bug#25138: failing hackage import

[Ludovic Courtès]

Hi,

Dave Love <address@hidden> skribis:

> With guix 20161208.12 I see the following, which would probably take me
> a while to debug as I don't know my way around.  (With the 0.11.0
> version I got a different error without a backtrace.  I upgraded after
> seeing a bug fix for hackage in the tracker.)
>
>   $ guix import hackage -t darcs
>   Backtrace:
>   In ice-9/boot-9.scm:
>    160: 16 [catch #t #<catch-closure 11e6e40> ...]
>   In unknown file:
>      ?: 15 [apply-smob/1 #<catch-closure 11e6e40>]
>   In ice-9/boot-9.scm:
>     66: 14 [call-with-prompt prompt0 ...]
>   In ice-9/eval.scm:
>    432: 13 [eval # #]
>   In ice-9/boot-9.scm:
>   2404: 12 [save-module-excursion #<procedure 1206900 at 
> ice-9/boot-9.scm:4051:3 ()>]
>   4056: 11 [#<procedure 1206900 at ice-9/boot-9.scm:4051:3 ()>]
>   1727: 10 [%start-stack load-stack ...]
>   1732: 9 [#<procedure 1219b70 ()>]
>   In unknown file:
>      ?: 8 [primitive-load 
> "/gnu/store/hckw4cw3m6r55afrldhn9gf66wrznh7i-guix-0.11.0-8.8d12/bin/.guix-real"]
>   In guix/ui.scm:
>   1222: 7 [run-guix-command import "hackage" "-t" "darcs"]
>   In guix/scripts/import.scm:
>    110: 6 [guix-import "hackage" "-t" "darcs"]
>   In guix/scripts/import/hackage.scm:
>    110: 5 [guix-import-hackage "-t" "darcs"]
>   In guix/import/hackage.scm:
>    247: 4 [hackage->guix-package "darcs" #:include-test-dependencies? ...]
>    113: 3 [hackage-fetch "darcs"]
>   In guix/import/cabal.scm:
>    580: 2 [read-cabal #<input: r6rs-custom-binary-input-port 38ef8f0> #f]
>   In system/base/lalr.upstream.scm:
>   1956: 1 [___run]
>   1851: 0 [___push 1 6 ...]
>   
>   system/base/lalr.upstream.scm:1851:2: In procedure ___push:
>   system/base/lalr.upstream.scm:1851:2: Wrong number of arguments to 
> #<procedure ___push (delta new-category lvalue tok)>

I’m seeing a different error:

--8<---------------cut here---------------start------------->8---
$ git describe
v0.11.0-3322-gf80b4d2
$ ./pre-inst-env guix import hackage -t darcs
Syntax error: unexpected token : (buildable (False)) (at line 494, column 4)
Syntax error: unexpected end of input
guix import: error: failed to download cabal file for package 'darcs'
--8<---------------cut here---------------end--------------->8---

The .cabal file is at
<https://hackage.haskell.org/package/darcs/darcs.cabal> and the faulty
line comes from:

--8<---------------cut here---------------start------------->8---
Executable          darcs
  if !flag(executable)
    buildable: False
  else
    buildable: True
--8<---------------cut here---------------end--------------->8---

In addition, this .cabal file has “Build-Type: Custom”, which is
currently not supported as noted in <https://bugs.gnu.org/23961>.

Federico, WDYT?

Thanks,
Ludo’.