Support net8

[drewburlingame]

We're unable to run this in an env with net8.0. Would be helpful to have it upgraded so we don't have to install two versions of the framework.

I've opened #35 to facilitate this.

[drewburlingame]

until net8 is supported, this is what I'm running before installing dbup in my builds (on linux containers): wget https://dot.net/v1/dotnet-install.sh && bash dotnet-install.sh --version 7.0.405 --install-dir /usr/share/dotnet

[AlexeyRaga]

While installing .NET 7 is an option, there can be another workaround: setting DOTNET_ROLL_FORWARD=Major env variable.

Without:

# dbup
You must install or update .NET to run this application.

App: /root/.dotnet/tools/dbup
Architecture: arm64
Framework: 'Microsoft.NETCore.App', version '7.0.0' (arm64)
.NET location: /usr/share/dotnet

The following frameworks were found:
  8.0.2 at [/usr/share/dotnet/shared/Microsoft.NETCore.App]

With it:

# DOTNET_ROLL_FORWARD=Major dbup --version
dbup-cli 1.8.1

While installing .NET 7 is an option, there can be another workaround: setting DOTNET_ROLL_FORWARD=Major env variable.

Without:

# dbup
You must install or update .NET to run this application.

App: /root/.dotnet/tools/dbup
Architecture: arm64
Framework: 'Microsoft.NETCore.App', version '7.0.0' (arm64)
.NET location: /usr/share/dotnet

The following frameworks were found:
  8.0.2 at [/usr/share/dotnet/shared/Microsoft.NETCore.App]

With it:

# DOTNET_ROLL_FORWARD=Major dbup --version
dbup-cli 1.8.1

Thank you for this! To follow the boy scout rule, here's a way to do this without polluting the environment (this is for Powershell):

pwsh -Command { $env:DOTNET_ROLL_FORWARD="Major"; <your command here> }

This will create a "subshell" and will scope the environment variable changes for that subshell, run the command, and then exit the subshell when it's done.