new changes

This commit is contained in:
Niranjan
2026-04-07 05:05:28 +05:30
parent 7c070224bd
commit a18bba15f2
29975 changed files with 3247495 additions and 2761 deletions

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import { inspect, InspectOptions, ParseArgsConfig } from 'node:util';
export type ParseArgsOptions = Exclude<ParseArgsConfig['options'], undefined>;
export type ParseArgsOption = ParseArgsOptions[string];
export type ParseArgsDefault = Exclude<ConfigValue, number | number[]>;
export type ConfigType = 'number' | 'string' | 'boolean';
export declare const isConfigType: (t: unknown) => t is ConfigType;
export type ConfigValuePrimitive = string | boolean | number;
export type ConfigValueArray = string[] | boolean[] | number[];
export type ConfigValue = ConfigValuePrimitive | ConfigValueArray;
/**
* Given a Jack object, get the typeof its ConfigSet
*/
export type Unwrap<J> = J extends Jack<infer C> ? C : never;
/**
* Defines the type of value that is valid, given a config definition's
* {@link ConfigType} and boolean multiple setting
*/
export type ValidValue<T extends ConfigType = ConfigType, M extends boolean = boolean> = [
T,
M
] extends ['number', true] ? number[] : [T, M] extends ['string', true] ? string[] : [T, M] extends ['boolean', true] ? boolean[] : [T, M] extends ['number', false] ? number : [T, M] extends ['string', false] ? string : [T, M] extends ['boolean', false] ? boolean : [T, M] extends ['string', boolean] ? string | string[] : [T, M] extends ['boolean', boolean] ? boolean | boolean[] : [T, M] extends ['number', boolean] ? number | number[] : [T, M] extends [ConfigType, false] ? ConfigValuePrimitive : [T, M] extends [ConfigType, true] ? ConfigValueArray : ConfigValue;
export type ReadonlyArrays = readonly number[] | readonly string[];
/**
* Defines the type of validOptions that are valid, given a config definition's
* {@link ConfigType}
*/
export type ValidOptions<T extends ConfigType> = T extends 'boolean' ? undefined : T extends 'string' ? readonly string[] : T extends 'number' ? readonly number[] : ReadonlyArrays;
/**
* A config field definition, in its full representation.
* This is what is passed in to addFields so `type` is required.
*/
export type ConfigOption<T extends ConfigType = ConfigType, M extends boolean = boolean, O extends undefined | ValidOptions<T> = undefined | ValidOptions<T>> = {
type: T;
short?: string;
default?: ValidValue<T, M> & (O extends ReadonlyArrays ? M extends false ? O[number] : O[number][] : unknown);
description?: string;
hint?: T extends 'boolean' ? undefined : string;
validate?: ((v: unknown) => v is ValidValue<T, M>) | ((v: unknown) => boolean);
validOptions?: O;
delim?: M extends false ? undefined : string;
multiple?: M;
};
/**
* Determine whether an unknown object is a {@link ConfigOption} based only
* on its `type` and `multiple` property
*/
export declare const isConfigOptionOfType: <T extends ConfigType, M extends boolean>(o: unknown, type: T, multi: M) => o is ConfigOption<T, M>;
/**
* Determine whether an unknown object is a {@link ConfigOption} based on
* it having all valid properties
*/
export declare const isConfigOption: <T extends ConfigType, M extends boolean>(o: unknown, type: T, multi: M) => o is ConfigOption<T, M>;
/**
* The meta information for a config option definition, when the
* type and multiple values can be inferred by the method being used
*/
export type ConfigOptionMeta<T extends ConfigType, M extends boolean, O extends ConfigOption<T, M> = ConfigOption<T, M>> = Pick<Partial<O>, 'type'> & Omit<O, 'type'>;
/**
* A set of {@link ConfigOption} objects, referenced by their longOption
* string values.
*/
export type ConfigSet = {
[longOption: string]: ConfigOption;
};
/**
* A set of {@link ConfigOptionMeta} fields, referenced by their longOption
* string values.
*/
export type ConfigMetaSet<T extends ConfigType, M extends boolean> = {
[longOption: string]: ConfigOptionMeta<T, M>;
};
/**
* Infer {@link ConfigSet} fields from a given {@link ConfigMetaSet}
*/
export type ConfigSetFromMetaSet<T extends ConfigType, M extends boolean, S extends ConfigMetaSet<T, M>> = S & {
[longOption in keyof S]: ConfigOption<T, M>;
};
/**
* The 'values' field returned by {@link Jack#parse}. If a value has
* a default field it will be required on the object otherwise it is optional.
*/
export type OptionsResults<T extends ConfigSet> = {
[K in keyof T]: (T[K]['validOptions'] extends ReadonlyArrays ? T[K] extends ConfigOption<'string' | 'number', false> ? T[K]['validOptions'][number] : T[K] extends ConfigOption<'string' | 'number', true> ? T[K]['validOptions'][number][] : never : T[K] extends ConfigOption<'string', false> ? string : T[K] extends ConfigOption<'string', true> ? string[] : T[K] extends ConfigOption<'number', false> ? number : T[K] extends ConfigOption<'number', true> ? number[] : T[K] extends ConfigOption<'boolean', false> ? boolean : T[K] extends ConfigOption<'boolean', true> ? boolean[] : never) | (T[K]['default'] extends ConfigValue ? never : undefined);
};
/**
* The object retured by {@link Jack#parse}
*/
export type Parsed<T extends ConfigSet> = {
values: OptionsResults<T>;
positionals: string[];
};
/**
* A row used when generating the {@link Jack#usage} string
*/
export interface Row {
left?: string;
text: string;
skipLine?: boolean;
type?: string;
}
/**
* A heading for a section in the usage, created by the jack.heading()
* method.
*
* First heading is always level 1, subsequent headings default to 2.
*
* The level of the nearest heading level sets the indentation of the
* description that follows.
*/
export interface Heading extends Row {
type: 'heading';
text: string;
left?: '';
skipLine?: boolean;
level: number;
pre?: boolean;
}
/**
* An arbitrary blob of text describing some stuff, set by the
* jack.description() method.
*
* Indentation determined by level of the nearest header.
*/
export interface Description extends Row {
type: 'description';
text: string;
left?: '';
skipLine?: boolean;
pre?: boolean;
}
/**
* A heading or description row used when generating the {@link Jack#usage}
* string
*/
export type TextRow = Heading | Description;
/**
* Either a {@link TextRow} or a reference to a {@link ConfigOption}
*/
export type UsageField = TextRow | {
type: 'config';
name: string;
value: ConfigOption;
};
/**
* Options provided to the {@link Jack} constructor
*/
export interface JackOptions {
/**
* Whether to allow positional arguments
*
* @default true
*/
allowPositionals?: boolean;
/**
* Prefix to use when reading/writing the environment variables
*
* If not specified, environment behavior will not be available.
*/
envPrefix?: string;
/**
* Environment object to read/write. Defaults `process.env`.
* No effect if `envPrefix` is not set.
*/
env?: Record<string, string | undefined>;
/**
* A short usage string. If not provided, will be generated from the
* options provided, but that can of course be rather verbose if
* there are a lot of options.
*/
usage?: string;
/**
* Stop parsing flags and opts at the first positional argument.
* This is to support cases like `cmd [flags] <subcmd> [options]`, where
* each subcommand may have different options. This effectively treats
* any positional as a `--` argument. Only relevant if `allowPositionals`
* is true.
*
* To do subcommands, set this option, look at the first positional, and
* parse the remaining positionals as appropriate.
*
* @default false
*/
stopAtPositional?: boolean;
/**
* Conditional `stopAtPositional`. If set to a `(string)=>boolean` function,
* will be called with each positional argument encountered. If the function
* returns true, then parsing will stop at that point.
*/
stopAtPositionalTest?: (arg: string) => boolean;
}
/**
* Class returned by the {@link jack} function and all configuration
* definition methods. This is what gets chained together.
*/
export declare class Jack<C extends ConfigSet = {}> {
#private;
constructor(options?: JackOptions);
/**
* Resulting definitions, suitable to be passed to Node's `util.parseArgs`,
* but also including `description` and `short` fields, if set.
*/
get definitions(): C;
/** map of `{ <short>: <long> }` strings for each short name defined */
get shorts(): Record<string, string>;
/**
* options passed to the {@link Jack} constructor
*/
get jackOptions(): JackOptions;
/**
* the data used to generate {@link Jack#usage} and
* {@link Jack#usageMarkdown} content.
*/
get usageFields(): UsageField[];
/**
* Set the default value (which will still be overridden by env or cli)
* as if from a parsed config file. The optional `source` param, if
* provided, will be included in error messages if a value is invalid or
* unknown.
*/
setConfigValues(values: Partial<OptionsResults<C>>, source?: string): this;
/**
* Parse a string of arguments, and return the resulting
* `{ values, positionals }` object.
*
* If an {@link JackOptions#envPrefix} is set, then it will read default
* values from the environment, and write the resulting values back
* to the environment as well.
