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clang-tidy: work with angle brackets and external projects

Browse source 
Also fix the readme

Change-Id: I422dff5536bf01d43983621aa01035bd77ac0252
This commit is contained in:
Jade Lovelace 2024-05-23 15:16:10 -07:00 committed by jade
parent d1fa446454
commit 745b5d3d4f
3 changed files with 32 additions and 23 deletions
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43
clang-tidy/FixIncludes.cc
View file

@ -44,32 +44,41 @@ void FixIncludesCallbacks::LexedFileChanged(FileID, LexedFileChangeReason,
}
void FixIncludesCallbacks::InclusionDirective(
SourceLocation, const Token &, StringRef, bool,
SourceLocation, const Token &, StringRef FileName, bool IsAngled,
CharSourceRange FilenameRange, OptionalFileEntryRef File, StringRef,
StringRef, const Module *, SrcMgr::CharacteristicKind) {
if (Ignore)
return;
// FIXME: this is kinda evil, but this is a one-time fixup
const std::string SourceDir = "src/";
const std::vector<std::string> SourceDirs = {"src/", "include/lix/"};
if (File && File->getNameAsRequested().contains(SourceDir)) {
StringRef Name = File->getNameAsRequested();
auto Idx = Name.find(SourceDir);
assert(Idx != std::string::npos);
StringRef Suffix = Name.drop_front(Idx + SourceDir.length());
const auto Bracketize = [IsAngled](StringRef s) {
return IsAngled ? ("<" + s + ">").str() : ("\"" + s + "\"").str();
};
if (!Suffix.starts_with("lib")) {
llvm::dbgs() << "ignored: " << Suffix << "\n";
return;
for (const auto &SourceDir : SourceDirs) {
const bool IsAlreadyFixed = FileName.starts_with("lix/lib");
if (File && File->getNameAsRequested().contains(SourceDir) &&
!IsAlreadyFixed) {
StringRef Name = File->getNameAsRequested();
auto Idx = Name.find(SourceDir);
assert(Idx != std::string::npos);
std::string Suffix = Name.drop_front(Idx + SourceDir.length()).str();
if (!Suffix.starts_with("lib")) {
llvm::dbgs() << "ignored: " << Suffix << "\n";
return;
}
Suffix = "lix/" + Suffix;
auto Diag = Check.diag(FilenameRange.getBegin(),
"include needs to specify the source subdir");
Diag << FilenameRange
<< FixItHint::CreateReplacement(FilenameRange, Bracketize(Suffix));
}
auto Diag = Check.diag(FilenameRange.getBegin(),
"include needs to specify the source subdir");
Diag << FilenameRange
<< FixItHint::CreateReplacement(FilenameRange,
("\"" + Suffix + "\"").str());
}
}

8
clang-tidy/README.md
View file

@ -1,6 +1,6 @@
# Clang tidy lints for Nix
# Clang tidy lints for Lix
This is a skeleton of a clang-tidy lints library for Nix.
This is a skeleton of a clang-tidy lints library for Lix.
Currently there is one check (which is already obsolete as it has served its
goal and is there as an example), `HasPrefixSuffixCheck`.
@ -10,13 +10,13 @@ goal and is there as an example), `HasPrefixSuffixCheck`.
One file:
```
ninja -C build && clang-tidy --checks='-*,nix-*' --load=build/libnix-clang-tidy.so -p ../compile_commands.json --fix ../src/libcmd/installables.cc
ninja -C build && clang-tidy --checks='-*,lix-*' --load=build/liblix-clang-tidy.so -p ../compile_commands.json -header-filter '\.\./src/.*\.h' --fix ../src/libcmd/installables.cc
```
Several files, in parallel:
```
ninja -C build && run-clang-tidy -checks='-*,nix-*' -load=build/libnix-clang-tidy.so -p .. -fix ../src | tee -a clang-tidy-result
ninja -C build && run-clang-tidy -checks='-*,lix-*' -load=build/liblix-clang-tidy.so -p .. -header-filter '\.\./src/.*\.h' -fix ../src | tee -a clang-tidy-result
```
## Resources

4
doc/manual/rl-next/rename-lixexpr.md
View file

@ -22,10 +22,10 @@ Migration path:
To apply this migration automatically, remove all `<nix/>` from includes, so `#include <nix/expr.hh>` -> `#include <expr.hh>`.
Then, the correct paths will be resolved from the tangled mess, and the clang-tidy automated fix will work.
Then run the following for out of tree projects:
Then run the following for out of tree projects (header filter is set to only fix instances in headers in `../src` relative to the compiler's working directory, as would be the case in nix-eval-jobs or other things built with meson, e.g.):
```console
lix_root=$HOME/lix
(cd $lix_root/clang-tidy && nix develop -c 'meson setup build && ninja -C build')
run-clang-tidy -checks='-*,lix-fixincludes' -load=$lix_root/clang-tidy/build/liblix-clang-tidy.so -p build/ -fix src
run-clang-tidy -checks='-*,lix-fixincludes' -load=$lix_root/clang-tidy/build/liblix-clang-tidy.so -p build/ -header-filter '\.\./src/.*\.h' -fix src
```