File: mkimg_plugin.py

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# Copyright 2017  Lars Wirzenius
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# =*= License: GPL-3+ =*=


import vmdb


class MkimgPlugin(vmdb.Plugin):
    def enable(self):
        self.app.step_runners.add(MkimgStepRunner())


class MkimgStepRunner(vmdb.StepRunnerInterface):
    def get_key_spec(self):
        return {"mkimg": str, "size": str}

    def run(self, values, settings, state):
        filename = values["mkimg"]
        size = values["size"]

        if not isinstance(filename, str):
            raise vmdb.NotString("mkimg", filename)
        if not filename:
            raise vmdb.IsEmptyString("mkimg", filename)

        if not isinstance(size, str):
            raise vmdb.NotString("mkimg: size", size)

        vmdb.runcmd(["qemu-img", "create", "-f", "raw", filename, size])