help (-h option) inconsistent between build.sh and build.cmd

[wfurt]

With Arcade changes out online documentation is often behind. It would be nice if at least build it self provides updated and accurate information.

C:\Users\toweinfu\corefx>build -?
build.ps1 [-ArchGroup <string>] [-Release] [-TargetGroup <string>] [-OSGroup <string>] [-BuildAllConfigurations] [-RuntimeOS <string>] [-OuterLoop] [-SkipTests] [-Restore] [-Clean] [-BuildTests] [-Test] [-Coverage] [-InitTools] [-ExtraArgs <string[]>] [<CommonParameters>]

but on Unix

macik2:wfurt-corefx furt$ ./build.sh -?
Invalid argument: -?
Common settings:
  --configuration <value>    Build configuration: 'Debug' or 'Release' (short: --c)
  --verbosity <value>        Msbuild verbosity: q[uiet], m[inimal], n[ormal], d[etailed], and diag[nostic] (short: -v)
  --binaryLog                Create MSBuild binary log (short: -bl)

Actions:
  --restore                  Restore dependencies (short: -r)
  --build                    Build all projects (short: -b)
  --rebuild                  Rebuild all projects
  --test                     Run all unit tests (short: -t)
  --sign                     Sign build outputs
  --publish                  Publish artifacts (e.g. symbols)
  --pack                     Package build outputs into NuGet packages and Willow components
  --help                     Print help and exit (short: -h)

Advanced settings:
  --projects <value>       Project or solution file(s) to build
  --ci                     Set when running on CI server
  --prepareMachine         Prepare machine for CI run, clean up processes after build
  --nodeReuse <value>      Sets nodereuse msbuild parameter ('true' or 'false')
  --warnAsError <value>    Sets warnaserror msbuild parameter ('true' or 'false')

Command line arguments starting with '/p:' are passed through to MSBuild.

We are missing clean, OSGroup, ArchGroup, Outerloop and perhaps other useful options.

cc: @safern @ericstj

[ViktorHofer]

We are missing clean

Clean is not an option of build.

I'm fixing the missing targets and options in dotnet/corefx#34385. That build.ps1 -? doesn't print the arcade info is unrelated to that and I'm not sure if that can be changed.

[wfurt]

thanks @ViktorHofer . This did come as feedback from some conversation when new contributors trying to help.
Also the use of "-xyz" vs "--xyz" seems inconsistent between Windows and Unix. It seems like (at least the Unix part) can take either form but it would be nice to pick one and stick to it consistently.