模块构建失败，错误：找不到 css

问题描述

当我尝试从 angular 7 升级到 8 时出现以下错误。

ERROR in ./src/css/styles.scss (./node_modules/@angular-devkit/build-angular/src/angular-cli-files/plugins/raw-css-loader.js!./node_modules/postcss-loader/src??embedded!./node_modules/sass-loader/lib/loader.js??ref--15-3!./src/css/styles.scss)

模块构建失败（来自 ./node_modules/postcss-loader/src/index.js）：

Error: Failed to find 'assets/fonts/my-css/mycss.css'
  in [
    \src\css
  ]
    at resolveModule.catch.catch (\node_modules\postcss-import\lib\resolve-id.js:35:13)

这是我的 package.json

{
  "name": "testproject","version": "1.7.0","license": "MIT","scripts": {
    "ng": "ng","start": "ng serve --proxy-config proxy.config.json","build": "ng build","test": "ng test","lint": "ng lint","e2e": "ng e2e"
  },"private": true,"dependencies": {
    "@angular/animations": "~8.2.4","@angular/cdk": "~8.1.4","@angular/common": "~8.2.4","@angular/compiler": "~8.2.4","@angular/core": "~8.2.4","@angular/forms": "~8.2.4","@angular/material": "~8.1.4","@angular/material-moment-adapter": "~8.2.3","@angular/platform-browser": "~8.2.4","@angular/platform-browser-dynamic": "~8.2.4","@angular/router": "~8.2.4","@ng-select/ng-select": "^3.0.0","@tinymce/tinymce-angular": "^3.6.1","ag-grid": "^17.1.1","ag-grid-angular": "^17.1.0","angular2-lightBox": "^1.4.1","bootstrap": "^4.6.0","chart.js": "^2.9.4","core-js": "^3.3.1","file-saver": "^2.0.2","font-awesome": "^4.7.0","hammerjs": "^2.0.8","jquery": "^3.6.0","lodash": "^4.17.21","moment": "^2.29.1","mydaterangepicker": "4.2.1","ng2-pdf-viewer": "^5.3.4","ngx-bootstrap": "^5.6.0","ngx-moment": "^5.0.0","popper.js": "^1.16.1","primeng": "7.0.3","rxjs": "~6.5.2","rxjs-compat": "~6.5.2","rxjs-tslint": "^0.1.8","tinymce": "^4.9.11","ts-helpers": "^1.1.2","ts-md5": "^1.2.9","zone.js": "^0.9.1"
  },"devDependencies": {
    "@angular-devkit/build-angular": "^0.803.1","@angular/cli": "~8.3.1","@angular/compiler-cli": "~8.2.4","@angular/language-service": "~8.2.4","@types/jasmine": "~3.4.0","@types/jasminewd2": "~2.0.6","@types/lodash": "4.14.108","@types/node": "~8.9.4","codelyzer": "~5.1.0","jasmine-core": "~3.4.0","jasmine-spec-reporter": "~4.2.1","karma": "~4.2.0","karma-chrome-launcher": "~3.1.0","karma-cli": "~2.0.0","karma-coverage-istanbul-reporter": "~2.1.0","karma-jasmine": "~2.0.1","karma-jasmine-html-reporter": "~1.4.2","protractor": "~5.4.2","ts-node": "~8.3.0","tslint": "~5.20.1","typescript": "~3.5.3","webdriver-manager": "12.0.6"
  }
}

angular.json

{
  "$schema": "./node_modules/@angular/cli/lib/config/schema.json","version": 1,"newProjectRoot": "projects","projects": {
    "Tool": {
      "root": "","sourceRoot": "src","projectType": "application","architect": {
        "build": {
          "builder": "@angular-devkit/build-angular:browser","options": {
            "outputPath": "dist","index": "src/index.html","main": "src/main.ts","tsConfig": "src/tsconfig.app.json","preserveSymlinks": true,"polyfills": "src/polyfills.ts","assets": [
              "src/assets","src/favicon.ico"
            ],"styles": [
              "node_modules/bootstrap/dist/css/bootstrap.min.css","node_modules/font-awesome/css/font-awesome.min.css","node_modules/primeng/resources/primeng.min.css","node_modules/ag-grid/dist/styles/ag-grid.css","node_modules/ag-grid/dist/styles/theme-fresh.css","node_modules/angular2-lightBox/lightBox.css","src/css/styles.scss"
            ],"scripts": [
              "node_modules/jquery/dist/jquery.js","node_modules/moment/min/moment.min.js","node_modules/tinymce/tinymce.js","node_modules/tinymce/themes/modern/theme.js","node_modules/chart.js/dist/Chart.js"
            ]
          },"configurations": {
            "production": {
              "optimization": true,"outputHashing": "all","sourceMap": false,"extractCss": true,"namedChunks": false,"aot": true,"extractLicenses": true,"vendorChunk": false,"buildOptimizer": true,"fileReplacements": [
                {
                  "replace": "src/environments/environment.ts","with": "src/environments/environment.prod.ts"
                }
              ]
            }
          }
        },"serve": {
          "builder": "@angular-devkit/build-angular:dev-server","options": {            
            "browserTarget": "Tool:build"            
          },"configurations": {
            "production": {
              "browserTarget": "Tool:build:production"
            }
          }
        },"extract-i18n": {
          "builder": "@angular-devkit/build-angular:extract-i18n","options": {
            "browserTarget": "Tool:build"
          }
        },"test": {
          "builder": "@angular-devkit/build-angular:karma","options": {
            "main": "src/test.ts","karmaConfig": "./karma.conf.js","tsConfig": "src/tsconfig.spec.json","node_modules/chart.js/dist/Chart.js"
            ],"src/favicon.ico"
            ]
          }
        },"lint": {
          "builder": "@angular-devkit/build-angular:tslint","options": {
            "tsConfig": [
              "src/tsconfig.app.json","src/tsconfig.spec.json"
            ],"exclude": [
              "**/node_modules/**"
            ]
          }
        }
      }
    },"Tool-e2e": {
      "root": "e2e","sourceRoot": "e2e","architect": {
        "e2e": {
          "builder": "@angular-devkit/build-angular:protractor","options": {
            "protractorConfig": "./protractor.conf.js","devServerTarget": "Tool:serve"
          }
        },"options": {
            "tsConfig": [
              "e2e/tsconfig.e2e.json"
            ],"exclude": [
              "**/node_modules/**"
            ]
          }
        }
      }
    }
  },"defaultProject": "Tool","schematics": {
    "@schematics/angular:component": {
      "prefix": "app","styleext": "scss"
    },"@schematics/angular:directive": {
      "prefix": "app"
    }
  }
}

解决方法

当我改变路径时错误消失了 @import "~assets/fonts/my-css/mycss.css"; 到 @import "~../assets/fonts/my-css/mycss.css"; 在_material.theme.css