prepare-config.ts — tailwindcss Source File

Source Code

import { __unstable__loadDesignSystem, compile } from '@tailwindcss/node'
import fs from 'node:fs/promises'
import path, { dirname } from 'node:path'
import { fileURLToPath } from 'node:url'
import { loadModule } from '../../../../@tailwindcss-node/src/compile'
import { resolveConfig } from '../../../../tailwindcss/src/compat/config/resolve-config'
import type { Config } from '../../../../tailwindcss/src/compat/plugin-api'
import type { DesignSystem } from '../../../../tailwindcss/src/design-system'
import { error, highlight, relative } from '../../utils/renderer'
import { migratePrefixValue } from './migrate-prefix'

const __filename = fileURLToPath(import.meta.url)
const __dirname = dirname(__filename)

const css = String.raw

export async function prepareConfig(
  configFilePath: string | null,
  options: { base: string },
): Promise<{
  designSystem: DesignSystem
  sources: { base: string; pattern: string }[]
  userConfig: Config
  configFilePath: string

  newPrefix: string | null
}> {
  try {
    if (configFilePath === null) {
      configFilePath = await detectConfigPath(options.base)
    } else if (!path.isAbsolute(configFilePath)) {
      configFilePath = path.resolve(options.base, configFilePath)
    }

    // We create a relative path from the current file to the config file. This is
    // required so that the base for Tailwind CSS can bet inside the
    // @tailwindcss-upgrade package and we can require `tailwindcss` properly.
    let relative = path.relative(__dirname, configFilePath)

    // If the path points to a file in the same directory, `path.relative` will
    // remove the leading `./` and we need to add it back in order to still
    // consider the path relative
    if (!relative.startsWith('.') && !path.isAbsolute(relative)) {
      relative = './' + relative
    }

    let userConfig = await createResolvedUserConfig(configFilePath)

    let newPrefix = userConfig.prefix ? migratePrefixValue(userConfig.prefix) : null
    let input = css`
      @import 'tailwindcss' ${newPrefix ? `prefix(${newPrefix})` : ''};
      @config '${relative}';
    `

    let [compiler, designSystem] = await Promise.all([
      compile(input, { base: __dirname, onDependency: () => {} }),
      __unstable__loadDesignSystem(input, { base: __dirname }),
    ])

    return {
// ... (74 more lines)