osbuild: refactor stage information

For all currently supported modules, i.e. stages and assemblers,
convert the STAGE_DESC and STAGE_INFO into a proper doc-string.
Rename the STAGE_OPTS into SCHEMA.
Refactor meta.ModuleInfo loading accordingly.

The script to be used for the conversion is:

  --- 8< --- 8< --- 8< --- 8< --- 8< --- 8< --- 8< --- 8< ---

import os
import sys

import osbuild
import osbuild.meta

from osbuild.meta import ModuleInfo

def find_line(lines, start):
    for i, l in enumerate(lines):
        if l.startswith(start):
            return i
    return None

def del_block(lines, prefix):
    start = find_line(lines, prefix)
    end = find_line(lines[start:], '"""')
    print(start, end)
    del lines[start:start+end+1]

def main():
    index = osbuild.meta.Index(os.curdir)

    modules = []
    for klass in ("Stage", "Assembler"):
        mods = index.list_modules_for_class(klass)
        modules += [(klass, module) for module in mods]

    for m in modules:
        print(m)
        klass, name = m
        info = ModuleInfo.load(os.curdir, klass, name)

        module_path = ModuleInfo.module_class_to_directory(klass)
        path = os.path.join(os.curdir, module_path, name)
        with open(path, "r") as f:
            data = list(f.readlines())

            i = find_line(data, "STAGE_DESC")
            print(i)
            del data[i]

            del_block(data, "STAGE_INFO")

            i = find_line(data, "STAGE_OPTS")
            data[i] = 'SCHEMA = """\n'

        docstr = '"""\n' + info.desc + "\n" + info.info + '"""\n'
        doclst = docstr.split("\n")
        doclst = [l + "\n" for l in doclst]
        data = [data[0]] + doclst + data[1:]

        with open(path, "w") as f:
            f.writelines(data)

if __name__ == "__main__":
    main()
This commit is contained in:
Christian Kellner 2020-05-28 17:26:50 +02:00 committed by David Rheinsberg
parent 131d0264a8
commit 2a9cdde5ec
32 changed files with 340 additions and 269 deletions

View file

@ -1,14 +1,16 @@
#!/usr/bin/python3
"""
No-op assembler
No-op assembler. Produces no output, just prints a JSON dump of its options
and then exits.
"""
import json
import sys
STAGE_DESC = "No-op assembler"
STAGE_INFO = """
No-op assembler. Produces no output, just prints a JSON dump of its options
and then exits.
"""
STAGE_OPTS = """
SCHEMA = """
"additionalProperties": false
"""
def main(_tree, _output_dir, options):

View file

@ -1,18 +1,7 @@
#!/usr/bin/python3
"""
Assemble an OCI image archive
import datetime
import json
import os
import subprocess
import sys
import tempfile
DEFAULT_PATH = "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
STAGE_DESC = "Assemble an OCI image archive"
STAGE_INFO = """
Assemble an Open Container Initiative[1] image[2] archive, i.e. a
tarball whose contents is in the OCI image layout.
@ -30,7 +19,20 @@ podman[3] with `podman pull oci-archive:<archive>`.
[2] https://github.com/opencontainers/image-spec/
[3] https://podman.io/
"""
STAGE_OPTS = """
import datetime
import json
import os
import subprocess
import sys
import tempfile
DEFAULT_PATH = "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
SCHEMA = """
"additionalProperties": false,
"required": ["architecture", "filename"],
"properties": {

View file

@ -1,16 +1,7 @@
#!/usr/bin/python3
"""
Assemble a file system tree into a ostree commit
import json
import os
import subprocess
import sys
import tempfile
from osbuild.util import ostree
STAGE_DESC = "Assemble a file system tree into a ostree commit"
STAGE_INFO = """
Takes a file system tree that is already conforming to the ostree
system layout[1] and commits it to an archive repository.
@ -26,7 +17,18 @@ in the build root.
[1] https://ostree.readthedocs.io/en/stable/manual/adapting-existing/
"""
STAGE_OPTS = """
import json
import os
import subprocess
import sys
import tempfile
from osbuild.util import ostree
SCHEMA = """
"additionalProperties": false,
"required": ["ref"],
"properties": {

