在 nixos 上使用 yarn 运行时 elm-make 无法编译

Question

elm我正在处理的项目yarn上nixos我无法编译。对于我使用 macOS 的同事来说，这个项目编译成功；在我的机器上编译失败可能和我使用NixOS有关。

当我运行$ yarn start时我得到以下终端输出:

$ yarn start
yarn start v0.20.3
$ webpack-dev-server --env dev 
env dev
Project is running at http://0.0.0.0:3000/
webpack output is served from /
Content not from webpack is served from /home/matthew/backup/azara_work/platform/web/src
404s will fallback to /index.html
Running elm-make /home/matthew/backup/azara_work/platform/web/src/App.elm --yes --warn --debug --output /tmp/117814-7766-1wq3nh5.xanii6yldi.js

当我尝试加载 http://0.0.0.0:3000/ 的页面时我的浏览器控制台显示以下错误:

VM1496:1 Uncaught Error: Module build failed: Error: Compiler process exited with error Compilation failed
events.js:160
      throw er; // Unhandled 'error' event
      ^

Error: spawn /home/matthew/backup/azara_work/platform/web/node_modules/elm/Elm-Platform/0.18.0/.cabal-sandbox/bin/elm-make ENOENT
    at exports._errnoException (util.js:1018:11)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:193:32)
    at onErrorNT (internal/child_process.js:367:16)
    at _combinedTickCallback (internal/process/next_tick.js:80:11)
    at process._tickCallback (internal/process/next_tick.js:104:9)
    at Module.runMain (module.js:606:11)
    at run (bootstrap_node.js:389:7)
    at startup (bootstrap_node.js:149:9)
    at bootstrap_node.js:504:3

    at ChildProcess.<anonymous> (/home/matthew/backup/azara_work/platform/web/node_modules/node-elm-compiler/index.js:141:27)
    at emitTwo (events.js:106:13)
    at ChildProcess.emit (events.js:191:7)
    at maybeClose (internal/child_process.js:891:16)
    at Socket.<anonymous> (internal/child_process.js:342:11)
    at emitOne (events.js:96:13)
    at Socket.emit (events.js:188:7)
    at Pipe._handle.close [as _onclose] (net.js:497:12)
    at exports._errnoException (util.js:1018:11)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:193:32)
    at onErrorNT (internal/child_process.js:367:16)
    at _combinedTickCallback (internal/process/next_tick.js:80:11)
    at process._tickCallback (internal/process/next_tick.js:104:9)
    at Module.runMain (module.js:606:11)
    at run (bootstrap_node.js:389:7)
    at startup (bootstrap_node.js:149:9)
    at bootstrap_node.js:504:3

    at ChildProcess.<anonymous> (/home/matthew/backup/azara_work/platform/web/node_modules/node-elm-compiler/index.js:141:27)
    at emitTwo (events.js:106:13)
    at ChildProcess.emit (events.js:191:7)
    at maybeClose (internal/child_process.js:891:16)
    at Socket.<anonymous> (internal/child_process.js:342:11)
    at emitOne (events.js:96:13)
    at Socket.emit (events.js:188:7)
    at Pipe._handle.close [as _onclose] (net.js:497:12)
    at eval (eval at ./src/App.elm (http://0.0.0.0:3000/index.js:4316:1), <anonymous>:1:7)
    at Object../src/App.elm (http://0.0.0.0:3000/index.js:4316:1)
    at __webpack_require__ (http://0.0.0.0:3000/index.js:658:30)
    at fn (http://0.0.0.0:3000/index.js:86:20)
    at eval (eval at ./src/index.js (http://0.0.0.0:3000/index.js:4324:1), <anonymous>:7:13)
    at Object../src/index.js (http://0.0.0.0:3000/index.js:4324:1)
    at __webpack_require__ (http://0.0.0.0:3000/index.js:658:30)
    at fn (http://0.0.0.0:3000/index.js:86:20)
    at Object.0 (http://0.0.0.0:3000/index.js:4333:18)
    at __webpack_require__ (http://0.0.0.0:3000/index.js:658:30)

