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76 lines
2.0 KiB
Plaintext
76 lines
2.0 KiB
Plaintext
import { defaultFlags } from './flags.js';
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import {
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getHelpListMaxNamePadding,
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formatGroupedFlagList,
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formatGroupedHelpList,
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} from './format-lists.js';
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/**
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* @param {string} name
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* @param {Readonly<import('./help-list-types.js').HelpMessageInfo>} info
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* @returns {string}
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*/
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export function formatHelpMessage (name, info = {}) {
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const {
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aliases = {},
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commands = {},
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examples = [],
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flags = {},
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indent = 2,
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noDefaultFlags = false,
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usage = '',
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} = info;
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const aliasesWithGroups = Object.fromEntries(
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Object.entries(aliases).map(
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([key, { listGroup, ...value }]) => [key, {
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listGroup: (listGroup ? listGroup + ' ' : '') + 'Aliases',
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...value,
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}]
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)
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);
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const commandList = { ...aliasesWithGroups, ...commands };
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const flagList = { ...flags, ...(noDefaultFlags ? {} : defaultFlags) };
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const padName = Math.max(
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getHelpListMaxNamePadding(commandList),
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getHelpListMaxNamePadding(flagList, { keyPrefix: '--' })
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);
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/** @type {import('./format-lists.js').HelpListGroupOptions} */
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const listOptions = { fixedPadName: true, padName };
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return (
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''.padEnd(indent) + 'Usage\n' +
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''.padEnd(indent + 2) + `$ ${name} ${usage}\n` +
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formatGroupedHelpList(commandList, indent, { defaultGroupName: 'Commands', defaultGroupOrderFirst: true, ...listOptions }) +
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formatGroupedFlagList(flagList, indent, listOptions) +
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(
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examples.length
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? '\n' + ''.padEnd(indent) + ['Examples', ...formatExamples(name, examples)].join('\n' + ''.padEnd(indent + 2))
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: ''
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)
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);
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}
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/**
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* @param {string} name
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* @param {NonNullable<import('./help-list-types.js').HelpMessageInfo["examples"]>} examples
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* @returns {string[]}
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*/
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function formatExamples (name, examples) {
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/** @type {string[]} */
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const result = [];
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for (const item of examples) {
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if (typeof item === 'string') {
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result.push(`$ ${name} ${item}`);
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} else {
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result.push(`$ ${item.prefix ? item.prefix + ' ' : ''}${name} ${item.suffix || ''}`);
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}
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}
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return result;
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}
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