Question

我需要在ruby控制台中运行 npm以使用指南针运行grunt，但是当我在ruby控制台中键入npm时说“npm不是命令”但是当我在节点控制台中键入时效果很好。一些帮助？谢谢！

Answer 1

[我]需要在ruby控制台中运行npm

#system方法，“在子shell中执行命令....”，请参阅：http://ruby-doc.org/core-2.2.0/Kernel.html#method-i-system

$ irb
irb(main):001:0> system('npm')

Usage: npm <command>

where <command> is one of:
    access, adduser, bin, bugs, c, cache, completion, config,
    ddp, dedupe, deprecate, dist-tag, docs, edit, explore, get,
    help, help-search, i, init, install, install-test, it, link,
    list, ln, logout, ls, outdated, owner, pack, ping, prefix,
    prune, publish, rb, rebuild, repo, restart, root, run,
    run-script, s, se, search, set, shrinkwrap, star, stars,
    start, stop, t, tag, team, test, tst, un, uninstall,
    unpublish, unstar, up, update, v, version, view, whoami

npm <cmd> -h     quick help on <cmd>
npm -l           display full usage info
npm help <term>  search for help on <term>
npm help npm     involved overview

Specify configs in the ini-formatted file:
    /Users/dev/.npmrc
or on the command line via: npm <command> --key value
Config info can be viewed via: npm help config

npm@3.8.9 /usr/local/lib/node_modules/npm
=> false
irb(main):002:0>

或者，反引号（`cmd` ）返回“子shell中运行cmd的标准输出。”，请参阅：http://ruby-doc.org/core-2.2.0/Kernel.html#method-i-60

$ irb
irb(main):001:0> puts `npm`

Usage: npm <command>

where <command> is one of:
    access, adduser, bin, bugs, c, cache, completion, config,
    ddp, dedupe, deprecate, dist-tag, docs, edit, explore, get,
    help, help-search, i, init, install, install-test, it, link,
    list, ln, logout, ls, outdated, owner, pack, ping, prefix,
    prune, publish, rb, rebuild, repo, restart, root, run,
    run-script, s, se, search, set, shrinkwrap, star, stars,
    start, stop, t, tag, team, test, tst, un, uninstall,
    unpublish, unstar, up, update, v, version, view, whoami

npm <cmd> -h     quick help on <cmd>
npm -l           display full usage info
npm help <term>  search for help on <term>
npm help npm     involved overview

Specify configs in the ini-formatted file:
    /Users/dev/.npmrc
or on the command line via: npm <command> --key value
Config info can be viewed via: npm help config

npm@3.8.9 /usr/local/lib/node_modules/npm
=> nil
irb(main):002:0>

为什么我不能在ruby控制台中运行npm，但在节点控制台中运行良好？

1 个答案: