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							- const { chalk } = require('@vue/cli-shared-utils')
 
- const getPadLength = require('../util/getPadLength')
 
- module.exports = (api, options) => {
 
-   api.registerCommand('help', args => {
 
-     const commandName = args._[0]
 
-     if (!commandName) {
 
-       logMainHelp()
 
-     } else {
 
-       logHelpForCommand(commandName, api.service.commands[commandName])
 
-     }
 
-   })
 
-   function logMainHelp () {
 
-     console.log(
 
-       `\n  Usage: vue-cli-service <command> [options]\n` +
 
-       `\n  Commands:\n`
 
-     )
 
-     const commands = api.service.commands
 
-     const padLength = getPadLength(commands)
 
-     for (const name in commands) {
 
-       if (name !== 'help') {
 
-         const opts = commands[name].opts || {}
 
-         console.log(`    ${
 
-           chalk.blue(name.padEnd(padLength))
 
-         }${
 
-           opts.description || ''
 
-         }`)
 
-       }
 
-     }
 
-     console.log(`\n  run ${
 
-       chalk.green(`vue-cli-service help [command]`)
 
-     } for usage of a specific command.\n`)
 
-   }
 
-   function logHelpForCommand (name, command) {
 
-     if (!command) {
 
-       console.log(chalk.red(`\n  command "${name}" does not exist.`))
 
-     } else {
 
-       const opts = command.opts || {}
 
-       if (opts.usage) {
 
-         console.log(`\n  Usage: ${opts.usage}`)
 
-       }
 
-       if (opts.options) {
 
-         console.log(`\n  Options:\n`)
 
-         const padLength = getPadLength(opts.options)
 
-         for (const [flags, description] of Object.entries(opts.options)) {
 
-           console.log(`    ${
 
-             chalk.blue(flags.padEnd(padLength))
 
-           }${
 
-             description
 
-           }`)
 
-         }
 
-       }
 
-       if (opts.details) {
 
-         console.log()
 
-         console.log(opts.details.split('\n').map(line => `  ${line}`).join('\n'))
 
-       }
 
-       console.log()
 
-     }
 
-   }
 
- }
 
 
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