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Copyright (c) 2015, Contributors
Permission to use, copy, modify, and/or distribute this software
for any purpose with or without fee is hereby granted, provided
that the above copyright notice and this permission notice
appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE
LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES
OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

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# @isaacs/cliui
Temporary fork of [cliui](http://npm.im/cliui).
![ci](https://github.com/yargs/cliui/workflows/ci/badge.svg)
[![NPM version](https://img.shields.io/npm/v/cliui.svg)](https://www.npmjs.com/package/cliui)
[![Conventional Commits](https://img.shields.io/badge/Conventional%20Commits-1.0.0-yellow.svg)](https://conventionalcommits.org)
![nycrc config on GitHub](https://img.shields.io/nycrc/yargs/cliui)
easily create complex multi-column command-line-interfaces.
## Example
```js
const ui = require('cliui')()
ui.div('Usage: $0 [command] [options]')
ui.div({
text: 'Options:',
padding: [2, 0, 1, 0]
})
ui.div(
{
text: "-f, --file",
width: 20,
padding: [0, 4, 0, 4]
},
{
text: "the file to load." +
chalk.green("(if this description is long it wraps).")
,
width: 20
},
{
text: chalk.red("[required]"),
align: 'right'
}
)
console.log(ui.toString())
```
## Deno/ESM Support
As of `v7` `cliui` supports [Deno](https://github.com/denoland/deno) and
[ESM](https://nodejs.org/api/esm.html#esm_ecmascript_modules):
```typescript
import cliui from "https://deno.land/x/cliui/deno.ts";
const ui = cliui({})
ui.div('Usage: $0 [command] [options]')
ui.div({
text: 'Options:',
padding: [2, 0, 1, 0]
})
ui.div({
text: "-f, --file",
width: 20,
padding: [0, 4, 0, 4]
})
console.log(ui.toString())
```
<img width="500" src="screenshot.png">
## Layout DSL
cliui exposes a simple layout DSL:
If you create a single `ui.div`, passing a string rather than an
object:
* `\n`: characters will be interpreted as new rows.
* `\t`: characters will be interpreted as new columns.
* `\s`: characters will be interpreted as padding.
**as an example...**
```js
var ui = require('./')({
width: 60
})
ui.div(
'Usage: node ./bin/foo.js\n' +
' <regex>\t provide a regex\n' +
' <glob>\t provide a glob\t [required]'
)
console.log(ui.toString())
```
**will output:**
```shell
Usage: node ./bin/foo.js
<regex> provide a regex
<glob> provide a glob [required]
```
## Methods
```js
cliui = require('cliui')
```
### cliui({width: integer})
Specify the maximum width of the UI being generated.
If no width is provided, cliui will try to get the current window's width and use it, and if that doesn't work, width will be set to `80`.
### cliui({wrap: boolean})
Enable or disable the wrapping of text in a column.
### cliui.div(column, column, column)
Create a row with any number of columns, a column
can either be a string, or an object with the following
options:
* **text:** some text to place in the column.
* **width:** the width of a column.
* **align:** alignment, `right` or `center`.
* **padding:** `[top, right, bottom, left]`.
* **border:** should a border be placed around the div?
### cliui.span(column, column, column)
Similar to `div`, except the next row will be appended without
a new line being created.
### cliui.resetOutput()
Resets the UI elements of the current cliui instance, maintaining the values
set for `width` and `wrap`.

