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Re: downloading a tarball

From: Catonano
Subject: Re: downloading a tarball
Date: Fri, 24 Mar 2017 14:16:46 +0100

2017-03-24 13:50 GMT+01:00 Ricardo Wurmus <address@hidden>:

Catonano <address@hidden> writes:

> This
> I attempted to build the package several times but every time the hash
> results to be wrong.
> I correct it and then it's wrong again
> For example, I get
> @ build-failed
> /gnu/store/dcaqrf007jxyi0jzlsakr3j7faxm122f-libxsl-1.4.0.tar.gz.drv - 1
> output path
> `/gnu/store/v6i85v3myb09nbsacq9ghx6yd0spcr67-libxsl-1.4.0.tar.gz' should
> have sha256 hash `1574bcyagix5fkbs0yi2npi59y1zck23y2aia52vdv6ra3i5raid',
> instead has `1zmsb0w6qh4vx7n7r3yijc5p4fwljyk5apzi1hwmrr5rkawmqmks'
> so I change it to
> 1zmsb0w6qh4vx7n7r3yijc5p4fwljyk5apzi1hwmrr5rkawmqmks
> and then I get
> @ build-failed
> /gnu/store/vsl7yz0nyklv0705jb5py015jkz3r6dg-libxsl-1.4.0.tar.gz.drv - 1
> output path
> `/gnu/store/wjyja461cr7kvvryp6v21q3iagf5rd8m-libxsl-1.4.0.tar.gz' should
> have sha256 hash `1zmsb0w6qh4vx7n7r3yijc5p4fwljyk5apzi1hwmrr5rkawmqmks',
> instead has `0fyd8h4i46qw3xii3pfa12k9k9ndmj59b552pmkpwcq7psyrbf32'
> So now it's not 1zmsb0w6qh4vx7n7r3yijc5p4fwljyk5apzi1hwmrr5rkawmqmks
> anymore. It's
> 0fyd8h4i46qw3xii3pfa12k9k9ndmj59b552pmkpwcq7psyrbf32
> I'm doing this with a master checkout.
> What am I missing ?

Have you confirmed that the file you get is actually a tarball?
Sometimes you might get an HTML page and Guix reports the hash for that.

You nailed it

I catted


which is the downloaded tarball and it contains html !

How can this be ? I'm using

(uri (string-append "mirror://sourceforge/libxsl/libxsl-"
                    version ".zip"))

The url used by icecat is

and the result is a sound tarball

How does it happen that the mirror based url leads to an html page ?

In general it is better to download the tarball manually and then use
“guix hash” on the result after confirming that the tarball is in fact
okay (e.g. by validating signatures or inspecting it).

I did ! This was my first step, I inspected it ! And I hashed it

But then this whirl of hashes began


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