View file

@ -1,18 +1,7 @@
#!/usr/bin/python3
"""
Assemble a bootable partitioned disk image with qemu-img
import contextlib
import json
import os
import shutil
import struct
import subprocess
import sys
import tempfile
from typing import List, BinaryIO
import osbuild.remoteloop as remoteloop
STAGE_DESC = "Assemble a bootable partitioned disk image with qemu-img"
STAGE_INFO = """
Assemble a bootable partitioned disk image using `qemu-img`.
Creates a sparse partitioned disk image of type `pttype` of a given `size`,
@ -29,7 +18,20 @@ sparse image into the format requested with the `fmt` option.
Buildhost commands used: `truncate`, `mount`, `umount`, `sfdisk`,
`grub2-mkimage`, `mkfs.ext4` or `mkfs.xfs`, `qemu-img`.
"""
STAGE_OPTS = """
import contextlib
import json
import os
import shutil
import struct
import subprocess
import sys
import tempfile
from typing import List, BinaryIO
import osbuild.remoteloop as remoteloop
SCHEMA = """
"additionalProperties": false,
"required": ["format", "filename", "ptuuid", "size"],
"oneOf": [{

View file

@ -1,14 +1,7 @@
#!/usr/bin/python3
"""
Assemble tree into a raw filesystem image
import contextlib
import json
import os
import subprocess
import sys
import osbuild.remoteloop as remoteloop
STAGE_DESC = "Assemble tree into a raw filesystem image"
STAGE_INFO = """
Assemble the tree into a raw filesystem image named `filename`, with the UUID
`root_fs_uuid`.
@ -25,7 +18,16 @@ The filesystem UUID should be a standard (RFC4122) UUID, which you can
generate with uuid.uuid4() in Python, `uuidgen(1)` in a shell script, or
read from `/proc/sys/kernel/random/uuid` if your kernel provides it.
"""
STAGE_OPTS = """
import contextlib
import json
import os
import subprocess
import sys
import osbuild.remoteloop as remoteloop
SCHEMA = """
"additionalProperties": false,
"required": ["filename", "root_fs_uuid", "size"],
"properties": {

View file

@ -1,11 +1,7 @@
#!/usr/bin/python3
"""
Assemble a tar archive
import json
import subprocess
import sys
STAGE_DESC = "Assemble a tar archive"
STAGE_INFO = """
Assembles the tree into a tar archive named `filename`.
Uses the buildhost's `tar` command, like: `tar -cf $FILENAME -C $TREE`
@ -21,7 +17,13 @@ caller is responsible for making sure that `compression` and `filename` match.
Buildhost commands used: `tar` and any named `compression` program.
"""
STAGE_OPTS = """
import json
import subprocess
import sys
SCHEMA = """
"additionalProperties": false,
"required": ["filename"],
"properties": {

View file

@ -277,10 +277,9 @@ class ModuleInfo:
self.name = name
self.type = klass
opts = info.get("STAGE_OPTS") or ""
self.info = info.get("STAGE_INFO")
self.desc = info.get("STAGE_DESC")
self.opts = info.get("STAGE_OPTS")
opts = info.get("schema") or ""
self.info = info.get("info")
self.desc = info.get("desc")
self.opts = json.loads("{" + opts + "}")
@property
@ -312,7 +311,7 @@ class ModuleInfo:
@classmethod
def load(cls, root, klass, name) -> Optional["ModuleInfo"]:
names = ['STAGE_INFO', 'STAGE_DESC', 'STAGE_OPTS']
names = ['SCHEMA']
def value(a):
v = a.value
@ -338,9 +337,18 @@ class ModuleInfo:
return None
tree = ast.parse(data, name)
docstring = ast.get_docstring(tree)
doclist = docstring.split("\n")
assigns = filter_type(tree.body, ast.Assign)
targets = [(t, a) for a in assigns for t in targets(a)]
info = {k: value(v) for k, v in targets if k in names}
values = {k: value(v) for k, v in targets if k in names}
info = {
'schema': values.get("SCHEMA"),
'desc': doclist[0],
'info': "\n".join(doclist[1:])
}
return cls(klass, name, info)
@staticmethod

