Function parse

packages/dotenv/src/index.ts:19–59

(src: string | Buffer, options?: DotenvParseOptions)

 * @returns an object with keys and values based on `src`
 */
export function parse(src: string | Buffer, options?: DotenvParseOptions): DotenvParseOutput {
  const debug = Boolean(options && options.debug)
  const obj = {}

  // convert Buffers before splitting into lines and processing
  src
    .toString()
    .split(NEWLINES_MATCH)
    .forEach((line: string, idx: number) => {
      // matching "KEY' and 'VAL' in 'KEY=VAL'
      const keyValueArr = line.match(RE_INI_KEY_VAL)
      // matched?
      if (keyValueArr != null) {
        const key = keyValueArr[1]
        // default undefined or missing values to empty string
        let val = keyValueArr[2] || ''
        const end = val.length - 1
        const isDoubleQuoted = val[0] === '"' && val[end] === '"'
        const isSingleQuoted = val[0] === "'" && val[end] === "'"

        // if single or double quoted, remove quotes
        if (isSingleQuoted || isDoubleQuoted) {
          val = val.substring(1, end)

          // if double quoted, expand newlines
          if (isDoubleQuoted) {
            val = val.replace(RE_NEWLINES, NEWLINE)
          }
        } else {
          // remove surrounding whitespace
          val = val.trim()
        }

        obj[key] = val
      } else if (debug) {
        log(`did not match key and value when parsing line ${idx + 1}: ${line}`)
      }
    })

  return obj
}

/**
 * Loads `.env` file contents into {@link https://nodejs.org/api/process.html#process_process_env | `process.env`}.