Wishlist: Uncompress images before import to disk

[GoogleCodeExporter]

Disck images are very large, and normally are compressed using some format 
(rar, zip, bz2). Uncompress all at one time is needed for importing several 
images to disk, needing very much disk space.

It would be great if qwbfs do the following algorithm:
- make temporal folder
For each compressed image
- Look the file and determine compressed format
- uncompress to temporal folder
- Import to disk
- remove uncompressed image

This will be very usefull having a large list of images.

If you tell me where that code should be inserted, I could help implementing it.

Thanks.

Original issue reported on code.google.com by krypto...@gmail.com on 20 Nov 2011 at 1:48

[GoogleCodeExporter]

Hi,

This will be a great feature, but i doubt to find a portable library for 
handling such formats ? Maybe 7Zip ?

I'm not yet sure about the place to put the code.
The easier way would be to implement a feature i planned for the next version: 
abstract file systems so getting informations, reading from, writing to 
partitions / files can would be virtual and can allow some hook inside their 
custom implementations.

You can try to contact me directly on irc 
(irc://irc.freenode.net/monkeystudio), or using my gmail/jabber account, so we 
may extend this discution.

Original comment by pasnox on 22 Nov 2011 at 6:27

• Changed state: Accepted
• Added labels: Type-Enhancement
• Removed labels: Type-Defect

[GoogleCodeExporter]

I was looking for portable libraries, but I had no success.
7zip is not a library. Indeed, it only has libraries for 7z and lzma formats, 
for other formats it embeds code from other projects. Take code from all other 
projects is technically complex and legally risky, there are several licenses.
The most simple solution may be 7zip be a requisite, and call directly "p7zip 
-d" from application.
Other option is to configure the uncompress tool fior every format supported in 
application settings, but this option is worst for users.

I notice other great feature: terminal interface.
It would be great can execute something like:
qwbfsmanager -import -d /dev/sde1 image.iso
qwbfsmanager -remove -d /dev/sde1 RDXP99

With these features, qwbfsmanager can be integrated in scripts, and much work 
can be automatized, even compress and uncompress.

Thanks.

Original comment by krypto...@gmail.com on 27 Nov 2011 at 2:57

[GoogleCodeExporter]

Effectively, we can request user to configure a file to 7zip binary, and use it 
by running a process, this is most likely the best thing to do.

Regarding your others features, it's good idea !

If u can comes with code, i will take it !
There is a pGetOpt class in the fresh library used by QWBFS Manager, u could 
use it to parse command line option.

Br,

Original comment by pasnox on 29 Nov 2011 at 8:11

[GoogleCodeExporter]

Excuse me, I have try to write a patch, but I lost between qwbfs and libwbfs.
Using pGetOpt of fresh library, my patch would be something like this:

pGetOpt opt;
const QString imageName = new QString("image"); 
const QString deviceName = new QString("device");
QString* deviceNameptr;
QString* imageNameptr;
bool isNoGUI;
opt.addOption("i",imageName, imageNameptr);// -iImage.iso OR --image=Image.iso
opt.addOption("d",deviceName, deviceNameptr);// -d/dev/sda1 OR 
--device=/dev/sda1
opt.addSwitch("nogui", isNoGUI);// --nogui

if((imageNameptr!=null) && (deviceNameptr!=null)){

//Stimated image size?
//There is enough space?

QWBFS::Model::Disc source = new QWBFS::Model::Disc(imageNameptr)

WorkerThread::isoToWBFS( WorkerThread::Task task, &source, deviceNameptr, bool 
trimWBFS, const QString& invalidChars )

}

if(isNoGUI) return;

-----------------------------------------------
But I dont know how to use the dozens of functions with similar names inside 
qwbfs.

Regrets.

Original comment by krypto...@gmail.com on 2 Dec 2011 at 9:56

[GoogleCodeExporter]

Thanks for the snippet, i will try to check that when i got time.
No problem for the uncompress disk, i will try to look that too ;)

Original comment by pasnox on 16 Dec 2011 at 8:40