Add Single-file deployment support

[AndreyFedorovIID]

When you need to run a complex test on a client's computer, it would be convenient to be able to publish the test application in a single file (https://learn.microsoft.com/en-us/dotnet/core/deploying/single-file/overview?tabs=cli). I tried to do this, but the application immediately crashed because it could not get the path to the executable assembly (GetExecutingAssembly().Location returns null probably):

https://github.com/PragmaticFlow/NBomber/blob/9df197c486566a168e91a03450a8fa1f34665133/src/NBomber/DomainServices/Reports/ReportHelper.fs#L17-L21

It is not difficult to fix this by adding a more flexible configuration.

Perhaps there are some other reasons why such a publication will not work.

Think about adding such a feature, please.

I tried to use

WithReportFolder(Path.Combine(AppContext.BaseDirectory, "reports"))

but it didn't help.

Unhandled exception. System.ArgumentNullException: Value cannot be null. (Parameter 'path1')
   at System.IO.Path.Combine(String path1, String path2)
   at NBomber.DomainServices.Reports.ReportHelper.getFullReportsFolderPath(SessionArgs sessionArgs)
   at NBomber.DomainServices.TestHost.TestHostConsole.printContextInfo(IGlobalDependency dep, SessionArgs sessionArgs)
   at <StartupCode$NBomber>.$TestHost.StartInit@147.MoveNext()
   at <StartupCode$NBomber>.$TestHost.RunSession@263.MoveNext()
   at NBomber.DomainServices.Runners.SingleNodeRunner.run@22-6.MoveNext()
   at NBomber.DomainServices.NBomberRunner.task@19.MoveNext()
   at NBomber.DomainServices.NBomberRunner.task@37-1.MoveNext()
   at NBomber.DomainServices.NBomberRunner.run(Boolean disposeLogger, NBomberContext context)
   at NBomber.FSharp.NBomberRunner.runWithResult(IEnumerable`1 args, NBomberContext context)
   at NBomber.FSharp.NBomberRunner.run(NBomberContext context)
   at NBomber.CSharp.NBomberRunner.Run(NBomberContext context)

[AntyaDev]

Hi @AndreyFedorovIID

What version of NBomber did you use?

[AndreyFedorovIID]

    <PackageVersion Include="NBomber" Version="5.2.2"/>
    <PackageVersion Include="NBomber.Http" Version="5.0.0"/>

[AntyaDev]

Does this request come from the Business license or Enterprise? I need this information to prioritize this work item.

[AndreyFedorovIID]

I'm choosing a library for testing for the company I work for. We have not yet made a decision to purchase a license. We are currently at the stage of choosing a library.

I decided to just share an idea for improvement, which would be nice to see.

The task can be simply closed if the developers do not see any benefit.

[AntyaDev]

Don't get me wrong, but your task is relevant, and we are willing to include it in our release. We needed this info about the company to understand how we should prioritize it.

[En3Tho]

Just stumbled upon this too

You should use Process.GetCurrentProcess().MainModule.FileName instead

It is technically not a blocking issue but self-contained apps are better in a sense that you don't have to install anything to run the app. Binary is huge but it works.

[AntyaDev]

Thanks @En3Tho , It's beneficial and we will try to integrate with it.

[AntyaDev]

Hi @En3Tho , @AndreyFedorovIID Is this task is still relevant for you?

[En3Tho]

Hello, @AntyaDev For now I've resorted to manually make tar.gz archive with all the data to make copying via ssh faster. In theory single file bundle has similar size and should be easier to use.

Ideally I would rather see work done towards Making NBomber AOT-compatible (I don't know if it is now, but last time I've checked it threw at run time due to serilog missing some things that were trimmed away). I think that would be the best option. Smallest size, faster startup, similar perf for a load utility.

[AntyaDev]

Hi @En3Tho I made the changes that you requested.

Can you please try: https://www.nuget.org/packages/NBomber/5.5.0-beta.1

I tried to build using a single-file deployment, and it worked for me

[AntyaDev]

@En3Tho, @AndreyFedorovIID did you try? If it works for you, I will close this request.

[En3Tho]

Hello, @AntyaDev ! So far I haven't tried that because I'm on vacation now. I will certainly try it out in 1-2 weeks when I get back to work.

[AndreyFedorovIID]

Hi. I was on vacation too.

I just checked tests with 5.2.2 and 5.5.0-beta.1. 5.2.2 crashes as before, and 5.5.0-beta.1 works (<SelfContained>false</SelfContained> (\~12 MB) and <SelfContained>true</SelfContained> (\~74 MB) on windows). I didn't make any code changes. I don't have any tasks for stress tests right now, so I can't give you a more detailed analysis, since I can't spare the time for this. Sorry.

I do not know if all the problems have been fixed, as there may be other effects from combining assemblies into one file. It's not difficult to add tests for this, I think.

As I said earlier, you can close the issue without my response. Since it was not a request, but a suggestion for improvement. (I don't know English very well, maybe I misunderstood or I'm writing incorrectly.)