Can the project be built on Linux? about dtmfdetection

[moving-digital]

Hi @bert2 ,

I was able to get everything working, thank you so much for your help, really appreciate it!

[bert2]

Thank you @moving-digital 🙂

I haven't updated this project in a while so the build tool cake is pretty outdated and seems to still require the old dotnet framework which is not available on linux.

You can build with the newer dotnet 6 framework that you've installed on your machine though:

root-dir> dotnet build

That will give you some compiler warnings like:

CSC : warning CA9998: FxCopAnalyzers package has been deprecated in favor of 'Microsoft.CodeAnalysis.NetAnalyzers', that ships with the .NET SDK. Please refer to https://docs.microsoft.com/visualstudio/code-quality/migrate-from-fxcop-analyzers-to-net-analyzers to migr
ate to .NET analyzers.

Since all warnings are treated as errors in this project, that'll stop the build.

In order to fix this you can either migrate that depedency, remove it or edit the two *.csproj files so warnigns won't be treated as errors:

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>netstandard2.1</TargetFramework>
    <Nullable>enable</Nullable>
    <DocumentationFile>.\obj\DtmfDetection.NAudio.xml</DocumentationFile>
  </PropertyGroup>

  <!-- remove this PropertyGroup node below -->
  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
    <WarningsAsErrors />
  </PropertyGroup>

  <ItemGroup>
...

Removing the dependecy is done by removing the corresponding PackageReference node(s) from all .csprof files.

Creating the nuget packages can be done with the dotnet cli as well nowadays:

root-dir> dotnet pack

Hope that helps.

[moving-digital]

Thanks a lot, @bert2, for your swift response 👍

Using both dotnet build and/or dotnet pack is now working, however I am still facing the same error:

./build.ps1
Preparing to run build script...
Running build script...
**Error: Failed to install addin 'Cake.Git'.**

With verbose:

Processing build script...
Installing tools...
Resolving assembly 'NuGet.Resolver.resources, Version=5.11.0.10, Culture=en-GB, PublicKeyToken=31bf3856ad364e35' using runtime installed at '/usr/lib/mono/4.5'...
Exception occurred while resolving assembly NuGet.Resolver.resources: Could not load the file 'NuGet.Resolver.resources, Version=5.11.0.10, Culture=en-GB, PublicKeyToken=31bf3856ad364e35'.
Assembly 'NuGet.Resolver.resources, Version=5.11.0.10, Culture=en-GB, PublicKeyToken=31bf3856ad364e35' not resolved
Resolving assembly 'NuGet.Protocol.resources, Version=5.11.0.10, Culture=en-GB, PublicKeyToken=31bf3856ad364e35' using runtime installed at '/usr/lib/mono/4.5'...
Exception occurred while resolving assembly NuGet.Protocol.resources: Could not load the file 'NuGet.Protocol.resources, Version=5.11.0.10, Culture=en-GB, PublicKeyToken=31bf3856ad364e35'.
Assembly 'NuGet.Protocol.resources, Version=5.11.0.10, Culture=en-GB, PublicKeyToken=31bf3856ad364e35' not resolved
  CACHE https://api.nuget.org/v3/registration5-gz-semver2/codecov/index.json
Installing addins...
  CACHE https://api.nuget.org/v3/registration5-gz-semver2/cake.codecov/index.json
The addin Cake.Codecov will reference Cake.Codecov.dll.
  CACHE https://api.nuget.org/v3/registration5-gz-semver2/cake.git/index.json
Assemblies not found for tfm .NETFramework,Version=v4.6.1 and rid [NULL].
No assemblies found after running content resolver.
Error: Cake.Core.CakeException: Failed to install addin 'Cake.Git'.
  at Cake.Core.Scripting.ScriptProcessor.InstallAddins (System.Collections.Generic.IReadOnlyCollection`1[T] addins, Cake.Core.IO.DirectoryPath installPath) [0x000c0] in <040622b6758f456b89fd2a5b24e3e64c>:0
  at Cake.Core.Scripting.ScriptRunner.Run (Cake.Core.Scripting.IScriptHost host, Cake.Core.IO.FilePath scriptPath) [0x0013b] in <040622b6758f456b89fd2a5b24e3e64c>:0
  at Cake.Features.Building.BuildFeature.RunCore (Spectre.Console.Cli.IRemainingArguments arguments, Cake.Features.Building.BuildFeatureSettings settings) [0x0010d] in <21a7d41a88904b88a0986b85ed354c53>:0
  at Cake.Features.Building.BuildFeature.Run (Spectre.Console.Cli.IRemainingArguments arguments, Cake.Features.Building.BuildFeatureSettings settings) [0x00012] in <21a7d41a88904b88a0986b85ed354c53>:0
  at Cake.Commands.DefaultCommand.Execute (Spectre.Console.Cli.CommandContext context, Cake.Commands.DefaultCommandSettings settings) [0x000d0] in <21a7d41a88904b88a0986b85ed354c53>:0

How to map the build.ps1 to the new dotnet version ?

[bert2]

Are you trying to integrate this project into your CI? Because that's all the build.ps1 from cake is good for.

I'm unfamiliar with this error but it looks like one of the cake dependencies relies on the old .net framework. You could try to upgrade cake by setting it up from scratch (https://cakebuild.net/docs/getting-started/setting-up-a-new-scripting-project). You can re-use the *.cake files though, which implement the actual CI process. Just make sure not to upgrade to the newest cake frosting which works entirely different.