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'use strict';
const align = {
right: alignRight,
center: alignCenter
};
const top = 0;
const right = 1;
const bottom = 2;
const left = 3;
class UI {
constructor(opts) {
var _a;
this.width = opts.width;
/* c8 ignore start */
this.wrap = (_a = opts.wrap) !== null && _a !== void 0 ? _a : true;
/* c8 ignore stop */
this.rows = [];
}
span(...args) {
const cols = this.div(...args);
cols.span = true;
}
resetOutput() {
this.rows = [];
}
div(...args) {
if (args.length === 0) {
this.div('');
}
if (this.wrap && this.shouldApplyLayoutDSL(...args) && typeof args[0] === 'string') {
return this.applyLayoutDSL(args[0]);
}
const cols = args.map(arg => {
if (typeof arg === 'string') {
return this.colFromString(arg);
}
return arg;
});
this.rows.push(cols);
return cols;
}
shouldApplyLayoutDSL(...args) {
return args.length === 1 && typeof args[0] === 'string' &&
/[\t\n]/.test(args[0]);
}
applyLayoutDSL(str) {
const rows = str.split('\n').map(row => row.split('\t'));
let leftColumnWidth = 0;
// simple heuristic for layout, make sure the
// second column lines up along the left-hand.
// don't allow the first column to take up more
// than 50% of the screen.
rows.forEach(columns => {
if (columns.length > 1 && mixin.stringWidth(columns[0]) > leftColumnWidth) {
leftColumnWidth = Math.min(Math.floor(this.width * 0.5), mixin.stringWidth(columns[0]));
}
});
// generate a table:
// replacing ' ' with padding calculations.
// using the algorithmically generated width.
rows.forEach(columns => {
this.div(...columns.map((r, i) => {
return {
text: r.trim(),
padding: this.measurePadding(r),
width: (i === 0 && columns.length > 1) ? leftColumnWidth : undefined
};
}));
});
return this.rows[this.rows.length - 1];
}
colFromString(text) {
return {
text,
padding: this.measurePadding(text)
};
}
measurePadding(str) {
// measure padding without ansi escape codes
const noAnsi = mixin.stripAnsi(str);
return [0, noAnsi.match(/\s*$/)[0].length, 0, noAnsi.match(/^\s*/)[0].length];
}
toString() {
const lines = [];
this.rows.forEach(row => {
this.rowToString(row, lines);
});
// don't display any lines with the
// hidden flag set.
return lines
.filter(line => !line.hidden)
.map(line => line.text)
.join('\n');
}
rowToString(row, lines) {
this.rasterize(row).forEach((rrow, r) => {
let str = '';
rrow.forEach((col, c) => {
const { width } = row[c]; // the width with padding.
const wrapWidth = this.negatePadding(row[c]); // the width without padding.
let ts = col; // temporary string used during alignment/padding.
if (wrapWidth > mixin.stringWidth(col)) {
ts += ' '.repeat(wrapWidth - mixin.stringWidth(col));
}
// align the string within its column.
if (row[c].align && row[c].align !== 'left' && this.wrap) {
const fn = align[row[c].align];
ts = fn(ts, wrapWidth);
if (mixin.stringWidth(ts) < wrapWidth) {
/* c8 ignore start */
const w = width || 0;
/* c8 ignore stop */
ts += ' '.repeat(w - mixin.stringWidth(ts) - 1);
}
}
// apply border and padding to string.
const padding = row[c].padding || [0, 0, 0, 0];
if (padding[left]) {
str += ' '.repeat(padding[left]);
}
str += addBorder(row[c], ts, '| ');
str += ts;
str += addBorder(row[c], ts, ' |');
if (padding[right]) {
str += ' '.repeat(padding[right]);
}
// if prior row is span, try to render the
// current row on the prior line.
if (r === 0 && lines.length > 0) {
str = this.renderInline(str, lines[lines.length - 1]);
}
});
// remove trailing whitespace.
lines.push({
text: str.replace(/ +$/, ''),
span: row.span
});
});
return lines;
}
// if the full 'source' can render in
// the target line, do so.
renderInline(source, previousLine) {
const match = source.match(/^ */);
/* c8 ignore start */
const leadingWhitespace = match ? match[0].length : 0;
/* c8 ignore stop */
const target = previousLine.text;
const targetTextWidth = mixin.stringWidth(target.trimEnd());
if (!previousLine.span) {
return source;
}
// if we're not applying wrapping logic,
// just always append to the span.
