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713 lines
25 KiB
JavaScript
713 lines
25 KiB
JavaScript
8 months ago
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import { inspect } from 'node:util';
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import { parseArgs } from './parse-args.js';
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// it's a tiny API, just cast it inline, it's fine
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//@ts-ignore
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import cliui from '@isaacs/cliui';
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import { basename } from 'node:path';
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const width = Math.min((process && process.stdout && process.stdout.columns) || 80, 80);
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// indentation spaces from heading level
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const indent = (n) => (n - 1) * 2;
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const toEnvKey = (pref, key) => {
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return [pref, key.replace(/[^a-zA-Z0-9]+/g, ' ')]
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.join(' ')
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.trim()
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.toUpperCase()
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.replace(/ /g, '_');
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};
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const toEnvVal = (value, delim = '\n') => {
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const str = typeof value === 'string'
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? value
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: typeof value === 'boolean'
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? value
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? '1'
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: '0'
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: typeof value === 'number'
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? String(value)
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: Array.isArray(value)
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? value
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.map((v) => toEnvVal(v))
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.join(delim)
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: /* c8 ignore start */
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undefined;
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if (typeof str !== 'string') {
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throw new Error(`could not serialize value to environment: ${JSON.stringify(value)}`);
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}
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/* c8 ignore stop */
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return str;
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};
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const fromEnvVal = (env, type, multiple, delim = '\n') => (multiple
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? env.split(delim).map(v => fromEnvVal(v, type, false))
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: type === 'string'
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? env
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: type === 'boolean'
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? env === '1'
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: +env.trim());
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export const isConfigType = (t) => typeof t === 'string' &&
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(t === 'string' || t === 'number' || t === 'boolean');
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const undefOrType = (v, t) => v === undefined || typeof v === t;
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// print the value type, for error message reporting
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const valueType = (v) => typeof v === 'string'
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? 'string'
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: typeof v === 'boolean'
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? 'boolean'
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: typeof v === 'number'
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? 'number'
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: Array.isArray(v)
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? joinTypes([...new Set(v.map(v => valueType(v)))]) + '[]'
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: `${v.type}${v.multiple ? '[]' : ''}`;
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const joinTypes = (types) => types.length === 1 ? types[0] : `(${types.join('|')})`;
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const isValidValue = (v, type, multi) => {
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if (multi) {
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if (!Array.isArray(v))
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return false;
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return !v.some((v) => !isValidValue(v, type, false));
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}
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if (Array.isArray(v))
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return false;
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return typeof v === type;
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};
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export const isConfigOption = (o, type, multi) => !!o &&
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typeof o === 'object' &&
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isConfigType(o.type) &&
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o.type === type &&
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undefOrType(o.short, 'string') &&
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undefOrType(o.description, 'string') &&
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undefOrType(o.hint, 'string') &&
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undefOrType(o.validate, 'function') &&
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(o.default === undefined || isValidValue(o.default, type, multi)) &&
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!!o.multiple === multi;
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function num(o = {}) {
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const { default: def, validate: val, ...rest } = o;
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if (def !== undefined && !isValidValue(def, 'number', false)) {
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throw new TypeError('invalid default value');
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}
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const validate = val
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? val
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: undefined;
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return {
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...rest,
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default: def,
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validate,
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type: 'number',
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multiple: false,
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};
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}
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function numList(o = {}) {
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const { default: def, validate: val, ...rest } = o;
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if (def !== undefined && !isValidValue(def, 'number', true)) {
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throw new TypeError('invalid default value');
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}
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const validate = val
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? val
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: undefined;
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return {
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...rest,
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default: def,
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validate,
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type: 'number',
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multiple: true,
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};
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}
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function opt(o = {}) {
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const { default: def, validate: val, ...rest } = o;
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if (def !== undefined && !isValidValue(def, 'string', false)) {
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throw new TypeError('invalid default value');
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}
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const validate = val
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? val
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: undefined;
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return {
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...rest,
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default: def,
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validate,
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type: 'string',
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multiple: false,
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};
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}
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function optList(o = {}) {
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const { default: def, validate: val, ...rest } = o;
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if (def !== undefined && !isValidValue(def, 'string', true)) {
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throw new TypeError('invalid default value');
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}
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const validate = val
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? val
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: undefined;
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return {
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...rest,
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default: def,
