[clang] [clang-format] Add option to remove leading blank lines (PR #91221)

Mon Jun 24 21:09:48 PDT 2024

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-aarch64-sve-vla-2stage` running on `linaro-g3-03` while building `clang` at step 6 "build stage 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/41/builds/269

Here is the relevant piece of the build log for the reference:
```
Step 6 (build stage 1) failure: 'ninja' (failure)
...
clang++: warning: argument unused during compilation: '-mllvm -scalable-vectorization=preferred' [-Wunused-command-line-argument]
clang++: warning: argument unused during compilation: '-mllvm -treat-scalable-fixed-error-as-warning=false' [-Wunused-command-line-argument]
[2076/2551] Building CXX object tools/clang/tools/extra/tool-template/CMakeFiles/tool-template.dir/ToolTemplate.cpp.o
[2077/2551] Building CXX object tools/clang/tools/extra/clangd/refactor/tweaks/CMakeFiles/obj.clangDaemonTweaks.dir/MemberwiseConstructor.cpp.o
[2078/2551] Building CXX object tools/clang/tools/extra/clang-tidy/bugprone/CMakeFiles/obj.clangTidyBugproneModule.dir/StringviewNullptrCheck.cpp.o
[2079/2551] Building CXX object tools/clang/tools/extra/clangd/refactor/tweaks/CMakeFiles/obj.clangDaemonTweaks.dir/DefineOutline.cpp.o
[2080/2551] Building CXX object tools/clang/tools/extra/clangd/refactor/tweaks/CMakeFiles/obj.clangDaemonTweaks.dir/PopulateSwitch.cpp.o
[2081/2551] Building CXX object tools/clang/tools/extra/clangd/refactor/tweaks/CMakeFiles/obj.clangDaemonTweaks.dir/ObjCMemberwiseInitializer.cpp.o
[2082/2551] Building CXX object tools/clang/tools/extra/clangd/refactor/tweaks/CMakeFiles/obj.clangDaemonTweaks.dir/RawStringLiteral.cpp.o
[2083/2551] Building CXX object tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/Format.cpp.o
FAILED: tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/Format.cpp.o 
/usr/local/bin/c++ -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1/tools/clang/tools/extra/clangd -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/clang-tools-extra/clangd -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/clang-tools-extra/clangd/../include-cleaner/include -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1/tools/clang/tools/extra/clangd/../clang-tidy -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/clang/include -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1/tools/clang/include -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1/include -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/llvm/include -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/clang-tools-extra/pseudo/lib/../include -mcpu=neoverse-512tvb -mllvm -scalable-vectorization=preferred -mllvm -treat-scalable-fixed-error-as-warning=false -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -fno-common -Woverloaded-virtual -Wno-nested-anon-types -O3 -DNDEBUG  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -std=c++17 -MD -MT tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/Format.cpp.o -MF tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/Format.cpp.o.d -o tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/Format.cpp.o -c /home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/clang-tools-extra/clangd/Format.cpp
../llvm/clang-tools-extra/clangd/Format.cpp:284:11: error: no member named 'KeepEmptyLinesAtTheStartOfBlocks' in 'clang::format::FormatStyle'
  284 |     Style.KeepEmptyLinesAtTheStartOfBlocks = true;
      |     ~~~~~ ^
1 error generated.
[2084/2551] Building CXX object tools/clang/tools/extra/clangd/refactor/tweaks/CMakeFiles/obj.clangDaemonTweaks.dir/SwapIfBranches.cpp.o
[2085/2551] Building CXX object tools/clang/tools/extra/clangd/refactor/tweaks/CMakeFiles/obj.clangDaemonTweaks.dir/DefineInline.cpp.o
[2086/2551] Building CXX object tools/clang/tools/extra/clangd/refactor/tweaks/CMakeFiles/obj.clangDaemonTweaks.dir/ScopifyEnum.cpp.o
[2087/2551] Building CXX object tools/clang/tools/extra/clang-change-namespace/CMakeFiles/obj.clangChangeNamespace.dir/ChangeNamespace.cpp.o
[2088/2551] Building CXX object tools/clang/tools/extra/clang-tidy/bugprone/CMakeFiles/obj.clangTidyBugproneModule.dir/BugproneTidyModule.cpp.o
[2089/2551] Building CXX object tools/clang/tools/extra/clang-tidy/CMakeFiles/obj.clangTidy.dir/ClangTidy.cpp.o
[2090/2551] Building CXX object tools/clang/tools/extra/clangd/refactor/tweaks/CMakeFiles/obj.clangDaemonTweaks.dir/SpecialMembers.cpp.o
[2091/2551] Building CXX object tools/clang/tools/extra/clangd/tool/CMakeFiles/obj.clangdMain.dir/Check.cpp.o
[2092/2551] Building CXX object tools/clang/tools/extra/clangd/tool/CMakeFiles/obj.clangdMain.dir/ClangdMain.cpp.o
[2093/2551] Building CXX object tools/clang/tools/extra/include-cleaner/lib/CMakeFiles/obj.clangIncludeCleaner.dir/WalkAST.cpp.o
[2094/2551] Building CXX object tools/clang/tools/extra/clang-move/CMakeFiles/obj.clangMove.dir/Move.cpp.o
[2095/2551] Building CXX object tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/CollectMacros.cpp.o
[2096/2551] Building CXX object tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/GlobalCompilationDatabase.cpp.o
[2097/2551] Building CXX object tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/ASTSignals.cpp.o
[2098/2551] Building CXX object tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/index/BackgroundIndexLoader.cpp.o
[2099/2551] Building CXX object tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/HeaderSourceSwitch.cpp.o
[2100/2551] Building CXX object tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/Quality.cpp.o
[2101/2551] Building CXX object tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/SemanticSelection.cpp.o
[2102/2551] Building CXX object tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/Headers.cpp.o
[2103/2551] Building CXX object tools/clang/lib/Tooling/Refactoring/CMakeFiles/obj.clangToolingRefactoring.dir/Rename/USRLocFinder.cpp.o
[2104/2551] Building CXX object tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/FindSymbols.cpp.o
[2105/2551] Building CXX object tools/clang/tools/extra/clangd/refactor/tweaks/CMakeFiles/obj.clangDaemonTweaks.dir/AddUsing.cpp.o
[2106/2551] Building CXX object tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/IncludeCleaner.cpp.o
[2107/2551] Building CXX object tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/IncludeFixer.cpp.o
[2108/2551] Building CXX object tools/clang/tools/extra/clangd/refactor/tweaks/CMakeFiles/obj.clangDaemonTweaks.dir/ExtractVariable.cpp.o
[2109/2551] Building CXX object tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/SourceCode.cpp.o
[2110/2551] Building CXX object tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/Diagnostics.cpp.o
[2111/2551] Building CXX object tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/index/Background.cpp.o
[2112/2551] Building CXX object tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/Hover.cpp.o
[2113/2551] Building CXX object tools/clang/tools/extra/clangd/refactor/tweaks/CMakeFiles/obj.clangDaemonTweaks.dir/RemoveUsingNamespace.cpp.o
[2114/2551] Building CXX object tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/TUScheduler.cpp.o
[2115/2551] Building CXX object tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/Preamble.cpp.o
[2116/2551] Building CXX object tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/ClangdServer.cpp.o

```

https://github.com/llvm/llvm-project/pull/91221