tailwindcss/integrations/io.js at master · mihavidakovic/tailwindcss · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
let { rm, existsSync } = require('fs')
let path = require('path')
let fs = require('fs/promises')

let chokidar = require('chokidar')

let resolveToolRoot = require('./resolve-tool-root')

function getWatcherOptions() {
  return {
    usePolling: true,
    interval: 200,
    awaitWriteFinish: {
      stabilityThreshold: 1500,
      pollInterval: 50,
    },
  }
}

module.exports = function ({
  /** Output directory, relative to the tool. */
  output = 'dist',

  /** Input directory, relative to the tool. */
  input = 'src',
  /** Whether or not you want to cleanup the output directory. */
  cleanup = true,
} = {}) {
  let toolRoot = resolveToolRoot()
  let fileCache = {}

  let absoluteOutputFolder = path.resolve(toolRoot, output)
  let absoluteInputFolder = path.resolve(toolRoot, input)

  if (cleanup) {
    beforeAll((done) => rm(absoluteOutputFolder, { recursive: true, force: true }, done))
    afterEach((done) => rm(absoluteOutputFolder, { recursive: true, force: true }, done))
  }

  // Restore all written files
  afterEach(async () => {
    await Promise.all(
      Object.entries(fileCache).map(async ([file, content]) => {
        try {
          if (content === null) {
            return await fs.unlink(file)
          } else {
            return await fs.writeFile(file, content, 'utf8')
          }
        } catch {}
      })
    )
  })

  async function readdir(start, parent = []) {
    let files = await fs.readdir(start, { withFileTypes: true })
    let resolvedFiles = await Promise.all(
      files.map((file) => {
        if (file.isDirectory()) {
          return readdir(path.resolve(start, file.name), [...parent, file.name])
        }
        return parent.concat(file.name).join(path.sep)
      })
    )
    return resolvedFiles.flat(Infinity)
  }

  async function resolveFile(fileOrRegex, directory) {
    if (fileOrRegex instanceof RegExp) {
      let files = await readdir(directory)
      if (files.length === 0) {
        throw new Error(`No files exists in "${directory}"`)
      }

      let filtered = files.filter((file) => fileOrRegex.test(file))
      if (filtered.length === 0) {
        throw new Error(`Not a single file matched: ${fileOrRegex}`)
      } else if (filtered.length > 1) {
        throw new Error(`Multiple files matched: ${fileOrRegex}`)
      }

      return filtered[0]
    }

    return fileOrRegex
  }

  return {
    cleanupFile(file) {
      let filePath = path.resolve(toolRoot, file)
      fileCache[filePath] = null
    },
    async fileExists(file) {
      let filePath = path.resolve(toolRoot, file)
      return existsSync(filePath)
    },
    async removeFile(file) {
      let filePath = path.resolve(toolRoot, file)
      if (!fileCache[filePath]) {
        fileCache[filePath] = await fs.readFile(filePath, 'utf8')
      }
      await fs.unlink(filePath)
    },
    async readOutputFile(file) {
      file = await resolveFile(file, absoluteOutputFolder)
      return fs.readFile(path.resolve(absoluteOutputFolder, file), 'utf8')
    },
    async readInputFile(file) {
      file = await resolveFile(file, absoluteInputFolder)
      return fs.readFile(path.resolve(absoluteInputFolder, file), 'utf8')
    },
    async appendToInputFile(file, contents) {
      let filePath = path.resolve(absoluteInputFolder, file)
      if (!fileCache[filePath]) {
        fileCache[filePath] = await fs.readFile(filePath, 'utf8')
      }

      return fs.appendFile(filePath, contents, 'utf8')
    },
    async writeInputFile(file, contents) {
      let filePath = path.resolve(absoluteInputFolder, file)
      if (!fileCache[filePath]) {
        try {
          fileCache[filePath] = await fs.readFile(filePath, 'utf8')
        } catch (err) {
          if (err.code === 'ENOENT') {
            fileCache[filePath] = null // Sentinel value to `delete` the file afterwards. This also means that we are writing to a `new` file inside the test.
          } else {
            throw err
          }
        }
      }

      return fs.writeFile(path.resolve(absoluteInputFolder, file), contents, 'utf8')
    },
    async waitForOutputFileCreation(file) {
      if (file instanceof RegExp) {
        let r = file
        let watcher = chokidar.watch(absoluteOutputFolder, getWatcherOptions())

        return new Promise((resolve) => {
          watcher.on('add', (file) => {
            if (r.test(file)) {
              watcher.close().then(() => resolve())
            }
          })
        })
      } else {
        let filePath = path.resolve(absoluteOutputFolder, file)

        return new Promise((resolve) => {
          let watcher = chokidar.watch(absoluteOutputFolder, getWatcherOptions())

          watcher.on('add', (addedFile) => {
            if (addedFile !== filePath) return
            return watcher.close().finally(resolve)
          })
        })
      }
    },
    async waitForOutputFileChange(file, cb = () => {}) {
      file = await resolveFile(file, absoluteOutputFolder)
      let filePath = path.resolve(absoluteOutputFolder, file)

      return new Promise((resolve) => {
        let watcher = chokidar.watch(absoluteOutputFolder, getWatcherOptions())

        watcher
          .on('change', (changedFile) => {
            if (changedFile !== filePath) return
            return watcher.close().finally(resolve)
          })
          .on('ready', cb)
      })
    },
  }
}