File: mkosi.build

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#!/bin/sh
set -ex

# This is a build script for OS image generation using mkosi (https://github.com/systemd/mkosi).
# Simply invoke "mkosi" in the project directory to build an OS image.

# Reset the permissions of the tree. Since Meson keeps the permissions
# all the way to the installed files, reset them to one of 0644 or 0755
# so the files keep those permissions, otherwise details of what umask
# was set at the time the git tree was cloned will leak all the way
# through. Also set umask explicitly during the build.
chmod -R u+w,go-w,a+rX .
umask 022

# If mkosi.builddir/ exists mkosi will set $BUILDDIR to it, let's then use it
# as out-of-tree build dir. Otherwise, let's make up our own builddir.
[ -z "$BUILDDIR" ] && BUILDDIR=build

# Meson uses Python 3 and requires a locale with an UTF-8 character map.
# Not running under UTF-8 makes the `ninja test` step break with a CodecError.
# So let's ensure we're running under UTF-8.
#
# If our current locale already is UTF-8, then we don't need to do anything:
if [ "$(locale charmap)" != "UTF-8" ] ; then
        # Try using C.UTF-8 locale, if available. This locale is not shipped
        # by upstream glibc, so it's not available in all distros.
        # (In particular, it's not available in Arch Linux.)
        export LC_CTYPE=C.UTF-8
        if [ "$(locale charmap)" != "UTF-8" ] ; then
                # Finally, try something like en_US.UTF-8, which should be
                # available in Arch Linux, but is not present in Debian's
                # minimal image in our mkosi config.
                export LC_CTYPE=en_US.UTF-8
                if [ "$(locale charmap)" != "UTF-8" ] ; then
                        # If nothing works, fail early.
                        echo "*** Could not find a valid locale that supports UTF-8. ***" >&2
                        exit 1
                fi
        fi
fi

if [ ! -f "$BUILDDIR"/build.ninja ] ; then
        sysvinit_path=`realpath /etc/init.d`

        nobody_user=`id -u -n 65534 2> /dev/null`
        if [ "$nobody_user" != "" ] ; then
                # Validate that we can translate forth and back
                if [ "`id -u $nobody_user`" != 65534 ] ; then
                        nobody_user=""
                fi
        fi
        if [ "$nobody_user" = "" ] ; then
                if id -u nobody 2> /dev/null ; then
                        # The "nobody" user is defined already for something else, pick the Fedora name
                        nobody_user=nfsnobody
                else
                        # The "nobody" user name is free, use it
                        nobody_user=nobody
                fi
        fi

        nobody_group=`id -g -n 65534 2> /dev/null`
        if [ "$nobody_group" != "" ] ; then
                # Validate that we can translate forth and back
                if [ "`id -g $nobody_group`" != 65534 ] ; then
                        nobody_group=""
                fi
        fi
        if [ "$nobody_group" = "" ] ; then
                if id -u nobody 2> /dev/null ; then
                        # The "nobody" group is defined already for something else, pick the Fedora name
                        nobody_group=nfsnobody
                else
                        # The "nobody" group name is free, use it
                        nobody_group=nobody
                fi
        fi

        meson "$BUILDDIR" -D "sysvinit-path=$sysvinit_path" -D default-hierarchy=unified -D man=false -D "nobody-user=$nobody_user" -D "nobody-group=$nobody_group"
fi

ninja -C "$BUILDDIR" all
[ "$WITH_TESTS" = 0 ] || ninja -C "$BUILDDIR" test
ninja -C "$BUILDDIR" install

mkdir -p "$DESTDIR"/etc

cat > "$DESTDIR"/etc/issue <<EOF
\S (built from systemd tree)
Kernel \r on an \m (\l)

EOF

# Manually update the boot loader from the one we just built
mkdir -p "$DESTDIR"/boot/efi/EFI/systemd "$DESTDIR"/boot/efi/EFI/BOOT
cp "$DESTDIR"/usr/lib/systemd/boot/efi/systemd-bootx64.efi "$DESTDIR"/boot/efi/EFI/systemd/systemd-bootx64.efi
cp "$DESTDIR"/usr/lib/systemd/boot/efi/systemd-bootx64.efi "$DESTDIR"/boot/efi/EFI/BOOT/bootx64.efi