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# Copyright 2019 Antonio Terceiro
#
# 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 os
import vmdb
class FstabPlugin(vmdb.Plugin):
def enable(self):
self.app.step_runners.add(FstabStepRunner())
class FstabStepRunner(vmdb.StepRunnerInterface):
def get_key_spec(self):
return {"fstab": str}
def run(self, values, setting, state):
tag = values["fstab"]
chroot = state.tags.get_builder_mount_point(tag)
filesystems = []
for tag in state.tags.get_tags():
device = state.tags.get_dev(tag)
mount_point = state.tags.get_target_mount_point(tag)
if mount_point is not None:
fstype = state.tags.get_fstype(tag)
output = vmdb.runcmd(
["blkid", "-c", "/dev/null", "-o", "value", "-s", "UUID", device]
)
if output:
uuid = output.decode().strip()
filesystems.append(
{"uuid": uuid, "mount_point": mount_point, "fstype": fstype}
)
else:
raise Exception(
"Unknown UUID for device {} (to be mounted on {})".format(
device, mount_point
)
)
fstab_path = os.path.join(chroot, "etc/fstab")
line = "UUID={uuid} {mount_point} {fstype} errors=remount-ro 0 1\n"
with open(fstab_path, "w") as fstab:
for entry in filesystems:
fstab.write(line.format(**entry))
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