fix: args forwards compatibility

src/commands/readme.ts

@@ -7,6 +7,7 @@ import {URL} from 'url'
 
 import {castArray, compact, sortBy, template, uniqBy} from '../util'
 import {HelpCompatibilityWrapper} from '../help-compatibility'
+import {ArgInput} from '@oclif/core/lib/interfaces'
 
 const normalize = require('normalize-package-data')
 const columns = Number.parseInt(process.env.COLUMNS!, 10) || 120
@@ -254,11 +255,13 @@ USAGE
  return `[${name}]`
  }
 
+ // v2 commands have args as an object, so we need to normalize it to an array for forwards compatibility
+ const normalized = (Array.isArray(command.args) ? command.args ?? [] : Object.values(command.args ?? {})) as ArgInput
  const id = toConfiguredId(command.id, config)
  const defaultUsage = () => {
  return compact([
  id,
- command.args.filter(a => !a.hidden).map(a => arg(a)).join(' '),
+ normalized.filter(a => !a.hidden).map(a => arg(a)).join(' '),
  ]).join(' ')
  }