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Mini Shell
const { commands } = require('./cmd-list')
const COL_MAX = 60
const COL_MIN = 24
const COL_GUTTER = 16
const INDENT = 4
const indent = (repeat = INDENT) => ' '.repeat(repeat)
const indentNewline = (repeat) => `\n${indent(repeat)}`
module.exports = (npm) => {
const browser = npm.config.get('viewer') === 'browser' ? ' (in a browser)' : ''
const allCommands = npm.config.get('long') ? cmdUsages(npm.constructor) : cmdNames()
return `npm <command>
Usage:
npm install install all the dependencies in your project
npm install <foo> add the <foo> dependency to your project
npm test run this project's tests
npm run <foo> run the script named <foo>
npm <command> -h quick help on <command>
npm -l display usage info for all commands
npm help <term> search for help on <term>${browser}
npm help npm more involved overview${browser}
All commands:
${allCommands}
Specify configs in the ini-formatted file:
${indent() + npm.config.get('userconfig')}
or on the command line via: npm <command> --key=value
More configuration info: npm help config
Configuration fields: npm help 7 config
npm@${npm.version} ${npm.npmRoot}`
}
const cmdNames = () => {
const out = ['']
const line = !process.stdout.columns ? COL_MAX
: Math.min(COL_MAX, Math.max(process.stdout.columns - COL_GUTTER, COL_MIN))
let l = 0
for (const c of commands) {
if (out[l].length + c.length + 2 < line) {
out[l] += ', ' + c
} else {
out[l++] += ','
out[l] = c
}
}
return indentNewline() + out.join(indentNewline()).slice(2)
}
const cmdUsages = (Npm) => {
// return a string of <command>: <usage>
let maxLen = 0
const set = []
for (const c of commands) {
set.push([c, Npm.cmd(c).describeUsage.split('\n')])
maxLen = Math.max(maxLen, c.length)
}
return set.map(([name, usageLines]) => {
const gutter = indent(maxLen - name.length + 1)
const usage = usageLines.join(indentNewline(INDENT + maxLen + 1))
return indentNewline() + name + gutter + usage
}).join('\n')
}
Zerion Mini Shell 1.0