Trailhead/scripts/7za-shim.cs

using System;
using System.Diagnostics;
using System.IO;
using System.Text;

class Shim
{
    static string Quote(string a)
    {
        if (a.Length > 0 && a.IndexOfAny(new[] { ' ', '\t', '"' }) < 0) return a;
        var sb = new StringBuilder();
        sb.Append('"');
        int backslashes = 0;
        foreach (char c in a)
        {
            if (c == '\\') { backslashes++; continue; }
            if (c == '"') { sb.Append('\\', backslashes * 2 + 1); sb.Append('"'); }
            else { sb.Append('\\', backslashes); sb.Append(c); }
            backslashes = 0;
        }
        sb.Append('\\', backslashes * 2);
        sb.Append('"');
        return sb.ToString();
    }

    static int Main(string[] args)
    {
        string exeDir = Path.GetDirectoryName(Process.GetCurrentProcess().MainModule.FileName);
        string realExe = Path.Combine(exeDir, "7za-orig.exe");

        var argLine = new StringBuilder();
        for (int i = 0; i < args.Length; i++)
        {
            if (i > 0) argLine.Append(' ');
            argLine.Append(Quote(args[i]));
        }

        var psi = new ProcessStartInfo();
        psi.FileName = realExe;
        psi.Arguments = argLine.ToString();
        psi.UseShellExecute = false;
        psi.RedirectStandardOutput = true;
        psi.RedirectStandardError = true;
        psi.CreateNoWindow = true;

        var stdout = new StringBuilder();
        var stderr = new StringBuilder();
        var p = new Process();
        p.StartInfo = psi;
        p.OutputDataReceived += (s, e) => { if (e.Data != null) { stdout.AppendLine(e.Data); Console.Out.WriteLine(e.Data); } };
        p.ErrorDataReceived += (s, e) => { if (e.Data != null) { stderr.AppendLine(e.Data); Console.Error.WriteLine(e.Data); } };
        p.Start();
        p.BeginOutputReadLine();
        p.BeginErrorReadLine();
        p.WaitForExit();

        int code = p.ExitCode;
        if (code == 0) return 0;

        string combined = stderr.ToString() + "\n" + stdout.ToString();
        bool hasSymlinkErr = combined.IndexOf("Cannot create symbolic link", StringComparison.OrdinalIgnoreCase) >= 0;
        bool dylibMentioned =
            combined.IndexOf("libcrypto.dylib", StringComparison.OrdinalIgnoreCase) >= 0 ||
            combined.IndexOf("libssl.dylib", StringComparison.OrdinalIgnoreCase) >= 0;

        if (hasSymlinkErr && dylibMentioned) return 0;
        return code;
    }
}