List available compilers

[Telokis]

The option -compiler allows the user to specify which compiler he wishes to use but there is no way to list what compilers are available (detected by sw).

I think a command sw list-compilers would be very useful.
It would also print the one that sw chose so the user know which one will be used when running commands without the -compiler option.

[egorpugin]

Initial implementation:

>sw -list-programs
List of detected programs:
  Microsoft Visual Studio C/C++ Compiler (short form - msvc):
    release:
      - 19.16.27034
      - 19.24.28314
    preview:
      - 19.24.28314-preview
  Clang C/C++ Compiler (short form - clang):
    release:
      - 10.0.0
  Clang C/C++ Compiler in MSVC compatibility mode (short form - clangcl):
    release:
      - 10.0.0

Use short program form plus version to select it for use.
short-version
Examples: msvc-19.16, msvc-19.24, clang-10

[egorpugin]

Also there's new -list-predefined-targets option.

>sw -list-predefined-targets
org.LLVM.ar-10.0.0
org.LLVM.clang-10.0.0
org.LLVM.clangcl-10.0.0
org.LLVM.clangpp-10.0.0
org.LLVM.lld-0.0.1
com.intel.compiler.c-19.0.4.245
com.intel.compiler.cpp-19.0.4.245
com.intel.compiler.lib-2019.4.245
com.intel.compiler.link-0.0.1
com.Microsoft.VisualStudio.VC.ATLMFC-15.9.28307.960
com.Microsoft.VisualStudio.VC.ATLMFC-16.5.29521.150-preview
com.Microsoft.VisualStudio.VC.ATLMFC-19.16.27034
com.Microsoft.VisualStudio.VC.ATLMFC-19.24.28314-preview
com.Microsoft.VisualStudio.VC.ATLMFC-19.24.28314
com.Microsoft.VisualStudio.VC.cl-19.16.27034
com.Microsoft.VisualStudio.VC.cl-19.24.28314-preview
com.Microsoft.VisualStudio.VC.cl-19.24.28314
com.Microsoft.VisualStudio.VC.concrt-15.9.28307.960
com.Microsoft.VisualStudio.VC.concrt-16.5.29521.150-preview
com.Microsoft.VisualStudio.VC.concrt-19.16.27034
com.Microsoft.VisualStudio.VC.concrt-19.24.28314-preview
com.Microsoft.VisualStudio.VC.concrt-19.24.28314
com.Microsoft.VisualStudio.VC.lib-19.16.27034
com.Microsoft.VisualStudio.VC.lib-19.24.28314-preview
com.Microsoft.VisualStudio.VC.lib-19.24.28314
com.Microsoft.VisualStudio.VC.libcpp-15.9.28307.960
com.Microsoft.VisualStudio.VC.libcpp-16.5.29521.150-preview
com.Microsoft.VisualStudio.VC.libcpp-19.16.27034
com.Microsoft.VisualStudio.VC.libcpp-19.24.28314-preview
com.Microsoft.VisualStudio.VC.libcpp-19.24.28314
com.Microsoft.VisualStudio.VC.link-19.16.27034
com.Microsoft.VisualStudio.VC.link-19.24.28314-preview
com.Microsoft.VisualStudio.VC.link-19.24.28314
com.Microsoft.VisualStudio.VC.ml-19.16.27034
com.Microsoft.VisualStudio.VC.ml-19.24.28314-preview
com.Microsoft.VisualStudio.VC.ml-19.24.28314
com.Microsoft.VisualStudio.VC.runtime-15.9.28307.960
com.Microsoft.VisualStudio.VC.runtime-16.5.29521.150-preview
com.Microsoft.VisualStudio.VC.runtime-19.16.27034
com.Microsoft.VisualStudio.VC.runtime-19.24.28314-preview
com.Microsoft.VisualStudio.VC.runtime-19.24.28314
com.Microsoft.Windows.rc-6.3.9600.17336
com.Microsoft.Windows.rc-10.0.10011.16384
com.Microsoft.Windows.SDK.ucrt-10.0.10240.0
com.Microsoft.Windows.SDK.ucrt-10.0.17763.0
com.Microsoft.Windows.SDK.ucrt-10.0.18362.0
com.Microsoft.Windows.SDK.um-8.1.0
com.Microsoft.Windows.SDK.um-10.0.10240.0
com.Microsoft.Windows.SDK.um-10.0.17763.0
com.Microsoft.Windows.SDK.um-10.0.18362.0
com.Microsoft.Windows.SDK.winrt-10.0.10240.0
com.Microsoft.Windows.SDK.winrt-10.0.17763.0
com.Microsoft.Windows.SDK.winrt-10.0.18362.0

[egorpugin]

Update sw and try. Later we could improve output.

[Telokis]

Thank you!
Do you display the one that SW uses by default? It could be interesting to know.

[egorpugin]

Oh, I did not mark it, by default it uses the latest version.

[Telokis]

Ok but how does it choose between msvc and clang, for instance?

[egorpugin]

There's priority: msvc->clang->...
https://github.com/SoftwareNetwork/sw/blob/master/src/sw/core/sw_context.cpp#L70

[Telokis]

Oh I have no doubt about it, I'm not really asking the behavior (I can dive in the code if needed).
I just thought it would be more user-friendly to print in the output of the command

[egorpugin]

It's ok for me to make initial implementation of features like this ticket and other your requests. But instead of tuning them precisely, I'd like to focus on more architectural questions to spend time there.

You could try to improve it further.
See changes c5c50cc