CODEWITHSUNDEEP
linuxjargzipextracttar
Dhiraj
Dhiraj

Reputation: 497

How do I extract only the desired files from tar.gz?

I have a .tar.gz file which has multiple folders underneath. Each folder has multiple files and I only want to extract the SNAPSHOT.jar from all the folders it has underneath.

I tried using wildcards but its not helping. Ex:

    tar -xf samplejars.tar.gz --wildcards "*SNAPSHOT*.jar"

samplejars.tar.gz has many folders and I only want to extract SNAPSHOT.jar. How do I do that?

Note: All the jars have unique/different names.

Upvotes: 4

Views: 4003

Answers (3)

Dan Meigs
Dan Meigs

Reputation: 383

You can create a file with the pattern you are looking for: 

echo "*SNAPSHOT*.jar" > target

If you have multiple patterns, you can add multiple lines to your target file

echo "*.md" >> target

Then you can use the --files-from switch:

tar -xf samplejars.tar.gz --files-from=filename

I tested with 

data/
data/a/
data/a/ANOTHER_SNAPSHOT.jar
data/b/
data/c/
data/c/SNAPSHOT.jar
data/d/
data/e/
data/f/
data/f/SNAPSHOT.jar.with.extension
data/g/
data/g/SNAPSHOT-2.jar
data/g/SNAPSHOT.jar
data/h/

Result

data/a/ANOTHER_SNAPSHOT.jar
data/c/SNAPSHOT.jar
data/g/SNAPSHOT-2.jar
data/g/SNAPSHOT.jar

If all the files have unique filenames, as the OP said, you can use --strip-components to remove the file structure

tar -xf samplejars.tar.gz --files-from=filename --strip-components 2

With my data, the result was: 

ANOTHER_SNAPSHOT.jar
SNAPSHOT.jar
SNAPSHOT-2.jar

Because I did not have unique names, one of the SNAPSHOT.jar files was overwritten in the --strip-components step.

Upvotes: 1

blue112
blue112

Reputation: 56432

You can use xargs for that :

tar -tf data.tar.gz | grep SNAPSHOT.jar | xargs tar -xf data.tar.gz

Then, to move all the files to the root directory

find archive_root_dir -type f -exec mv -i {} . \;

Upvotes: 1

Florian Schlag
Florian Schlag

Reputation: 659

I tested it with the following folder structure:

data/
data/a
data/a/ANOTHER_SNAPSHOT.jar
data/b
data/c
data/c/SNAPSHOT.jar
data/d
data/e
data/f
data/f/SNAPSHOT.jar.with.extension
data/g
data/g/SNAPSHOT.jar
data/h

The following wildcard mask works and extract only the files matching exactly SNAPSHOT.jar not SNAPSHOT.jar.with.extension and ANOTHER_SNAPSHOT.jar

tar -xf data.tar.gz --wildcards "*/SNAPSHOT.jar"

Result:

data/c/SNAPSHOT.jar
data/g/SNAPSHOT.jar

Upvotes: 3

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