*
* Environment values always take precedence over any other value, except
* an explicit CLI setting.
*/
parse(args?: string[]): Parsed<C>;
loadEnvDefaults(): void;
applyDefaults(p: Parsed<C>): void;
/**
* Only parse the command line arguments passed in.
* Does not strip off the `node script.js` bits, so it must be just the
* arguments you wish to have parsed.
* Does not read from or write to the environment, or set defaults.
*/
parseRaw(args: string[]): Parsed<C>;
/**
* Validate that any arbitrary object is a valid configuration `values`
* object. Useful when loading config files or other sources.
*/
validate(o: unknown): asserts o is Parsed<C>['values'];
writeEnv(p: Parsed<C>): void;
/**
* Add a heading to the usage output banner
*/
heading(text: string, level?: 1 | 2 | 3 | 4 | 5 | 6, { pre }?: {
pre?: boolean;
}): Jack<C>;
/**
* Add a long-form description to the usage output at this position.
*/
description(text: string, { pre }?: {
pre?: boolean;
}): Jack<C>;
/**
* Add one or more number fields.
*/
num<F extends ConfigMetaSet<'number', false>>(fields: F): Jack<C & ConfigSetFromMetaSet<'number', false, F>>;
/**
* Add one or more multiple number fields.
*/
numList<F extends ConfigMetaSet<'number', true>>(fields: F): Jack<C & ConfigSetFromMetaSet<'number', true, F>>;
/**
* Add one or more string option fields.
*/
opt<F extends ConfigMetaSet<'string', false>>(fields: F): Jack<C & ConfigSetFromMetaSet<'string', false, F>>;
/**
* Add one or more multiple string option fields.
*/
optList<F extends ConfigMetaSet<'string', true>>(fields: F): Jack<C & ConfigSetFromMetaSet<'string', true, F>>;
/**
* Add one or more flag fields.
*/
flag<F extends ConfigMetaSet<'boolean', false>>(fields: F): Jack<C & ConfigSetFromMetaSet<'boolean', false, F>>;
/**
* Add one or more multiple flag fields.
*/
flagList<F extends ConfigMetaSet<'boolean', true>>(fields: F): Jack<C & ConfigSetFromMetaSet<'boolean', true, F>>;
/**
* 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<F extends ConfigSet>(fields: F): Jack<C & F>;
/**
* Return the usage banner for the given configuration
*/
usage(): string;
/**
* Return the usage banner markdown for the given configuration
*/
usageMarkdown(): string;
/**
* Return the configuration options as a plain object
*/
toJSON(): {
[k: string]: {
hint?: string | undefined;
default?: ConfigValue | undefined;
validOptions?: readonly number[] | readonly string[] | undefined;
validate?: ((v: unknown) => boolean) | ((v: unknown) => v is ConfigValue) | undefined;
description?: string | undefined;
short?: string | undefined;
delim?: string | undefined;
multiple?: boolean | undefined;
type: ConfigType;
};
};
/**
* Custom printer for `util.inspect`
*/
[inspect.custom](_: number, options: InspectOptions): string;
}
/**
* Main entry point. Create and return a {@link Jack} object.
*/
export declare const jack: (options?: JackOptions) => Jack<{}>;
//# sourceMappingURL=index.d.ts.map

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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.jack = exports.Jack = exports.isConfigOption = exports.isConfigOptionOfType = exports.isConfigType = void 0;
const node_util_1 = require("node:util");
const min_1 = require("@isaacs/cliui/min");
const node_path_1 = require("node:path");
const isConfigType = (t) => typeof t === 'string' &&
(t === 'string' || t === 'number' || t === 'boolean');
exports.isConfigType = isConfigType;
const isValidValue = (v, type, multi) => {
if (multi) {
if (!Array.isArray(v))
return false;
return !v.some((v) => !isValidValue(v, type, false));
}
if (Array.isArray(v))
return false;
return typeof v === type;
};
const isValidOption = (v, vo) => !!vo &&
(Array.isArray(v) ? v.every(x => isValidOption(x, vo)) : vo.includes(v));
/**
* Determine whether an unknown object is a {@link ConfigOption} based only
* on its `type` and `multiple` property
*/
const isConfigOptionOfType = (o, type, multi) => !!o &&
typeof o === 'object' &&
'type' in o &&
(0, exports.isConfigType)(o.type) &&
o.type === type &&
!!o.multiple === multi;
exports.isConfigOptionOfType = isConfigOptionOfType;
/**
* Determine whether an unknown object is a {@link ConfigOption} based on
* it having all valid properties
*/
const isConfigOption = (o, type, multi) => (0, exports.isConfigOptionOfType)(o, type, multi) &&
undefOrType(o.short, 'string') &&
undefOrType(o.description, 'string') &&
undefOrType(o.hint, 'string') &&
undefOrType(o.validate, 'function') &&
(o.type === 'boolean' ?
o.validOptions === undefined
: undefOrTypeArray(o.validOptions, o.type)) &&
(o.default === undefined || isValidValue(o.default, type, multi));
exports.isConfigOption = isConfigOption;
const isHeading = (r) => r.type === 'heading';
const isDescription = (r) => r.type === 'description';
const width = Math.min(process?.stdout?.columns ?? 80, 80);
// indentation spaces from heading level
const indent = (n) => (n - 1) * 2;
const toEnvKey = (pref, key) => [pref, key.replace(/[^a-zA-Z0-9]+/g, ' ')]
.join(' ')
.trim()
.toUpperCase()
.replace(/ /g, '_');
const toEnvVal = (value, delim = '\n') => {
const str = typeof value === 'string' ? value
: typeof value === 'boolean' ?
value ? '1'
: '0'
: typeof value === 'number' ? String(value)
: Array.isArray(value) ?
value.map((v) => toEnvVal(v)).join(delim)
: /* c8 ignore start */ undefined;
if (typeof str !== 'string') {
throw new Error(`could not serialize value to environment: ${JSON.stringify(value)}`, { cause: { code: 'JACKSPEAK' } });
}
/* c8 ignore stop */
return str;
};
const fromEnvVal = (env, type, multiple, delim = '\n') => (multiple ?
env ? env.split(delim).map(v => fromEnvVal(v, type, false))
: []
: type === 'string' ? env
: type === 'boolean' ? env === '1'
: +env.trim());
const undefOrType = (v, t) => v === undefined || typeof v === t;
const undefOrTypeArray = (v, t) => v === undefined || (Array.isArray(v) && v.every(x => typeof x === t));
// print the value type, for error message reporting
const valueType = (v) => typeof v === 'string' ? 'string'
: typeof v === 'boolean' ? 'boolean'
: typeof v === 'number' ? 'number'
: Array.isArray(v) ?
`${joinTypes([...new Set(v.map(v => valueType(v)))])}[]`
: `${v.type}${v.multiple ? '[]' : ''}`;
const joinTypes = (types) => types.length === 1 && typeof types[0] === 'string' ?
types[0]
: `(${types.join('|')})`;
const validateFieldMeta = (field, fieldMeta) => {
if (fieldMeta) {
if (field.type !== undefined && field.type !== fieldMeta.type) {
throw new TypeError(`invalid type`, {
cause: {
found: field.type,
wanted: [fieldMeta.type, undefined],
},
});
}
if (field.multiple !== undefined &&
!!field.multiple !== fieldMeta.multiple) {
throw new TypeError(`invalid multiple`, {
cause: {
found: field.multiple,
wanted: [fieldMeta.multiple, undefined],
},
});
}
return fieldMeta;
}
if (!(0, exports.isConfigType)(field.type)) {
throw new TypeError(`invalid type`, {
cause: {
found: field.type,
wanted: ['string', 'number', 'boolean'],
},
});
}
return {
type: field.type,
multiple: !!field.multiple,
};
};
const validateField = (o, type, multiple) => {
const validateValidOptions = (def, validOptions) => {
if (!undefOrTypeArray(validOptions, type)) {
throw new TypeError('invalid validOptions', {
cause: {
found: validOptions,
wanted: valueType({ type, multiple: true }),
},
});
}
if (def !== undefined && validOptions !== undefined) {
const valid = Array.isArray(def) ?