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validate,
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type: 'string',
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multiple: true,
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};
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}
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function flag(o = {}) {
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const { hint, default: def, validate: val, ...rest } = o;
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if (def !== undefined && !isValidValue(def, 'boolean', false)) {
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throw new TypeError('invalid default value');
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}
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const validate = val
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? val
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: undefined;
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if (hint !== undefined) {
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throw new TypeError('cannot provide hint for flag');
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}
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return {
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...rest,
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default: def,
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validate,
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type: 'boolean',
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multiple: false,
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};
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}
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function flagList(o = {}) {
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const { hint, default: def, validate: val, ...rest } = o;
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if (def !== undefined && !isValidValue(def, 'boolean', true)) {
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throw new TypeError('invalid default value');
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}
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const validate = val
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? val
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: undefined;
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if (hint !== undefined) {
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throw new TypeError('cannot provide hint for flag list');
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}
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return {
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...rest,
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default: def,
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validate,
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type: 'boolean',
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multiple: true,
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};
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}
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const toParseArgsOptionsConfig = (options) => {
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const c = {};
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for (const longOption in options) {
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const config = options[longOption];
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if (isConfigOption(config, 'number', true)) {
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c[longOption] = {
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type: 'string',
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multiple: true,
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default: config.default?.map(c => String(c)),
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};
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}
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else if (isConfigOption(config, 'number', false)) {
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c[longOption] = {
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type: 'string',
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multiple: false,
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default: config.default === undefined
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? undefined
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: String(config.default),
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};
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}
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else {
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const conf = config;
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c[longOption] = {
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type: conf.type,
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multiple: conf.multiple,
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default: conf.default,
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};
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}
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if (typeof config.short === 'string') {
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c[longOption].short = config.short;
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}
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if (config.type === 'boolean' &&
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!longOption.startsWith('no-') &&
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!options[`no-${longOption}`]) {
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c[`no-${longOption}`] = {
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type: 'boolean',
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multiple: config.multiple,
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};
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}
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}
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return c;
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};
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const isHeading = (r) => r.type === 'heading';
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const isDescription = (r) => r.type === 'description';
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/**
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* Class returned by the {@link jack} function and all configuration
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* definition methods. This is what gets chained together.
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*/
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export class Jack {
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#configSet;
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#shorts;
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#options;
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#fields = [];
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#env;
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#envPrefix;
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#allowPositionals;
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#usage;
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constructor(options = {}) {
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this.#options = options;
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this.#allowPositionals = options.allowPositionals !== false;
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this.#env =
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this.#options.env === undefined ? process.env : this.#options.env;
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this.#envPrefix = options.envPrefix;
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// We need to fib a little, because it's always the same object, but it
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// starts out as having an empty config set. Then each method that adds
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// fields returns `this as Jack<C & { ...newConfigs }>`
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this.#configSet = Object.create(null);
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this.#shorts = Object.create(null);
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}
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/**
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* Set the default value (which will still be overridden by env or cli)
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* as if from a parsed config file. The optional `source` param, if
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* provided, will be included in error messages if a value is invalid or
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* unknown.
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*/
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setConfigValues(values, source = '') {
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try {
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this.validate(values);
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}
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catch (er) {
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throw Object.assign(er, source ? { source } : {});
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}
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for (const [field, value] of Object.entries(values)) {
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const my = this.#configSet[field];
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my.default = value;
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}
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return this;
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}
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/**
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* Parse a string of arguments, and return the resulting
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* `{ values, positionals }` object.
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*
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* If an {@link JackOptions#envPrefix} is set, then it will read default
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* values from the environment, and write the resulting values back
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* to the environment as well.
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*
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* Environment values always take precedence over any other value, except
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* an explicit CLI setting.
