show prerequisites in the plugin hub

src/components/Drawer.ts

@@ -2,7 +2,7 @@ import { h, React } from '../runtime';
 import { styles } from '../styles';
 import { defaultChannelVersion, helmInstallCommand } from '../catalog';
 import { IconImg, resolveIconSrc } from '../icons';
-import type { CatalogEntry } from '../types';
+import type { CatalogEntry, Prerequisite } from '../types';
 
 function humanizeKey(key: string): string {
   return key
@@ -53,6 +53,62 @@ function renderCapabilityValue(key: string, value: unknown): any {
   );
 }
 
+function prerequisiteHelmCommand(pre: Prerequisite): string {
+  const helm = pre.helm!;
+  const release = pre.name;
+  const lines = [`helm install ${release} ${helm.oci} \\`];
+  if (helm.version) lines.push(`  --version ${helm.version} \\`);
+  lines.push(`  -n ${helm.namespace}${helm.createNamespace ? ' --create-namespace' : ''}`);
+  for (const [k, v] of Object.entries(helm.defaultValues ?? {})) {
+    lines[lines.length - 1] += ' \\';
+    lines.push(`  --set ${k}=${v}`);
+  }
+  return lines.join('\n');
+}
+
+function renderPrerequisite(pre: Prerequisite, key: number): any {
+  return h(
+    'div',
+    { key, style: styles.prereqCard },
+    h(
+      'div',
+      { style: styles.prereqHead },
+      h('span', { style: styles.prereqName }, pre.name),
+      pre.installUrl
+        ? h(
+            'a',
+            {
+              href: pre.installUrl,
+              target: '_blank',
+              rel: 'noopener noreferrer',
+              style: styles.prereqLink,
+            },
+            'Docs ↗',
+          )
+        : null,
+    ),
+    pre.description ? h('div', { style: styles.prereqDesc }, pre.description) : null,
+    pre.helm
+      ? h(
+          'details',
+          null,
+          h('summary', { style: styles.prereqSummary }, 'Install command'),
+          h('pre', { style: { ...styles.codeBlock, marginTop: '0.5rem' } }, prerequisiteHelmCommand(pre)),
+        )
+      : null,
+  );
+}
+
+function renderPrerequisites(prerequisites: Prerequisite[] | undefined): any {
+  if (!prerequisites || !prerequisites.length) return null;
+  return h(
+    'div',
+    { style: styles.section },
+    h('h3', { style: styles.sectionTitle }, 'Prerequisites'),
+    h('div', { style: styles.prereqList }, ...prerequisites.map(renderPrerequisite)),
+  );
+}
+
 function renderCapabilities(caps: Record<string, unknown>): any {
   const entries = Object.entries(caps);
   if (!entries.length) return null;
@@ -247,6 +303,8 @@ export function Drawer(props: { entry: CatalogEntry; pluginName: string; onClose
           )
         : null,
 
+      isGated ? null : renderPrerequisites(entry.install?.prerequisites),
+
       h(
         'div',
         { style: styles.section },

src/styles.ts

@@ -289,4 +289,44 @@ export const styles = {
     whiteSpace: 'pre' as const,
     overflowX: 'auto' as const,
   },
+  prereqList: {
+    display: 'flex',
+    flexDirection: 'column' as const,
+    gap: '0.5rem',
+  } as const,
+  prereqCard: {
+    border: '1px solid #e5e7eb',
+    borderRadius: 8,
+    padding: '0.625rem 0.75rem',
+    background: '#f9fafb',
+  } as const,
+  prereqHead: {
+    display: 'flex',
+    alignItems: 'baseline',
+    justifyContent: 'space-between',
+    gap: '0.5rem',
+  } as const,
+  prereqName: {
+    fontWeight: 600,
+    color: '#111827',
+    fontSize: '0.875rem',
+  } as const,
+  prereqDesc: {
+    color: '#374151',
+    fontSize: '0.8125rem',
+    marginTop: '0.2rem',
+  } as const,
+  prereqLink: {
+    fontSize: '0.75rem',
+    color: '#2563eb',
+    textDecoration: 'none',
+    whiteSpace: 'nowrap' as const,
+  } as const,
+  prereqSummary: {
+    cursor: 'pointer',
+    fontSize: '0.75rem',
+    color: '#2563eb',
+    marginTop: '0.5rem',
+    userSelect: 'none' as const,
+  } as const,
 };

src/types.ts

@@ -2,6 +2,19 @@
 
 export type ExtensionType = 'plugin' | 'provider' | string;
 
+export interface Prerequisite {
+  name: string;
+  description?: string;
+  installUrl?: string;
+  helm?: {
+    oci: string;
+    version?: string;
+    namespace: string;
+    createNamespace?: boolean;
+    defaultValues?: Record<string, string>;
+  };
+}
+
 export interface CatalogEntry {
   name: string;
   type: ExtensionType;
@@ -24,6 +37,7 @@ export interface CatalogEntry {
   };
   install?: {
     helm?: { namespace?: string; releaseName?: string };
+    prerequisites?: Prerequisite[];
   };
   plugin?: {
     contributes?: { backend?: boolean; ui?: boolean; cli?: boolean };