def.every(v => validOptions.includes(v))
: validOptions.includes(def);
if (!valid) {
throw new TypeError('invalid default value not in validOptions', {
cause: {
found: def,
wanted: validOptions,
},
});
}
}
};
if (o.default !== undefined &&
!isValidValue(o.default, type, multiple)) {
throw new TypeError('invalid default value', {
cause: {
found: o.default,
wanted: valueType({ type, multiple }),
},
});
}
if ((0, exports.isConfigOptionOfType)(o, 'number', false) ||
(0, exports.isConfigOptionOfType)(o, 'number', true)) {
validateValidOptions(o.default, o.validOptions);
}
else if ((0, exports.isConfigOptionOfType)(o, 'string', false) ||
(0, exports.isConfigOptionOfType)(o, 'string', true)) {
validateValidOptions(o.default, o.validOptions);
}
else if ((0, exports.isConfigOptionOfType)(o, 'boolean', false) ||
(0, exports.isConfigOptionOfType)(o, 'boolean', true)) {
if (o.hint !== undefined) {
throw new TypeError('cannot provide hint for flag');
}
if (o.validOptions !== undefined) {
throw new TypeError('cannot provide validOptions for flag');
}
}
return o;
};
const toParseArgsOptionsConfig = (options) => {
return Object.entries(options).reduce((acc, [longOption, o]) => {
const p = {
type: 'string',
multiple: !!o.multiple,
...(typeof o.short === 'string' ? { short: o.short } : undefined),
};
const setNoBool = () => {
if (!longOption.startsWith('no-') && !options[`no-${longOption}`]) {
acc[`no-${longOption}`] = {
type: 'boolean',
multiple: !!o.multiple,
};
}
};
const setDefault = (def, fn) => {
if (def !== undefined) {
p.default = fn(def);
}
};
if ((0, exports.isConfigOption)(o, 'number', false)) {
setDefault(o.default, String);
}
else if ((0, exports.isConfigOption)(o, 'number', true)) {
setDefault(o.default, d => d.map(v => String(v)));
}
else if ((0, exports.isConfigOption)(o, 'string', false) ||
(0, exports.isConfigOption)(o, 'string', true)) {
setDefault(o.default, v => v);
}
else if ((0, exports.isConfigOption)(o, 'boolean', false) ||
(0, exports.isConfigOption)(o, 'boolean', true)) {
p.type = 'boolean';
setDefault(o.default, v => v);
setNoBool();
}
acc[longOption] = p;
return acc;
}, {});
};
/**
* Class returned by the {@link jack} function and all configuration
* definition methods. This is what gets chained together.
*/
class Jack {
#configSet;
#shorts;
#options;
#fields = [];
#env;
#envPrefix;
#allowPositionals;
#usage;
#usageMarkdown;
constructor(options = {}) {
this.#options = options;
this.#allowPositionals = options.allowPositionals !== false;
this.#env =
this.#options.env === undefined ? process.env : this.#options.env;
this.#envPrefix = options.envPrefix;
// We need to fib a little, because it's always the same object, but it
// starts out as having an empty config set. Then each method that adds
// fields returns `this as Jack<C & { ...newConfigs }>`
this.#configSet = Object.create(null);
this.#shorts = Object.create(null);
}
/**
* Resulting definitions, suitable to be passed to Node's `util.parseArgs`,
* but also including `description` and `short` fields, if set.
*/
get definitions() {
return this.#configSet;
}
/** map of `{ <short>: <long> }` strings for each short name defined */
get shorts() {
return this.#shorts;
}
/**
* options passed to the {@link Jack} constructor
*/
get jackOptions() {
return this.#options;
}
/**
* the data used to generate {@link Jack#usage} and
* {@link Jack#usageMarkdown} content.
*/
get usageFields() {
return this.#fields;
}
/**
* Set the default value (which will still be overridden by env or cli)
* as if from a parsed config file. The optional `source` param, if
* provided, will be included in error messages if a value is invalid or
* unknown.
*/
setConfigValues(values, source = '') {
try {
this.validate(values);
}
catch (er) {
if (source && er instanceof Error) {
/* c8 ignore next */
const cause = typeof er.cause === 'object' ? er.cause : {};
er.cause = { ...cause, path: source };
Error.captureStackTrace(er, this.setConfigValues);
}
throw er;
}
for (const [field, value] of Object.entries(values)) {
const my = this.#configSet[field];
// already validated, just for TS's benefit
/* c8 ignore start */
if (!my) {
throw new Error('unexpected field in config set: ' + field, {
cause: {
code: 'JACKSPEAK',
found: field,
},
});
}
/* c8 ignore stop */
my.default = value;
}
return this;
}
/**
* Parse a string of arguments, and return the resulting
* `{ values, positionals }` object.
*
* If an {@link JackOptions#envPrefix} is set, then it will read default
* values from the environment, and write the resulting values back
* to the environment as well.
*
* Environment values always take precedence over any other value, except
* an explicit CLI setting.
*/
parse(args = process.argv) {
this.loadEnvDefaults();
const p = this.parseRaw(args);
this.applyDefaults(p);
this.writeEnv(p);
return p;
}
loadEnvDefaults() {
if (this.#envPrefix) {
for (const [field, my] of Object.entries(this.#configSet)) {
const ek = toEnvKey(this.#envPrefix, field);
const env = this.#env[ek];
if (env !== undefined) {
my.default = fromEnvVal(env, my.type, !!my.multiple, my.delim);
}
}
}
}
applyDefaults(p) {
for (const [field, c] of Object.entries(this.#configSet)) {
if (c.default !== undefined && !(field in p.values)) {
//@ts-ignore
p.values[field] = c.default;
}
}
}
/**
* Only parse the command line arguments passed in.
* Does not strip off the `node script.js` bits, so it must be just the
* arguments you wish to have parsed.
* Does not read from or write to the environment, or set defaults.
*/
parseRaw(args) {
if (args === process.argv) {
args = args.slice(process._eval !== undefined ? 1 : 2);
}
const result = (0, node_util_1.parseArgs)({
args,
options: toParseArgsOptionsConfig(this.#configSet),
// always strict, but using our own logic
strict: false,
allowPositionals: this.#allowPositionals,
tokens: true,
});
const p = {
values: {},
positionals: [],
};
for (const token of result.tokens) {
if (token.kind === 'positional') {
p.positionals.push(token.value);
if (this.#options.stopAtPositional ||
this.#options.stopAtPositionalTest?.(token.value)) {
p.positionals.push(...args.slice(token.index + 1));
break;
}
}
else if (token.kind === 'option') {
let value = undefined;
if (token.name.startsWith('no-')) {
const my = this.#configSet[token.name];
const pname = token.name.substring('no-'.length);
const pos = this.#configSet[pname];
if (pos &&
pos.type === 'boolean' &&
(!my ||
(my.type === 'boolean' && !!my.multiple === !!pos.multiple))) {
value = false;
token.name = pname;
}
}
const my = this.#configSet[token.name];
if (!my) {
throw new Error(`Unknown option '${token.rawName}'. ` +
`To specify a positional argument starting with a '-', ` +
`place it at the end of the command after '--', as in ` +
`'-- ${token.rawName}'`, {
cause: {
code: 'JACKSPEAK',
found: token.rawName + (token.value ? `=${token.value}` : ''),
},
});
}
if (value === undefined) {
if (token.value === undefined) {
if (my.type !== 'boolean') {
throw new Error(`No value provided for ${token.rawName}, expected ${my.type}`, {
cause: {
code: 'JACKSPEAK',
name: token.rawName,
wanted: valueType(my),
},
});
}
value = true;
}
else {
if (my.type === 'boolean') {
throw new Error(`Flag ${token.rawName} does not take a value, received '${token.value}'`, { cause: { code: 'JACKSPEAK', found: token } });
}
if (my.type === 'string') {
value = token.value;
}
else {
value = +token.value;
if (value !== value) {
throw new Error(`Invalid value '${token.value}' provided for ` +
`'${token.rawName}' option, expected number`, {
cause: {
code: 'JACKSPEAK',
name: token.rawName,
found: token.value,
wanted: 'number',
},
});
}
}
}
}
if (my.multiple) {
const pv = p.values;
const tn = pv[token.name] ?? [];
pv[token.name] = tn;
tn.push(value);
}
else {
const pv = p.values;
pv[token.name] = value;
}
}
}
for (const [field, value] of Object.entries(p.values)) {
const valid = this.#configSet[field]?.validate;
const validOptions = this.#configSet[field]?.validOptions;
const cause = validOptions && !isValidOption(value, validOptions) ?
{ name: field, found: value, validOptions }
: valid && !valid(value) ? { name: field, found: value }
: undefined;
if (cause) {
throw new Error(`Invalid value provided for --${field}: ${JSON.stringify(value)}`, { cause: { ...cause, code: 'JACKSPEAK' } });
}
}
return p;
}
/**
* do not set fields as 'no-foo' if 'foo' exists and both are bools
* just set foo.
*/
#noNoFields(f, val, s = f) {
if (!f.startsWith('no-') || typeof val !== 'boolean')
return;
const yes = f.substring('no-'.length);
// recurse so we get the core config key we care about.
this.#noNoFields(yes, val, s);
if (this.#configSet[yes]?.type === 'boolean') {
throw new Error(`do not set '${s}', instead set '${yes}' as desired.`, { cause: { code: 'JACKSPEAK', found: s, wanted: yes } });
}
}
/**
* 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', {
cause: { code: 'JACKSPEAK', found: o },
});
}
const opts = o;
for (const field in o) {
const value = opts[field];
/* c8 ignore next - for TS */
if (value === undefined)
continue;
this.#noNoFields(field, value);
const config = this.#configSet[field];
if (!config) {
throw new Error(`Unknown config option: ${field}`, {
cause: { code: 'JACKSPEAK', found: field },
});
}
if (!isValidValue(value, config.type, !!config.multiple)) {
throw new Error(`Invalid value ${valueType(value)} for ${field}, expected ${valueType(config)}`, {
cause: {
code: 'JACKSPEAK',
name: field,
found: value,
wanted: valueType(config),
},
});
}
const cause = config.validOptions && !isValidOption(value, config.validOptions) ?