View file

@ -1,16 +1,18 @@
#!/usr/bin/python3
import json
import sys
import re
"""
Configure chrony to set system time from the network
STAGE_DESC = "Configure chrony to set system time from the network"
STAGE_INFO = """
Configures `chrony` to set the system time from the given `timeservers`.
Modifies /etc/chrony.conf, removing all "server" or "pool" lines and adding
a "server" line for each server listed in `timeservers`.
"""
STAGE_OPTS = """
import json
import sys
import re
SCHEMA = """
"additionalProperties": false,
"required": ["timeservers"],
"properties": {

View file

@ -1,16 +1,7 @@
#!/usr/bin/python3
"""
Copy files from a source to the tree
import json
import os
import sys
import subprocess
import tempfile
import osbuild.sources
STAGE_DESC = "Copy files from a source to the tree"
STAGE_INFO = """
Copies files obtained via a `source` to the tree. Multiple files or
directories can be copied by specifying multiple entries in `paths`.
If no paths are specified the whole contents of `source` is copied.
@ -25,7 +16,18 @@ Supported sources are currently:
are supported.
"""
STAGE_OPTS = """
import json
import os
import sys
import subprocess
import tempfile
import osbuild.sources
SCHEMA = """
"additionalProperties": false,
"definitions": {
"source-archive": {

View file

@ -1,17 +1,19 @@
#!/usr/bin/python3
"""
Set up an early root shell on a certain tty
import json
import os
import sys
STAGE_DESC = "Set up an early root shell on a certain tty"
STAGE_INFO = """
Creates a systemd unit file at /etc/systemd/system/osbuild-debug-shell.service
which starts an early-boot root shell on the given `tty`.
Also symlinks the service file into /etc/systemd/system/sysinit.target.wants/.
"""
STAGE_OPTS = """
import json
import os
import sys
SCHEMA = """
"additionalProperties": false,
"required": ["tty"],
"properties": {

View file

@ -1,14 +1,16 @@
#!/usr/bin/python3
"""
Return an error
Error stage. Return the given error. Useful for testing, debugging, and
wasting time.
"""
import json
import sys
STAGE_DESC = "Return an error"
STAGE_INFO = """
Error stage. Return the given error. Useful for testing, debugging, and
wasting time.
"""
STAGE_OPTS = """
SCHEMA = """
"additionalProperties": false,
"properties": {
"returncode": {

View file

@ -1,11 +1,7 @@
#!/usr/bin/python3
"""
Configure firewall
import json
import subprocess
import sys
STAGE_DESC = "Configure firewall"
STAGE_INFO = """
Configure firewalld using the `firewall-offline-cmd` from inside the target.
This stage adds each of the given `ports` and `enabled_services` to the default
@ -28,7 +24,13 @@ WARNING: this stage uses `chroot` to run `firewall-offline-cmd` inside the
target tree, which means it may fail unexpectedly when the buildhost and target
are different arches or OSes.
"""
STAGE_OPTS = """
import json
import subprocess
import sys
SCHEMA = """
"additionalProperties": false,
"properties": {
"ports": {

View file

@ -1,11 +1,7 @@
#!/usr/bin/python3
"""
Execute commands on first-boot
import json
import os
import sys
STAGE_DESC = "Execute commands on first-boot"
STAGE_INFO = """
Sequentially execute a list of commands on first-boot / instantiation.
This stage uses a logic similar to systemd's first-boot to execute a given
@ -18,7 +14,13 @@ before executing the given commands.
If the flag-file cannot be removed, the service fails without executing
any further first-boot commands.
"""
STAGE_OPTS = """
import json
import os
import sys
SCHEMA = """
"additionalProperties": false,
"required": ["commands"],
"properties": {

View file

@ -1,12 +1,7 @@
#!/usr/bin/python3
"""
Fix paths in /boot/loader/entries
import glob
import json
import re
import sys
STAGE_DESC = "Fix paths in /boot/loader/entries"
STAGE_INFO = """
Fixes paths in /boot/loader/entries that have incorrect paths for /boot.
This happens because some boot loader config tools (e.g. grub2-mkrelpath)
@ -21,7 +16,14 @@ By default it is `/boot`, i.e. assumes `/boot` is on the root file-system.
This stage reads and (re)writes all .conf files in /boot/loader/entries.
"""
STAGE_OPTS = """
import glob
import json
import re
import sys
SCHEMA = """
"additionalProperties": false,
"properties": {
"prefix": {