[bert2]

But even then that dependency might still cause troubles, so make sure you really want to do this 😄

[moving-digital]

Hi @bert2

I'm actually trying to detect and print DTMF changes (DTMF tone starting or stopping) in a mp3 file, exactly as per your example, but when I create my own cs file with the below code (Except a different mp3 file) :

using System;
using DtmfDetection.NAudio;
using NAudio.Wave;

class Program {
    static void Main() {
        using var audioFile = new AudioFileReader("long_dtmf_tones.mp3");
        var dtmfs = audioFile.DtmfChanges();
        foreach (var dtmf in dtmfs) Console.WriteLine(dtmf);
    }
}

But I am getting the following error message, and I don't know why:

error CS1525: Unexpected symbol `var', expecting `('
Compilation failed: 1 error(s), 0 warnings

I've spent hours on stackoverflow and all, but unable to understand why compiling from cs to exe will throw that error...

A (maybe stupid) question : is there any specific location where the .cs file must be created in the project?

[bert2]

This error appears because you seem to compile with an outdated compiler or a language version setting that is too low.

It's the using var audioFile that's only possbile since C# 8.0/dotnet core 3.1.

How are you building your probject? With dotnet build? Could you show the full output of that command? Also show the contents of your .csproj file, please.

[bert2]

.cs files are usually placed next to the .csproj file or in a subdirectory next it.

[moving-digital]

Hi @bert2

Yes, building the project with dotnet build. The full output is:

dotnet build

Microsoft (R) Build Engine version 17.2.0+41abc5629 for .NET
Copyright (C) Microsoft Corporation. All rights reserved.

  Determining projects to restore...
  All projects are up-to-date for restore.
  DtmfDetection -> /home/xxx/xxx/bin/DtmfDetection/src/DtmfDetection/bin/Debug/netstandard2.1/DtmfDetection.dll
  DtmfDetection.NAudio -> /home/xxx/xxx/bin/DtmfDetection/src/DtmfDetection.NAudio/bin/Debug/netstandard2.1/DtmfDetection.NAudio.dll
  integration -> /home/xxx/xxx/bin/DtmfDetection/test/integration/bin/Debug/netcoreapp3.1/test.integration.dll
  dtmf-detector -> /home/xxx/xxx/bin/DtmfDetection/example/dtmf-detector/bin/Debug/netcoreapp3.1/dtmf-detector.dll
  unit -> /home/xxx/xxx/bin/DtmfDetection/test/unit/bin/Debug/netcoreapp3.1/test.unit.dll
  benchmark -> /home/xxx/xxx/bin/DtmfDetection/test/benchmark/bin/Debug/netcoreapp3.1/benchmark.dll

Build succeeded.
    0 Warning(s)
    0 Error(s)

Time Elapsed 00:00:14.71

Content of DtmfDetection csproj:

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>netstandard2.1</TargetFramework>
    <Nullable>enable</Nullable>
    <DocumentationFile>.\obj\DtmfDetection.xml</DocumentationFile>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.CodeAnalysis.FxCopAnalyzers" Version="3.3.2">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
    </PackageReference>
  </ItemGroup>

</Project>

Content of DtmfDetection.NAudio csproj:

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>netstandard2.1</TargetFramework>
    <Nullable>enable</Nullable>
    <DocumentationFile>.\obj\DtmfDetection.NAudio.xml</DocumentationFile>
  </PropertyGroup>


  <ItemGroup>
    <PackageReference Include="NAudio" Version="1.10.0" />
  </ItemGroup>

  <ItemGroup>
    <ProjectReference Include="..\DtmfDetection\DtmfDetection.csproj" />
  </ItemGroup>

</Project>

[bert2]

I actually meant the output of the build that fails 😄 Where are you adding your example file? It's best if you create a new .csproj for it.

No offense, but I think you should into some C# tutorials on how to do that.

[moving-digital]

Hi @bert2

Hoo my bad... Well, since I'm using linux, I've installed mono-complete, and I have created my example.cs file next to DtmfDetection.NAudio.csproj.

Then I try to compile with the following command:

mcs -out:example.exe example.cs
example.cs(7,14): error CS1525: Unexpected symbol `var', expecting `('
Compilation failed: 1 error(s), 0 warnings

However, if I just create a dummy 'hello world' cs file, it can compile without any issue.

[bert2]

I'm not entirely sure, but since dotnet core 3.1 linux users don't have to use mono anymore. You've installed dotnet 6, so you can use that instead with dotnet build in the same directory.

[moving-digital]

Hi @bert2

I think you're right, the problem may still be coming from dotnet.

After I ran dotnet build in the example folder, and tried to launch the exe, this is what I got:

 ./dtmf-detector
It was not possible to find any compatible framework version
The framework 'Microsoft.NETCore.App', version '3.1.0' (arm64) was not found.
  - The following frameworks were found:
      6.0.5 at [/home/cxxx/.dotnet/shared/Microsoft.NETCore.App]

You can resolve the problem by installing the specified framework and/or SDK.

The specified framework can be found at:
  - https://aka.ms/dotnet-core-applaunch?framework=Microsoft.NETCore.App&framework_version=3.1.0&arch=arm64&rid=debian.11-arm64

Does that mean I got to downgrade to that dotnet version, or is there a way to launch the executable with the current v6 ?

[bert2]

You better don't try to re-use the source project for this. Create a new dotnet 6 project somewhere else and as per tutorial. Then add your example code. And then add the DtmfDetection.NAudio package via nuget:

example-dir> dotnet add example.csproj DtmfDetection.NAudio

Then run dotnet build.

[bert2]

Btw you don't have to literally add the source of this project to your project. It's available on nuget and dotnet will automatically pull that package for you if you reference it in your .csproj file.