{ name: field, found: value, validOptions: config.validOptions }
: config.validate && !config.validate(value) ?
{ name: field, found: value }
: undefined;
if (cause) {
throw new Error(`Invalid config value for ${field}: ${JSON.stringify(value)}`, {
cause: { ...cause, code: 'JACKSPEAK' },
});
}
}
}
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, { pre = false } = {}) {
if (level === undefined) {
level = this.#fields.some(r => isHeading(r)) ? 2 : 1;
}
this.#fields.push({ type: 'heading', text, level, pre });
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.#addFieldsWith(fields, 'number', false);
}
/**
* Add one or more multiple number fields.
*/
numList(fields) {
return this.#addFieldsWith(fields, 'number', true);
}
/**
* Add one or more string option fields.
*/
opt(fields) {
return this.#addFieldsWith(fields, 'string', false);
}
/**
* Add one or more multiple string option fields.
*/
optList(fields) {
return this.#addFieldsWith(fields, 'string', true);
}
/**
* Add one or more flag fields.
*/
flag(fields) {
return this.#addFieldsWith(fields, 'boolean', false);
}
/**
* Add one or more multiple flag fields.
*/
flagList(fields) {
return this.#addFieldsWith(fields, 'boolean', true);
}
/**
* 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) {
return this.#addFields(this, fields);
}
#addFieldsWith(fields, type, multiple) {
return this.#addFields(this, fields, {
type,
multiple,
});
}
#addFields(next, fields, opt) {
Object.assign(next.#configSet, Object.fromEntries(Object.entries(fields).map(([name, field]) => {
this.#validateName(name, field);
const { type, multiple } = validateFieldMeta(field, opt);
const value = { ...field, type, multiple };
validateField(value, type, multiple);
next.#fields.push({ type: 'config', name, value });
return [name, value];
})));
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 ${name}`);
}
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 ${this.#shorts[field.short]}`);
}
this.#shorts[field.short] = name;
this.#shorts[name] = name;
}
}
/**
* Return the usage banner for the given configuration
*/
usage() {
if (this.#usage)
return this.#usage;
let headingLevel = 1;
//@ts-ignore
const ui = (0, min_1.cliui)({ width });
const first = this.#fields[0];
let start = first?.type === 'heading' ? 1 : 0;
if (first?.type === 'heading') {
ui.div({
padding: [0, 0, 0, 0],
text: normalize(first.text),
});
}
ui.div({ padding: [0, 0, 0, 0], text: 'Usage:' });
if (this.#options.usage) {
ui.div({
text: this.#options.usage,
padding: [0, 0, 0, 2],
});
}
else {
const cmd = (0, node_path_1.basename)(String(process.argv[1]));
const shortFlags = [];
const shorts = [];
const flags = [];
const opts = [];
for (const [field, config] of Object.entries(this.#configSet)) {
if (config.short) {
if (config.type === 'boolean')
shortFlags.push(config.short);
else
shorts.push([config.short, config.hint || field]);
}
else {
if (config.type === 'boolean')
flags.push(field);
else
opts.push([field, config.hint || field]);
}
}
const sf = shortFlags.length ? ' -' + shortFlags.join('') : '';
const so = shorts.map(([k, v]) => ` --${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 (maybeDesc && 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: '' });
}
const { rows, maxWidth } = this.#usageRows(start);
// 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 - 3) {
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 usage banner markdown for the given configuration
*/
usageMarkdown() {
if (this.#usageMarkdown)
return this.#usageMarkdown;
const out = [];
let headingLevel = 1;
const first = this.#fields[0];
let start = first?.type === 'heading' ? 1 : 0;
if (first?.type === 'heading') {
out.push(`# ${normalizeOneLine(first.text)}`);
}
out.push('Usage:');
if (this.#options.usage) {
out.push(normalizeMarkdown(this.#options.usage, true));
}
else {
const cmd = (0, node_path_1.basename)(String(process.argv[1]));
const shortFlags = [];
const shorts = [];
const flags = [];
const opts = [];
for (const [field, config] of Object.entries(this.#configSet)) {
if (config.short) {
if (config.type === 'boolean')
shortFlags.push(config.short);
else
shorts.push([config.short, config.hint || field]);
}
else {
if (config.type === 'boolean')
flags.push(field);
else
opts.push([field, config.hint || field]);
}
}
const sf = shortFlags.length ? ' -' + shortFlags.join('') : '';
const so = shorts.map(([k, v]) => ` --${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}${lo}`.trim();
out.push(normalizeMarkdown(usage, true));
}
const maybeDesc = this.#fields[start];
if (maybeDesc && isDescription(maybeDesc)) {
out.push(normalizeMarkdown(maybeDesc.text, maybeDesc.pre));
start++;
}
const { rows } = this.#usageRows(start);
// heading level in markdown is number of # ahead of text
for (const row of rows) {
if (row.left) {
out.push('#'.repeat(headingLevel + 1) +
' ' +
normalizeOneLine(row.left, true));
if (row.text)
out.push(normalizeMarkdown(row.text));
}
else if (isHeading(row)) {
const { level } = row;
headingLevel = level;
out.push(`${'#'.repeat(headingLevel)} ${normalizeOneLine(row.text, row.pre)}`);
}
else {
out.push(normalizeMarkdown(row.text, !!row.pre));
}
}
return (this.#usageMarkdown = out.join('\n\n') + '\n');
}
#usageRows(start) {
// turn each config type into a row, and figure out the width of the
// left hand indentation for the option descriptions.
const maxMax = Math.max(12, Math.min(26, Math.floor(width / 3)));
let maxWidth = 8;
let prev = undefined;
const rows = [];
for (const field of this.#fields.slice(start)) {
if (field.type !== 'config') {
if (prev?.type === 'config')
prev.skipLine = true;
prev = undefined;
field.text = normalize(field.text, !!field.pre);
rows.push(field);
continue;
}
const { value } = field;
const desc = value.description || '';
const mult = value.multiple ? 'Can be set multiple times' : '';
const opts = value.validOptions?.length ?
'Valid options: ' +
value.validOptions.map(v => JSON.stringify(v)).join(', ')
: '';
const dmDelim = desc.includes('\n') ? '\n\n' : '\n';
const extra = [opts, mult].join(dmDelim).trim();
const text = (normalize(desc) + dmDelim + extra).trim();
const hint = value.hint ||
(value.type === 'number' ? 'n'
: value.type === 'string' ? field.name
: undefined);
const short = !value.short ? ''
: value.type === 'boolean' ? `-${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);
}
return { rows, maxWidth };
}
/**
* 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: normalize(def.description) }
: {}),
...(def.validate ? { validate: def.validate } : {}),
...(def.validOptions ? { validOptions: def.validOptions } : {}),
...(def.default !== undefined ? { default: def.default } : {}),
...(def.hint ? { hint: def.hint } : {}),
},
]));
}
/**
* Custom printer for `util.inspect`
*/
[node_util_1.inspect.custom](_, options) {
return `Jack ${(0, node_util_1.inspect)(this.toJSON(), options)}`;
}
}
exports.Jack = Jack;
/**
* Main entry point. Create and return a {@link Jack} object.
*/
const jack = (options = {}) => new Jack(options);
exports.jack = jack;
// Unwrap and un-indent, so we can wrap description
// strings however makes them look nice in the code.
const normalize = (s, pre = false) => {
if (pre)
// prepend a ZWSP to each line so cliui doesn't strip it.
return s
.split('\n')
.map(l => `\u200b${l}`)
.join('\n');
return s
.split(/^\s*```\s*$/gm)
.map((s, i) => {
if (i % 2 === 1) {
if (!s.trim()) {
return `\`\`\`\n\`\`\`\n`;
}
// outdent the ``` blocks, but preserve whitespace otherwise.
const split = s.split('\n');
// throw out the \n at the start and end
split.pop();
split.shift();
const si = split.reduce((shortest, l) => {
/* c8 ignore next */
const ind = l.match(/^\s*/)?.[0] ?? '';
if (ind.length)
return Math.min(ind.length, shortest);
else
return shortest;
}, Infinity);
/* c8 ignore next */
const i = isFinite(si) ? si : 0;
return ('\n```\n' +
split.map(s => `\u200b${s.substring(i)}`).join('\n') +
'\n```\n');
}
return (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 $2')
// two line breaks are enough
.replace(/\n{3,}/g, '\n\n')
// remove any spaces at the start of a line
.replace(/\n[ \t]+/g, '\n')
.trim());
})
.join('\n');
};
// normalize for markdown printing, remove leading spaces on lines
const normalizeMarkdown = (s, pre = false) => {
const n = normalize(s, pre).replace(/\\/g, '\\\\');
return pre ?
