#10 Add DMG extraction support

[Christofer Dutz]

It seems that 7Zip is able to extract DMG files (At least in version 9.20). It would be awesome, if the java binding would enable me to extract DMG images.

I would be glad to help, if you tell me how.

[Boris Brodski]

Hello Christofer,

thank you for offering your help :)
sure, all archive formats supported by 7-zip should be added one by one.

If you really willing to help, here is how you can do it:

In order to add a new archive format I need some test archives. For each major compression option
I need following archives:

1. Single file archives
   https://github.com/borisbrodski/sevenzipjbinding/tree/master/test/JavaTests/testdata/simple
   5 archives containing a single file: simple1.dat, simple2.dat, ..., simple5.dat

2. Multiple files archives
   https://github.com/borisbrodski/sevenzipjbinding/tree/master/test/JavaTests/testdata/multiple-files
   3 archives containing the content of the archive1.zip, archive2.zip and archive3.zip files.

For simple example take a look of the ARJ archives:

• https://github.com/borisbrodski/sevenzipjbinding/tree/master/test/JavaTests/testdata/multiple-files/arj
• https://github.com/borisbrodski/sevenzipjbinding/tree/master/test/JavaTests/testdata/simple/arj
  Here the major compression options are:
• Compression level (0, 2 and 4)
• With or without password

For DMG I think the options could be:

• sparse image / non-sparse image.
• single volume / multi-volume (Is it possible without creating huge images?)
• With / without compression

[Christofer Dutz]

Hi Boris,

Ok ... I am quite new to the DMG format, but I'll try to whip up some
test-files tomorrow. Hopefuly this will be easy ;-)

Chris

Am .10.2015, 20:09 Uhr, schrieb Boris Brodski boris_brodski@users.sf.net:

Hello Christofer,

thank you for offering your help :)
sure, all archive formats supported by 7-zip should be added one by one.

If you really willing to help, here is how you can do it:

In order to add a new archive format I need some test archives. For each
major compression option
I need following archives:

Single file archives
https://github.com/borisbrodski/sevenzipjbinding/tree/master/test/JavaTests/testdata/simple
5 archives containing a single file: simple1.dat, simple2.dat, ...,
simple5.dat

Multiple files archives
https://github.com/borisbrodski/sevenzipjbinding/tree/master/test/JavaTests/testdata/multiple-files
3 archives containing the content of the archive1.zip, archive2.zip and
archive3.zip files.

For simple example take a look of the ARJ archives:
https://github.com/borisbrodski/sevenzipjbinding/tree/master/test/JavaTests/testdata/multiple-files/arj
https://github.com/borisbrodski/sevenzipjbinding/tree/master/test/JavaTests/testdata/simple/arj
Here the major compression options are:
Compression level (0, 2 and 4)
With or without password

For DMG I think the options could be:
sparse image / non-sparse image.
single volume / multi-volume (Is it possible without creating huge
images?)
* With / without compression

[feature-requests:#10] Add DMG extraction support

Status: open
Group: Next Release (example)
Created: Mon Oct 12, 2015 02:14 PM UTC by Christofer Dutz
Last Updated: Mon Oct 12, 2015 02:14 PM UTC
Owner: nobody

It seems that 7Zip is able to extract DMG files (At least in version
9.20). It would be awesome, if the java binding would enable me to
extract DMG images.

I would be glad to help, if you tell me how.

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