和

./src/App.elm
Module build failed: Error: Compiler process exited with error Compilation failed
events.js:160
      throw er; // Unhandled 'error' event
      ^

Error: spawn /home/matthew/backup/azara_work/platform/web/node_modules/elm/Elm-Platform/0.18.0/.cabal-sandbox/bin/elm-make ENOENT
    at exports._errnoException (util.js:1018:11)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:193:32)
    at onErrorNT (internal/child_process.js:367:16)
    at _combinedTickCallback (internal/process/next_tick.js:80:11)
    at process._tickCallback (internal/process/next_tick.js:104:9)
    at Module.runMain (module.js:606:11)
    at run (bootstrap_node.js:389:7)
    at startup (bootstrap_node.js:149:9)
    at bootstrap_node.js:504:3

    at ChildProcess.<anonymous> (/home/matthew/backup/azara_work/platform/web/node_modules/node-elm-compiler/index.js:141:27)
    at emitTwo (events.js:106:13)
    at ChildProcess.emit (events.js:191:7)
    at maybeClose (internal/child_process.js:891:16)
    at Socket.<anonymous> (internal/child_process.js:342:11)
    at emitOne (events.js:96:13)
    at Socket.emit (events.js:188:7)
    at Pipe._handle.close [as _onclose] (net.js:497:12)
 @ ./src/index.js 2:12-32
 @ multi (webpack)-dev-server/client?http://0.0.0.0:3000 webpack/hot/dev-server ./src/index.js

看来这个问题可能与elm-make有关。 ，因为这出现在两个错误中。我的路径找到 elm-make在

$ which elm-make
/home/matthew/.nix-profile/bin/elm-make

该位置与错误报告的路径不同，它试图查找 elm-make (/home/matthew/backup/azara_work/platform/web/node_modules/elm/Elm-Platform/0.18.0/.cabal-sandbox/bin/elm-make)。我想知道这是否与问题有关。

在错误列出的目录中，elm-make通过ls列出时似乎确实存在:

$ ls /home/matthew/backup/azara_work/platform/web/node_modules/elm/Elm-Platform/0.18.0/.cabal-sandbox/bin/
elm  elm-make  elm-package  elm-reactor  elm-repl

但是，当我尝试运行 yarn start 中列出的命令时的输出，除了替换 elm-make在此节点模块路径中使用 elm-make 时，我收到“没有此类文件或目录”错误。

$ ./node_modules/elm/Elm-Platform/0.18.0/.cabal-sandbox/bin/elm-make /home/matthew/backup/azara_work/platform/web/src/App.elm --yes --warn --debug --output /tmp/117814-7422-1p5ad15.q2uqqzd7vi.js
-bash: ./node_modules/elm/Elm-Platform/0.18.0/.cabal-sandbox/bin/elm-make: No such file or directory

为什么在尝试运行此“节点模块”时会出现“没有此类文件或目录”错误 elm-make当通过ls列出时可执行文件清晰可见？

是否由于我的路径 elm-make 之间的路径位置差异而导致编译失败另一个在“节点模块”下？也许 yarn 使用了错误的 yarn 。如果是这样，我如何设置 yarn 以使用正确的elm-make ？

我怎样才能得到yarn start成功编译项目？

非常感谢您的建议；我已经被这个问题困扰了一段时间了。

Answer 1

我建议您将 elm 安装设置为 NixOS 的可选(以某种方式)。如果您创建一个每个人都使用的 shell.nix 并且完全避免通过 npm 依赖 nix，通常是最简单的。

elm-make 不存在的原因是 ELF 解释器，它位于 NixOS 的不同位置。

尝试ldd ./node_modules/elm/Elm-Platform/0.18.0/.cabal-sandbox/bin/elm-make

快速修复方法是对 ls -la $(nix-build -A elmPackages.elm '<nixpkgs>')/bin 中的所有二进制文件进行符号链接(symbolic link)到你的 cabal 沙箱。