`\`\`\`\n${n.replace(/\u200b/g, '')}\n\`\`\``
: n.replace(/\n +/g, '\n').trim();
};
const normalizeOneLine = (s, pre = false) => {
const n = normalize(s, pre)
.replace(/[\s\u200b]+/g, ' ')
.trim();
return pre ? `\`${n}\`` : n;
};
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{
"type": "commonjs"
}

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import { inspect, InspectOptions, ParseArgsConfig } from 'node:util';
export type ParseArgsOptions = Exclude<ParseArgsConfig['options'], undefined>;
export type ParseArgsOption = ParseArgsOptions[string];
export type ParseArgsDefault = Exclude<ConfigValue, number | number[]>;
export type ConfigType = 'number' | 'string' | 'boolean';
export declare const isConfigType: (t: unknown) => t is ConfigType;
export type ConfigValuePrimitive = string | boolean | number;
export type ConfigValueArray = string[] | boolean[] | number[];
export type ConfigValue = ConfigValuePrimitive | ConfigValueArray;
/**
* Given a Jack object, get the typeof its ConfigSet
*/
export type Unwrap<J> = J extends Jack<infer C> ? C : never;
/**
* Defines the type of value that is valid, given a config definition's
* {@link ConfigType} and boolean multiple setting
*/
export type ValidValue<T extends ConfigType = ConfigType, M extends boolean = boolean> = [
T,
M
] extends ['number', true] ? number[] : [T, M] extends ['string', true] ? string[] : [T, M] extends ['boolean', true] ? boolean[] : [T, M] extends ['number', false] ? number : [T, M] extends ['string', false] ? string : [T, M] extends ['boolean', false] ? boolean : [T, M] extends ['string', boolean] ? string | string[] : [T, M] extends ['boolean', boolean] ? boolean | boolean[] : [T, M] extends ['number', boolean] ? number | number[] : [T, M] extends [ConfigType, false] ? ConfigValuePrimitive : [T, M] extends [ConfigType, true] ? ConfigValueArray : ConfigValue;
export type ReadonlyArrays = readonly number[] | readonly string[];
/**
* Defines the type of validOptions that are valid, given a config definition's
* {@link ConfigType}
*/
export type ValidOptions<T extends ConfigType> = T extends 'boolean' ? undefined : T extends 'string' ? readonly string[] : T extends 'number' ? readonly number[] : ReadonlyArrays;
/**
* A config field definition, in its full representation.
* This is what is passed in to addFields so `type` is required.
*/
export type ConfigOption<T extends ConfigType = ConfigType, M extends boolean = boolean, O extends undefined | ValidOptions<T> = undefined | ValidOptions<T>> = {
type: T;
short?: string;
default?: ValidValue<T, M> & (O extends ReadonlyArrays ? M extends false ? O[number] : O[number][] : unknown);
description?: string;
hint?: T extends 'boolean' ? undefined : string;
validate?: ((v: unknown) => v is ValidValue<T, M>) | ((v: unknown) => boolean);
validOptions?: O;
delim?: M extends false ? undefined : string;
multiple?: M;
};
/**
* Determine whether an unknown object is a {@link ConfigOption} based only
* on its `type` and `multiple` property
*/
export declare const isConfigOptionOfType: <T extends ConfigType, M extends boolean>(o: unknown, type: T, multi: M) => o is ConfigOption<T, M>;
/**
* Determine whether an unknown object is a {@link ConfigOption} based on
* it having all valid properties
*/
export declare const isConfigOption: <T extends ConfigType, M extends boolean>(o: unknown, type: T, multi: M) => o is ConfigOption<T, M>;
/**
* The meta information for a config option definition, when the
* type and multiple values can be inferred by the method being used
*/
export type ConfigOptionMeta<T extends ConfigType, M extends boolean, O extends ConfigOption<T, M> = ConfigOption<T, M>> = Pick<Partial<O>, 'type'> & Omit<O, 'type'>;
/**
* A set of {@link ConfigOption} objects, referenced by their longOption
* string values.
*/
export type ConfigSet = {
[longOption: string]: ConfigOption;
};
/**
* A set of {@link ConfigOptionMeta} fields, referenced by their longOption
* string values.
*/
export type ConfigMetaSet<T extends ConfigType, M extends boolean> = {
[longOption: string]: ConfigOptionMeta<T, M>;
};
/**
* Infer {@link ConfigSet} fields from a given {@link ConfigMetaSet}
*/
export type ConfigSetFromMetaSet<T extends ConfigType, M extends boolean, S extends ConfigMetaSet<T, M>> = S & {
[longOption in keyof S]: ConfigOption<T, M>;
};
/**
* The 'values' field returned by {@link Jack#parse}. If a value has
* a default field it will be required on the object otherwise it is optional.
*/
export type OptionsResults<T extends ConfigSet> = {
[K in keyof T]: (T[K]['validOptions'] extends ReadonlyArrays ? T[K] extends ConfigOption<'string' | 'number', false> ? T[K]['validOptions'][number] : T[K] extends ConfigOption<'string' | 'number', true> ? T[K]['validOptions'][number][] : never : T[K] extends ConfigOption<'string', false> ? string : T[K] extends ConfigOption<'string', true> ? string[] : T[K] extends ConfigOption<'number', false> ? number : T[K] extends ConfigOption<'number', true> ? number[] : T[K] extends ConfigOption<'boolean', false> ? boolean : T[K] extends ConfigOption<'boolean', true> ? boolean[] : never) | (T[K]['default'] extends ConfigValue ? never : undefined);
};
/**
* The object retured by {@link Jack#parse}
*/
export type Parsed<T extends ConfigSet> = {
values: OptionsResults<T>;
positionals: string[];
};
/**
* A row used when generating the {@link Jack#usage} string
*/
export interface Row {
left?: string;
text: string;
skipLine?: boolean;
type?: string;
}
/**
* A heading for a section in the usage, created by the jack.heading()
* method.
*
* First heading is always level 1, subsequent headings default to 2.
*
* The level of the nearest heading level sets the indentation of the
* description that follows.
*/
export interface Heading extends Row {
type: 'heading';
text: string;
left?: '';
skipLine?: boolean;
level: number;
pre?: boolean;
}
/**
* An arbitrary blob of text describing some stuff, set by the
* jack.description() method.
*
* Indentation determined by level of the nearest header.
*/
export interface Description extends Row {
type: 'description';
text: string;
left?: '';
skipLine?: boolean;
pre?: boolean;
}
/**
* A heading or description row used when generating the {@link Jack#usage}
* string
*/
export type TextRow = Heading | Description;
/**
* Either a {@link TextRow} or a reference to a {@link ConfigOption}
*/
export type UsageField = TextRow | {
type: 'config';
name: string;
value: ConfigOption;
};
/**
* Options provided to the {@link Jack} constructor
*/
export interface JackOptions {
/**
* Whether to allow positional arguments
*
* @default true
*/
allowPositionals?: boolean;
/**
* Prefix to use when reading/writing the environment variables
*
* If not specified, environment behavior will not be available.
*/
envPrefix?: string;
/**
* Environment object to read/write. Defaults `process.env`.
* No effect if `envPrefix` is not set.
*/
env?: Record<string, string | undefined>;
/**
* A short usage string. If not provided, will be generated from the
* options provided, but that can of course be rather verbose if
* there are a lot of options.
*/
usage?: string;
/**
* Stop parsing flags and opts at the first positional argument.
* This is to support cases like `cmd [flags] <subcmd> [options]`, where
* each subcommand may have different options. This effectively treats
* any positional as a `--` argument. Only relevant if `allowPositionals`
* is true.
*
* To do subcommands, set this option, look at the first positional, and
* parse the remaining positionals as appropriate.
*
* @default false
*/
stopAtPositional?: boolean;
/**
* Conditional `stopAtPositional`. If set to a `(string)=>boolean` function,
* will be called with each positional argument encountered. If the function
* returns true, then parsing will stop at that point.
*/
stopAtPositionalTest?: (arg: string) => boolean;
}
/**
* Class returned by the {@link jack} function and all configuration
* definition methods. This is what gets chained together.
*/
export declare class Jack<C extends ConfigSet = {}> {
#private;
constructor(options?: JackOptions);
/**
* Resulting definitions, suitable to be passed to Node's `util.parseArgs`,
* but also including `description` and `short` fields, if set.
*/
get definitions(): C;
/** map of `{ <short>: <long> }` strings for each short name defined */
get shorts(): Record<string, string>;
/**
* options passed to the {@link Jack} constructor
*/
get jackOptions(): JackOptions;
/**
* the data used to generate {@link Jack#usage} and
* {@link Jack#usageMarkdown} content.
*/
get usageFields(): UsageField[];
/**
* Set the default value (which will still be overridden by env or cli)
* as if from a parsed config file. The optional `source` param, if
* provided, will be included in error messages if a value is invalid or
* unknown.
