# Build only the clang-format tool out of LLVM/Clang, as a statically linked
# binary installed as /usr/bin/clang-format-22 (coexists with the distro clang).
# The git-clang-format / clang-format-diff helper scripts go into the
# python-dependent -tools subpackage.

%global maj_ver 22

Name:           clang-format-%{maj_ver}
Version:        22.1.7
Release:        2%{?dist}
Summary:        Standalone, statically linked clang-format from LLVM %{maj_ver}

License:        Apache-2.0 WITH LLVM-exception
URL:            https://github.com/llvm/llvm-project
# Since LLVM 22 upstream no longer publishes per-project source tarballs
# (llvm-/clang-/cmake-*.src.tar.xz); only the monolithic tree is released.
Source0:        %{url}/releases/download/llvmorg-%{version}/llvm-project-%{version}.src.tar.xz

# A fully static binary carries no shared-library symbols, so there is no
# debuginfo to extract and no .so to ldconfig.
%define debug_package %{nil}

BuildRequires:  cmake >= 3.20.0
BuildRequires:  ninja-build
BuildRequires:  gcc
BuildRequires:  gcc-c++
BuildRequires:  make
BuildRequires:  python3
BuildRequires:  xz
# needed to link -static
BuildRequires:  glibc-static
BuildRequires:  libstdc++-static

%description
clang-format reformats C/C++/Java/JavaScript/JSON/Objective-C/Protobuf/C#
source according to a configurable style. This package provides the
clang-format tool from LLVM/Clang %{version} as a self-contained statically
linked executable, installed under %{_libdir}/llvm%{maj_ver} with a versioned
clang-format-%{maj_ver} symlink in %{_bindir}. The python-based helper
scripts live in the %{name}-tools subpackage.

%package tools
Summary:        git-clang-format and clang-format helper scripts for LLVM %{maj_ver}
Requires:       %{name} = %{version}-%{release}
# git-clang-format needs git at runtime
Recommends:     git-core

%description tools
git-clang-format-%{maj_ver}, clang-format-diff-%{maj_ver} and the editor
integration scripts (vim, emacs, sublime) for clang-format-%{maj_ver}.
Unlike the statically linked binary, these need python3 at runtime.

%prep
rm -rf llvm-project build
tar -xf %{SOURCE0}
mv llvm-project-%{version}.src llvm-project

%build
# CMAKE_SKIP_RPATH: cmake --install would otherwise try to rewrite the build
# RPATH to $ORIGIN/../lib, which fails on a fully static binary (no ELF
# dynamic section).
cmake -G Ninja -S llvm-project/llvm -B build \
    -DCMAKE_BUILD_TYPE=Release \
    -DCMAKE_INSTALL_PREFIX=%{_libdir}/llvm%{maj_ver} \
    -DCMAKE_SKIP_RPATH=ON \
    -DLLVM_ENABLE_PROJECTS=clang \
    -DLLVM_TARGETS_TO_BUILD=X86 \
    -DLLVM_APPEND_VC_REV=OFF \
    -DBUILD_SHARED_LIBS=OFF \
    -DLLVM_BUILD_LLVM_DYLIB=OFF \
    -DLLVM_LINK_LLVM_DYLIB=OFF \
    -DLLVM_ENABLE_PIC=OFF \
    -DLLVM_BUILD_TOOLS=OFF \
    -DLLVM_INCLUDE_TESTS=OFF \
    -DLLVM_INCLUDE_EXAMPLES=OFF \
    -DLLVM_INCLUDE_BENCHMARKS=OFF \
    -DLLVM_ENABLE_ZLIB=OFF \
    -DLLVM_ENABLE_ZSTD=OFF \
    -DLLVM_ENABLE_LIBXML2=OFF \
    -DLLVM_ENABLE_LIBEDIT=OFF \
    -DCLANG_ENABLE_STATIC_ANALYZER=OFF \
    -DCLANG_ENABLE_ARCMT=OFF \
    -DCMAKE_EXE_LINKER_FLAGS="-static -static-libgcc -static-libstdc++"

cmake --build build --target clang-format

%install
# Patch the helper scripts to invoke the versioned binary by default since
# this package puts no unversioned clang-format on PATH.
scripts=llvm-project/clang/tools/clang-format
sed -i "s/\([\"']\)clang-format\1/\1clang-format-%{maj_ver}\1/g" \
    $scripts/git-clang-format $scripts/clang-format-diff.py \
    $scripts/clang-format.py $scripts/clang-format-sublime.py $scripts/clang-format.el

# Upstream install rules cover the binary and all helper scripts.
DESTDIR=%{buildroot} cmake --install build --component clang-format --strip

# Versioned entry points, coexisting with the distro clang.
mkdir -p %{buildroot}%{_bindir}
ln -s ../%{_lib}/llvm%{maj_ver}/bin/clang-format %{buildroot}%{_bindir}/clang-format-%{maj_ver}
ln -s ../%{_lib}/llvm%{maj_ver}/bin/git-clang-format %{buildroot}%{_bindir}/git-clang-format-%{maj_ver}
ln -s ../%{_lib}/llvm%{maj_ver}/share/clang/clang-format-diff.py %{buildroot}%{_bindir}/clang-format-diff-%{maj_ver}

%check
# Confirm the produced binary is actually static and runs.
file %{buildroot}%{_libdir}/llvm%{maj_ver}/bin/clang-format
%{buildroot}%{_bindir}/clang-format-%{maj_ver} --version
# Confirm the patched scripts still parse and run.
%{buildroot}%{_bindir}/clang-format-diff-%{maj_ver} --help >/dev/null
python3 -m py_compile llvm-project/clang/tools/clang-format/git-clang-format

%files
%license llvm-project/llvm/LICENSE.TXT
%{_bindir}/clang-format-%{maj_ver}
%dir %{_libdir}/llvm%{maj_ver}
%dir %{_libdir}/llvm%{maj_ver}/bin
%{_libdir}/llvm%{maj_ver}/bin/clang-format

%files tools
%license llvm-project/llvm/LICENSE.TXT
%{_bindir}/clang-format-diff-%{maj_ver}
%{_bindir}/git-clang-format-%{maj_ver}
%{_libdir}/llvm%{maj_ver}/bin/git-clang-format
%{_libdir}/llvm%{maj_ver}/share/

%changelog
* Sat Aug 08 2026 Yuki Yamaura <yamaura@pezy.co.jp> 22.1.7-2
- Install the upstream clang-format component (binary, git-clang-format,
  clang-format-diff.py, editor scripts) under %%{_libdir}/llvm22 via cmake --install
- Add versioned symlinks clang-format-22, git-clang-format-22 and
  clang-format-diff-22 in /usr/bin
- Split the python-dependent scripts into the -tools subpackage

* Sat Jun 06 2026 Yuki Yamaura <yamaura@pezy.co.jp> 22.1.7-1
- Initial package: standalone static clang-format from LLVM 22.1.7