mkosi: Use distro-invariant rootprefix

Distributions may be build with various configs, e.g. customized
rootprefix. It'd be unmaintanable to have specific mkosi.build for each
supported distro. Hence, make the build script flexible yet distro
oblivious.

diff --git a/mkosi.build b/mkosi.build
index 16ac2e9d0d6952949b1be240962d94167666df77..fc09baeadd0ba2ccf714510767fcec8f744600ea 100755 (executable)
--- a/mkosi.build
+++ b/mkosi.build
@@ -42,6 +42,14 @@ fi
 if [ ! -f "$BUILDDIR"/build.ninja ] ; then
         sysvinit_path=`realpath /etc/init.d`
 
+        init_path=`realpath /sbin/init 2>/dev/null`
+        if [ -z "$init_path" ] ; then
+            rootprefix=""
+        else
+            rootprefix=${init_path%/lib/systemd/systemd}
+            rootprefix=/${rootprefix#/}
+        fi
+
         nobody_user=`id -u -n 65534 2> /dev/null`
         if [ "$nobody_user" != "" ] ; then
                 # Validate that we can translate forth and back
@@ -76,7 +84,7 @@ if [ ! -f "$BUILDDIR"/build.ninja ] ; then
                 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"
+        meson "$BUILDDIR" -D "sysvinit-path=$sysvinit_path" -D "rootprefix=$rootprefix" -D default-hierarchy=unified -D man=false -D "nobody-user=$nobody_user" -D "nobody-group=$nobody_group"
 fi
 
 ninja -C "$BUILDDIR" all