mkosi: fix build script to use right sysvinit path

On Fedora /etc/init.d is a symlink to /etc/rc.d/init.d. Our build
scripts default to /etc/init.d since that is the LSB default. Let's make
sure the build script thus follows the symlink correctly and configures
to path explicitly, since otherwise our build artifacts in $DESTDIR are
incompatible with the setup we actually need for Fedora.

diff --git a/mkosi.build b/mkosi.build
index 456217f..7125192 100755 (executable)
--- a/mkosi.build
+++ b/mkosi.build
@@ -26,7 +26,9 @@
 
 export LC_CTYPE=en_US.UTF-8
 
-[ -f "$BUILDDIR"/build.ninja ] || meson "$BUILDDIR"
+sysvinit_path=`realpath /etc/init.d`
+
+[ -f "$BUILDDIR"/build.ninja ] || meson "$BUILDDIR" -D "sysvinit-path=$sysvinit_path"
 ninja -C "$BUILDDIR" all
 [ "$WITH_TESTS" = 0 ] || ninja -C "$BUILDDIR" test || ( RET="$?" ; cat "$BUILDDIR"/meson-logs/testlog.txt ; exit "$RET" )
 ninja -C "$BUILDDIR" install