View file

@ -1,10 +1,7 @@
#!/usr/bin/python3
"""
Create /etc/fstab entries for filesystems
import json
import sys
STAGE_DESC = "Create /etc/fstab entries for filesystems"
STAGE_INFO = """
Create /etc/fstab entries for the given `filesystems`.
Each filesystem item must have at least `uuid` or `label` and
@ -12,7 +9,12 @@ a `path` (mount point).
This stage replaces /etc/fstab, removing any existing entries.
"""
STAGE_OPTS = """
import json
import sys
SCHEMA = """
"additionalProperties": false,
"required": ["filesystems"],
"properties": {

View file

@ -1,10 +1,7 @@
#!/usr/bin/python3
import json
import subprocess
import sys
"""
Create group accounts
STAGE_DESC = "Create group accounts"
STAGE_INFO = """
Create group accounts, optionally assigning them static GIDs.
Runs `groupadd` from the buildhost to create the groups listed in `groups`.
@ -12,7 +9,12 @@ If no `gid` is given, `groupadd` will choose one.
If the specified group name or GID is already in use, this stage will fail.
"""
STAGE_OPTS = """
import json
import subprocess
import sys
SCHEMA = """
"additionalProperties": false,
"properties": {
"groups": {

View file

@ -1,12 +1,7 @@
#!/usr/bin/python3
"""
Configure GRUB2 bootloader and set boot options
import json
import os
import shutil
import sys
STAGE_DESC = "Configure GRUB2 bootloader and set boot options"
STAGE_INFO = """
Configure the system to use GRUB2 as the bootloader, and set boot options.
Sets the GRUB2 boot/root filesystem to `rootfs`. If a separated boot
@ -41,7 +36,14 @@ and accompanying data can be installed from the built root via `uefi.install`.
Both UEFI and Legacy can be specified at the same time.
"""
STAGE_OPTS = """
import json
import os
import shutil
import sys
SCHEMA = """
"additionalProperties": false,
"oneOf": [{
"required": ["root_fs_uuid"]

View file

@ -1,19 +1,21 @@
#!/usr/bin/python3
"""
Set system hostname
import json
import os
import subprocess
import sys
STAGE_DESC = "Set system hostname"
STAGE_INFO = """
Sets system hostname.
Deletes /etc/hostname if present, then runs `systemd-firstboot` from the
buildhost with `--hostname={hostname}`, which checks the validity of the
hostname and writes it to /etc/hostname.
"""
STAGE_OPTS = """
import json
import os
import subprocess
import sys
SCHEMA = """
"additionalProperties": false,
"required": ["hostname"],
"properties": {

View file

@ -1,16 +1,18 @@
#!/usr/bin/python3
import json
import os
import sys
"""
Configure the kernel command-line parameters
STAGE_DESC = "Configure the kernel command-line parameters"
STAGE_INFO = """
Configures the kernel boot parameters, also known as the kernel
command line.
https://www.kernel.org/doc/html/latest/admin-guide/kernel-parameters.html
"""
STAGE_OPTS = """
import json
import os
import sys
SCHEMA = """
"additionalProperties": false,
"properties": {
"root_fs_uuid": {

View file

@ -1,12 +1,7 @@
#!/usr/bin/python3
"""
Set image's default keymap
import json
import subprocess
import sys
import os
STAGE_DESC = "Set image's default keymap"
STAGE_INFO = """
Sets the default console keyboard layout to `keymap`, like 'us' or 'de-latin1'.
Removes any existing /etc/vconsole.conf, then runs `systemd-firstboot` with the
@ -14,7 +9,14 @@ Removes any existing /etc/vconsole.conf, then runs `systemd-firstboot` with the
Valid keymaps are generally found in /lib/kbd/keymaps.
"""
STAGE_OPTS = """
import json
import subprocess
import sys
import os
SCHEMA = """
"additionalProperties": false,
"required": ["keymap"],
"properties": {