if (!this.wrap) {
previousLine.hidden = true;
return target + source;
}
if (leadingWhitespace < targetTextWidth) {
return source;
}
previousLine.hidden = true;
return target.trimEnd() + ' '.repeat(leadingWhitespace - targetTextWidth) + source.trimStart();
}
rasterize(row) {
const rrows = [];
const widths = this.columnWidths(row);
let wrapped;
// word wrap all columns, and create
// a data-structure that is easy to rasterize.
row.forEach((col, c) => {
// leave room for left and right padding.
col.width = widths[c];
if (this.wrap) {
wrapped = mixin.wrap(col.text, this.negatePadding(col), { hard: true }).split('\n');
}
else {
wrapped = col.text.split('\n');
}
if (col.border) {
wrapped.unshift('.' + '-'.repeat(this.negatePadding(col) + 2) + '.');
wrapped.push("'" + '-'.repeat(this.negatePadding(col) + 2) + "'");
}
// add top and bottom padding.
if (col.padding) {
wrapped.unshift(...new Array(col.padding[top] || 0).fill(''));
wrapped.push(...new Array(col.padding[bottom] || 0).fill(''));
}
wrapped.forEach((str, r) => {
if (!rrows[r]) {
rrows.push([]);
}
const rrow = rrows[r];
for (let i = 0; i < c; i++) {
if (rrow[i] === undefined) {
rrow.push('');
}
}
rrow.push(str);
});
});
return rrows;
}
negatePadding(col) {
/* c8 ignore start */
let wrapWidth = col.width || 0;
/* c8 ignore stop */
if (col.padding) {
wrapWidth -= (col.padding[left] || 0) + (col.padding[right] || 0);
}
if (col.border) {
wrapWidth -= 4;
}
return wrapWidth;
}
columnWidths(row) {
if (!this.wrap) {
return row.map(col => {
return col.width || mixin.stringWidth(col.text);
});
}
let unset = row.length;
let remainingWidth = this.width;
// column widths can be set in config.
const widths = row.map(col => {
if (col.width) {
unset--;
remainingWidth -= col.width;
return col.width;
}
return undefined;
});
// any unset widths should be calculated.
/* c8 ignore start */
const unsetWidth = unset ? Math.floor(remainingWidth / unset) : 0;
/* c8 ignore stop */
return widths.map((w, i) => {
if (w === undefined) {
return Math.max(unsetWidth, _minWidth(row[i]));
}
return w;
});
}
}
function addBorder(col, ts, style) {
if (col.border) {
if (/[.']-+[.']/.test(ts)) {
return '';
}
if (ts.trim().length !== 0) {
return style;
}
return ' ';
}
return '';
}
// calculates the minimum width of
// a column, based on padding preferences.
function _minWidth(col) {
const padding = col.padding || [];
const minWidth = 1 + (padding[left] || 0) + (padding[right] || 0);
if (col.border) {
return minWidth + 4;
}
return minWidth;
}
function getWindowWidth() {
/* c8 ignore start */
if (typeof process === 'object' && process.stdout && process.stdout.columns) {
return process.stdout.columns;
}
return 80;
}
/* c8 ignore stop */
function alignRight(str, width) {
str = str.trim();
const strWidth = mixin.stringWidth(str);
if (strWidth < width) {
return ' '.repeat(width - strWidth) + str;
}
return str;
}
function alignCenter(str, width) {
str = str.trim();
const strWidth = mixin.stringWidth(str);
/* c8 ignore start */
if (strWidth >= width) {
return str;
}
/* c8 ignore stop */
return ' '.repeat((width - strWidth) >> 1) + str;
}
let mixin;
function cliui(opts, _mixin) {
mixin = _mixin;
return new UI({
/* c8 ignore start */
width: (opts === null || opts === void 0 ? void 0 : opts.width) || getWindowWidth(),
wrap: opts === null || opts === void 0 ? void 0 : opts.wrap
/* c8 ignore stop */
});
}
// Bootstrap cliui with CommonJS dependencies:
const stringWidth = require('string-width-cjs');
const stripAnsi = require('strip-ansi-cjs');
const wrap = require('wrap-ansi-cjs');
function ui(opts) {
return cliui(opts, {
stringWidth,
stripAnsi,
wrap
});
}
module.exports = ui;

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interface UIOptions {
width: number;
wrap?: boolean;
rows?: string[];
}
interface Column {
text: string;
width?: number;
align?: "right" | "left" | "center";
padding: number[];
border?: boolean;
}
interface ColumnArray extends Array<Column> {
span: boolean;
}
interface Line {
hidden?: boolean;
text: string;
span?: boolean;
}
declare class UI {
width: number;
wrap: boolean;
rows: ColumnArray[];
constructor(opts: UIOptions);
span(...args: ColumnArray): void;
resetOutput(): void;
div(...args: (Column | string)[]): ColumnArray;
private shouldApplyLayoutDSL;
private applyLayoutDSL;
private colFromString;
private measurePadding;
toString(): string;
rowToString(row: ColumnArray, lines: Line[]): Line[];
// if the full 'source' can render in
// the target line, do so.
