image_types_ostree: add /usr/local support

Add /usr/local support as outlined in OSTree documentation. This
makes sure that a writeable and persistent /usr/local directory
is available.

See also: https://ostree.readthedocs.io/en/latest/manual/adapting-existing/

Signed-off-by: Stefan Agner <stefan.agner@toradex.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/classes/image_types_ostree.bbclass b/classes/image_types_ostree.bbclass
index 39d04dc..2e8e8f5 100644
--- a/classes/image_types_ostree.bbclass
+++ b/classes/image_types_ostree.bbclass
@@ -104,6 +104,31 @@ IMAGE_CMD_ostree () {
         ln -sf var/roothome root
     fi
 
+    if [ -d usr/local ] && [ ! -L usr/local ]; then
+        if [ "$(ls -A usr/local)" ]; then
+            bbfatal "Data in /usr/local directory is not preserved by OSTree."
+        fi
+        rm -rf usr/local
+    fi
+
+    if [ -n "${SYSTEMD_USED}" ]; then
+        echo "d /var/usrlocal 0755 root root -" >>${tmpfiles_conf}
+    else
+        echo "mkdir -p /var/usrlocal; chown 755 /var/usrlocal" >>${tmpfiles_conf}
+    fi
+
+    dirs="bin etc games include lib man sbin share src"
+
+    for dir in ${dirs}; do
+        if [ -n "${SYSTEMD_USED}" ]; then
+            echo "d /var/usrlocal/${dir} 0755 root root -" >>${tmpfiles_conf}
+        else
+            echo "mkdir -p /var/usrlocal/${dir}; chown 755 /var/usrlocal/${dir}" >>${tmpfiles_conf}
+        fi
+    done
+
+    ln -sf ../var/usrlocal usr/local
+
     if [ "${KERNEL_IMAGETYPE}" = "fitImage" ]; then
         # this is a hack for ostree not to override init= in kernel cmdline -
         # make it think that the initramfs is present (while it is in FIT image)