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Nikos Skalkotos authored
This used to be a class in the util module, but since this is only used on the Image, it suits better there.
257c6fbb
dialog_util.py 11.41 KiB
# -*- coding: utf-8 -*-
#
# Copyright (C) 2011-2014 GRNET S.A.
#
# 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/>.
"""Module providing useful functions for the dialog-based version of
snf-image-creator.
"""
import os
import stat
import re
import json
from image_creator.output.dialog import GaugeOutput
from image_creator.kamaki_wrapper import Kamaki
SMALL_WIDTH = 60
WIDTH = 70
def select_file(d, **kwargs):
"""Select a file or directory.
The following optional arguments can be applied:
* init: Initial file path. If this path is valid this will be returned
* ftype: Allowed file types. If the value of this argument is "br" only
block devices and regular files are valid. For a list of available
file types, see here:
http://libguestfs.org/guestfs.3.html#guestfs_readdir
* title: The dialog box title. The default one is: "Please select a file"
* bundle_host: This can be True or False. If this is True, an extra
"Bundle Host" button will be present if the file selection dialog.
"""
type_check = {'b': stat.S_ISBLK, # Block special
'c': stat.S_ISCHR, # Char special
'd': stat.S_ISDIR, # Directory
'f': stat.S_ISFIFO, # FIFO (named pipe)
'l': stat.S_ISLNK, # Symbolic link
'r': stat.S_ISREG, # Regular file
's': stat.S_ISSOCK} # Socket
fname = None if "init" not in kwargs else kwargs['init']
ftype = set(t for t in kwargs['ftype']) if 'ftype' in kwargs else set('r')
title = kwargs['title'] if 'title' in kwargs else 'Please select a file.'
bundle_host = kwargs['bundle_host'] if 'bundle_host' in kwargs else None
extra_button = 1 if bundle_host else 0
for t in ftype:
assert t in type_check, "Invalid ftype: %s" % t
# This is a special case
if bundle_host and fname == os.sep:
return os.sep
default = os.getcwd() + os.sep
while 1:
if fname is not None:
if not os.path.exists(fname):
d.msgbox("The file `%s' you choose does not exist." % fname,
width=SMALL_WIDTH)
else:
mode = os.stat(fname).st_mode
for i in ftype:
if type_check[i](mode):
return fname
if stat.S_ISDIR(mode):
default = fname
else:
d.msgbox("Invalid input.", width=SMALL_WIDTH)
(code, fname) = d.fselect(default, 10, 60, extra_button=extra_button,
title=title, extra_label="Bundle Host")
if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
return None
elif code == d.DIALOG_EXTRA:
return os.sep
return fname
def update_background_title(session):
"""Update the background title of the dialog page"""
d = session['dialog']
disk = session['disk']
image = session['image']
MB = 2 ** 20
size = (image.size + MB - 1) // MB
postfix = " (shrinked)" if image.os.shrinked else ''
title = "OS: %s, Distro: %s, Size: %dMB%s, Source: %s" % \
(image.ostype.capitalize(), image.distro.capitalize(), size,
postfix, os.path.abspath(disk.source))
d.setBackgroundTitle(title)
def confirm_exit(d, msg=''):
"""Ask the user to confirm when exiting the program"""
return not d.yesno("%s Do you want to exit?" % msg, width=SMALL_WIDTH)
def confirm_reset(d):
"""Ask the user to confirm a reset action"""
return not d.yesno("Are you sure you want to reset everything?",
width=SMALL_WIDTH, defaultno=1)
class Reset(Exception):
"""Exception used to reset the program"""
pass
def extract_metadata_string(session):
"""Convert image metadata to text"""
metadata = {}
metadata.update(session['metadata'])
if 'task_metadata' in session:
for key in session['task_metadata']:
metadata[key] = 'yes'
return unicode(json.dumps({'properties': metadata,
'disk-format': 'diskdump'}, ensure_ascii=False))
def extract_image(session):
"""Dump the image to a local file"""
d = session['dialog']
dir = os.getcwd()
while 1:
if dir and dir[-1] != os.sep:
dir = dir + os.sep
(code, path) = d.fselect(dir, 10, 50, title="Save image as...")