private renderInline;
private rasterize;
private negatePadding;
private columnWidths;
}
declare function ui(opts: UIOptions): UI;
export { ui as default };

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'use strict';
const align = {
right: alignRight,
center: alignCenter
};
const top = 0;
const right = 1;
const bottom = 2;
const left = 3;
export class UI {
constructor(opts) {
var _a;
this.width = opts.width;
/* c8 ignore start */
this.wrap = (_a = opts.wrap) !== null && _a !== void 0 ? _a : true;
/* c8 ignore stop */
this.rows = [];
}
span(...args) {
const cols = this.div(...args);
cols.span = true;
}
resetOutput() {
this.rows = [];
}
div(...args) {
if (args.length === 0) {
this.div('');
}
if (this.wrap && this.shouldApplyLayoutDSL(...args) && typeof args[0] === 'string') {
return this.applyLayoutDSL(args[0]);
}
const cols = args.map(arg => {
if (typeof arg === 'string') {
return this.colFromString(arg);
}
return arg;
});
this.rows.push(cols);
return cols;
}
shouldApplyLayoutDSL(...args) {
return args.length === 1 && typeof args[0] === 'string' &&
/[\t\n]/.test(args[0]);
}
applyLayoutDSL(str) {
const rows = str.split('\n').map(row => row.split('\t'));
let leftColumnWidth = 0;
// simple heuristic for layout, make sure the
// second column lines up along the left-hand.
// don't allow the first column to take up more
// than 50% of the screen.
rows.forEach(columns => {
if (columns.length > 1 && mixin.stringWidth(columns[0]) > leftColumnWidth) {
leftColumnWidth = Math.min(Math.floor(this.width * 0.5), mixin.stringWidth(columns[0]));
}
});
// generate a table:
// replacing ' ' with padding calculations.
// using the algorithmically generated width.
rows.forEach(columns => {
this.div(...columns.map((r, i) => {
return {
text: r.trim(),
padding: this.measurePadding(r),
width: (i === 0 && columns.length > 1) ? leftColumnWidth : undefined
};
}));
});
return this.rows[this.rows.length - 1];
}
colFromString(text) {
return {
text,
padding: this.measurePadding(text)
};
}
measurePadding(str) {
// measure padding without ansi escape codes
const noAnsi = mixin.stripAnsi(str);
return [0, noAnsi.match(/\s*$/)[0].length, 0, noAnsi.match(/^\s*/)[0].length];
}
toString() {
const lines = [];
this.rows.forEach(row => {
this.rowToString(row, lines);
});
// don't display any lines with the
// hidden flag set.
return lines
.filter(line => !line.hidden)
.map(line => line.text)
.join('\n');
}
rowToString(row, lines) {
this.rasterize(row).forEach((rrow, r) => {
let str = '';
rrow.forEach((col, c) => {
const { width } = row[c]; // the width with padding.
const wrapWidth = this.negatePadding(row[c]); // the width without padding.
let ts = col; // temporary string used during alignment/padding.
if (wrapWidth > mixin.stringWidth(col)) {
ts += ' '.repeat(wrapWidth - mixin.stringWidth(col));
}
// align the string within its column.