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*/
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parse(args = process.argv) {
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if (args === process.argv) {
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args = args.slice(process._eval !== undefined ? 1 : 2);
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}
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if (this.#envPrefix) {
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for (const [field, my] of Object.entries(this.#configSet)) {
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const ek = toEnvKey(this.#envPrefix, field);
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const env = this.#env[ek];
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if (env !== undefined) {
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my.default = fromEnvVal(env, my.type, !!my.multiple, my.delim);
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}
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}
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}
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const options = toParseArgsOptionsConfig(this.#configSet);
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const result = parseArgs({
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args,
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options,
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// always strict, but using our own logic
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strict: false,
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allowPositionals: this.#allowPositionals,
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tokens: true,
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});
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const p = {
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values: {},
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positionals: [],
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};
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for (const token of result.tokens) {
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if (token.kind === 'positional') {
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p.positionals.push(token.value);
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if (this.#options.stopAtPositional) {
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p.positionals.push(...args.slice(token.index + 1));
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return p;
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}
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}
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else if (token.kind === 'option') {
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let value = undefined;
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if (token.name.startsWith('no-')) {
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const my = this.#configSet[token.name];
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const pname = token.name.substring('no-'.length);
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const pos = this.#configSet[pname];
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if (pos &&
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pos.type === 'boolean' &&
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(!my ||
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(my.type === 'boolean' && !!my.multiple === !!pos.multiple))) {
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value = false;
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token.name = pname;
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}
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}
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const my = this.#configSet[token.name];
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if (!my) {
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throw new Error(`Unknown option '${token.rawName}'. ` +
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|
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`To specify a positional argument starting with a '-', ` +
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`place it at the end of the command after '--', as in ` +
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`'-- ${token.rawName}'`);
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}
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if (value === undefined) {
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|
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if (token.value === undefined) {
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if (my.type !== 'boolean') {
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throw new Error(`No value provided for ${token.rawName}, expected ${my.type}`);
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}
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value = true;
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}
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else {
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if (my.type === 'boolean') {
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throw new Error(`Flag ${token.rawName} does not take a value, received '${token.value}'`);
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}
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if (my.type === 'string') {
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value = token.value;
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}
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else {
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value = +token.value;
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|
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if (value !== value) {
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throw new Error(`Invalid value '${token.value}' provided for ` +
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`'${token.rawName}' option, expected number`);
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}
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}
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}
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}
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|
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if (my.multiple) {
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const pv = p.values;
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pv[token.name] = pv[token.name] ?? [];
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pv[token.name].push(value);
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}
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else {
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const pv = p.values;
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pv[token.name] = value;
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}
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}
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}
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for (const [field, c] of Object.entries(this.#configSet)) {
|
||
|
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if (c.default !== undefined && !(field in p.values)) {
|
||
|
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//@ts-ignore
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||
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p.values[field] = c.default;
|
||
|
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}
|
||
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}
|
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|
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for (const [field, value] of Object.entries(p.values)) {
|
||
|
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const valid = this.#configSet[field].validate;
|
||
|
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if (valid && !valid(value)) {
|
||
|
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throw new Error(`Invalid value provided for --${field}: ${JSON.stringify(value)}`);
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||
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}
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}
|
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|
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this.#writeEnv(p);
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||
|
|
return p;
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Validate that any arbitrary object is a valid configuration `values`
|
||
|
|
* object. Useful when loading config files or other sources.
|
||
|
|
*/
|
||
|
|
validate(o) {
|
||
|
|
if (!o || typeof o !== 'object') {
|
||
|
|
throw new Error('Invalid config: not an object');
|
||
|
|
}
|
||
|
|
for (const field in o) {
|
||
|
|
const config = this.#configSet[field];
|
||
|
|
if (!config) {
|
||
|
|
throw new Error(`Unknown config option: ${field}`);
|
||
|
|
}
|
||
|
|
if (!isValidValue(o[field], config.type, !!config.multiple)) {
|
||
|
|
throw Object.assign(new Error(`Invalid value ${valueType(o[field])} for ${field}, expected ${valueType(config)}`), {
|
||
|
|
field,
|
||
|
|
value: o[field],
|
||
|
|
});
|
||
|
|
}
|
||
|
|
if (config.validate && !config.validate(o[field])) {
|
||
|
|
throw new Error(`Invalid config value for ${field}: ${o[field]}`);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#writeEnv(p) {
|
||
|
|
if (!this.#env || !this.#envPrefix)
|
||
|
|
return;
|
||
|
|
for (const [field, value] of Object.entries(p.values)) {
|
||
|
|
const my = this.#configSet[field];
|
||
|
|
this.#env[toEnvKey(this.#envPrefix, field)] = toEnvVal(value, my.delim);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Add a heading to the usage output banner
|
||
|
|
*/
|
||
|
|
heading(text, level) {
|
||
|
|
if (level === undefined) {
|
||
|
|
level = this.#fields.some(r => isHeading(r)) ? 2 : 1;
|
||
|
|
}
|
||
|
|
this.#fields.push({ type: 'heading', text, level });
|
||
|
|
return this;
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Add a long-form description to the usage output at this position.
