堆栈/阴谋找不到快乐

Question

我正在尝试使用Haskell构建PCPH编码。但是，我发现了一个关于Cabal找不到happy的错误。不过，我已经安装了alex和happy (它们在/usr/bin中)。

setup-Simple-Cabal-1.22.5.0-ghc-7.10.3: The program 'happy' is required but it
could not be found

--  While building package parconc-examples-0.4.3 using:

下面是堆栈认为我的PATH是什么：

$ stack exec bash
$ echo $PATH | tr : '\n'
/home/steshaw/Projects/parconc-examples/.stack-work/install/x86_64-linux/lts-4.2/7.10.3/bin
/home/steshaw/Projects/shelly/dotfiles/.stack/snapshots/x86_64-linux/lts-4.2/7.10.3/bin
/home/steshaw/Projects/shelly/dotfiles/.stack/programs/x86_64-linux/ghc-7.10.3/bin
/home/steshaw/.nix-profile/bin
/home/steshaw/.nix-profile/sbin
/usr/local/sbin
/usr/local/bin
/home/steshaw/Projects/shelly/bin
/usr/local/sbin
/usr/local/bin
/usr/sbin
/usr/bin
/sbin
/bin
/usr/games
/usr/local/games
/snap/bin

这是stack path的输出

stack-root: /home/steshaw/Projects/shelly/dotfiles/.stack
project-root: /home/steshaw/Projects/parconc-examples
config-location: /home/steshaw/Projects/parconc-examples/stack.yaml
bin-path: /home/steshaw/Projects/shelly/dotfiles/.stack/snapshots/x86_64-linux/lts-4.2/7.10.3/bin:/home/steshaw/Projects/shelly/dotfiles/.stack/programs/x86_64-linux/ghc-7.10.3/bin:/home/steshaw/.nix-profile/bin:/home/steshaw/.nix-profile/sbin:/usr/local/sbin:/usr/local/bin:/home/steshaw/Projects/shelly/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
programs: /home/steshaw/Projects/shelly/dotfiles/.stack/programs/x86_64-linux
compiler-exe: /home/steshaw/Projects/shelly/dotfiles/.stack/programs/x86_64-linux/ghc-7.10.3/bin/ghc
compiler-bin: /home/steshaw/Projects/shelly/dotfiles/.stack/programs/x86_64-linux/ghc-7.10.3/bin
local-bin: /home/steshaw/.local/bin
extra-include-dirs: 
extra-library-dirs: 
snapshot-pkg-db: /home/steshaw/Projects/shelly/dotfiles/.stack/snapshots/x86_64-linux/lts-4.2/7.10.3/pkgdb
local-pkg-db: /home/steshaw/Projects/parconc-examples/.stack-work/install/x86_64-linux/lts-4.2/7.10.3/pkgdb
global-pkg-db: /home/steshaw/Projects/shelly/dotfiles/.stack/programs/x86_64-linux/ghc-7.10.3/lib/ghc-7.10.3/package.conf.d
ghc-package-path: /home/steshaw/Projects/parconc-examples/.stack-work/install/x86_64-linux/lts-4.2/7.10.3/pkgdb:/home/steshaw/Projects/shelly/dotfiles/.stack/snapshots/x86_64-linux/lts-4.2/7.10.3/pkgdb:/home/steshaw/Projects/shelly/dotfiles/.stack/programs/x86_64-linux/ghc-7.10.3/lib/ghc-7.10.3/package.conf.d
snapshot-install-root: /home/steshaw/Projects/shelly/dotfiles/.stack/snapshots/x86_64-linux/lts-4.2/7.10.3
local-install-root: /home/steshaw/Projects/parconc-examples/.stack-work/install/x86_64-linux/lts-4.2/7.10.3
snapshot-doc-root: /home/steshaw/Projects/shelly/dotfiles/.stack/snapshots/x86_64-linux/lts-4.2/7.10.3/doc
local-doc-root: /home/steshaw/Projects/parconc-examples/.stack-work/install/x86_64-linux/lts-4.2/7.10.3/doc
dist-dir: .stack-work/dist/x86_64-linux/Cabal-1.22.5.0
local-hpc-root: /home/steshaw/Projects/parconc-examples/.stack-work/install/x86_64-linux/lts-4.2/7.10.3/hpc
local-bin-path: /home/steshaw/.local/bin
ghc-paths: /home/steshaw/Projects/shelly/dotfiles/.stack/programs/x86_64-linux

下面是堆栈在我的路径上找到的快乐版本：

$ stack exec -- happy -V
Happy Version 1.19.5 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.

我在Ubuntu16.04.1LTS (x86_64)上。

Answer 1

有两件事值得尝试：

1. 通过堆栈安装愉快，使用项目的解析器： 堆栈安装快乐-解析器lts-4.2

当我用解析器lts-4.2构建parconc示例时，我发现它使用的是lts-4.2快照目录中的愉快二进制文件，尽管我在路径的其他地方安装了它。

1. 使用这个Setup.hs程序： 导入Distribution.Simple System.Environment main = do args <- getArgs让args‘= if elem“配置”args然后args ++ -with-System.Environment=/usr/bin/getArgs“++ defaultMainWithArgs args”

并确保将parconc-examples.caral中的build-type:更改为Custom。完全删除. sure目录，以确保使用新的安装程序重建所有内容。