*/
setConfigValues(values: Partial<OptionsResults<C>>, source?: string): this;
/**
* Parse a string of arguments, and return the resulting
* `{ values, positionals }` object.
*
* If an {@link JackOptions#envPrefix} is set, then it will read default
* values from the environment, and write the resulting values back
* to the environment as well.
*
* Environment values always take precedence over any other value, except
* an explicit CLI setting.
*/
parse(args?: string[]): Parsed<C>;
loadEnvDefaults(): void;
applyDefaults(p: Parsed<C>): void;
/**
* Only parse the command line arguments passed in.
* Does not strip off the `node script.js` bits, so it must be just the
* arguments you wish to have parsed.
* Does not read from or write to the environment, or set defaults.
*/
parseRaw(args: string[]): Parsed<C>;
/**
* Validate that any arbitrary object is a valid configuration `values`
* object. Useful when loading config files or other sources.
*/
validate(o: unknown): asserts o is Parsed<C>['values'];
writeEnv(p: Parsed<C>): void;
/**
* Add a heading to the usage output banner
*/
heading(text: string, level?: 1 | 2 | 3 | 4 | 5 | 6, { pre }?: {
pre?: boolean;
}): Jack<C>;
/**
* Add a long-form description to the usage output at this position.
*/
description(text: string, { pre }?: {
pre?: boolean;
}): Jack<C>;
/**
* Add one or more number fields.
*/
num<F extends ConfigMetaSet<'number', false>>(fields: F): Jack<C & ConfigSetFromMetaSet<'number', false, F>>;
/**
* Add one or more multiple number fields.
*/
numList<F extends ConfigMetaSet<'number', true>>(fields: F): Jack<C & ConfigSetFromMetaSet<'number', true, F>>;
/**
* Add one or more string option fields.
*/
opt<F extends ConfigMetaSet<'string', false>>(fields: F): Jack<C & ConfigSetFromMetaSet<'string', false, F>>;
/**
* Add one or more multiple string option fields.
*/
optList<F extends ConfigMetaSet<'string', true>>(fields: F): Jack<C & ConfigSetFromMetaSet<'string', true, F>>;
/**
* Add one or more flag fields.
*/
flag<F extends ConfigMetaSet<'boolean', false>>(fields: F): Jack<C & ConfigSetFromMetaSet<'boolean', false, F>>;
/**
* Add one or more multiple flag fields.
*/
flagList<F extends ConfigMetaSet<'boolean', true>>(fields: F): Jack<C & ConfigSetFromMetaSet<'boolean', true, F>>;
/**
* 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<F extends ConfigSet>(fields: F): Jack<C & F>;
/**
* Return the usage banner for the given configuration
*/
usage(): string;
/**
* Return the usage banner markdown for the given configuration
*/
usageMarkdown(): string;
/**
* Return the configuration options as a plain object
*/
toJSON(): {
[k: string]: {
hint?: string | undefined;
default?: ConfigValue | undefined;
validOptions?: readonly number[] | readonly string[] | undefined;
validate?: ((v: unknown) => boolean) | ((v: unknown) => v is ConfigValue) | undefined;
description?: string | undefined;
short?: string | undefined;
delim?: string | undefined;
multiple?: boolean | undefined;
type: ConfigType;
};
};
/**
* Custom printer for `util.inspect`
*/
[inspect.custom](_: number, options: InspectOptions): string;
}
/**
* Main entry point. Create and return a {@link Jack} object.
*/
export declare const jack: (options?: JackOptions) => Jack<{}>;
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import { inspect, parseArgs, } from 'node:util';
import { cliui } from '@isaacs/cliui/min';
import { basename } from 'node:path';
export const isConfigType = (t) => typeof t === 'string' &&
(t === 'string' || t === 'number' || t === 'boolean');
const isValidValue = (v, type, multi) => {
if (multi) {
if (!Array.isArray(v))
return false;
return !v.some((v) => !isValidValue(v, type, false));
}
if (Array.isArray(v))
return false;
return typeof v === type;
};
const isValidOption = (v, vo) => !!vo &&
(Array.isArray(v) ? v.every(x => isValidOption(x, vo)) : vo.includes(v));
/**
* Determine whether an unknown object is a {@link ConfigOption} based only
* on its `type` and `multiple` property
*/
export const isConfigOptionOfType = (o, type, multi) => !!o &&
typeof o === 'object' &&
'type' in o &&
isConfigType(o.type) &&
o.type === type &&
!!o.multiple === multi;
/**
* Determine whether an unknown object is a {@link ConfigOption} based on
* it having all valid properties
*/
export const isConfigOption = (o, type, multi) => isConfigOptionOfType(o, type, multi) &&
undefOrType(o.short, 'string') &&
undefOrType(o.description, 'string') &&
undefOrType(o.hint, 'string') &&
undefOrType(o.validate, 'function') &&
(o.type === 'boolean' ?
o.validOptions === undefined
: undefOrTypeArray(o.validOptions, o.type)) &&
(o.default === undefined || isValidValue(o.default, type, multi));
const isHeading = (r) => r.type === 'heading';
const isDescription = (r) => r.type === 'description';
const width = Math.min(process?.stdout?.columns ?? 80, 80);
// indentation spaces from heading level
const indent = (n) => (n - 1) * 2;
const toEnvKey = (pref, key) => [pref, key.replace(/[^a-zA-Z0-9]+/g, ' ')]
.join(' ')
.trim()
.toUpperCase()
.replace(/ /g, '_');
const toEnvVal = (value, delim = '\n') => {
const str = typeof value === 'string' ? value
: typeof value === 'boolean' ?
value ? '1'
: '0'
: typeof value === 'number' ? String(value)
: Array.isArray(value) ?
value.map((v) => toEnvVal(v)).join(delim)
: /* c8 ignore start */ undefined;
if (typeof str !== 'string') {
throw new Error(`could not serialize value to environment: ${JSON.stringify(value)}`, { cause: { code: 'JACKSPEAK' } });
}
/* c8 ignore stop */
return str;
};
const fromEnvVal = (env, type, multiple, delim = '\n') => (multiple ?
env ? env.split(delim).map(v => fromEnvVal(v, type, false))
: []
: type === 'string' ? env
: type === 'boolean' ? env === '1'
: +env.trim());
const undefOrType = (v, t) => v === undefined || typeof v === t;
const undefOrTypeArray = (v, t) => v === undefined || (Array.isArray(v) && v.every(x => typeof x === t));
// print the value type, for error message reporting
const valueType = (v) => typeof v === 'string' ? 'string'
: typeof v === 'boolean' ? 'boolean'
: typeof v === 'number' ? 'number'
: Array.isArray(v) ?
`${joinTypes([...new Set(v.map(v => valueType(v)))])}[]`
: `${v.type}${v.multiple ? '[]' : ''}`;
const joinTypes = (types) => types.length === 1 && typeof types[0] === 'string' ?
types[0]
: `(${types.join('|')})`;
const validateFieldMeta = (field, fieldMeta) => {
if (fieldMeta) {
if (field.type !== undefined && field.type !== fieldMeta.type) {
throw new TypeError(`invalid type`, {
cause: {
found: field.type,
wanted: [fieldMeta.type, undefined],
},
});
}
if (field.multiple !== undefined &&
!!field.multiple !== fieldMeta.multiple) {
throw new TypeError(`invalid multiple`, {
cause: {
found: field.multiple,
wanted: [fieldMeta.multiple, undefined],
},
});
}
return fieldMeta;
}
if (!isConfigType(field.type)) {
throw new TypeError(`invalid type`, {
cause: {
found: field.type,
wanted: ['string', 'number', 'boolean'],
},
});
}
return {
type: field.type,
multiple: !!field.multiple,
};
};
const validateField = (o, type, multiple) => {
const validateValidOptions = (def, validOptions) => {
if (!undefOrTypeArray(validOptions, type)) {
throw new TypeError('invalid validOptions', {
cause: {
found: validOptions,
wanted: valueType({ type, multiple: true }),
},
});
}
if (def !== undefined && validOptions !== undefined) {
const valid = Array.isArray(def) ?
