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module.exports = help
help.completion = function (opts, cb) {
if (opts.conf.argv.remain.length > 2)
return cb(null, [])
getSections(cb)
}
const npmUsage = require('./utils/npm-usage.js')
const { spawn } = require('child_process')
const path = require('path')
const npm = require('./npm.js')
const log = require('npmlog')
const openUrl = require('./utils/open-url')
const glob = require('glob')
const output = require('./utils/output.js')
const usage = require('./utils/usage.js')
help.usage = usage('help', 'npm help <term> [<terms..>]')
function help (args, cb) {
const argv = npm.config.parsedArgv.cooked
let argnum = 0
if (args.length === 2 && ~~args[0])
argnum = ~~args.shift()
// npm help foo bar baz: search topics
if (args.length > 1 && args[0])
return npm.commands['help-search'](args, cb)
const affordances = {
'find-dupes': 'dedupe',
}
let section = affordances[args[0]] || npm.deref(args[0]) || args[0]
// npm help <noargs>: show basic usage
if (!section) {
npmUsage(argv[0] === 'help')
return cb()
}
// npm <command> -h: show command usage
if (npm.config.get('usage') &&
npm.commands[section] &&
npm.commands[section].usage) {
npm.config.set('loglevel', 'silent')
log.level = 'silent'
output(npm.commands[section].usage)
return cb()
}
let pref = [1, 5, 7]
if (argnum)
pref = [argnum].concat(pref.filter(n => n !== argnum))
// npm help <section>: Try to find the path
const manroot = path.resolve(__dirname, '..', 'man')
// legacy
if (section === 'global')
section = 'folders'
else if (section.match(/.*json/))
section = section.replace('.json', '-json')
// find either /section.n or /npm-section.n
// The glob is used in the glob. The regexp is used much
// further down. Globs and regexps are different
const compextglob = '.+(gz|bz2|lzma|[FYzZ]|xz)'
const compextre = '\\.(gz|bz2|lzma|[FYzZ]|xz)$'
const f = '+(npm-' + section + '|' + section + ').[0-9]?(' + compextglob + ')'
return glob(manroot + '/*/' + f, (er, mans) => {
if (er)
return cb(er)
if (!mans.length)
return npm.commands['help-search'](args, cb)
mans = mans.map((man) => {
const ext = path.extname(man)
if (man.match(new RegExp(compextre)))
man = path.basename(man, ext)
return man
})
viewMan(pickMan(mans, pref), cb)
})
}
function pickMan (mans, pref_) {
const nre = /([0-9]+)$/
const pref = {}
pref_.forEach((sect, i) => pref[sect] = i)
mans = mans.sort((a, b) => {
const an = a.match(nre)[1]
const bn = b.match(nre)[1]
return an === bn ? (a > b ? -1 : 1)
: pref[an] < pref[bn] ? -1
: 1
})
return mans[0]
}
function viewMan (man, cb) {
const nre = /([0-9]+)$/
const num = man.match(nre)[1]
const section = path.basename(man, '.' + num)
// at this point, we know that the specified man page exists
const manpath = path.join(__dirname, '..', 'man')
const env = {}
Object.keys(process.env).forEach(function (i) {
env[i] = process.env[i]
})
env.MANPATH = manpath
const viewer = npm.config.get('viewer')
const opts = {
env,
stdio: 'inherit',
}
let bin = 'man'
const args = []
switch (viewer) {
case 'woman':
bin = 'emacsclient'
args.push('-e', `(woman-find-file '${man}')`)
break
case 'browser':
bin = false
try {
const url = htmlMan(man)
openUrl(url, 'help available at the following URL', cb)
} catch (err) {
return cb(err)
}
break
default:
args.push(num, section)
break
}
if (bin) {
const proc = spawn(bin, args, opts)
proc.on('exit', (code) => {
if (code)
return cb(new Error(`help process exited with code: ${code}`))
return cb()
})
}
}
function htmlMan (man) {
let sect = +man.match(/([0-9]+)$/)[1]
const f = path.basename(man).replace(/[.]([0-9]+)$/, '')
switch (sect) {
case 1:
sect = 'commands'
break
case 5:
sect = 'configuring-npm'
break
case 7:
sect = 'using-npm'
break
default:
throw new Error('invalid man section: ' + sect)
}
return 'file://' + path.resolve(__dirname, '..', 'docs', 'output', sect, f + '.html')
}
function getSections (cb) {
const g = path.resolve(__dirname, '../man/man[0-9]/*.[0-9]')
glob(g, function (er, files) {
if (er)
return cb(er)
cb(null, Object.keys(files.reduce(function (acc, file) {
file = path.basename(file).replace(/\.[0-9]+$/, '')
file = file.replace(/^npm-/, '')
acc[file] = true
return acc
}, { help: true })))
})
}
|
