fix: theme resolution, close #59

Author: antfu

packages/slidev/node/cli.ts

@@ -4,7 +4,7 @@ import os from 'os'
 import fs from 'fs-extra'
 import yargs, { Argv } from 'yargs'
 import prompts from 'prompts'
-import { blue, bold, cyan, dim, green, yellow } from 'kolorist'
+import { blue, bold, cyan, dim, gray, green, yellow } from 'kolorist'
 import { LogLevel, ViteDevServer } from 'vite'
 import * as parser from '@slidev/parser/fs'
 import { version } from '../package.json'
@@ -293,7 +293,7 @@ function printInfo(options: ResolvedSlidevOptions, port?: number) {
   console.log(`  ${cyan('●') + blue('■') + yellow('▲')}`)
   console.log(`${bold('  Slidev')}  ${blue(`v${version}`)}`)
   console.log()
-  console.log(dim('  theme   ') + green(options.theme))
+  console.log(dim('  theme   ') + options.theme ? green(options.theme) : gray('none'))
   console.log(dim('  entry   ') + dim(path.dirname(options.entry) + path.sep) + path.basename(options.entry))
   if (port) {
     console.log()

packages/slidev/node/themes.ts

@@ -25,9 +25,16 @@ export function resolveThemeName(name: string) {
     return name
   if (isRelative(name))
     return name
+
+  // search for local packages first
+  if (packageExists(`@slidev/theme-${name}`))
+    return `@slidev/theme-${name}`
+  if (packageExists(`slidev-theme-${name}`))
+    return `slidev-theme-${name}`
+
+  // fallback to prompt install
   if (officialThemes[name] != null)
     return officialThemes[name]
-
   return `slidev-theme-${name}`
 }