def.every(v => validOptions.includes(v))
: validOptions.includes(def);
if (!valid) {
throw new TypeError('invalid default value not in validOptions', {
cause: {
found: def,
wanted: validOptions,
},
});
}
}
};
if (o.default !== undefined &&
!isValidValue(o.default, type, multiple)) {
throw new TypeError('invalid default value', {
cause: {
found: o.default,
wanted: valueType({ type, multiple }),
},
});
}
if (isConfigOptionOfType(o, 'number', false) ||
isConfigOptionOfType(o, 'number', true)) {
validateValidOptions(o.default, o.validOptions);
}
else if (isConfigOptionOfType(o, 'string', false) ||
isConfigOptionOfType(o, 'string', true)) {
validateValidOptions(o.default, o.validOptions);
}
else if (isConfigOptionOfType(o, 'boolean', false) ||
isConfigOptionOfType(o, 'boolean', true)) {
if (o.hint !== undefined) {
throw new TypeError('cannot provide hint for flag');
}
if (o.validOptions !== undefined) {
throw new TypeError('cannot provide validOptions for flag');
}
}
return o;
};
const toParseArgsOptionsConfig = (options) => {
return Object.entries(options).reduce((acc, [longOption, o]) => {
const p = {
type: 'string',
multiple: !!o.multiple,
...(typeof o.short === 'string' ? { short: o.short } : undefined),
};
const setNoBool = () => {
if (!longOption.startsWith('no-') && !options[`no-${longOption}`]) {
acc[`no-${longOption}`] = {
type: 'boolean',
multiple: !!o.multiple,
};
}
};
const setDefault = (def, fn) => {
if (def !== undefined) {
p.default = fn(def);
}
};
if (isConfigOption(o, 'number', false)) {
setDefault(o.default, String);
}
else if (isConfigOption(o, 'number', true)) {
setDefault(o.default, d => d.map(v => String(v)));
}
else if (isConfigOption(o, 'string', false) ||
isConfigOption(o, 'string', true)) {
setDefault(o.default, v => v);
}
else if (isConfigOption(o, 'boolean', false) ||
isConfigOption(o, 'boolean', true)) {
p.type = 'boolean';
setDefault(o.default, v => v);
setNoBool();
}
acc[longOption] = p;
return acc;
}, {});
};
/**
* Class returned by the {@link jack} function and all configuration
* definition methods. This is what gets chained together.
*/
export class Jack {
#configSet;
#shorts;
#options;
#fields = [];
#env;
#envPrefix;
#allowPositionals;
#usage;
#usageMarkdown;
constructor(options = {}) {
this.#options = options;
this.#allowPositionals = options.allowPositionals !== false;
this.#env =
this.#options.env === undefined ? process.env : this.#options.env;
this.#envPrefix = options.envPrefix;
// We need to fib a little, because it's always the same object, but it
// starts out as having an empty config set. Then each method that adds
// fields returns `this as Jack<C & { ...newConfigs }>`
this.#configSet = Object.create(null);
this.#shorts = Object.create(null);
}
/**
* Resulting definitions, suitable to be passed to Node's `util.parseArgs`,
* but also including `description` and `short` fields, if set.
*/
get definitions() {
return this.#configSet;
}
/** map of `{ <short>: <long> }` strings for each short name defined */
get shorts() {
return this.#shorts;
}
/**
* options passed to the {@link Jack} constructor
*/
get jackOptions() {
return this.#options;
}
/**
* the data used to generate {@link Jack#usage} and
* {@link Jack#usageMarkdown} content.
*/
get usageFields() {
return this.#fields;
}
/**
* Set the default value (which will still be overridden by env or cli)
* as if from a parsed config file. The optional `source` param, if
* provided, will be included in error messages if a value is invalid or
* unknown.
*/
setConfigValues(values, source = '') {
try {
this.validate(values);
}
catch (er) {
if (source && er instanceof Error) {
/* c8 ignore next */
const cause = typeof er.cause === 'object' ? er.cause : {};
er.cause = { ...cause, path: source };
Error.captureStackTrace(er, this.setConfigValues);
}
throw er;
}
for (const [field, value] of Object.entries(values)) {
const my = this.#configSet[field];
// already validated, just for TS's benefit
/* c8 ignore start */
if (!my) {
throw new Error('unexpected field in config set: ' + field, {
cause: {
code: 'JACKSPEAK',
found: field,
},
});
}
/* c8 ignore stop */
my.default = value;
}
return this;
}
/**
* Parse a string of arguments, and return the resulting
* `{ values, positionals }` object.
*
* If an {@link JackOptions#envPrefix} is set, then it will read default
* values from the environment, and write the resulting values back
* to the environment as well.
*
* Environment values always take precedence over any other value, except
* an explicit CLI setting.
*/
parse(args = process.argv) {
this.loadEnvDefaults();
const p = this.parseRaw(args);
this.applyDefaults(p);
this.writeEnv(p);
return p;
}
loadEnvDefaults() {
if (this.#envPrefix) {
for (const [field, my] of Object.entries(this.#configSet)) {
const ek = toEnvKey(this.#envPrefix, field);
const env = this.#env[ek];
if (env !== undefined) {
my.default = fromEnvVal(env, my.type, !!my.multiple, my.delim);
}
}
}
}
applyDefaults(p) {
for (const [field, c] of Object.entries(this.#configSet)) {
if (c.default !== undefined && !(field in p.values)) {
//@ts-ignore
p.values[field] = c.default;
}
}
}
/**
* Only parse the command line arguments passed in.
* Does not strip off the `node script.js` bits, so it must be just the
* arguments you wish to have parsed.
* Does not read from or write to the environment, or set defaults.
*/
parseRaw(args) {
if (args === process.argv) {
args = args.slice(process._eval !== undefined ? 1 : 2);
}
const result = parseArgs({
args,
options: toParseArgsOptionsConfig(this.#configSet),
// always strict, but using our own logic
strict: false,
allowPositionals: this.#allowPositionals,
tokens: true,
});
const p = {
values: {},
positionals: [],
};
for (const token of result.tokens) {
if (token.kind === 'positional') {
p.positionals.push(token.value);
if (this.#options.stopAtPositional ||
this.#options.stopAtPositionalTest?.(token.value)) {
p.positionals.push(...args.slice(token.index + 1));
break;
}
}
else if (token.kind === 'option') {
let value = undefined;
if (token.name.startsWith('no-')) {
const my = this.#configSet[token.name];
const pname = token.name.substring('no-'.length);
const pos = this.#configSet[pname];
if (pos &&
pos.type === 'boolean' &&
(!my ||
(my.type === 'boolean' && !!my.multiple === !!pos.multiple))) {
value = false;
token.name = pname;
}
}
const my = this.#configSet[token.name];
if (!my) {
throw new Error(`Unknown option '${token.rawName}'. ` +
`To specify a positional argument starting with a '-', ` +
`place it at the end of the command after '--', as in ` +
`'-- ${token.rawName}'`, {
cause: {
code: 'JACKSPEAK',
found: token.rawName + (token.value ? `=${token.value}` : ''),
},
});
}
if (value === undefined) {
if (token.value === undefined) {
if (my.type !== 'boolean') {
throw new Error(`No value provided for ${token.rawName}, expected ${my.type}`, {
cause: {
code: 'JACKSPEAK',
name: token.rawName,
wanted: valueType(my),
},
});
}
value = true;
}
else {
if (my.type === 'boolean') {
throw new Error(`Flag ${token.rawName} does not take a value, received '${token.value}'`, { cause: { code: 'JACKSPEAK', found: token } });
}
if (my.type === 'string') {
value = token.value;
}
else {
value = +token.value;
if (value !== value) {
throw new Error(`Invalid value '${token.value}' provided for ` +
`'${token.rawName}' option, expected number`, {
cause: {
code: 'JACKSPEAK',
name: token.rawName,
found: token.value,
wanted: 'number',
},
});
}
}
}
}
if (my.multiple) {
const pv = p.values;
const tn = pv[token.name] ?? [];
pv[token.name] = tn;
tn.push(value);
}
else {
const pv = p.values;
pv[token.name] = value;
}
}
}
for (const [field, value] of Object.entries(p.values)) {
const valid = this.#configSet[field]?.validate;
const validOptions = this.#configSet[field]?.validOptions;
const cause = validOptions && !isValidOption(value, validOptions) ?
{ name: field, found: value, validOptions }
: valid && !valid(value) ? { name: field, found: value }
: undefined;
if (cause) {
throw new Error(`Invalid value provided for --${field}: ${JSON.stringify(value)}`, { cause: { ...cause, code: 'JACKSPEAK' } });
}
}
return p;
}
/**
* do not set fields as 'no-foo' if 'foo' exists and both are bools
* just set foo.
*/
#noNoFields(f, val, s = f) {
if (!f.startsWith('no-') || typeof val !== 'boolean')
return;
const yes = f.substring('no-'.length);
// recurse so we get the core config key we care about.
this.#noNoFields(yes, val, s);
if (this.#configSet[yes]?.type === 'boolean') {
throw new Error(`do not set '${s}', instead set '${yes}' as desired.`, { cause: { code: 'JACKSPEAK', found: s, wanted: yes } });
}
}
/**
* 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', {
cause: { code: 'JACKSPEAK', found: o },
});
}
const opts = o;
for (const field in o) {
const value = opts[field];
/* c8 ignore next - for TS */
if (value === undefined)
continue;
this.#noNoFields(field, value);
const config = this.#configSet[field];
if (!config) {
throw new Error(`Unknown config option: ${field}`, {
cause: { code: 'JACKSPEAK', found: field },
});
}
if (!isValidValue(value, config.type, !!config.multiple)) {
throw new Error(`Invalid value ${valueType(value)} for ${field}, expected ${valueType(config)}`, {
cause: {
code: 'JACKSPEAK',
name: field,
found: value,
wanted: valueType(config),
},
});
}
const cause = config.validOptions && !isValidOption(value, config.validOptions) ?