if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
return False
if os.path.isdir(path):
dir = path
continue
if os.path.isdir("%s.meta" % path):
d.msgbox("Can't overwrite directory `%s.meta'" % path,
width=SMALL_WIDTH)
continue
if os.path.isdir("%s.md5sum" % path):
d.msgbox("Can't overwrite directory `%s.md5sum'" % path,
width=SMALL_WIDTH)
continue
basedir = os.path.dirname(path)
name = os.path.basename(path)
if not os.path.exists(basedir):
d.msgbox("Directory `%s' does not exist" % basedir,
width=SMALL_WIDTH)
continue
dir = basedir
if len(name) == 0:
continue
files = ["%s%s" % (path, ext) for ext in ('', '.meta', '.md5sum')]
overwrite = filter(os.path.exists, files)
if len(overwrite) > 0:
if d.yesno("The following file(s) exist:\n"
"%s\nDo you want to overwrite them?" %
"\n".join(overwrite), width=SMALL_WIDTH):
continue
gauge = GaugeOutput(d, "Image Extraction", "Extracting image...")
try:
image = session['image']
out = image.out
out.add(gauge)
try:
if "checksum" not in session:
session['checksum'] = image.md5()
# Extract image file
image.dump(path)
# Extract metadata file
out.output("Extracting metadata file ...")
with open('%s.meta' % path, 'w') as f:
f.write(extract_metadata_string(session))
out.success('done')
# Extract md5sum file
out.output("Extracting md5sum file ...")
md5str = "%s %s\n" % (session['checksum'], name)
with open('%s.md5sum' % path, 'w') as f:
f.write(md5str)
out.success("done")
finally:
out.remove(gauge)
finally:
gauge.cleanup()
d.msgbox("Image file `%s' was successfully extracted!" % path,
width=SMALL_WIDTH)
break
return True
def _check_cloud(session, name, url, token):
"""Checks if the provided info for a cloud are valid"""
d = session['dialog']
regexp = re.compile(r'^[~@#$:\-\w]+$')
if not re.match(regexp, name):
d.msgbox("Allowed characters for name: a-zA-Z0-9_~@#$:-", width=WIDTH)
return False
if len(url) == 0:
d.msgbox("URL cannot be empty!", width=WIDTH)
return False
if len(token) == 0:
d.msgbox("Token cannot be empty!", width=WIDTH)
return False
if Kamaki.create_account(url, token) is None:
d.msgbox("The cloud info you provided is not valid. Please check the "
"Authentication URL and the token values again!", width=WIDTH)
return False
return True
def add_cloud(session):
"""Add a new cloud account"""
d = session['dialog']
name = ""
description = ""
url = ""
token = ""
while 1:
fields = [
("Name:", name, 60),
("Description (optional): ", description, 80),
("Authentication URL: ", url, 200),
("Token:", token, 100)]
(code, output) = d.form("Add a new cloud account:", height=13,
width=WIDTH, form_height=4, fields=fields)
if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
return False
name, description, url, token = output
name = name.strip()
description = description.strip()
url = url.strip()
token = token.strip()
if _check_cloud(session, name, url, token):
if name in Kamaki.get_clouds().keys():
d.msgbox("A cloud with name `%s' already exists. If you want "
"to edit the existing cloud account, use the edit "
"menu." % name, width=WIDTH)
else:
Kamaki.save_cloud(name, url, token, description)
break
continue
return True
def edit_cloud(session, name):
"""Edit a cloud account"""
info = Kamaki.get_cloud_by_name(name)
assert info, "Cloud: `%s' does not exist" % name
description = info['description'] if 'description' in info else ""
url = info['url'] if 'url' in info else ""
token = info['token'] if 'token' in info else ""
d = session['dialog']
while 1:
fields = [
("Description (optional): ", description, 80),
("Authentication URL: ", url, 200),
("Token:", token, 100)]
(code, output) = d.form("Edit cloud account: `%s'" % name, height=13,
width=WIDTH, form_height=3, fields=fields)
if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
return False
description, url, token = output
description = description.strip()
url = url.strip()
token = token.strip()
if _check_cloud(session, name, url, token):
Kamaki.save_cloud(name, url, token, description)
break
continue
return True
def update_sysprep_param(session, name, title=None):
"""Modify the value of a sysprep parameter"""
d = session['dialog']
image = session['image']
param = image.os.sysprep_params[name]
while 1:
if param.type in ("file", "dir"):
if not title:
title = "Please select a %s to use for the `%s' parameter" % \
('file' if param.type == 'file' else 'directory', name)
ftype = "br" if param.type == 'file' else 'd'
value = select_file(d, ftype=ftype, title=title)
if value is None:
return False
else:
if not title:
title = "Please provide a new value for configuration " \
"parameter: `%s'" % name
(code, answer) = d.inputbox(
title, width=WIDTH, init=str(param.value))
if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
return False
value = answer.strip()
if param.set_value(value) is False:
d.msgbox("Error: %s" % param.error, width=WIDTH)
param.error = None
continue
break
return True
# vim: set sta sts=4 shiftwidth=4 sw=4 et ai :