[PATCH] D117730: [DNM][VFS] Do not overwrite the path when nesting RedirectingFileSystems

[Duncan P. N. Exon Smith via Phabricator via cfe-commits]

dexonsmith added inline comments.


================
Comment at: clang/test/VFS/directory.c:2
 // RUN: rm -rf %t
-// RUN: mkdir -p %t/Underlying
-// RUN: mkdir -p %t/Overlay
-// RUN: mkdir -p %t/Middle
-// RUN: echo '// B.h in Underlying' > %t/Underlying/B.h
-// RUN: echo '#ifdef NESTED' >> %t/Underlying/B.h
-// RUN: echo '#include "C.h"' >> %t/Underlying/B.h
-// RUN: echo '#endif' >> %t/Underlying/B.h
-// RUN: echo '// C.h in Underlying' > %t/Underlying/C.h
-// RUN: echo '// C.h in Middle' > %t/Middle/C.h
-// RUN: echo '// C.h in Overlay' > %t/Overlay/C.h
-
-// 1) Underlying -> Overlay (C.h found, B.h falling back to Underlying)
-// RUN: sed -e "s at INPUT_DIR@%{/t:regex_replacement}/Overlay at g" -e "s at OUT_DIR@%{/t:regex_replacement}/Underlying at g" %S/Inputs/vfsoverlay-directory.yaml > %t/vfs.yaml
-// RUN: %clang_cc1 -Werror -I %t/Underlying -ivfsoverlay %t/vfs.yaml -fsyntax-only -E -C %s 2>&1 | FileCheck --check-prefix=DIRECT %s
-// RUN: %clang_cc1 -Werror -I %t/Underlying -ivfsoverlay %t/vfs.yaml -fsyntax-only -DNESTED -E -C %s 2>&1 | FileCheck --check-prefix=DIRECT %s
-// RUN: sed -e "s at INPUT_DIR@Overlay at g" -e "s at OUT_DIR@%{/t:regex_replacement}/Underlying at g" %S/Inputs/vfsoverlay-directory-relative.yaml > %t/vfs-relative.yaml
-// RUN: %clang_cc1 -Werror -I %t/Underlying -ivfsoverlay %t/vfs-relative.yaml -fsyntax-only -E -C %s 2>&1 | FileCheck --check-prefix=DIRECT %s
-
-// DIRECT: {{^}}// B.h in Underlying
-// DIRECT: {{^}}// C.h in Overlay
-
-// 2) Underlying -> Middle -> Overlay (C.h found, B.h falling back to Underlying)
-// RUN: sed -e "s at INPUT_DIR@%{/t:regex_replacement}/Overlay at g" -e "s at OUT_DIR@%{/t:regex_replacement}/Middle at g" %S/Inputs/vfsoverlay-directory.yaml > %t/vfs.yaml
-// RUN: sed -e "s at INPUT_DIR@%{/t:regex_replacement}/Middle at g" -e "s at OUT_DIR@%{/t:regex_replacement}/Underlying at g" %S/Inputs/vfsoverlay-directory.yaml > %t/vfs2.yaml
-// RUN: %clang_cc1 -Werror -I %t/Underlying -ivfsoverlay %t/vfs.yaml -ivfsoverlay %t/vfs2.yaml -fsyntax-only -E -C %s 2>&1 | FileCheck --check-prefix=DIRECT %s
-// RUN: %clang_cc1 -Werror -I %t/Underlying -ivfsoverlay %t/vfs.yaml -ivfsoverlay %t/vfs2.yaml -DNESTED -fsyntax-only -E -C %s 2>&1 | FileCheck --check-prefix=DIRECT %s
-
-// Same as direct above
-
-// 3) Underlying -> Middle -> Overlay (C.h falling back to Middle, B.h falling back to Underlying)
-// RUN: rm -f %t/Overlay/C.h
-// RUN: %clang_cc1 -Werror -I %t/Underlying -ivfsoverlay %t/vfs.yaml -ivfsoverlay %t/vfs2.yaml -fsyntax-only -E -C %s 2>&1 | FileCheck --check-prefix=FALLBACK %s
-
-// FALLBACK: {{^}}// B.h in Underlying
-// FALLBACK: {{^}}// C.h in Middle
-
-// 3) Underlying -> Middle -> Overlay (C.h falling back to Underlying, B.h falling back to Underlying)
+// RUN: split-file %s %t
+
----------------
bnbarham wrote:
> dexonsmith wrote:
> > This makes it hard to read what has changed. Probably better to commit an NFC patch (updating the testcase with no behaviour change) and then rebase this patch on top.
> Yep, to be clear this is very much a WIP PR - I mostly put it up to get some feedback. I expect there to be a fair bit to clean up.
> 
> The only thing actually *changed* here is the addition of checking the path that was written out as well. The rest was to help me understand what was actually going on originally, I'll probably just revert and just add the path if we do end up wanting this (unless people prefer split-file).
Just that it's hard to read the WIP PR with the noise of the unrelated change; if the testcase is easier to read with split-file seems like it'd be nice to land the improvement, but up to you.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D117730/new/

https://reviews.llvm.org/D117730