.vimrc

  function! PreviewModule(name, ...)
    if empty(a:name) | echo "need module name" | return | endif
    if empty(a:000)
      let res = system("findmodule ".a:name)
      let file = res
    else
      let type = a:000[0]
      let res = system("moduledir ".a:name)
      if type ==? 'doc'
        let file = res . "/readme.md"
        if !filereadable(file)
          let file = res . "/Readme.md"
          if !filereadable(file)
            let file = res . "/README.md"
            if !filereadable(file)
              echo 'readme file not found'
            endif
          endif
        endif
      elseif type ==? 'json'
        let file = res . "/package.json"
      endif
    endif
    if v:shell_error | echo res | return | endif
    let h = &previewheight
    let &previewheight = 40
    execute "pedit " . file
    let &previewheight = h
    execute "normal! \<c-w>k"
  endfunction
  
  function! ListModules(A, L, p)
    let res = system("dependencies")
    if v:shell_error | echo res | return | endif
    return res
  endfunction

  
  " E module 预览模块主文件
  command! -nargs=1 -complete=custom,ListModules E :call PreviewModule('<args>')
  " J module 预览模块 package.json
  command! -nargs=1 -complete=custom,ListModules J :call PreviewModule('<args>', 'json')
  " H module 查看模块帮助
  command! -nargs=1 -complete=custom,ListModules H :call PreviewModule('<args>', 'doc')

dependencies.js

#!/usr/bin/env node
# 列出所有 dependencies 模块，用于自动补全，支持 browser 属性
var fs = require('fs')
var path = require('path')
var moduleName = process.argv[2]
var dir = process.cwd()

function exit(msg, code) {
  console.error(msg)
  process.exit(1)
}

function locate(folder, name) {
  if(folder === '/') return ''
  var f= path.join(folder, name)
  if (fs.existsSync(f)) {
    return f
  } else {
    return locate(path.resolve(folder, '..'), name)
  }
}

var f = locate(dir, 'package.json')
if (!f) exit('package.json not found in ' + dir)
var o = require(f)
if (o.browser && o.browser[moduleName]) {
  var str = o.browser[moduleName]
  if (typeof str === 'string') {
    moduleName = str
  }
}

var deps = Object.keys(o.dependencies)

var browsers = Object.keys(o.browser).map(function (key) {
  return o.browser[key]
})

var deps = deps.filter(function (n) {
  return browsers.indexOf(n) === -1
})

deps = deps.concat(Object.keys(o.browser))
deps.forEach(function (dep) {
  console.log(dep)
})

findmodule

#!/usr/bin/env node
# 根据模块名找到它的根目录
# 可执行文件，请确保放到 path 下面，并添加可执行权限

var fs = require('fs')
var path = require('path')
var moduleName = process.argv[2]
var dir = process.cwd()

function exit(msg, code) {
  console.error(msg)
  process.exit(1)
}


function locate(folder, name) {
  if(folder === '/') return ''
  var f= path.join(folder, name)
  if (fs.existsSync(f)) {
    return f
  } else {
    return locate(path.resolve(folder, '..'), name)
  }
}

var f = locate(dir, 'package.json')
if (!f) exit('package.json not found in ' + dir)
var o = require(f)
if (o.browser && o.browser[moduleName]) {
  var str = o.browser[moduleName]
  if (typeof str === 'string') {
    moduleName = str
  }
}

var folder = path.resolve(path.dirname(f), 'node_modules', moduleName)
if (!fs.existsSync(folder)) exit('module folder for ' + moduleName +  ' not found')

try {
  o = require(path.join(folder, 'package.json'))
} catch(e) {
  exit('package.json not found under ' + folder)
}
o.main = o.main || 'index.js'
if (path.extname(o.main) === '') o.main = o.main + '.js'
var fullpath = path.join(folder, o.main)
process.stdout.write(fullpath)

moduledir.fish

#! /usr/local/bin/fish

set module $argv[1]
if test -z $module
	echo 'need module name' > /dev/stderr ^&1
	exit 1
end
set dir $PWD
while true
	if test $dir = '/'
		echo 'can\'t find package.json' > /dev/stderr ^&1
		exit 1
	end
	if test -f $dir/package.json
		break
	end
	set dir (dirname $dir)
end
# parse package.json
set name (json -f $dir/package.json browser | json $module)
if test (count $name) -ne 0
	set module $name
end
set folder $dir/node_modules/$module
if not test -d $folder
	echo "$module not found" > /dev/stderr ^&1
	exit 1
end
if not test -f $folder/package.json
	echo "package.json of $module not found" > /dev/stderr ^&1
	exit 1
end
echo -n $folder

竟然有一段是fish脚本，如果不想装 fish，用别的方式实现也很容易

之所以没有纯粹用 vim 写，一个原因是 vimscript 不熟练，另外独立的脚本也可在 shell 下使用

嗯嗯。没有人会用 vimscript 写的，那个渣渣语言。

不过用 js 写也是蛋疼，js 的库太基础，很多基础点的需求都需要自己写函数。

感觉用 python 写是兼容性最好而且最方便的，也是业界最认可的方式。

补充一下：python 的很多自带库函数，拿来就能用，js 写小脚本特别不方便。你有这种感觉吗？