another crontab example

[Brendan Strejcek]

Posted to the faq-o-matic also. Comments welcome.

Note how I am trying to simulate different namespaces by making actions
conditional upon a class which should only get set in the local
actionsequence. Is this what others do?

# begin cf.crontab_example

# tested on openbsd 3.4, should work in other environments

control:

    actionsequence = (
        shellcommands.cf_crontab_example_first  # check out crontab
        editfiles.cf_crontab_example            # edit crontab
        shellcommands.cf_crontab_example_second # check in crontab
    )

    editmark = ( "edited by cfagent (cf.crontab_example)" )

    crontab_tmp = ( ExecResult(/usr/bin/mktemp) )

editfiles:

    cf_crontab_example::

        # this file is checked out and checked in using shellcommands
        { ${crontab_tmp}
            # some edits...
            PrependIfNoSuchLine "# ${editmark}"
        }

shellcommands:

    cf_crontab_example_first::

        # chekout the crontab so it can be edited with editfiles
        "/usr/bin/crontab -l | sed 1,3d >${crontab_tmp}"

    cf_crontab_example_second::

        "/bin/cat ${crontab_tmp} | /usr/bin/crontab -"

        "/bin/rm -f ${crontab_tmp}"

# end cf.crontab_example