if (row[c].align && row[c].align !== 'left' && this.wrap) {
const fn = align[row[c].align];
ts = fn(ts, wrapWidth);
if (mixin.stringWidth(ts) < wrapWidth) {
/* c8 ignore start */
const w = width || 0;
/* c8 ignore stop */
ts += ' '.repeat(w - mixin.stringWidth(ts) - 1);
}
}
// apply border and padding to string.
const padding = row[c].padding || [0, 0, 0, 0];
if (padding[left]) {
str += ' '.repeat(padding[left]);
}
str += addBorder(row[c], ts, '| ');
str += ts;
str += addBorder(row[c], ts, ' |');
if (padding[right]) {
str += ' '.repeat(padding[right]);
}
// if prior row is span, try to render the
// current row on the prior line.
if (r === 0 && lines.length > 0) {
str = this.renderInline(str, lines[lines.length - 1]);
}
});
// remove trailing whitespace.
lines.push({
text: str.replace(/ +$/, ''),
span: row.span
});
});
return lines;
}
// if the full 'source' can render in
// the target line, do so.
renderInline(source, previousLine) {
const match = source.match(/^ */);
/* c8 ignore start */
const leadingWhitespace = match ? match[0].length : 0;
/* c8 ignore stop */
const target = previousLine.text;
const targetTextWidth = mixin.stringWidth(target.trimEnd());
if (!previousLine.span) {
return source;
}
// if we're not applying wrapping logic,
// just always append to the span.
if (!this.wrap) {
previousLine.hidden = true;
return target + source;
}
if (leadingWhitespace < targetTextWidth) {
return source;
}
previousLine.hidden = true;
return target.trimEnd() + ' '.repeat(leadingWhitespace - targetTextWidth) + source.trimStart();
}
rasterize(row) {
const rrows = [];
const widths = this.columnWidths(row);
let wrapped;
// word wrap all columns, and create
// a data-structure that is easy to rasterize.
row.forEach((col, c) => {
// leave room for left and right padding.
col.width = widths[c];
if (this.wrap) {
wrapped = mixin.wrap(col.text, this.negatePadding(col), { hard: true }).split('\n');
}
else {
wrapped = col.text.split('\n');
}
if (col.border) {
wrapped.unshift('.' + '-'.repeat(this.negatePadding(col) + 2) + '.');
wrapped.push("'" + '-'.repeat(this.negatePadding(col) + 2) + "'");
}
// add top and bottom padding.
if (col.padding) {
wrapped.unshift(...new Array(col.padding[top] || 0).fill(''));
wrapped.push(...new Array(col.padding[bottom] || 0).fill(''));
}
wrapped.forEach((str, r) => {
if (!rrows[r]) {
rrows.push([]);
}
const rrow = rrows[r];
for (let i = 0; i < c; i++) {
if (rrow[i] === undefined) {
rrow.push('');
}
}
rrow.push(str);
});
});
return rrows;
}
negatePadding(col) {
/* c8 ignore start */
let wrapWidth = col.width || 0;
/* c8 ignore stop */
if (col.padding) {
wrapWidth -= (col.padding[left] || 0) + (col.padding[right] || 0);
}
if (col.border) {
wrapWidth -= 4;
}
return wrapWidth;
}
columnWidths(row) {
if (!this.wrap) {
return row.map(col => {
return col.width || mixin.stringWidth(col.text);
});
}
let unset = row.length;
let remainingWidth = this.width;
// column widths can be set in config.
const widths = row.map(col => {
if (col.width) {
unset--;
remainingWidth -= col.width;
return col.width;
}
return undefined;
});
// any unset widths should be calculated.