|
||
|
|
*/
|
||
|
|
description(text, { pre } = {}) {
|
||
|
|
this.#fields.push({ type: 'description', text, pre });
|
||
|
|
return this;
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Add one or more number fields.
|
||
|
|
*/
|
||
|
|
num(fields) {
|
||
|
|
return this.#addFields(fields, num);
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Add one or more multiple number fields.
|
||
|
|
*/
|
||
|
|
numList(fields) {
|
||
|
|
return this.#addFields(fields, numList);
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Add one or more string option fields.
|
||
|
|
*/
|
||
|
|
opt(fields) {
|
||
|
|
return this.#addFields(fields, opt);
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Add one or more multiple string option fields.
|
||
|
|
*/
|
||
|
|
optList(fields) {
|
||
|
|
return this.#addFields(fields, optList);
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Add one or more flag fields.
|
||
|
|
*/
|
||
|
|
flag(fields) {
|
||
|
|
return this.#addFields(fields, flag);
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Add one or more multiple flag fields.
|
||
|
|
*/
|
||
|
|
flagList(fields) {
|
||
|
|
return this.#addFields(fields, flagList);
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Generic field definition method. Similar to flag/flagList/number/etc,
|
||
|
|
* but you must specify the `type` (and optionally `multiple` and `delim`)
|
||
|
|
* fields on each one, or Jack won't know how to define them.
|
||
|
|
*/
|
||
|
|
addFields(fields) {
|
||
|
|
const next = this;
|
||
|
|
for (const [name, field] of Object.entries(fields)) {
|
||
|
|
this.#validateName(name, field);
|
||
|
|
next.#fields.push({
|
||
|
|
type: 'config',
|
||
|
|
name,
|
||
|
|
value: field,
|
||
|
|
});
|
||
|
|
}
|
||
|
|
Object.assign(next.#configSet, fields);
|
||
|
|
return next;
|
||
|
|
}
|
||
|
|
#addFields(fields, fn) {
|
||
|
|
const next = this;
|
||
|
|
Object.assign(next.#configSet, Object.fromEntries(Object.entries(fields).map(([name, field]) => {
|
||
|
|
this.#validateName(name, field);
|
||
|
|
const option = fn(field);
|
||
|
|
next.#fields.push({
|
||
|
|
type: 'config',
|
||
|
|
name,
|
||
|
|
value: option,
|
||
|
|
});
|
||
|
|
return [name, option];
|
||
|
|
})));
|
||
|
|
return next;
|
||
|
|
}
|
||
|
|
#validateName(name, field) {
|
||
|
|
if (!/^[a-zA-Z0-9]([a-zA-Z0-9-]*[a-zA-Z0-9])?$/.test(name)) {
|
||
|
|
throw new TypeError(`Invalid option name: ${name}, ` +
|
||
|
|
`must be '-' delimited ASCII alphanumeric`);
|
||
|
|
}
|
||
|
|
if (this.#configSet[name]) {
|
||
|
|
throw new TypeError(`Cannot redefine option ${field}`);
|
||
|
|
}
|
||
|
|
if (this.#shorts[name]) {
|
||
|
|
throw new TypeError(`Cannot redefine option ${name}, already ` +
|
||
|
|
`in use for ${this.#shorts[name]}`);
|
||
|
|
}
|
||
|
|
if (field.short) {
|
||
|
|
if (!/^[a-zA-Z0-9]$/.test(field.short)) {
|
||
|
|
throw new TypeError(`Invalid ${name} short option: ${field.short}, ` +
|
||
|
|
'must be 1 ASCII alphanumeric character');
|
||
|
|
}
|
||
|
|
if (this.#shorts[field.short]) {
|
||
|
|
throw new TypeError(`Invalid ${name} short option: ${field.short}, ` +
|
||
|
|
`already in use for ${this.#shorts[field.short]}`);
|
||
|
|
}
|
||
|
|
this.#shorts[field.short] = name;
|
||
|
|
this.#shorts[name] = name;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Return the usage banner for the given configuration
|
||
|
|
*/
|
||
|
|
usage() {
|
||
|
|
if (this.#usage)
|
||
|
|
return this.#usage;
|
||
|
|
let headingLevel = 1;
|
||
|
|
const ui = cliui({ width });
|
||
|
|
const first = this.#fields[0];
|
||
|
|
let start = first?.type === 'heading' ? 1 : 0;
|
