bug#26811: guix does not resume download on FTP timeouts

[Sergei Trofimovich]

I have slow internet :)

It looks like ftp://tug.org has a FTP session timeout of 2 hours 11 minutes, or 
something like that.
Over night I tried to build sbcl and failed. Note how download silently stopped 
at ~80% [1].

Would be nice if guix had a mechanism to reconnect to FTP and continue download 
after timeout.

Thanks!

[1]: $ while :; do ./pre-inst-env guix build sbcl --no-substitutes; done

@ build-started 
/gnu/store/ywpxpl2gp6z3sjvm7sn8gs6n4mhm2f0g-texlive-20160523b-texmf.tar.xz.drv 
- x86_64-linux 
/var/log/guix/drvs/yw//pxpl2gp6z3sjvm7sn8gs6n4mhm2f0g-texlive-20160523b-texmf.tar.xz.drv.bz2

Starting download of 
/gnu/store/xdjl5wxdjghq85nbc9qacgyzh8d54f6y-texlive-20160523b-texmf.tar.xz
From 
ftp://tug.org/historic/systems/texlive/2016/texlive-20160523b-texmf.tar.xz...
 …3b-texmf.tar.xz  1.93GiB       213KiB/s 02:11:32 [################    ]  83.0%
output path 
`/gnu/store/xdjl5wxdjghq85nbc9qacgyzh8d54f6y-texlive-20160523b-texmf.tar.xz' 
should have sha256 hash `1dv8vgfzpczqw82hv9g7a8djhhyzywljmrarlcyy6g2qi5q51glr', 
instead has `062qbbhlin1ys9lihax34kq503ig1fl55br84j94vwawbk04p6j0'
@ build-failed 
/gnu/store/ywpxpl2gp6z3sjvm7sn8gs6n4mhm2f0g-texlive-20160523b-texmf.tar.xz.drv 
- 1 output path 
`/gnu/store/xdjl5wxdjghq85nbc9qacgyzh8d54f6y-texlive-20160523b-texmf.tar.xz' 
should have sha256 hash `1dv8vgfzpczqw82hv9g7a8djhhyzywljmrarlcyy6g2qi5q51glr', 
instead has `062qbbhlin1ys9lihax34kq503ig1fl55br84j94vwawbk04p6j0'
@ build-started /gnu/store/in6vixj9fb9c8f9z3jf42zz9v40dbjxi-serf-1.3.8.drv - 
x86_64-linux 
/var/log/guix/drvs/in//6vixj9fb9c8f9z3jf42zz9v40dbjxi-serf-1.3.8.drv.bz2
cannot build derivation 
`/gnu/store/q9s2wdsaqvrllkcsf8w1a8424zd9ybc1-texlive-20160523b-texmf.tar.xz.drv':
 1 dependencies couldn't be built
cannot build derivation 
`/gnu/store/b7abk0aarqv0ylxp2g4s2sf9j75xdy04-texlive-texmf-2016.drv': 1 
dependencies couldn't be built
cannot build derivation 
`/gnu/store/kpjy0c1pl8vzxbkys6p45ij3za6a92gj-texlive-2016.drv': 1 dependencies 
couldn't be built
cannot build derivation 
`/gnu/store/clnamqpbkkn2k0ji1clbnznx2fyyig2c-sbcl-1.3.7.drv': 1 dependencies 
couldn't be built
guix build: error: build failed: build of 
`/gnu/store/clnamqpbkkn2k0ji1clbnznx2fyyig2c-sbcl-1.3.7.drv' failed
@ build-started 
/gnu/store/ywpxpl2gp6z3sjvm7sn8gs6n4mhm2f0g-texlive-20160523b-texmf.tar.xz.drv 
- x86_64-linux 
/var/log/guix/drvs/yw//pxpl2gp6z3sjvm7sn8gs6n4mhm2f0g-texlive-20160523b-texmf.tar.xz.drv.bz2

