1 files changed, 93 insertions, 0 deletions
diff --git a/mkosi.images/system/mkosi.conf.d/10-arch/mkosi.build.chroot b/mkosi.images/system/mkosi.conf.d/10-arch/mkosi.build.chroot
new file mode 100755
index 0000000..1f6e0c3
--- /dev/null
+++ b/mkosi.images/system/mkosi.conf.d/10-arch/mkosi.build.chroot
@@ -0,0 +1,93 @@
+#!/bin/bash
+# SPDX-License-Identifier: LGPL-2.1-or-later
+set -e
+
+if ((NO_BUILD)); then
+    exit 0
+fi
+
+# shellcheck source=/dev/null
+. /usr/lib/os-release
+
+if [ ! -f "pkg/$ID/PKGBUILD" ]; then
+    echo "PKGBUILD not found at pkg/$ID/PKGBUILD, run mkosi once with -ff to make sure the PKGBUILD is cloned" >&2
+    exit 1
+fi
+
+# We can't configure the source or build directory so we use symlinks instead to make sure they are in the
+# expected locations.
+ln --symbolic "$SRCDIR" "pkg/$ID/systemd-stable"
+ln --symbolic "$BUILDDIR" "pkg/$ID/build"
+# Because we run with --noextract we are responsible for making sure the source files appear in src/.
+ln --symbolic . "pkg/$ID/src"
+
+MKOSI_CFLAGS="-O0 -Wp,-U_FORTIFY_SOURCE"
+if ((LLVM)); then
+    # TODO: Remove -fno-sanitize-function when https://github.com/systemd/systemd/issues/29972 is fixed.
+    MKOSI_CFLAGS="$MKOSI_CFLAGS -shared-libasan -fno-sanitize=function"
+fi
+
+MKOSI_LDFLAGS=""
+if ((LLVM)) && [[ -n "$SANITIZERS" ]]; then
+    MKOSI_LDFLAGS="$MKOSI_LDFLAGS -Wl,-rpath=$(clang --print-file-name="")lib/linux"
+fi
+
+MKOSI_MESON_OPTIONS="-D mode=developer -D b_sanitize=${SANITIZERS:-none}"
+if ((WIPE)); then
+    MKOSI_MESON_OPTIONS="$MKOSI_MESON_OPTIONS --wipe"
+fi
+
+# Override the default options. We specifically disable "strip", "zipman" and "lto" as they slow down builds
+# significantly. OPTIONS= cannot be overridden on the makepkg command line so we append to /etc/makepkg.conf
+# instead. The rootfs is overlaid with a writable tmpfs during the build script so these changes don't end up
+# in the image itself.
+tee --append /etc/makepkg.conf >/dev/null <<EOF
+export CC="$( ((LLVM)) && echo clang || echo gcc)"
+export CXX="$( ((LLVM)) && echo clang++ || echo g++)"
+export CC_LD="$( ((LLVM)) && echo lld)"
+export CXX_LD="$( ((LLVM)) && echo lld)"
+export CFLAGS="\$CFLAGS $MKOSI_CFLAGS $CFLAGS"
+export CXXFLAGS="\$CXXFLAGS $MKOSI_CFLAGS $CFLAGS"
+export LDFLAGS="\$LDFLAGS $MKOSI_LDFLAGS $LDFLAGS"
+OPTIONS=(
+    docs
+    !libtool
+    !staticlibs
+    emptydirs
+    !zipman
+    purge
+    $( ((WITH_DEBUG)) && echo strip || echo !strip)
+    $( ((WITH_DEBUG)) && echo debug || echo !debug)
+    !lto
+)
+EOF
+
+# Linting the PKGBUILD takes multiple seconds every build so avoid that by nuking all the linting functions.
+rm /usr/share/makepkg/lint_pkgbuild/*
+
+if [ -d .git/ ] && [ -z "$(git status --porcelain)" ]; then
+    TS="$(git show --no-patch --format=%ct HEAD)"
+else
+    TS="${SOURCE_DATE_EPOCH:-$(date +%s)}"
+fi
+
+sed --in-place "pkg/$ID/PKGBUILD" \
+    --expression "s/^_tag=.*/_tag=$(cat meson.version)/" \
+    --expression "s/^pkgrel=.*/pkgrel=$(date "+%Y%m%d%H%M%S" --date "@$TS")/"
+
+# We get around makepkg's root check by setting EUID to something else.
+# shellcheck disable=SC2046
+env --chdir="pkg/$ID" \
+    EUID=123 \
+    makepkg \
+    --noextract \
+    $( ((WITH_TESTS)) || echo --nocheck) \
+    --force \
+    _systemd_UPSTREAM=1 \
+    _systemd_QUIET=$( ((MESON_VERBOSE)); echo $? ) \
+    BUILDDIR="$PWD/pkg/$ID" \
+    PKGDEST="$OUTPUTDIR" \
+    PKGEXT=".pkg.tar" \
+    MESON_EXTRA_CONFIGURE_OPTIONS="$MKOSI_MESON_OPTIONS $MESON_OPTIONS"
+
+cp "$OUTPUTDIR"/*.pkg.tar "$PACKAGEDIR"