/* c8 ignore start */
const unsetWidth = unset ? Math.floor(remainingWidth / unset) : 0;
/* c8 ignore stop */
return widths.map((w, i) => {
if (w === undefined) {
return Math.max(unsetWidth, _minWidth(row[i]));
}
return w;
});
}
}
function addBorder(col, ts, style) {
if (col.border) {
if (/[.']-+[.']/.test(ts)) {
return '';
}
if (ts.trim().length !== 0) {
return style;
}
return ' ';
}
return '';
}
// calculates the minimum width of
// a column, based on padding preferences.
function _minWidth(col) {
const padding = col.padding || [];
const minWidth = 1 + (padding[left] || 0) + (padding[right] || 0);
if (col.border) {
return minWidth + 4;
}
return minWidth;
}
function getWindowWidth() {
/* c8 ignore start */
if (typeof process === 'object' && process.stdout && process.stdout.columns) {
return process.stdout.columns;
}
return 80;
}
/* c8 ignore stop */
function alignRight(str, width) {
str = str.trim();
const strWidth = mixin.stringWidth(str);
if (strWidth < width) {
return ' '.repeat(width - strWidth) + str;
}
return str;
}
function alignCenter(str, width) {
str = str.trim();
const strWidth = mixin.stringWidth(str);
/* c8 ignore start */
if (strWidth >= width) {
return str;
}
/* c8 ignore stop */
return ' '.repeat((width - strWidth) >> 1) + str;
}
let mixin;
export function cliui(opts, _mixin) {
mixin = _mixin;
return new UI({
/* c8 ignore start */
width: (opts === null || opts === void 0 ? void 0 : opts.width) || getWindowWidth(),
wrap: opts === null || opts === void 0 ? void 0 : opts.wrap
/* c8 ignore stop */
});
}

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// Bootstrap cliui with ESM dependencies:
import { cliui } from './build/lib/index.js'
import stringWidth from 'string-width'
import stripAnsi from 'strip-ansi'
import wrap from 'wrap-ansi'
export default function ui (opts) {
return cliui(opts, {
stringWidth,
stripAnsi,
wrap
})
}

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{
"name": "@isaacs/cliui",
"version": "8.0.2",
"description": "easily create complex multi-column command-line-interfaces",
"main": "build/index.cjs",
"exports": {
".": [
{
"import": "./index.mjs",
"require": "./build/index.cjs"
},
"./build/index.cjs"
]
},
"type": "module",
"module": "./index.mjs",
"scripts": {
"check": "standardx '**/*.ts' && standardx '**/*.js' && standardx '**/*.cjs'",
"fix": "standardx --fix '**/*.ts' && standardx --fix '**/*.js' && standardx --fix '**/*.cjs'",
"pretest": "rimraf build && tsc -p tsconfig.test.json && cross-env NODE_ENV=test npm run build:cjs",
"test": "c8 mocha ./test/*.cjs",
"test:esm": "c8 mocha ./test/**/*.mjs",
"postest": "check",
"coverage": "c8 report --check-coverage",
"precompile": "rimraf build",
"compile": "tsc",
"postcompile": "npm run build:cjs",
"build:cjs": "rollup -c",
"prepare": "npm run compile"
},
"repository": "yargs/cliui",
"standard": {
"ignore": [
"**/example/**"
],
"globals": [
"it"
]
},
"keywords": [
"cli",
"command-line",
"layout",
"design",
"console",
"wrap",
"table"
],
"author": "Ben Coe <ben@npmjs.com>",
"license": "ISC",
"dependencies": {
"string-width": "^5.1.2",
"string-width-cjs": "npm:string-width@^4.2.0",
"strip-ansi": "^7.0.1",
"strip-ansi-cjs": "npm:strip-ansi@^6.0.1",
"wrap-ansi": "^8.1.0",
"wrap-ansi-cjs": "npm:wrap-ansi@^7.0.0"
},
"devDependencies": {
"@types/node": "^14.0.27",
"@typescript-eslint/eslint-plugin": "^4.0.0",
"@typescript-eslint/parser": "^4.0.0",
"c8": "^7.3.0",
"chai": "^4.2.0",
"chalk": "^4.1.0",
"cross-env": "^7.0.2",
"eslint": "^7.6.0",
"eslint-plugin-import": "^2.22.0",
"eslint-plugin-node": "^11.1.0",
"gts": "^3.0.0",
"mocha": "^10.0.0",
"rimraf": "^3.0.2",
"rollup": "^2.23.1",
"rollup-plugin-ts": "^3.0.2",
"standardx": "^7.0.0",
"typescript": "^4.0.0"
},
"files": [
"build",
"index.mjs",
"!*.d.ts"
],
"engines": {
"node": ">=12"
}
}

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The ISC License
Copyright (c) Isaac Z. Schlueter and Contributors
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

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# fs-minipass
Filesystem streams based on [minipass](http://npm.im/minipass).
