Function checkFile

script/validate-asset-images.js:97–136

(filePath)

}

async function checkFile(filePath) {
  const ext = path.extname(filePath)

  const { size } = await fs.stat(filePath)
  if (!size) {
    return [CRITICAL, filePath, 'file is 0 bytes']
  }

  if (ext === '.svg') {
    // Can't use `fileTypeFromFile` so have to check "manually"
    const content = await fs.readFile(filePath, 'utf-8')
    if (!content.trim()) {
      return [CRITICAL, filePath, 'file is empty']
    }
    if (!isSVG(content)) {
      return [CRITICAL, filePath, 'not a valid SVG file']
    }
    try {
      checkSVGContent(content)
    } catch (error) {
      return [CRITICAL, filePath, error.message]
    }
  } else if (EXPECT[ext]) {
    const fileType = await fileTypeFromFile(filePath)
    if (!fileType) {
      return [CRITICAL, filePath, "can't extract file type"]
    }
    const { mime } = fileType
    const expect = EXPECT[ext]
    if (expect !== mime) {
      return [CRITICAL, filePath, `Expected mime type '${expect}' but was '${mime}'`]
    }
  } else if (!ext) {
    return [WARNING, filePath, 'Has no file extension']
  } else {
    return [WARNING, filePath, `Don't know how to validate '${ext}'`]
  }

  // All is well. Nothing to complain about.
}

function checkSVGContent(content) {
  const $ = cheerio.load(content)