[GHC] #16259: Hadrian does not work with a cabal v2-installed "happy"

[GHC]

#16259: Hadrian does not work with a cabal v2-installed "happy"
-------------------------------------+-------------------------------------
           Reporter:  RolandSenn     |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Build System   |           Version:  8.6.3
  (Hadrian)                          |
           Keywords:                 |  Operating System:  Linux
       Architecture:                 |   Type of failure:  Building GHC
  Unknown/Multiple                   |  failed
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 I installed happy with:


 {{{
 cabal new-install --symlink-bindir=~/Software/ghc-8.6.3/bin  happy
 }}}

 where  `~/Software/ghc-8.6.3/bin` is in my PATH.

 When I run `hadrian/build.sh -c --flavour=devel2` I get the following
 error:


 {{{
 happy: /home/roland/.cabal/share/x86_64-linux-ghc-8.6.3/happy-1.19.9
 /HappyTemplate-arrays-coerce: openFile: does not exist (No such file or
 directory)
 }}}

 It's correct, I don't have a file `.cabal/share/x86_64-linux-
 ghc-8.6.3/happy-1.19.9/HappyTemplate-arrays-coerce`.

 However I have a file
 `.cabal/store/ghc-8.6.3/happy-1.19.9-84db80555b9a8f54be2ca475bccbc751401ffbff30194c8c26d08a002a665431/share
 /HappyTemplate-arrays-coerce`.

 If I do an old-fashioned `cabal v1-install happy`, it creates the missing
 file `.cabal/share/x86_64-linux-ghc-8.6.3/happy-1.19.9/HappyTemplate-
 arrays-coerce` and Hadrian is now able to build!


 Hadrian should not depend on old-style cabal installs!


 Program versions:

 {{{
 roland at goms:~/Projekte/ghc$ cat /etc/issue
 Debian GNU/Linux 9 \n \l

 roland at goms:~/Projekte/ghc$ ghc --version
 The Glorious Glasgow Haskell Compilation System, version 8.6.3

 roland at goms:~/Projekte/ghc$ hadrian/build.sh --version
 Up to date
 Shake build system, version 0.17.4

 roland at goms:~/Projekte/ghc$ happy --version
 Happy Version 1.19.9 Copyright (c) 1993-1996 Andy Gill, Simon Marlow (c)
 1997-2005 Simon Marlow

 Happy is a Yacc for Haskell, and comes with ABSOLUTELY NO WARRANTY.
 This program is free software; you can redistribute it and/or modify
 it under the terms given in the file 'LICENSE' distributed with
 the Happy sources.

 roland at goms:~/Projekte/ghc$ cabal --version
 cabal-install version 2.4.1.0
 compiled using version 2.4.1.0 of the Cabal library
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16259>
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