fixed iwyu

Author: StephanKa

.devcontainer/Dockerfile

@@ -79,26 +79,13 @@ RUN apt-get update -qq && export DEBIAN_FRONTEND=noninteractive && \
         doxygen graphviz ccache cppcheck xz-utils
 
 # Install include-what-you-use
-ENV IWYU /home/iwyu
-ENV IWYU_BUILD ${IWYU}/build
-ENV IWYU_SRC ${IWYU}/include-what-you-use
-RUN mkdir -p ${IWYU_BUILD} && \
-    git clone --branch clang_${LLVM_VER} \
-        https://github.com/include-what-you-use/include-what-you-use.git \
-        ${IWYU_SRC}
-RUN CC=clang-${LLVM_VER} CXX=clang++-${LLVM_VER} cmake -S ${IWYU_SRC} \
-        -B ${IWYU_BUILD} \
-        -G "Unix Makefiles" -DCMAKE_PREFIX_PATH=/usr/lib/llvm-${LLVM_VER} && \
-    cmake --build ${IWYU_BUILD} -j && \
-    cmake --install ${IWYU_BUILD}
-
-# Per https://github.com/include-what-you-use/include-what-you-use#how-to-install:
-# `You need to copy the Clang include directory to the expected location before
-#  running (similarly, use include-what-you-use -print-resource-dir to learn
-#  exactly where IWYU wants the headers).`
-RUN mkdir -p $(include-what-you-use -print-resource-dir 2>/dev/null)
-RUN ln -s $(readlink -f /usr/lib/clang/${LLVM_VER}/include) \
-    $(include-what-you-use -print-resource-dir 2>/dev/null)/include
+RUN mkdir iwyu && cd iwyu \
+    && git clone --branch clang_${LLVM_VER} https://github.com/include-what-you-use/include-what-you-use.git \
+    && mkdir build && cd build \
+    && cmake -G "Ninja" -DCMAKE_PREFIX_PATH=/usr/lib/llvm-${LLVM_VER} ../include-what-you-use \
+    && sudo ninja install \
+    && cd ../.. \
+    && rm -rf iwyu
 
 ## Cleanup cached apt data we don't need anymore
 RUN apt-get autoremove -y && apt-get clean && \