{ name: field, found: value, validOptions: config.validOptions }
: config.validate && !config.validate(value) ?
{ name: field, found: value }
: undefined;
if (cause) {
throw new Error(`Invalid config value for ${field}: ${JSON.stringify(value)}`, {
cause: { ...cause, code: 'JACKSPEAK' },
});
}
}
}
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, { pre = false } = {}) {
if (level === undefined) {
level = this.#fields.some(r => isHeading(r)) ? 2 : 1;
}
this.#fields.push({ type: 'heading', text, level, pre });
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.#addFieldsWith(fields, 'number', false);
}
/**
* Add one or more multiple number fields.
*/
numList(fields) {
return this.#addFieldsWith(fields, 'number', true);
}
/**
* Add one or more string option fields.
*/
opt(fields) {
return this.#addFieldsWith(fields, 'string', false);
}
/**
* Add one or more multiple string option fields.
*/
optList(fields) {
return this.#addFieldsWith(fields, 'string', true);
}
/**
* Add one or more flag fields.
*/
flag(fields) {
return this.#addFieldsWith(fields, 'boolean', false);
}
/**
* Add one or more multiple flag fields.
*/
flagList(fields) {
return this.#addFieldsWith(fields, 'boolean', true);
}
/**
* 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) {
return this.#addFields(this, fields);
}
#addFieldsWith(fields, type, multiple) {
return this.#addFields(this, fields, {
type,
multiple,
});
}
#addFields(next, fields, opt) {
Object.assign(next.#configSet, Object.fromEntries(Object.entries(fields).map(([name, field]) => {
this.#validateName(name, field);
const { type, multiple } = validateFieldMeta(field, opt);
const value = { ...field, type, multiple };
validateField(value, type, multiple);
next.#fields.push({ type: 'config', name, value });
return [name, value];
})));
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 ${name}`);
}
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 ${this.#shorts[field.short]}`);
}
this.#shorts[field.short] = name;
this.#shorts[name] = name;
}
}
/**
* Return the usage banner for the given configuration
*/
usage() {
if (this.#usage)
return this.#usage;
let headingLevel = 1;
//@ts-ignore
const ui = cliui({ width });
const first = this.#fields[0];
let start = first?.type === 'heading' ? 1 : 0;
if (first?.type === 'heading') {
ui.div({
padding: [0, 0, 0, 0],
text: normalize(first.text),
});
}
ui.div({ padding: [0, 0, 0, 0], text: 'Usage:' });
if (this.#options.usage) {
ui.div({
text: this.#options.usage,
padding: [0, 0, 0, 2],
});
}
else {
const cmd = basename(String(process.argv[1]));
const shortFlags = [];
const shorts = [];
const flags = [];
const opts = [];
for (const [field, config] of Object.entries(this.#configSet)) {
if (config.short) {
if (config.type === 'boolean')
shortFlags.push(config.short);
else
shorts.push([config.short, config.hint || field]);
}
else {
if (config.type === 'boolean')
flags.push(field);
else
opts.push([field, config.hint || field]);
}
}
const sf = shortFlags.length ? ' -' + shortFlags.join('') : '';
const so = shorts.map(([k, v]) => ` --${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 (maybeDesc && 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: '' });
}
const { rows, maxWidth } = this.#usageRows(start);
// 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 - 3) {
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 usage banner markdown for the given configuration
*/
usageMarkdown() {
if (this.#usageMarkdown)
return this.#usageMarkdown;
const out = [];
let headingLevel = 1;
const first = this.#fields[0];
let start = first?.type === 'heading' ? 1 : 0;
if (first?.type === 'heading') {
out.push(`# ${normalizeOneLine(first.text)}`);
}
out.push('Usage:');
if (this.#options.usage) {
out.push(normalizeMarkdown(this.#options.usage, true));
}
else {
const cmd = basename(String(process.argv[1]));
const shortFlags = [];
const shorts = [];
const flags = [];
const opts = [];
for (const [field, config] of Object.entries(this.#configSet)) {
if (config.short) {
if (config.type === 'boolean')
shortFlags.push(config.short);
else
shorts.push([config.short, config.hint || field]);
}
else {
if (config.type === 'boolean')
flags.push(field);
else
opts.push([field, config.hint || field]);
}
}
const sf = shortFlags.length ? ' -' + shortFlags.join('') : '';
const so = shorts.map(([k, v]) => ` --${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}${lo}`.trim();
out.push(normalizeMarkdown(usage, true));
}
const maybeDesc = this.#fields[start];
if (maybeDesc && isDescription(maybeDesc)) {
out.push(normalizeMarkdown(maybeDesc.text, maybeDesc.pre));
start++;
}
const { rows } = this.#usageRows(start);
// heading level in markdown is number of # ahead of text
for (const row of rows) {
if (row.left) {
out.push('#'.repeat(headingLevel + 1) +
' ' +
normalizeOneLine(row.left, true));
if (row.text)
out.push(normalizeMarkdown(row.text));
}
else if (isHeading(row)) {
const { level } = row;
headingLevel = level;
out.push(`${'#'.repeat(headingLevel)} ${normalizeOneLine(row.text, row.pre)}`);
}
else {
out.push(normalizeMarkdown(row.text, !!row.pre));
}
}
return (this.#usageMarkdown = out.join('\n\n') + '\n');
}
#usageRows(start) {
// turn each config type into a row, and figure out the width of the
// left hand indentation for the option descriptions.
const maxMax = Math.max(12, Math.min(26, Math.floor(width / 3)));
let maxWidth = 8;
let prev = undefined;
const rows = [];
for (const field of this.#fields.slice(start)) {
if (field.type !== 'config') {
if (prev?.type === 'config')
prev.skipLine = true;
prev = undefined;
field.text = normalize(field.text, !!field.pre);
rows.push(field);
continue;
}
const { value } = field;
const desc = value.description || '';
const mult = value.multiple ? 'Can be set multiple times' : '';
const opts = value.validOptions?.length ?
'Valid options: ' +
value.validOptions.map(v => JSON.stringify(v)).join(', ')
: '';
const dmDelim = desc.includes('\n') ? '\n\n' : '\n';
const extra = [opts, mult].join(dmDelim).trim();
const text = (normalize(desc) + dmDelim + extra).trim();
const hint = value.hint ||
(value.type === 'number' ? 'n'
: value.type === 'string' ? field.name
: undefined);
const short = !value.short ? ''
: value.type === 'boolean' ? `-${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);
}
return { rows, maxWidth };
}
/**
* 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: normalize(def.description) }
: {}),
...(def.validate ? { validate: def.validate } : {}),
...(def.validOptions ? { validOptions: def.validOptions } : {}),
...(def.default !== undefined ? { default: def.default } : {}),
...(def.hint ? { hint: def.hint } : {}),
},
]));
}
/**
* Custom printer for `util.inspect`
*/
[inspect.custom](_, options) {
return `Jack ${inspect(this.toJSON(), options)}`;
}
}
/**
* Main entry point. Create and return a {@link Jack} object.
*/
export const jack = (options = {}) => new Jack(options);
// Unwrap and un-indent, so we can wrap description
// strings however makes them look nice in the code.
const normalize = (s, pre = false) => {
if (pre)
// prepend a ZWSP to each line so cliui doesn't strip it.
return s
.split('\n')
.map(l => `\u200b${l}`)
.join('\n');
return s
.split(/^\s*```\s*$/gm)
.map((s, i) => {
if (i % 2 === 1) {
if (!s.trim()) {
return `\`\`\`\n\`\`\`\n`;
}
// outdent the ``` blocks, but preserve whitespace otherwise.
const split = s.split('\n');
// throw out the \n at the start and end
split.pop();
split.shift();
const si = split.reduce((shortest, l) => {
/* c8 ignore next */
const ind = l.match(/^\s*/)?.[0] ?? '';
if (ind.length)
return Math.min(ind.length, shortest);
else
return shortest;
}, Infinity);
/* c8 ignore next */
const i = isFinite(si) ? si : 0;
return ('\n```\n' +
split.map(s => `\u200b${s.substring(i)}`).join('\n') +
'\n```\n');
}
return (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 $2')
// two line breaks are enough
.replace(/\n{3,}/g, '\n\n')
// remove any spaces at the start of a line
.replace(/\n[ \t]+/g, '\n')
.trim());
})
.join('\n');
};
// normalize for markdown printing, remove leading spaces on lines
const normalizeMarkdown = (s, pre = false) => {
const n = normalize(s, pre).replace(/\\/g, '\\\\');
return pre ?
`\`\`\`\n${n.replace(/\u200b/g, '')}\n\`\`\``
: n.replace(/\n +/g, '\n').trim();
};
const normalizeOneLine = (s, pre = false) => {
const n = normalize(s, pre)
.replace(/[\s\u200b]+/g, ' ')
.trim();
return pre ? `\`${n}\`` : n;
};
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{
"type": "module"
}