# This Dockerfile extracts the source code and headers from a kernel package,
# builds the perf utility, and places it into a scratch image
ARG BUILD_IMAGE
ARG KERNEL_VERSION
ARG PKG_HASH

FROM linuxkit/kernel:${KERNEL_VERSION}-${PKG_HASH} as ksrc

FROM ${BUILD_IMAGE} AS build
RUN apk add \
    argp-standalone \
    bash \
    bc \
    binutils-dev \
    bison \
    build-base \
    diffutils \
    flex \
    git \
    gmp-dev \
    installkernel \
    kmod \
    elfutils-dev \
    findutils \
    libelf-static \
    mpc1-dev \
    mpfr-dev \
    python3 \
    python3-dev \
    sed \
    tar \
    xz \
    xz-dev \
    zlib-dev \
    zlib-static \
    zstd \
    zstd-static

COPY --from=ksrc /linux.tar.xz /kernel-headers.tar /
RUN tar xf linux.tar.xz && \
    tar xf kernel-headers.tar

# download and build libtraceevent.a

WORKDIR /build
ENV LIBTRACE_COMMIT=libtraceevent-1.8.2
RUN git clone https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git && \
    cd libtraceevent && \
    git checkout $LIBTRACE_COMMIT

RUN make -C libtraceevent all install V=1

WORKDIR /linux

RUN mkdir -p /out && \
    make -C tools/perf EXTRA_CFLAGS="-Wno-alloc-size -Wno-calloc-transposed-args" LDFLAGS=-static V=1 && \
    strip tools/perf/perf && \
    cp tools/perf/perf /out

FROM scratch
ENTRYPOINT []
CMD []
WORKDIR /
COPY --from=build /out/perf /usr/bin/perf