View file

@ -1,12 +1,7 @@
#!/usr/bin/python3
"""
Set system language.
import json
import subprocess
import sys
import os
STAGE_DESC = "Set system language."
STAGE_INFO = """
Sets the system language to the given `language`, which must be a valid locale
identifier, like "en_US.UTF-8".
@ -14,7 +9,14 @@ Removes `/etc/locale.conf` and then uses `systemd-firstboot` from the buildhost,
with the `--locale` flag, which will write a new `/etc/locale.conf` in the
target system with `LANG={language}`.
"""
STAGE_OPTS = """
import json
import subprocess
import sys
import os
SCHEMA = """
"additionalProperties": false,
"required": ["language"],
"properties": {

View file

@ -1,14 +1,16 @@
#!/usr/bin/python3
"""
Do Nothing
No-op stage. Prints a JSON dump of the options passed into this stage and
leaves the tree untouched. Useful for testing, debugging, and wasting time.
"""
import json
import sys
STAGE_DESC = "Do Nothing"
STAGE_INFO = """
No-op stage. Prints a JSON dump of the options passed into this stage and
leaves the tree untouched. Useful for testing, debugging, and wasting time.
"""
STAGE_OPTS = """
SCHEMA = """
"additionalProperties": false
"""

View file

@ -1,17 +1,7 @@
#!/usr/bin/python3
"""
Initialize the sysroot and pull and deploy an OStree commit
import contextlib
import json
import os
import sys
import subprocess
import osbuild.sources
from osbuild.util import selinux
STAGE_DESC = "Initialize the sysroot and pull and deploy an OStree commit"
STAGE_INFO = """
Initializes a clean ostree based system root, pulls the given `commit` and
creates a deployment from it using `osname` as the new stateroot (see [1]).
@ -29,7 +19,19 @@ the sysroot and the deployments. Additional kernel options can be passed via
[1] https://ostree.readthedocs.io/en/latest/manual/deployment/
"""
STAGE_OPTS = """
import contextlib
import json
import os
import sys
import subprocess
import osbuild.sources
from osbuild.util import selinux
SCHEMA = """
"required": ["commit", "osname", "rootfs"],
"properties": {
"commit": {

View file

@ -1,17 +1,7 @@
#!/usr/bin/python3
"""
Verify, and install RPM packages
import contextlib
import json
import os
import pathlib
import subprocess
import sys
import tempfile
import osbuild.sources
STAGE_DESC = "Verify, and install RPM packages"
STAGE_INFO = """
Verify, and install RPM packages.
`gpgkeys` should be an array of strings containing each GPG key to be used
@ -33,7 +23,19 @@ Uses the following binaries from the host:
* `sh`, `mkdir`, `mount`, `chmod` to prepare the target tree for `rpm`
* `rpm` to install packages into the target tree
"""
STAGE_OPTS = """
import contextlib
import json
import os
import pathlib
import subprocess
import sys
import tempfile
import osbuild.sources
SCHEMA = """
"additionalProperties": false,
"properties": {
"gpgkeys": {

View file

@ -1,15 +1,7 @@
#!/usr/bin/python3
"""
Transforms the tree to an ostree layout
import json
import os
import subprocess
import sys
from osbuild.util import ostree
STAGE_DESC = "Transforms the tree to an ostree layout"
STAGE_INFO = """
Uses `rpm-ostree compose` to transform a "normal" file system tree into
an OSTree conforming layout (see [1]). Among other things the main steps
are:
@ -37,7 +29,17 @@ human users need to be part of.
[1] https://ostree.readthedocs.io/en/latest/manual/adapting-existing/
[2] https://rpm-ostree.readthedocs.io/en/latest/manual/treefile/
"""
STAGE_OPTS = """
import json
import os
import subprocess
import sys
from osbuild.util import ostree
SCHEMA = """
"additionalProperties": false,
"properties": {
"etc_group_members": {

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@ -1,13 +1,7 @@
#!/usr/bin/python3
"""
Run an arbitrary script inside the target tree
import atexit
import json
import os
import subprocess
import sys
STAGE_DESC = "Run an arbitrary script inside the target tree"
STAGE_INFO = """
Runs an arbitrary script inside the target tree.
Writes the contents of the `script` item to `/osbuild-script`, sets the
@ -19,12 +13,21 @@ WARNING: running code inside the tree is unsafe, unreliable, and generally
discouraged. Using this stage may result in unexplained failures or other
undefined behavior, and should only be done as a last resort.
NOTE: if `script` does not start with a line like '#!/bin/bash\n', executing
NOTE: if `script` does not start with a line like '#!/bin/bash
', executing
it will fail with ENOEXEC. Some `chroot` binaries will try to run the script
through `/bin/sh` in that case, so it might still work, but that behavior is
not guaranteed.
"""
STAGE_OPTS = """
import atexit
import json
import os
import subprocess
import sys
SCHEMA = """
"additionalProperties": false,
"required": ["script"],
"properties": {

