for multiple icons. When converted to a font, identical
+	 * SVGs will be saved as one unique glyph with its name being the first icon encountered. The
+	 * other names are lost in the process and only their associated unicode character will be kept.
+	 * As we want to access icons by their name, we need to manually map the names of identical SVGs
+	 * to the icon name that is embedded in the font glyph.
+	 * Note that when this happens, an error will be thrown indicating which icon is affected.
+	 */
+	aliases: {
+		coffee: 'cjsx',
+		html_erb: 'html',
+		less: 'json',
+	},
+	/**
+	 * Seti UI icons can be overriden to use another Seti UI icon.
+	 * The key is the icon name to override and the value is the Seti icon name to use instead.
+	 * The reason to support aliasing to another Seti UI icon is that some Seti UI icons can be
+	 * almost identical. For example, the `npm_ignored` icon used for `npm-debug.log` files is
+	 * identical to the `npm` icon except the npm logo is shifted 1px to the right. There is no need
+	 * to provide a separate icon for this case and we can just use the `npm` icon instead.
+	 */
+	overrides: {
+		ejs: 'html',
+		go: 'go2',
+		npm_ignored: 'npm',
+	},
+	/**
+	 * Allows for renaming Seti UI icons to another name.
+	 * For example, the Visual Studio Code icon used for Go is named `go2` and this is not the name
+	 * we want to expose to the user.
+	 * Note that renaming an icon happens after overrides are applied.
+	 */
+	renames: {
+		go2: 'go',
+	},
+	/**
+	 * A list of Seti UI icons to ignore.
+	 * Each entry should be commented with the reason why the icon is ignored.
+	 */
+	ignores: [
+		// The ReasonML SVG icon contains a path issue that makes it render a plain square instead of a
+		// square with the "RE" letters when converted to a font.
+		// This is also an issue in Visual Studio Code but considering that in Starlight, all the icons
+		// are also available with the `<Icon>` component, it's better to ignore it for now instead of
+		// providing an icon with no meaning.
+		'reasonml',
+	],
+};
+
+export const starlight = {
+	/** The path of the generated file in the Starlight package directory. */
+	output: 'user-components/file-tree-icons.ts',
+	/** A prefix to add to the Seti icon names. */
+	prefix: 'seti:',
+	/**
+	 * The Starlight `<Icon>` component viewBox size.
+	 * @see {@link file://../starlight/user-components/Icon.astro}
+	 */
+	iconViewBoxSize: 24,
+	/**
+	 * Extra definitions for the `<FileTree>` component that add mappings using built-in Starlight
+	 * icons.
+	 */
+	definitions: {
+		files: {
+			'astro.config.js': 'astro',
+			'astro.config.mjs': 'astro',
+			'astro.config.cjs': 'astro',
+			'astro.config.ts': 'astro',
+			'pnpm-debug.log': 'pnpm',
+			'pnpm-lock.yaml': 'pnpm',
+			'pnpm-workspace.yaml': 'pnpm',
+			'biome.json': 'biome',
+			'bun.lockb': 'bun',
+		},
+		extensions: {
+			'.astro': 'astro',
+			'.mdx': 'mdx',
+		},
+		partials: {},
+	} satisfies Definitions,
+};

packages/file-icons-generator/index.ts

@@ -0,0 +1,24 @@
+import { writeDefinitionsAndSVGs } from './utils/file';
+import { getIconSvgPaths } from './utils/font';
+import { fetchFont, fetchMapping, parseMapping } from './utils/seti';
+
+/**
+ * Script generating definitions used by the Starlight `<FileTree>` component and associated SVGs.
+ *
+ * To do so, it fetches the Seti UI icon mapping file and font from GitHub, parses the mapping to
+ * generate the definitions and a list of icons to extract as SVGs, and finally extracts the SVGs
+ * from the font and writes the definitions and SVGs to the Starlight package in a file ready to be
+ * consumed by Starlight.
+ *
+ * @see {@link file://./config.ts} for the configuration used by this script.
+ * @see {@link file://../starlight/user-components/file-tree-icons.ts} for the generated file.
+ * @see {@link https://opentype.js.org/glyph-inspector.html} for a font glyph inspector.
+ */
+
+const mapping = await fetchMapping();
+const { definitions, icons } = parseMapping(mapping);
+
+const font = await fetchFont();
+const svgPaths = getIconSvgPaths(icons, definitions, font);
+
+await writeDefinitionsAndSVGs(definitions, svgPaths);

packages/file-icons-generator/package.json

@@ -0,0 +1,18 @@
+{
+  "name": "starlight-file-icons-generator",
+  "version": "0.1.0",
+  "description": "Generates Starlight file icons based on the Seti UI theme",
+  "private": true,
+  "scripts": {
+    "build": "tsx ."
+  },
+  "license": "MIT",
+  "dependencies": {
+    "opentype.js": "^1.3.4",
+    "tsx": "^4.7.1"
+  },
+  "devDependencies": {
+    "@types/opentype.js": "^1.3.8"
+  },
+  "type": "module"
+}

packages/file-icons-generator/utils/file.ts

@@ -0,0 +1,81 @@
+import { spawn } from 'node:child_process';
+import fs from 'node:fs/promises';
+import path from 'node:path';
+import { starlight } from '../config';
+import type { Definitions } from '../../starlight/user-components/rehype-file-tree';
+
+const copyrightNotice = `/**
+* Based on https://github.com/elviswolcott/seti-icons which
+* is derived from https://github.com/jesseweed/seti-ui/
+*
+* Copyright (c) 2014 Jesse Weed
+*
+* Permission is hereby granted, free of charge, to any person obtaining
+* a copy of this software and associated documentation files (the
+* "Software"), to deal in the Software without restriction, including
+* without limitation the rights to use, copy, modify, merge, publish,
+* distribute, sublicense, and/or sell copies of the Software, and to
+* permit persons to whom the Software is furnished to do so, subject to
+* the following conditions:
+*
+* The above copyright notice and this permission notice shall be
+* included in all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/`;
+
+const generatedFileHeader = `/**
+* This file was generated by the \`file-icons-generator\` package.
+* Do not edit this file directly as it will be overwritten.
+*/`;
+
+/** Write the generated definitions and SVGs to the Starlight package. */
+export async function writeDefinitionsAndSVGs(
+	definitions: Definitions,
+	svgPaths: Record<string, string>
+) {
+	const content = `${generatedFileHeader}
+
+import type { Definitions } from './rehype-file-tree.ts';
+
+${copyrightNotice}
+export const definitions: Definitions = ${JSON.stringify(definitions)};
+
+export const FileIcons = ${JSON.stringify(svgPaths)};
+`;
+
+	const filePath = path.join('..', 'starlight', starlight.output);
+
+	await fs.writeFile(filePath, content);
+
+	await prettifyFile(path.resolve(filePath));
+}
+
+/** Run Prettier on a generated file. */
+function prettifyFile(filePath: string) {
+	return new Promise<void>((resolve, reject) => {
+		const child = spawn('pnpm', ['prettier', '-w', filePath], {
+			cwd: '../..',
+			stdio: [],
+		});
+
+		const error = new Error('Failed to run Prettier on the generated file.');
+
+		child.on('error', () => reject(error));
+		child.on('close', (code) => {
+			if (code !== 0) {
+				reject(error);
+
+				return;
+			}
+
+			resolve();
+		});
+	});
+}