thakis added a comment.

> Thanks for doing this, I am struggling to find the MacOS bot log that failed, 
> are any available via Buildbot? (I notice the log looks like your own machine)

The mac bots are on a different system for some reason: 
http://green.lab.llvm.org/green/ (see also 
http://lists.llvm.org/pipermail/llvm-dev/2019-October/135771.html , I wasn't 
aware of that until a few days ago either).

> So as you said it will be a little slower to build clang-format, however, I 
> do notice that all the other clang/tools are pretty much are all building 
> with Frontend. so anyone building a larger range of clang tools probably has 
> everything already built.

I believe all the other clang tools conceptually do semantic analysis, so that 
makes more sense for them :)

> I think the main build failure was just the lit tests, I think i would prefer 
> to fix those and reland this as-is, then look for a better diags solution if 
> @klimek thinks this is something I should be concerned about. I really wanted 
> to be able to use a standard Diagnostic front end with all the support for 
> console coloring etc...I'll have to take a look at LLVM's diagnostics to see 
> how that is done.

I hope my view on this isn't entirely dismissed (see `git shortlog -nes 
clang/lib/Format/`).

In addition to the actual size cost of this change: about a third of 
clang-format's size is the diagnostics table, but before this change here it's 
kept alive by only two references from lib/Basic and it's reasonably easy to 
remove these, which should make the binary 1 MB smaller. After this change, 
that's much harder to do.

LLVM's text diag stuff also supports colors and whatnot.

And another idea: maybe it makes sense to expose these clang-format diagnostics 
you're adding (which I do think are a cool feature!) via clang-format? That 
already depends on everything and the kitchen sync, so you could easily output 
diagnostics from there – and it'd allow clang-format itself to be a tool 
focused on doing one thing well (namely, formatting code).


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D68554/new/

https://reviews.llvm.org/D68554



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