DollarEnv

0.1.2

FileParser.cs

                                using System;

using System.Text;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Text.RegularExpressions;

namespace DollarEnv.Module

{

    public static class FileParser

    {

        private static Regex KeyValuePair = new Regex(

            @"(?:^|^)\s*(?:export\s+)?(?<key>[\w.-]+)(?:\s*=\s*?|:\s+?)(?<value>\s*'(?:\\'|[^'])*'|\s*""(?:\\""|[^""])*""|\s*`(?:\\`|[^`])*`|[^#\r\n]+)?\s*(?:#.*)?(?:$|$)",

            RegexOptions.Multiline);

        private static Regex QuotedText = new Regex(

            @"^(['""`])([\s\S]*)\1$", 

            RegexOptions.Multiline);

        private static Regex Newline = new Regex(

            @"\r?\n",

            RegexOptions.Multiline);

        public static Dictionary<string, string> ParseVariables(Stream stream)

        {

            var result = new Dictionary<string, string>();

            // slight risk here of the file being too big

            var content = new StreamReader(stream).ReadToEnd();

            // normalise newlines to environment

            content = Newline.Replace(content, Environment.NewLine);

            foreach (Match match in KeyValuePair.Matches(content))

            {

                var key = match.Groups["key"].Value;

                var value = match.Groups["value"].Value.Trim();

                if (value[0] == '"')

                {

                    // unescape any newlines within quotes

                    value = value

                        .Replace("\\n", "\n")

                        .Replace("\\r", "\r");

                }

                // strip the quotes

                value = QuotedText.Replace(value, "$2");

                result[key] = value;

            }

            return result;

        }

    }

}