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Want to tar/gzip a few files into a specific directory structure?

Posted on 2011-09-16
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Last Modified: 2012-05-12
Hello,

I have several images that I want to tar or gzip into specific directories.  For instance:
image1.png => my_images/image1.png
image2.png => thumbnail/image2.png

So basically I want to specify when creating the archive, "put these files in this directory in the archive and these files in another directory".

That is the first part of the question.  The second part is while uncompressing I want to also specify a different destination for all the files depending on the directory they are in.  If the second part is not possible I can uncompress them all and then just run copy commands for each specific file.

I'm doing this in PHP but I probably will end up calling a shell script to all of it.  Thanks for any help or advice!!
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Question by:parlays
6 Comments
 
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by:
arnold earned 250 total points
ID: 36550887
The file has to be in the directory.

presumably you are appending data to an existing tar archive?
tar --append --file=oldarchive.tar my_images/image1.png
http://www.gnu.org/software/automake/manual/tar/appending-files.html
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Expert Comment

by:arnold
ID: 36550943
Oh, it would be a two step process sine the append can only be done to the raw archive versus compressed one.

Not sure whether you can append a compresed tar archive entry into a Gziped file.
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Assisted Solution

by:Gerwin Jansen
Gerwin Jansen earned 125 total points
ID: 36554031
Easiest way to do this is copy or move the files to the required directories first and then tar/gz the directories. Do you know which files need to go into which directory? Is there a pattern?

So you could do, assuming that the current directory is where the images are:

mkdir my_images thumbnails
mv <filepattern1> my_images/
mv <filepattern2> thumbnail/
tar cf images.tar my_images thumbnail
gzip images.tar

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Note that <filepattern1> and <filepattern2> are somthing like image*.png and thumb*.png, depending on your filenames.

When uncompressing you can do it in a similar way by creating a tmp directory (t.t) first:

mkdir t.t
gunzip images.tar.gz
mv images.tar t.t/
cd t.t
tar xf images.tar
mv my_images/* <destination dir for images>/
mv  thumbnail/* <destination dir for thumbnails>/

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Assisted Solution

by:xterm
xterm earned 125 total points
ID: 36581264
FYI, modern gnu tar has g(un)zip capabilities built-in, so you can save a few steps:

tar czf images.tar.gz my_images thumbnail

and

tar xzf images.tar.gz

(and omit the gzip/gunzip stuff)
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Assisted Solution

by:arnold
arnold earned 250 total points
ID: 36581691
While the gunzip/gzip option exist, it does not work with adding files into an existing archive.

i.e. the user has an existing archive into which directory/file needs to be added/appended.

tar -cf tarfile.tar somedirectory
tar -rf tarfile.tar somenewdirectory
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Author Closing Comment

by:parlays
ID: 36582099
thanks everyone!!
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