4 classes are exported:
- ReadStream
- ReadStreamSync
- WriteStream
- WriteStreamSync
When using `ReadStreamSync`, all of the data is made available
immediately upon consuming the stream. Nothing is buffered in memory
when the stream is constructed. If the stream is piped to a writer,
then it will synchronously `read()` and emit data into the writer as
fast as the writer can consume it. (That is, it will respect
backpressure.) If you call `stream.read()` then it will read the
entire file and return the contents.
When using `WriteStreamSync`, every write is flushed to the file
synchronously. If your writes all come in a single tick, then it'll
write it all out in a single tick. It's as synchronous as you are.
The async versions work much like their node builtin counterparts,
with the exception of introducing significantly less Stream machinery
overhead.
## USAGE
It's just streams, you pipe them or read() them or write() to them.
```js
import { ReadStream, WriteStream } from 'fs-minipass'
// or: const { ReadStream, WriteStream } = require('fs-minipass')
const readStream = new ReadStream('file.txt')
const writeStream = new WriteStream('output.txt')
writeStream.write('some file header or whatever\n')
readStream.pipe(writeStream)
```
## ReadStream(path, options)
Path string is required, but somewhat irrelevant if an open file
descriptor is passed in as an option.
Options:
- `fd` Pass in a numeric file descriptor, if the file is already open.
- `readSize` The size of reads to do, defaults to 16MB
- `size` The size of the file, if known. Prevents zero-byte read()
call at the end.
- `autoClose` Set to `false` to prevent the file descriptor from being
closed when the file is done being read.
## WriteStream(path, options)
Path string is required, but somewhat irrelevant if an open file
descriptor is passed in as an option.
Options:
- `fd` Pass in a numeric file descriptor, if the file is already open.
- `mode` The mode to create the file with. Defaults to `0o666`.
- `start` The position in the file to start reading. If not
specified, then the file will start writing at position zero, and be
truncated by default.
- `autoClose` Set to `false` to prevent the file descriptor from being
closed when the stream is ended.
- `flags` Flags to use when opening the file. Irrelevant if `fd` is
passed in, since file won't be opened in that case. Defaults to
`'a'` if a `pos` is specified, or `'w'` otherwise.

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/// <reference types="node" />
/// <reference types="node" />
/// <reference types="node" />
import EE from 'events';
import { Minipass } from 'minipass';
declare const _autoClose: unique symbol;
declare const _close: unique symbol;
declare const _ended: unique symbol;
declare const _fd: unique symbol;
declare const _finished: unique symbol;
declare const _flags: unique symbol;
declare const _flush: unique symbol;
declare const _handleChunk: unique symbol;
declare const _makeBuf: unique symbol;
declare const _mode: unique symbol;
declare const _needDrain: unique symbol;
declare const _onerror: unique symbol;
declare const _onopen: unique symbol;
declare const _onread: unique symbol;
declare const _onwrite: unique symbol;
declare const _open: unique symbol;
declare const _path: unique symbol;
declare const _pos: unique symbol;
declare const _queue: unique symbol;
declare const _read: unique symbol;
declare const _readSize: unique symbol;
declare const _reading: unique symbol;
declare const _remain: unique symbol;
declare const _size: unique symbol;
declare const _write: unique symbol;
declare const _writing: unique symbol;
