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const spawn = require('@npmcli/promise-spawn')
const path = require('node:path')
const { openUrl } = require('../utils/open-url.js')
const { glob } = require('glob')
const { output, input } = require('proc-log')
const localeCompare = require('@isaacs/string-locale-compare')('en')
const { deref } = require('../utils/cmd-list.js')
const BaseCommand = require('../base-cmd.js')
const globify = pattern => pattern.split('\\').join('/')
// Strips out the number from foo.7 or foo.7. or foo.7.tgz
// We don't currently compress our man pages but if we ever did this would
// seamlessly continue supporting it
const manNumberRegex = /\.(\d+)(\.[^/\\]*)?$/
// hardcoded names for mansections
// XXX: these are used in the docs workspace and should be exported
// from npm so section names can changed more easily
const manSectionNames = {
1: 'commands',
5: 'configuring-npm',
7: 'using-npm',
}
class Help extends BaseCommand {
static description = 'Get help on npm'
static name = 'help'
static usage = ['<term> [<terms..>]']
static params = ['viewer']
static async completion (opts, npm) {
if (opts.conf.argv.remain.length > 2) {
return []
}
const g = path.resolve(npm.npmRoot, 'man/man[0-9]/*.[0-9]')
let files = await glob(globify(g))
// preserve glob@8 behavior
files = files.sort((a, b) => a.localeCompare(b, 'en'))
return Object.keys(files.reduce(function (acc, file) {
file = path.basename(file).replace(/\.[0-9]+$/, '')
file = file.replace(/^npm-/, '')
acc[file] = true
return acc
}, { help: true }))
}
async exec (args) {
// By default we search all of our man subdirectories, but if the user has
// asked for a specific one we limit the search to just there
const manSearch = /^\d+$/.test(args[0]) ? `man${args.shift()}` : 'man*'
if (!args.length) {
return output.standard(this.npm.usage)
}
// npm help foo bar baz: search topics
if (args.length > 1) {
return this.helpSearch(args)
}
// `npm help package.json`
const arg = (deref(args[0]) || args[0]).replace('.json', '-json')
// find either section.n or npm-section.n
const f = globify(path.resolve(this.npm.npmRoot, `man/${manSearch}/?(npm-)${arg}.[0-9]*`))
const [man] = await glob(f).then(r => r.sort((a, b) => {
// Because the glob is (subtly) different from manNumberRegex,
// we can't rely on it passing.
const aManNumberMatch = a.match(manNumberRegex)?.[1] || 999
const bManNumberMatch = b.match(manNumberRegex)?.[1] || 999
if (aManNumberMatch !== bManNumberMatch) {
return aManNumberMatch - bManNumberMatch
}
return localeCompare(a, b)
}))
return man ? this.viewMan(man) : this.helpSearch(args)
}
helpSearch (args) {
return this.npm.exec('help-search', args)
}
async viewMan (man) {
const viewer = this.npm.config.get('viewer')
if (viewer === 'browser') {
return openUrl(this.npm, this.htmlMan(man), 'help available at the following URL', true)
}
let args = ['man', [man]]
if (viewer === 'woman') {
args = ['emacsclient', ['-e', `(woman-find-file '${man}')`]]
}
try {
await input.start(() => spawn(...args, { stdio: 'inherit' }))
} catch (err) {
if (err.code) {
throw new Error(`help process exited with code: ${err.code}`)
} else {
throw err
}
}
}
// Returns the path to the html version of the man page
htmlMan (man) {
const sect = manSectionNames[man.match(manNumberRegex)[1]]
const f = path.basename(man).replace(manNumberRegex, '')
return 'file:///' + path.resolve(this.npm.npmRoot, `docs/output/${sect}/${f}.html`)
}
}
module.exports = Help