use namespace="System.Threading.Tasks"

@{/*

nuget-resilient-publish
    Publishes NuGet packages with retries

sourcePackagesDir=''
    Required. Path to packages to push

nugetFeed=''
    Required. Feed to publish to.
*/}

default apiKey='${Environment.GetEnvironmentVariable("APIKEY")}'
default extra=''

var nugetArgs=''
set nugetArgs='${nugetArgs} -ApiKey ${apiKey}' if='!string.IsNullOrEmpty(apiKey)'
set nugetArgs='${nugetArgs} -Source ${nugetFeed}' if='!string.IsNullOrEmpty(nugetFeed)'
set nugetArgs='${nugetArgs} ${extra}' if='!string.IsNullOrEmpty(extra)'

@{
   var packages = Directory.EnumerateFiles(sourcePackagesDir, "*.nupkg")
                           .Where(p => !p.EndsWith(".symbols.nupkg"))
                           .ToArray();

    var nugetExePath = Environment.GetEnvironmentVariable("PUSH_NUGET_EXE");
    if (string.IsNullOrEmpty(nugetExePath))
    {
        nugetExePath = ".build/NuGet.exe";
    }

    Parallel.ForEach(packages, package =>
    {
        var retries = 0;
        var packagePath = Path.Combine(sourcePackagesDir, package);
        start:
        try
        {
            ExecClr(nugetExePath, "push " + package + " " + nugetArgs);
        }
        catch
        {
            if (++retries == 3)
            {
                throw;
            }

            goto start;
        }
    });
}