||
|
|
if (first?.type === 'heading') {
|
||
|
|
ui.div({
|
||
|
|
padding: [0, 0, 0, 0],
|
||
|
|
text: normalize(first.text),
|
||
|
|
});
|
||
|
|
}
|
||
|
|
ui.div({ padding: [0, 0, 0, 0], text: 'Usage:' });
|
||
|
|
if (this.#options.usage) {
|
||
|
|
ui.div({
|
||
|
|
text: this.#options.usage,
|
||
|
|
padding: [0, 0, 0, 2],
|
||
|
|
});
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
const cmd = basename(process.argv[1]);
|
||
|
|
const shortFlags = [];
|
||
|
|
const shorts = [];
|
||
|
|
const flags = [];
|
||
|
|
const opts = [];
|
||
|
|
for (const [field, config] of Object.entries(this.#configSet)) {
|
||
|
|
if (config.short) {
|
||
|
|
if (config.type === 'boolean')
|
||
|
|
shortFlags.push(config.short);
|
||
|
|
else
|
||
|
|
shorts.push([config.short, config.hint || field]);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
if (config.type === 'boolean')
|
||
|
|
flags.push(field);
|
||
|
|
else
|
||
|
|
opts.push([field, config.hint || field]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
const sf = shortFlags.length ? ' -' + shortFlags.join('') : '';
|
||
|
|
const so = shorts.map(([k, v]) => ` --${k}=<${v}>`).join('');
|
||
|
|
const lf = flags.map(k => ` --${k}`).join('');
|
||
|
|
const lo = opts.map(([k, v]) => ` --${k}=<${v}>`).join('');
|
||
|
|
const usage = `${cmd}${sf}${so}${lf}${lo}`.trim();
|
||
|
|
ui.div({
|
||
|
|
text: usage,
|
||
|
|
padding: [0, 0, 0, 2],
|
||
|
|
});
|
||
|
|
}
|
||
|
|
ui.div({ padding: [0, 0, 0, 0], text: '' });
|
||
|
|
const maybeDesc = this.#fields[start];
|
||
|
|
if (isDescription(maybeDesc)) {
|
||
|
|
const print = normalize(maybeDesc.text, maybeDesc.pre);
|
||
|
|
start++;
|
||
|
|
ui.div({ padding: [0, 0, 0, 0], text: print });
|
||
|
|
ui.div({ padding: [0, 0, 0, 0], text: '' });
|
||
|
|
}
|
||
|
|
// turn each config type into a row, and figure out the width of the
|
||
|
|
// left hand indentation for the option descriptions.
|
||
|
|
let maxMax = Math.max(12, Math.min(26, Math.floor(width / 3)));
|
||
|
|
let maxWidth = 8;
|
||
|
|
let prev = undefined;
|
||
|
|
const rows = [];
|
||
|
|
for (const field of this.#fields.slice(start)) {
|
||
|
|
if (field.type !== 'config') {
|
||
|
|
if (prev?.type === 'config')
|
||
|
|
prev.skipLine = true;
|
||
|
|
prev = undefined;
|
||
|
|
field.text = normalize(field.text, !!field.pre);
|
||
|
|
rows.push(field);
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
const { value } = field;
|
||
|
|
const desc = value.description || '';
|
||
|
|
const mult = value.multiple ? 'Can be set multiple times' : '';
|
||
|
|
const dmDelim = mult && (desc.includes('\n') ? '\n\n' : '\n');
|
||
|
|
const text = normalize(desc + dmDelim + mult);
|
||
|
|
const hint = value.hint ||
|
||
|
|
(value.type === 'number'
|
||
|
|
? 'n'
|
||
|
|
: value.type === 'string'
|
||
|
|
? field.name
|
||
|
|
: undefined);
|
||
|
|
const short = !value.short
|
||
|
|
? ''
|
||
|
|
: value.type === 'boolean'
|
||
|
|
? `-${value.short} `
|
||
|
|
: `-${value.short}<${hint}> `;
|
||
|
|
const left = value.type === 'boolean'
|
||
|
|
? `${short}--${field.name}`
|
||
|
|
: `${short}--${field.name}=<${hint}>`;
|
||
|
|
const row = { text, left, type: 'config' };
|
||
|
|
if (text.length > width - maxMax) {
|
||
|
|
row.skipLine = true;
|
||
|
|
}
|
||
|
|
if (prev && left.length > maxMax)
|
||
|
|
prev.skipLine = true;
|
||
|
|
prev = row;
|
||
|
|
const len = left.length + 4;
|
||
|
|
if (len > maxWidth && len < maxMax) {
|
||
|
|
maxWidth = len;
|
||
|
|
}
|
||
|
|
rows.push(row);
|
||
|
|
}
|
||
|
|
// every heading/description after the first gets indented by 2
|
||
|
|
// extra spaces.
