Webpack、sass-loader（或 css-loader）在 node_modules 中嵌套文件导入。文件未找到
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【中文标题】Webpack、sass-loader（或 css-loader）在 node_modules 中嵌套文件导入。文件未找到【英文标题】：Webpack, sass-loader (or css-loader) nested file imports inside node_modules. File not found 【发布时间】：2018-02-12 03:07:47 【问题描述】：我想使用primercss 框架作为sass。我正在使用 webpack 来构建我的应用程序。我已经下载了 npm 包并使用：@import "~primer-css/index.scss"; 将其导入。问题是构建失败并出现以下错误：File to import not found or unreadable: primer-core/index.scss，这是primer-css/index.scss 文件中的子导入。我认为是webpack sass-loader或者css-loader相关的问题，全栈trace如下：
ERROR in ./node_modules/css-loader?"modules":true,"minimize":true,"sourceMap":true,"importLoaders":2,"localIdentName":"[name]__[local]"!./node_modules/postcss-loader/lib?"config":"path":"/Users/vicaba/Projects/medself/medself-client/development/webpack/postcss.config.js","sourceMap":true!./node_modules/sass-loader/lib/loader.js?"outputStyle":"expanded","sourceMap":true,"sourceMapContents":true!./src/theme/theme.scss
Module build failed:
@import "primer-core/index.scss";
^
File to import not found or unreadable: primer-core/index.scss.
Parent style sheet: /Users/vicaba/Projects/medself/medself-client/development/node_modules/primer-css/index.scss
in /Users/vicaba/Projects/medself/medself-client/development/node_modules/primer-css/index.scss (line 14, column 1)
Error:
@import "primer-core/index.scss";
^
File to import not found or unreadable: primer-core/index.scss.
Parent style sheet: /Users/vicaba/Projects/medself/medself-client/development/node_modules/primer-css/index.scss
in /Users/vicaba/Projects/medself/medself-client/development/node_modules/primer-css/index.scss (line 14, column 1)
at options.error (/Users/vicaba/Projects/medself/medself-client/development/node_modules/node-sass/lib/index.js:291:26)
@ ./src/theme/theme.scss 4:14-200
@ ./src/bootstrap.js
@ multi ./src/bootstrap.js
ERROR in ./src/theme/theme.scss
Module build failed: ModuleBuildError: Module build failed:
@import "primer-core/index.scss";
^
File to import not found or unreadable: primer-core/index.scss.
Parent style sheet: /Users/vicaba/Projects/medself/medself-client/development/node_modules/primer-css/index.scss
in /Users/vicaba/Projects/medself/medself-client/development/node_modules/primer-css/index.scss (line 14, column 1)
at runLoaders (/Users/vicaba/Projects/medself/medself-client/development/node_modules/webpack/lib/NormalModule.js:194:19)
at /Users/vicaba/Projects/medself/medself-client/development/node_modules/loader-runner/lib/LoaderRunner.js:364:11
at /Users/vicaba/Projects/medself/medself-client/development/node_modules/loader-runner/lib/LoaderRunner.js:230:18
at context.callback (/Users/vicaba/Projects/medself/medself-client/development/node_modules/loader-runner/lib/LoaderRunner.js:111:13)
at Object.asyncSassJobQueue.push [as callback] (/Users/vicaba/Projects/medself/medself-client/development/node_modules/sass-loader/lib/loader.js:55:13)
at Object.<anonymous> (/Users/vicaba/Projects/medself/medself-client/development/node_modules/async/dist/async.js:2244:31)
at Object.callback (/Users/vicaba/Projects/medself/medself-client/development/node_modules/async/dist/async.js:906:16)
at options.error (/Users/vicaba/Projects/medself/medself-client/development/node_modules/node-sass/lib/index.js:294:32)
loaders配置如下：
test: /\.scss$/,
use: ExtractTextPlugin.extract(
fallback: 'style-loader',
use: [
loader: 'css-loader',
options:
modules: true,
minimize: true,
sourceMap: true,
importLoaders: 2,
localIdentName: '[name]__[local]'
,
loader: 'postcss-loader',
options:
config:
path: path.resolve(__dirname, 'postcss.config.js')
,
sourceMap: true
,
loader: 'sass-loader',
options:
outputStyle: 'expanded',
sourceMap: true,
sourceMapContents: true
]
)
谁能帮帮我？或者对问题有所了解？
【问题讨论】：
【参考方案1】：所以我想我应该说这个问题似乎非常没有解决，甚至不清楚是否会解决，因为 sass-loader 官方说没有问题，因为这node-sass 应该如何工作。
如果人们有兴趣阅读官方问题线程，它仍然在 github 上的here 上打开。线程中描述了一些快速的技巧，但没有一个对我有用，尽管它们基本上都做同样的事情，包括 sass-imports 中的 node_modules 文件夹。
他们这样做的原因是因为正如您所描述的，当您有一个看起来像这样的简单文件时：
@import "~primer-css/index.scss";
这确实依赖于 node_modules 文件夹中的子导入或外部 SASS 文件。具体来说，这些：
/*!
* Primer
* http://primer.github.io
*
* Released under MIT license. Copyright (c) 2017 GitHub Inc.
*/
// Primer master file
//
// Imports all Primer files in their intended order for easy mass-inclusion.
// Should you need specific files, you can easily use separate `@import`s.
// Global requirements
@import "primer-core/index.scss";
@import "primer-product/index.scss";
@import "primer-marketing/index.scss";
因为这些子导入中没有一个前面有 ~，所以它们没有被解析。
事实上，如果你只是尝试编译primer-support/index.scss，它实际上会开箱即用，因为它的所有导入只依赖于它自己的模块，因此它可以解析：
// variables
@import "./lib/variables/typography.scss";
@import "./lib/variables/colors.scss";
@import "./lib/variables/layout.scss";
@import "./lib/variables/misc.scss";
// mixins
@import "./lib/mixins/typography.scss";
@import "./lib/mixins/layout.scss";
@import "./lib/mixins/buttons.scss";
@import "./lib/mixins/misc.scss";
尽管如此，经过比应该花费更长的时间之后，似乎确实有办法解决这个问题，如commented in this post
test: /\.s?css$/,
loaders: [
'css',
'sass?includePaths[]='+ path.resolve(__dirname, 'node_modules') +
'&includePaths[]='+ path.resolve(__dirname, 'bower_components')
// tells sass-loader to look in these dirs when resolving files
]
我改成了：
test: /\.scss$/,
use: ExtractTextPlugin.extract(
fallback: "style-loader",
use: "css-loader?importLoaders=1!postcss-loader!sass-loader?includePaths[]=" + resolve(__dirname, 'node_modules')
)
因为我只希望它检查 SCSS，而且我希望将我的 CSS 和 SCSS 捆绑并缩小在一起。
但是，这可能对大多数人不起作用，所以我想修复您的代码示例，它看起来像：
loader: 'sass-loader',
options:
config:
path: path.resolve(__dirname, 'node_modules')
,
outputStyle: 'expanded',
sourceMap: true,
sourceMapContents: true
但我发现config 相当棘手，所以最终我认为包含它的最简单方法是将加载程序use 修改为：
sass-loader?includePaths[]=" + resolve(__dirname, 'node_modules')
【讨论】：
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