node.js - instalar - npm registry

¿Qué significa npm por ''Saltarse la dependencia opcional fallida''?

Question

La última versión de node y npm causa problemas al ejecutar el karma. Cuando trato de instalar karma-cli npm i -g karma karma-cli recibo la siguiente advertencia:

npm WARN optional Skipping failed optional dependency /chokidar/fsevents:
npm WARN notsup Not compatible with your operating system or architecture: [email protected]
npm WARN optional Skipping failed optional dependency /gulp-karma/chokidar/fsevents:
npm WARN notsup Not compatible with your operating system or architecture: [email protected]

Y cuando trato de ejecutar la karma test , obtengo el siguiente error:

"C:/Program Files/nodejs/node.exe" "C:/Program Files (x86)/JetBrains/WebStorm 11.0.3/plugins/js-karma/js_reporter/karma-intellij/lib/intellijServer.js" --karmaPackageDir=C:/Users/xxx/AppData/Roaming/npm/node_modules/karma --configFile=C:/Users/xxx/Documents/project/karma.conf.js
26 02 2016 11:24:07.871:WARN [plugin]: Cannot find plugin "karma-chrome-launcher".
  Did you forget to install it ?
  npm install karma-chrome-launcher --save-dev
26 02 2016 11:24:07.877:WARN [plugin]: Cannot find plugin "karma-firefox-launcher".
  Did you forget to install it ?
  npm install karma-firefox-launcher --save-dev
26 02 2016 11:24:07.878:WARN [plugin]: Cannot find plugin "karma-phantomjs-launcher".
  Did you forget to install it ?
  npm install karma-phantomjs-launcher --save-dev
26 02 2016 11:24:07.879:WARN [plugin]: Cannot find plugin "karma-jasmine".
  Did you forget to install it ?
  npm install karma-jasmine --save-dev
26 02 2016 11:24:07.880:WARN [plugin]: Cannot find plugin "karma-junit-reporter".
  Did you forget to install it ?
  npm install karma-junit-reporter --save-dev
26 02 2016 11:24:07.885:WARN [plugin]: Cannot find plugin "karma-teamcity-reporter".
  Did you forget to install it ?
  npm install karma-teamcity-reporter --save-dev
26 02 2016 11:24:07.887:WARN [plugin]: Cannot find plugin "karma-coverage".
  Did you forget to install it ?
  npm install karma-coverage --save-dev
26 02 2016 11:24:07.888:WARN [plugin]: Cannot find plugin "karma-jasmine-html-reporter".
  Did you forget to install it ?
  npm install karma-jasmine-html-reporter --save-dev
26 02 2016 11:24:07.889:WARN [plugin]: Cannot find plugin "karma-ng-html2js-preprocessor".
  Did you forget to install it ?
  npm install karma-ng-html2js-preprocessor --save-dev
26 02 2016 11:24:07.890:WARN [plugin]: Cannot find plugin "karma-browserify".
  Did you forget to install it ?
  npm install karma-browserify --save-dev
26 02 2016 11:24:07.893:WARN [preprocess]: Can not load "coverage", it is not registered!
  Perhaps you are missing some plugin?
26 02 2016 11:24:07.893:WARN [preprocess]: Can not load "ng-html2js", it is not registered!
  Perhaps you are missing some plugin?
26 02 2016 11:24:07.893:WARN [preprocess]: Can not load "browserify", it is not registered!
  Perhaps you are missing some plugin?
26 02 2016 11:24:07.901:WARN [reporter]: Can not load "coverage", it is not registered!
  Perhaps you are missing some plugin?
26 02 2016 11:24:07.901:WARN [reporter]: Can not load "junit", it is not registered!
  Perhaps you are missing some plugin?
C:/Users/xxx/AppData/Roaming/npm/node_modules/karma/node_modules/di/lib/injector.js:9
      throw error(''No provider for "'' + name + ''"!'');
      ^

Error: No provider for "framework:jasmine"! (Resolving: framework:jasmine)
    at error (C:/Users/xxx/AppData/Roaming/npm/node_modules/karma/node_modules/di/lib/injector.js:22:12)
    at Object.parent.get (C:/Users/xxx/AppData/Roaming/npm/node_modules/karma/node_modules/di/lib/injector.js:9:13)
    at get (C:/Users/xxx/AppData/Roaming/npm/node_modules/karma/node_modules/di/lib/injector.js:54:19)
    at C:/Users/xxx/AppData/Roaming/npm/node_modules/karma/lib/server.js:138:20
    at Array.forEach (native)
    at Server._start (C:/Users/xxx/AppData/Roaming/npm/node_modules/karma/lib/server.js:137:21)
    at invoke (C:/Users/xxx/AppData/Roaming/npm/node_modules/karma/node_modules/di/lib/injector.js:75:15)
    at Server.start (C:/Users/xxx/AppData/Roaming/npm/node_modules/karma/lib/server.js:102:18)
    at Object.<anonymous> (C:/Program Files (x86)/JetBrains/WebStorm 11.0.3/plugins/js-karma/js_reporter/karma-intellij/lib/intellijServer.js:12:13)
    at Module._compile (module.js:410:26)
    at Object.Module._extensions..js (module.js:417:10)
    at Module.load (module.js:344:32)
    at Function.Module._load (module.js:301:12)
    at Function.Module.runMain (module.js:442:10)
    at startup (node.js:136:18)
    at node.js:966:3

Process finished with exit code 1

Mi especificación de configuración de la siguiente manera:

Versión del nodo: v4.3.0
Versión de NPM: 3.7.3

Cualquier ayuda será muy apreciada para solucionar esto, no puedo instalar la versión de karma, creo que no está instalada correctamente en mi máquina.

Answer 1

Esto no es un error. Es una advertencia de que fseventsd , que es específico de Mac OS, no se puede instalar en Linux.

No hay necesidad de alarmarse, y el paquete que necesita fsevents seguirá funcionando, por eso es una dependencia opcional.

Como muchas personas están confundidas al respecto (sobre todo porque esto solía ser un error real, no una advertencia), hay un error abierto para convertir la advertencia actual en una INFO.

Además, el hilo ya lo hace.