declare const _defaultFlag: unique symbol;
declare const _errored: unique symbol;
export type ReadStreamOptions = Minipass.Options<Minipass.ContiguousData> & {
fd?: number;
readSize?: number;
size?: number;
autoClose?: boolean;
};
export type ReadStreamEvents = Minipass.Events<Minipass.ContiguousData> & {
open: [fd: number];
};
export declare class ReadStream extends Minipass<Minipass.ContiguousData, Buffer, ReadStreamEvents> {
[_errored]: boolean;
[_fd]?: number;
[_path]: string;
[_readSize]: number;
[_reading]: boolean;
[_size]: number;
[_remain]: number;
[_autoClose]: boolean;
constructor(path: string, opt: ReadStreamOptions);
get fd(): number | undefined;
get path(): string;
write(): void;
end(): void;
[_open](): void;
[_onopen](er?: NodeJS.ErrnoException | null, fd?: number): void;
[_makeBuf](): Buffer;
[_read](): void;
[_onread](er?: NodeJS.ErrnoException | null, br?: number, buf?: Buffer): void;
[_close](): void;
[_onerror](er: NodeJS.ErrnoException): void;
[_handleChunk](br: number, buf: Buffer): boolean;
emit<Event extends keyof ReadStreamEvents>(ev: Event, ...args: ReadStreamEvents[Event]): boolean;
}
export declare class ReadStreamSync extends ReadStream {
[_open](): void;
[_read](): void;
[_close](): void;
}
export type WriteStreamOptions = {
fd?: number;
autoClose?: boolean;
mode?: number;
captureRejections?: boolean;
start?: number;
flags?: string;
};
export declare class WriteStream extends EE {
readable: false;
writable: boolean;
[_errored]: boolean;
[_writing]: boolean;
[_ended]: boolean;
[_queue]: Buffer[];
[_needDrain]: boolean;
[_path]: string;
[_mode]: number;
[_autoClose]: boolean;
[_fd]?: number;
[_defaultFlag]: boolean;
[_flags]: string;
[_finished]: boolean;
[_pos]?: number;
constructor(path: string, opt: WriteStreamOptions);
emit(ev: string, ...args: any[]): boolean;
get fd(): number | undefined;
get path(): string;
[_onerror](er: NodeJS.ErrnoException): void;
[_open](): void;
[_onopen](er?: null | NodeJS.ErrnoException, fd?: number): void;
end(buf: string, enc?: BufferEncoding): this;
end(buf?: Buffer, enc?: undefined): this;
write(buf: string, enc?: BufferEncoding): boolean;
write(buf: Buffer, enc?: undefined): boolean;
[_write](buf: Buffer): void;
[_onwrite](er?: null | NodeJS.ErrnoException, bw?: number): void;
[_flush](): void;
[_close](): void;
}
export declare class WriteStreamSync extends WriteStream {
[_open](): void;
[_close](): void;
[_write](buf: Buffer): void;
}
export {};
//# sourceMappingURL=index.d.ts.map

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"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.WriteStreamSync = exports.WriteStream = exports.ReadStreamSync = exports.ReadStream = void 0;
const events_1 = __importDefault(require("events"));
const fs_1 = __importDefault(require("fs"));
const minipass_1 = require("minipass");
const writev = fs_1.default.writev;
const _autoClose = Symbol('_autoClose');
const _close = Symbol('_close');
const _ended = Symbol('_ended');
const _fd = Symbol('_fd');
const _finished = Symbol('_finished');
const _flags = Symbol('_flags');
const _flush = Symbol('_flush');
const _handleChunk = Symbol('_handleChunk');
const _makeBuf = Symbol('_makeBuf');
const _mode = Symbol('_mode');
const _needDrain = Symbol('_needDrain');
const _onerror = Symbol('_onerror');
const _onopen = Symbol('_onopen');
const _onread = Symbol('_onread');
const _onwrite = Symbol('_onwrite');
const _open = Symbol('_open');
const _path = Symbol('_path');
const _pos = Symbol('_pos');
const _queue = Symbol('_queue');
const _read = Symbol('_read');
const _readSize = Symbol('_readSize');
const _reading = