ioeric added inline comments.
================
Comment at: lib/Basic/FileManager.cpp:319
- SmallString<128> RealPathName;
- if (!FS->getRealPath(InterndFileName, RealPathName))
- UFE.RealPathName = RealPathName.str();
+ if (UFE.File) {
+ if (auto Path = UFE.File->getName()) {
----------------
simark wrote:
> ioeric wrote:
> > simark wrote:
> > > What's the rationale for only computing the field if `UFE.File` is
> > > non-null?
> > >
> > > Previously, if you looked up the file with `openFile == false` and then
> > > later `openFile == true`, the `RealPathName` field would not be set
> > > because of this. That doesn't seem right.
> > There has been no guarantee that RealFilePath is always set. I think that's
> > the reason why the acceasor is called tryGetRealPathName.
> The way I understood it was that it could be empty because computing the real
> path can fail. Not just because we didn't skipped computing it.
I agree that the API is confusing and lack of documentation (and we should
fix), but the previous implementation did skip the computation if File is not
available though.
================
Comment at: lib/Basic/FileManager.cpp:326
+ llvm::sys::path::remove_dots(AbsPath, /*remove_dot_dot=*/true);
+ UFE.RealPathName = AbsPath.str();
+ }
----------------
simark wrote:
> ioeric wrote:
> > simark wrote:
> > > If the path contains symlinks, doesn't this put a non-real path in the
> > > RealPathName field? Won't users (e.g. clangd) use this value thinking it
> > > is a real path, when it is actually not?
> > This was the original behavior. In general, File Manager should never call
> > real_path for users because it can be very expensive. Users should call
> > real_path if they want to resolve symlinks. That said, it's fair to say
> > that "RealPathName" is just a wrong name, and we should clean it up at some
> > point.
> Ok, then if the goal is not to actually have a real path (in the realpath(3)
> sense), that's fine. But I think we should rename the field sooner than
> later, it's really confusing.
>
> That also means that it's kind of useless for us in clangd, so we should
> always call real_path there and not rely on that field.
> Ok, then if the goal is not to actually have a real path (in the realpath(3)
> sense), that's fine. But I think we should rename the field sooner than
> later, it's really confusing.
+1
> That also means that it's kind of useless for us in clangd, so we should
> always call real_path there and not rely on that field.
I guess it depends on whether you want symlink resolution or not. I know that
clangd's index symbol collector resolves symlink explicitly, but I don't think
clangd enforces symlink resolution in general?
Repository:
rC Clang
https://reviews.llvm.org/D51159
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