feat: unocss-preset-shadcn

src/shadcn/README.md

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+- https://www.shadcn-vue.com/docs/components/button.html
+- https://github.com/unocss-community/unocss-preset-shadcn?tab=readme-ov-file#usage
+- https://unocss-preset-shadcn.vercel.app/
+
+```
+npx shadcn-vue@latest add button
+```

src/shadcn/components/ui/button/Button.vue

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+<script setup lang="ts">
+import type { HTMLAttributes } from 'vue'
+import { cn } from '@/shadcn/lib/utils'
+import { Primitive, type PrimitiveProps } from 'reka-ui'
+import { type ButtonVariants, buttonVariants } from '.'
+
+interface Props extends PrimitiveProps {
+  variant?: ButtonVariants['variant']
+  size?: ButtonVariants['size']
+  class?: HTMLAttributes['class']
+}
+
+const props = withDefaults(defineProps<Props>(), {
+  as: 'button',
+})
+</script>
+
+<template>
+  <Primitive
+    :as="as"
+    :as-child="asChild"
+    :class="cn(buttonVariants({ variant, size }), props.class)"
+  >
+    <slot />
+  </Primitive>
+</template>

src/shadcn/components/ui/button/index.ts

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+import { cva, type VariantProps } from 'class-variance-authority'
+
+export { default as Button } from './Button.vue'
+
+export const buttonVariants = cva(
+  'inline-flex items-center justify-center gap-2 whitespace-nowrap rounded-md text-sm font-medium transition-colors focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring disabled:pointer-events-none disabled:opacity-50 [&_svg]:pointer-events-none [&_svg]:size-4 [&_svg]:shrink-0',
+  {
+    variants: {
+      variant: {
+        default: 'bg-primary text-primary-foreground shadow hover:bg-primary/90',
+        destructive:
+          'bg-destructive text-destructive-foreground shadow-sm hover:bg-destructive/90',
+        outline:
+          'border border-input bg-background shadow-sm hover:bg-accent hover:text-accent-foreground',
+        secondary:
+          'bg-secondary text-secondary-foreground shadow-sm hover:bg-secondary/80',
+        ghost: 'hover:bg-accent hover:text-accent-foreground',
+        link: 'text-primary underline-offset-4 hover:underline',
+      },
+      size: {
+        default: 'h-9 px-4 py-2',
+        xs: 'h-7 rounded px-2',
+        sm: 'h-8 rounded-md px-3 text-xs',
+        lg: 'h-10 rounded-md px-8',
+        icon: 'h-9 w-9',
+      },
+    },
+    defaultVariants: {
+      variant: 'default',
+      size: 'default',
+    },
+  },
+)
+
+export type ButtonVariants = VariantProps<typeof buttonVariants>

src/shadcn/lib/utils.ts

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+import type { ClassValue } from 'clsx';
+import { clsx } from 'clsx';
+import { twMerge } from 'tailwind-merge';
+
+export function cn(...inputs: ClassValue[]) {
+  return twMerge(clsx(inputs));
+}