How to unpack a .tar file in Julia?

[Weijian Zhang]

Hello,

I have a .tar.gz file. With GZip.jl, I can write code to unzip it to a .tar file.

But how can I unpack this .tar file in Julia?

Thanks,

Weijian

[Stefan Karpinski]

I would just shell out to the tar command and then work with the untarred directory.

[Weijian Zhang]

All right, thanks.

[Aslak Grinsted]

I have a problem that i do not have tar on my windows machine, and for that reason Pkg.build("GR") fails. I tried fixing it using 7zip as that was present in my julia bin folder by replacing 

run(`tar xzf downloads/$tarball`)

with 

run(pipeline(`7z x -so downloads/$tarball`,`7z x -aoa -si -ttar -o"."`))

--- That worked fine on my windows machine, but fails on travis: https://travis-ci.org/jheinen/GR.jl/jobs/106192456

Any tips are welcome. 

[Tony Kelman]

Check the BinDeps package for unpack_cmd

[Josef Heinen]

Thanks for the info.

The problem is solved (in the meantime). See GR.jl commit 889f9d0