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@ -1,12 +1,7 @@
#!/usr/bin/python3
"""
Set SELinux file contexts
import json
import os
import subprocess
import sys
STAGE_DESC = "Set SELinux file contexts"
STAGE_INFO = """
Sets correct SELinux labels for every file in the tree, according to the
SELinux policy installed inside the tree.
@ -23,7 +18,14 @@ This stage should run after all other stages that create (or move) files, since
labels for newly-created files are determined by the host's SELinux policy and
may not match the tree's policy.
"""
STAGE_OPTS = """
import json
import os
import subprocess
import sys
SCHEMA = """
"additionalProperties": false,
"required": ["file_contexts"],
"properties": {

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@ -1,11 +1,7 @@
#!/usr/bin/python3
"""
Enable or disable systemd services
import json
import subprocess
import sys
STAGE_DESC = "Enable or disable systemd services"
STAGE_INFO = """
Enable or disable systemd units (service, socket, path, etc.)
This stage runs `systemctl enable` for all `enabled_services` items, which may
@ -15,7 +11,13 @@ items, which will delete _all_ symlinks to the named services.
Uses `systemctl` from the buildhost.
"""
STAGE_OPTS = """
import json
import subprocess
import sys
SCHEMA = """
"additionalProperties": false,
"required": ["enabled_services"],
"properties": {

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@ -1,18 +1,20 @@
#!/usr/bin/python3
"""
Enable osbuild Boot Test service
import json
import os
import sys
STAGE_DESC = "Enable osbuild Boot Test service"
STAGE_INFO = """
Creates a Boot Test service that executes the given `script` (sending output to
/dev/vport0p1) then immediately shuts down the system.
Creates `/etc/systemd/system/osbuild-test.service`, and a symlink to it in
`/etc/systemd/system/multi-user.target.wants/`.
"""
STAGE_OPTS = """
import json
import os
import sys
SCHEMA = """
"additionalProperties": false,
"required": ["script"],
"properties": {

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@ -1,19 +1,21 @@
#!/usr/bin/python3
"""
Set system timezone
import json
import subprocess
import sys
import os
STAGE_DESC = "Set system timezone"
STAGE_INFO = """
Set the system's timezone to `zone`, which should be a valid time zone
identifier from the tz database - like "America/New York" or "Europe/Berlin".
Removes `/etc/localtime`, then runs the host's `systemd-firstboot` binary with
the `--timezone` option, which will re-create `/etc/localtime`.
"""
STAGE_OPTS = """
import json
import subprocess
import sys
import os
SCHEMA = """
"additionalProperties": false,
"required": ["zone"],
"properties": {

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@ -1,12 +1,7 @@
#!/usr/bin/python3
"""
Add or modify user accounts
import json
import subprocess
import sys
import os
STAGE_DESC = "Add or modify user accounts"
STAGE_INFO = """
Add or modify user accounts inside the tree.
WARNING: This stage uses chroot() to run the `useradd` or `usermod` binary
@ -14,7 +9,14 @@ from inside the tree. This will fail for cross-arch builds and may fail or
misbehave if the `usermod`/`useradd` binary inside the tree makes incorrect
assumptions about its host system.
"""
STAGE_OPTS = """
import json
import subprocess
import sys
import os
SCHEMA = """
"additionalProperties": false,
"properties": {
"users": {

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@ -1,15 +1,17 @@
#!/usr/bin/python3
"""
Configure the z Initial Program Loader (zipl)
Configures `zipl` with a minimal config so it can be used in
the assembler to write the bootmap and bootloader code.
"""
import json
import os
import sys
STAGE_DESC = "Configure the z Initial Program Loader (zipl)"
STAGE_INFO = """
Configures `zipl` with a minimal config so it can be used in
the assembler to write the bootmap and bootloader code.
"""
STAGE_OPTS = """
SCHEMA = """
"additionalProperties": false,
"properties": {
"timeout": {