Starting download of 
/gnu/store/xdjl5wxdjghq85nbc9qacgyzh8d54f6y-texlive-20160523b-texmf.tar.xz
From 
ftp://tug.org/historic/systems/texlive/2016/texlive-20160523b-texmf.tar.xz...
 …3b-texmf.tar.xz  1.93GiB       213KiB/s 02:11:46 [################    ]  83.3%
output path 
`/gnu/store/xdjl5wxdjghq85nbc9qacgyzh8d54f6y-texlive-20160523b-texmf.tar.xz' 
should have sha256 hash `1dv8vgfzpczqw82hv9g7a8djhhyzywljmrarlcyy6g2qi5q51glr', 
instead has `1l296b4ypphffv1zpamp01g6a633kqlmfbf9l4x9411rlblb1hfd'
@ build-failed 
/gnu/store/ywpxpl2gp6z3sjvm7sn8gs6n4mhm2f0g-texlive-20160523b-texmf.tar.xz.drv 
- 1 output path 
`/gnu/store/xdjl5wxdjghq85nbc9qacgyzh8d54f6y-texlive-20160523b-texmf.tar.xz' 
should have sha256 hash `1dv8vgfzpczqw82hv9g7a8djhhyzywljmrarlcyy6g2qi5q51glr', 
instead has `1l296b4ypphffv1zpamp01g6a633kqlmfbf9l4x9411rlblb1hfd'
@ build-started /gnu/store/in6vixj9fb9c8f9z3jf42zz9v40dbjxi-serf-1.3.8.drv - 
x86_64-linux 
/var/log/guix/drvs/in//6vixj9fb9c8f9z3jf42zz9v40dbjxi-serf-1.3.8.drv.bz2
cannot build derivation 
`/gnu/store/q9s2wdsaqvrllkcsf8w1a8424zd9ybc1-texlive-20160523b-texmf.tar.xz.drv':
 1 dependencies couldn't be built
cannot build derivation 
`/gnu/store/b7abk0aarqv0ylxp2g4s2sf9j75xdy04-texlive-texmf-2016.drv': 1 
dependencies couldn't be built
cannot build derivation 
`/gnu/store/kpjy0c1pl8vzxbkys6p45ij3za6a92gj-texlive-2016.drv': 1 dependencies 
couldn't be built
cannot build derivation 
`/gnu/store/clnamqpbkkn2k0ji1clbnznx2fyyig2c-sbcl-1.3.7.drv': 1 dependencies 
couldn't be built
guix build: error: build failed: build of 
`/gnu/store/clnamqpbkkn2k0ji1clbnznx2fyyig2c-sbcl-1.3.7.drv' failed
@ build-started 
/gnu/store/ywpxpl2gp6z3sjvm7sn8gs6n4mhm2f0g-texlive-20160523b-texmf.tar.xz.drv 
- x86_64-linux 
/var/log/guix/drvs/yw//pxpl2gp6z3sjvm7sn8gs6n4mhm2f0g-texlive-20160523b-texmf.tar.xz.drv.bz2

Starting download of 
/gnu/store/xdjl5wxdjghq85nbc9qacgyzh8d54f6y-texlive-20160523b-texmf.tar.xz
From 
ftp://tug.org/historic/systems/texlive/2016/texlive-20160523b-texmf.tar.xz...
 …3b-texmf.tar.xz  1.93GiB       213KiB/s 02:11:31 [################    ]  83.1%
output path 
`/gnu/store/xdjl5wxdjghq85nbc9qacgyzh8d54f6y-texlive-20160523b-texmf.tar.xz' 
should have sha256 hash `1dv8vgfzpczqw82hv9g7a8djhhyzywljmrarlcyy6g2qi5q51glr', 
instead has `143zan8sh0lw2jjhdpvc7w9yjh7cw75w1ry60qq4g1n3hjmfrwi3'
@ build-failed 
/gnu/store/ywpxpl2gp6z3sjvm7sn8gs6n4mhm2f0g-texlive-20160523b-texmf.tar.xz.drv 
- 1 output path 
`/gnu/store/xdjl5wxdjghq85nbc9qacgyzh8d54f6y-texlive-20160523b-texmf.tar.xz' 
should have sha256 hash `1dv8vgfzpczqw82hv9g7a8djhhyzywljmrarlcyy6g2qi5q51glr', 
instead has `143zan8sh0lw2jjhdpvc7w9yjh7cw75w1ry60qq4g1n3hjmfrwi3'
@ build-started /gnu/store/in6vixj9fb9c8f9z3jf42zz9v40dbjxi-serf-1.3.8.drv - 
x86_64-linux 
/var/log/guix/drvs/in//6vixj9fb9c8f9z3jf42zz9v40dbjxi-serf-1.3.8.drv.bz2
cannot build derivation 
`/gnu/store/q9s2wdsaqvrllkcsf8w1a8424zd9ybc1-texlive-20160523b-texmf.tar.xz.drv':
 1 dependencies couldn't be built
cannot build derivation 
`/gnu/store/b7abk0aarqv0ylxp2g4s2sf9j75xdy04-texlive-texmf-2016.drv': 1 
dependencies couldn't be built
cannot build derivation 
`/gnu/store/kpjy0c1pl8vzxbkys6p45ij3za6a92gj-texlive-2016.drv': 1 dependencies 
couldn't be built
cannot build derivation 
`/gnu/store/clnamqpbkkn2k0ji1clbnznx2fyyig2c-sbcl-1.3.7.drv': 1 dependencies 
couldn't be built
guix build: error: build failed: build of 
`/gnu/store/clnamqpbkkn2k0ji1clbnznx2fyyig2c-sbcl-1.3.7.drv' failed
@ build-started 
/gnu/store/ywpxpl2gp6z3sjvm7sn8gs6n4mhm2f0g-texlive-20160523b-texmf.tar.xz.drv 
- x86_64-linux 
/var/log/guix/drvs/yw//pxpl2gp6z3sjvm7sn8gs6n4mhm2f0g-texlive-20160523b-texmf.tar.xz.drv.bz2

-- 

  Sergei

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