make suggest_setup help messages better

[henryboisdequin]

When I first built the compiler and didn't create a config.toml.example, the following was emitted:

help: consider running `x.py setup` or copying `config.toml.example`

I ran x.py setup but got an error so in this PR I made the help messages a little clearer.

[rust-highfive]

r? @Mark-Simulacrum

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[jyn514]

Hmm, I intentionally left out ./ originally because I think it breaks on Windows. I guess windows users are used to seeing that and ignoring it though? We do use it in a bunch of the other documentation. @rylev @scottmcm you use windows, right, what do you think?

[scottmcm]

I used to have an x.bat that ran things low-priority, but now that the toml for that works, I haven't bothered, and just do

C:\src\rust>python x.py test --stage 1 --keep-stage 0 library\core --test-args sum
Updating only changed submodules
Submodules updated in 0.15 seconds
...

Because neither just x.py nor .\x.py work. python ./x.py test does work, though, so I don't think having the ./ in the docs is a problem.

[jyn514]

Thanks, sounds like we could improve the Windows experience but this change won't hurt anything.

@bors r+ rollup

[bors]

📌 Commit e13f25c has been approved by jyn514

[henryboisdequin]

@jyn514 just an idea: couldn't we detect which OS the user was on and give a message based on that (that's for another PR though)

[jyn514]

@jyn514 just an idea: couldn't we detect which OS the user was on and give a message based on that (that's for another PR though)

For something this small I don't think it's worth it. I would rather try to get x.py build (without python first) working on Windows.

[rylev]

@scottmcm @jyn514 I'm not sure why, but x.py works for me in cmd.exe. In PowerShell (which I normally use) I get an error, but PowerShell 7 helpfully recognizes that there is a command called x.py in my current directory and prompts me to try .\x.py which does work. I'm not sure if I have a different python setup than @scottmcm that makes this work.