1 # -*- coding: utf-8 -*-
3 # Copyright 2012 GRNET S.A. All rights reserved.
5 # Redistribution and use in source and binary forms, with or
6 # without modification, are permitted provided that the following
9 # 1. Redistributions of source code must retain the above
10 # copyright notice, this list of conditions and the following
13 # 2. Redistributions in binary form must reproduce the above
14 # copyright notice, this list of conditions and the following
15 # disclaimer in the documentation and/or other materials
16 # provided with the distribution.
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19 # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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24 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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34 # or implied, of GRNET S.A.
36 """Module providing useful functions for the dialog-based version of
41 from image_creator.output.dialog import GaugeOutput
42 from image_creator.util import MD5
48 def update_background_title(session):
49 """Update the backgroud title of the dialog page"""
51 disk = session['disk']
52 image = session['image']
56 size = (image.size + MB - 1) // MB
57 shrinked = 'shrinked' in session and session['shrinked']
58 postfix = " (shrinked)" if shrinked else ''
60 title = "OS: %s, Distro: %s, Size: %dMB%s, Source: %s" % \
61 (image.ostype, image.distro, size, postfix,
62 os.path.abspath(disk.source))
64 d.setBackgroundTitle(title)
67 def confirm_exit(d, msg=''):
68 """Ask the user to confirm when exiting the program"""
69 return not d.yesno("%s Do you want to exit?" % msg, width=SMALL_WIDTH)
73 """Ask the user to confirm a reset action"""
74 return not d.yesno("Are you sure you want to reset everything?",
75 width=SMALL_WIDTH, defaultno=1)
78 class Reset(Exception):
79 """Exception used to reset the program"""
83 def extract_metadata_string(session):
84 """Convert image metadata to text"""
85 metadata = ['%s=%s' % (k, v) for (k, v) in session['metadata'].items()]
87 if 'task_metadata' in session:
88 metadata.extend("%s=yes" % m for m in session['task_metadata'])
90 return '\n'.join(metadata) + '\n'
93 def extract_image(session):
94 """Dump the image to a local file"""
98 if dir and dir[-1] != os.sep:
101 (code, path) = d.fselect(dir, 10, 50, title="Save image as...")
102 if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
105 if os.path.isdir(path):
109 if os.path.isdir("%s.meta" % path):
110 d.msgbox("Can't overwrite directory `%s.meta'" % path,
114 if os.path.isdir("%s.md5sum" % path):
115 d.msgbox("Can't overwrite directory `%s.md5sum'" % path,
119 basedir = os.path.dirname(path)
120 name = os.path.basename(path)
121 if not os.path.exists(basedir):
122 d.msgbox("Directory `%s' does not exist" % basedir,
130 files = ["%s%s" % (path, ext) for ext in ('', '.meta', '.md5sum')]
131 overwrite = filter(os.path.exists, files)
133 if len(overwrite) > 0:
134 if d.yesno("The following file(s) exist:\n"
135 "%s\nDo you want to overwrite them?" %
136 "\n".join(overwrite), width=SMALL_WIDTH):
139 gauge = GaugeOutput(d, "Image Extraction", "Extracting image...")
141 image = session['image']
145 if "checksum" not in session:
147 session['checksum'] = md5.compute(image.device, image.size)
152 # Extract metadata file
153 out.output("Extracting metadata file ...")
154 with open('%s.meta' % path, 'w') as f:
155 f.write(extract_metadata_string(session))
158 # Extract md5sum file
159 out.output("Extracting md5sum file ...")
160 md5str = "%s %s\n" % (session['checksum'], name)
161 with open('%s.md5sum' % path, 'w') as f:
168 d.msgbox("Image file `%s' was successfully extracted!" % path,
174 # vim: set sta sts=4 shiftwidth=4 sw=4 et ai :