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module.exports = help
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help.completion = function (opts, cb) {
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if (opts.conf.argv.remain.length > 2) return cb(null, [])
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var num = 1
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if (-1 !== opts.conf.argv.remain[1].indexOf("api")) num = 3
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getSections(num, cb)
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}
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var fs = require("graceful-fs")
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, path = require("path")
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, exec = require("./utils/exec.js")
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, npm = require("./npm.js")
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, output = require("./utils/output.js")
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, log = require("npmlog")
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function help (args, cb) {
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var num = 1
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, argv = npm.config.get("argv").cooked
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if (argv.length && -1 !== argv[0].indexOf("api")) {
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num = 3
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}
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if (args.length > 1 && args[0]) {
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return npm.commands["help-search"](args, num, cb)
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}
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var section = npm.deref(args[0]) || args[0]
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if (section) {
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if ( npm.config.get("usage")
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&& npm.commands[section]
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&& npm.commands[section].usage
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) {
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npm.config.set("loglevel", "silent")
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log.level = "silent"
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return output.write(npm.commands[section].usage, cb)
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}
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var sectionPath = path.join( __dirname, "..", "man", "man" + num
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, section + "." + num)
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, htmlPath = path.resolve( __dirname, "..", "html"
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, num === 3 ? "api" : "doc"
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, section+".html" )
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return fs.stat
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( sectionPath
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, function (e, o) {
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if (e) return npm.commands["help-search"](args, cb)
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var manpath = path.join(__dirname, "..", "man")
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, env = {}
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Object.keys(process.env).forEach(function (i) {
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env[i] = process.env[i]
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})
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env.MANPATH = manpath
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var viewer = npm.config.get("viewer")
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switch (viewer) {
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case "woman":
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var a = ["-e", "(woman-find-file \"" + sectionPath + "\")"]
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exec("emacsclient", a, env, true, cb)
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break
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case "browser":
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var b = npm.config.get("browser")
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if (!b) {
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return cb(new Error("viewer=browser and no browser set."))
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}
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output.write("Opening HTML in default browser...", cb)
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// windows is SO weird.
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if (process.platform === "win32") {
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exec("cmd", ["/c", htmlPath], env, false, function () {})
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} else {
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exec(b, [htmlPath], env, false, function () {})
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}
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break
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default:
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exec("man", [num, section], env, true, cb)
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}
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}
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)
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} else getSections(function (er, sections) {
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if (er) return cb(er)
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npm.config.set("loglevel", "silent")
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log.level = "silent"
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output.write
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( ["\nUsage: npm <command>"
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, ""
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, "where <command> is one of:"
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, npm.config.get("long") ? usages()
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: " " + wrap(Object.keys(npm.commands))
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, ""
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, "npm <cmd> -h quick help on <cmd>"
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, "npm -l display full usage info"
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, "npm faq commonly asked questions"
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, "npm help <term> search for help on <term>"
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, "npm help npm involved overview"
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, ""
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, "Specify configs in the ini-formatted file:"
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|
|
, " " + npm.config.get("userconfig")
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, "or on the command line via: npm <command> --key value"
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, "Config info can be viewed via: npm help config"
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, ""
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, "npm@" + npm.version + " " + path.dirname(__dirname)
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|
].join("\n"), function () { cb(er) })
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})
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}
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function usages () {
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// return a string of <cmd>: <usage>
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|
|
var maxLen = 0
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|
|
return Object.keys(npm.commands).filter(function (c) {
|
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|
|
return c === npm.deref(c)
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|
|
}).reduce(function (set, c) {
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|
set.push([c, npm.commands[c].usage || ""])
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|
maxLen = Math.max(maxLen, c.length)
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|
return set
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|
}, []).map(function (item) {
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|
var c = item[0]
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|
, usage = item[1]
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|
return "\n " + c + (new Array(maxLen - c.length + 2).join(" "))
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|
|
+ (usage.split("\n")
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|
|
.join("\n" + (new Array(maxLen + 6).join(" "))))
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|
|
}).join("\n")
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|
|
return out
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
function wrap (arr) {
|
|
|
|
var out = ['']
|
|
|
|
, l = 0
|
|
|
|
arr.sort(function (a,b) { return a<b?-1:1 })
|
|
|
|
.forEach(function (c) {
|
|
|
|
if (out[l].length + c.length + 2 < 60) {
|
|
|
|
out[l] += ', '+c
|
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|
|
} else {
|
|
|
|
out[l++] += ','
|
|
|
|
out[l] = c
|
|
|
|
}
|
|
|
|
})
|
|
|
|
return out.join("\n ").substr(2)
|
|
|
|
}
|
|
|
|
|
|
|
|
function getSections (num, cb) {
|
|
|
|
if (typeof cb !== "function") cb = num, num = 1
|
|
|
|
|
|
|
|
var mp = path.join(__dirname, "../man/man" + num + "/")
|
|
|
|
, cleaner = new RegExp("\\." + num + "$")
|
|
|
|
fs.readdir(mp, function (er, files) {
|
|
|
|
if (er) return cb(er)
|
|
|
|
var sectionList = files.concat("help." + num)
|
|
|
|
.filter(function (s) { return s.match(cleaner) })
|
|
|
|
.map(function (s) { return s.replace(cleaner, "")})
|
|
|
|
cb(null, sectionList)
|
|
|
|
})
|
|
|
|
}
|