In expand last partition script btrfs support added

    Improvement, expand-on-first-boot: support for btrfs added

    v2: the mount point for btrfs filesystem to resize is under /dev/shm
    by default but a variable defined in the running environment can
    change the temporary directory path. The /dev/shm has been chosen
    because in some systems /tmp can be on a RO root filesystem and
    /tmp not yet mounted with tmpfs. This requires the system to have
    /dev/shm configured into the kernel.

    v3: the previous version was using a bashism but the shebang is /bin/sh
    this means that the script will fail in a customized system in which /bin/sh
    do not link to bash or bash is not available.

    v4: Felix suggested using mktemp for the temporary directory in which to
    mount the btrfs filesystem to resize. The default path /tmp could be changed
    using the variable TMPDIR to set in the running environment.

    v5: typo fixes into the patch description

    v6: mktemp does a reasonable second try with -p /dev/shm before failing

Sent by elastic mail SMTP and gone in moderation, also here in attachment.

Best, R-