|
||
|
|
for (const row of rows) {
|
||
|
|
if (row.left) {
|
||
|
|
// If the row is too long, don't wrap it
|
||
|
|
// Bump the right-hand side down a line to make room
|
||
|
|
const configIndent = indent(Math.max(headingLevel, 2));
|
||
|
|
if (row.left.length > maxWidth - 2) {
|
||
|
|
ui.div({ text: row.left, padding: [0, 0, 0, configIndent] });
|
||
|
|
ui.div({ text: row.text, padding: [0, 0, 0, maxWidth] });
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
ui.div({
|
||
|
|
text: row.left,
|
||
|
|
padding: [0, 1, 0, configIndent],
|
||
|
|
width: maxWidth,
|
||
|
|
}, { padding: [0, 0, 0, 0], text: row.text });
|
||
|
|
}
|
||
|
|
if (row.skipLine) {
|
||
|
|
ui.div({ padding: [0, 0, 0, 0], text: '' });
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
if (isHeading(row)) {
|
||
|
|
const { level } = row;
|
||
|
|
headingLevel = level;
|
||
|
|
// only h1 and h2 have bottom padding
|
||
|
|
// h3-h6 do not
|
||
|
|
const b = level <= 2 ? 1 : 0;
|
||
|
|
ui.div({ ...row, padding: [0, 0, b, indent(level)] });
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
ui.div({ ...row, padding: [0, 0, 1, indent(headingLevel + 1)] });
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return (this.#usage = ui.toString());
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Return the configuration options as a plain object
|
||
|
|
*/
|
||
|
|
toJSON() {
|
||
|
|
return Object.fromEntries(Object.entries(this.#configSet).map(([field, def]) => [
|
||
|
|
field,
|
||
|
|
{
|
||
|
|
type: def.type,
|
||
|
|
...(def.multiple ? { multiple: true } : {}),
|
||
|
|
...(def.delim ? { delim: def.delim } : {}),
|
||
|
|
...(def.short ? { short: def.short } : {}),
|
||
|
|
...(def.description ? { description: def.description } : {}),
|
||
|
|
...(def.validate ? { validate: def.validate } : {}),
|
||
|
|
...(def.default !== undefined ? { default: def.default } : {}),
|
||
|
|
},
|
||
|
|
]));
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Custom printer for `util.inspect`
|
||
|
|
*/
|
||
|
|
[inspect.custom](_, options) {
|
||
|
|
return `Jack ${inspect(this.toJSON(), options)}`;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// Unwrap and un-indent, so we can wrap description
|
||
|
|
// strings however makes them look nice in the code.
|
||
|
|
const normalize = (s, pre = false) => pre
|
||
|
|
// prepend a ZWSP to each line so cliui doesn't strip it.
|
||
|
|
? s.split('\n').map(l => `\u200b${l}`).join('\n')
|
||
|
|
: s
|
||
|
|
// remove single line breaks, except for lists
|
||
|
|
.replace(/([^\n])\n[ \t]*([^\n])/g, (_, $1, $2) => !/^[-*]/.test($2) ? `${$1} ${$2}` : `${$1}\n${$2}`)
|
||
|
|
// normalize mid-line whitespace
|
||
|
|
.replace(/([^\n])[ \t]+([^\n])/g, '$1 $2')
|
||
|
|
// two line breaks are enough
|
||
|
|
.replace(/\n{3,}/g, '\n\n')
|
||
|
|
.trim();
|
||
|
|
/**
|
||
|
|
* Main entry point. Create and return a {@link Jack} object.
|
||
|
|
*/
|
||
|
|
export const jack = (options = {}) => new Jack(options);
|
||
|
|
//# sourceMappingURL=index.js.map
|