安装像 `hackage-cli` 这样的 Haskell 程序

Question

我要安装这个程序

https://github.com/hackage-trustees/hackage-cli

这样做的简单方法是什么？

如果我尝试使用

在本地构建它

> cabal --version 
cabal-install version 3.4.1.0 
compiled using version 3.4.1.0 of the Cabal library)

我明白了

 ❯ cabal v1-build
Resolving dependencies...
Warning: solver failed to find a solution:
Could not resolve dependencies:
[__0] trying: hackage-cli-0.1.0.0 (user goal)
[__1] next goal: base (dependency of hackage-cli)
[__1] rejecting: base-4.15.1.0/installed-4.15.1.0 (conflict: hackage-cli =>
base>=4.10.0.0 && <4.13)
[__1] fail (backjumping, conflict set: base, hackage-cli)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: hackage-cli, base
Trying configure anyway.
Configuring hackage-cli-0.1.0.0...
cabal: Encountered missing or private dependencies:
Cabal >=2.4.1.0 && <2.5,
aeson >=1.4.2.0 && <2.1,
base >=4.10.0.0 && <4.13,
http-io-streams >=0.1.0.0 && <0.2,
io-streams >=1.5.0.1 && <1.6,
lens >=4.17 && <5.2,
netrc >=0.2.0.0 && <0.3,
optparse-applicative >=0.14 && <0.17,
process-extras >=0.7.4 && <0.8,
semigroups >=0.18.3 && <0.21,
stringsearch >=0.3.6 && <0.4,
tagsoup >=0.14 && <0.15,
tar >=0.5 && <0.6,
unordered-containers >=0.2.7 && <0.3,
zlib >=0.6.1 && <0.7

.

❯ cabal v2-build
Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] trying: hackage-cli-0.1.0.0 (user goal)
[__1] next goal: base (dependency of hackage-cli)
[__1] rejecting: base-4.15.1.0/installed-4.15.1.0 (conflict: hackage-cli =>
base>=4.10.0.0 && <4.13)
[__1] skipping: base-4.16.0.0, base-4.15.1.0, base-4.15.0.0, base-4.14.3.0,
base-4.14.2.0, base-4.14.1.0, base-4.14.0.0, base-4.13.0.0 (has the same
characteristics that caused the previous version to fail: excluded by
constraint '>=4.10.0.0 && <4.13' from 'hackage-cli')
[__1] rejecting: base-4.12.0.0, base-4.11.1.0, base-4.11.0.0, base-4.10.1.0,
base-4.10.0.0, base-4.9.1.0, base-4.9.0.0, base-4.8.2.0, base-4.8.1.0,
base-4.8.0.0, base-4.7.0.2, base-4.7.0.1, base-4.7.0.0, base-4.6.0.1,
base-4.6.0.0, base-4.5.1.0, base-4.5.0.0, base-4.4.1.0, base-4.4.0.0,
base-4.3.1.0, base-4.3.0.0, base-4.2.0.2, base-4.2.0.1, base-4.2.0.0,
base-4.1.0.0, base-4.0.0.0, base-3.0.3.2, base-3.0.3.1 (constraint from
non-upgradeable package requires installed instance)
[__1] fail (backjumping, conflict set: base, hackage-cli)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: base, hackage-cli

.

❯ stack init
Looking for .cabal or package.yaml files to use to init the project.
Using cabal packages:
- ./
- fixtures/

Multiple .cabal files found in directory /Users/nrolland/clones/hackage-cli/fixtures/:
- SVGFonts.2.cabal
- SVGFonts.0.cabal
- SVGFonts.1.cabal
- deepseq.1.cabal
- tree-diff.1.cabal
- semigroups.2.cabal
- semigroups.0.cabal
- tree-diff.0.cabal
- deepseq.0.cabal
- semigroups.1.cabal

Answer 1

简答

解决方法如下。或者，您可以克隆自：

https://github.com/kabuhr/hackage-cli

获得 stack build 就绪版本。请注意，您可能需要在 stack build.

之前 apt install libbrotli-dev 或类似的

长答案

在这里，stack init 被 fixtures 子目录中的一些额外 .cabal 文件所欺骗。您可以通过运行ning stack init --ignore-subdirs 来解决这个问题。这最终选择了解析器 lts-14.27 但随后失败，因为 http-io-streams 不在 Stackage:

Selected resolver: https://raw.githubusercontent.com/
        commercialhaskell/stackage-snapshots/master/lts/14/27.yaml
Resolver 'https://raw.githubusercontent.com/commercialhaskell/
        stackage-snapshots/master/lts/14/27.yaml' does not have all
        the packages to match your requirements.
    http-io-streams not found
        - hackage-cli requires ^>=0.1.0.0

你可以运行:

stack init --resolver lts-14.27 --ignore-subdirs --omit-packages

无论如何都要生成一个stack.yaml，然后为http-io-streams和它依赖的任何东西添加一些extra-deps。经过一番摆弄，我想出了以下 stack.yaml:

resolver: lts-14.27

packages:
- .

extra-deps:
- http-io-streams-0.1.2.0
- brotli-streams-0.0.0.0
- brotli-0.0.0.0

需要一个额外的补丁，因为支持早于 2.0.0.0 的 aeson 版本的代码已损坏。应用以下补丁：

diff --git a/src/IndexShaSum.hs b/src/IndexShaSum.hs
index 0296dff..bdfc4df 100644
--- a/src/IndexShaSum.hs
+++ b/src/IndexShaSum.hs
@@ -35,14 +35,15 @@ import           Data.Semigroup         ((<>))
 #if MIN_VERSION_aeson(2,0,0)
 import qualified Data.Aeson.Key         as Key
 import qualified Data.Aeson.KeyMap      as KeyMap
+type Key = J.Key
 
-keyToText :: J.Key -> Text
+keyToText :: Key -> Text
 keyToText = Key.toText
 #else
 import qualified Data.HashMap.Strict    as KeyMap
 type Key = Text
 
-keyToText :: J.Key -> Text
+keyToText :: Key -> Text
 keyToText = id
 #endif
 
@@ -139,7 +140,7 @@ decodePkgJsonFile bs = do
         go2 m = forM (KeyMap.toList m) $ \(k,v) -> do
             J.withObject ".targets{}" (go3 k) v
 
-        go3 :: J.Key -> J.Object -> J.Parser (ByteString, ByteString)
+        go3 :: Key -> J.Object -> J.Parser (ByteString, ByteString)
         go3 k o = do
             hashes <- o J..: "hashes"
             sh256 <- hashes J..: "sha256"

应用该补丁并安装 stack.yaml 后，您应该可以运行 stack build。如果您在构建软件包 brotli 时遇到错误，您可能需要安装 brotli 库的开发文件（例如，apt install libbrotli-dev 在 Debian 版本上）。

安装像 `hackage-cli` 这样的 Haskell 程序

Installing a Haskell program like `hackage-cli`

haskell

简答

长答案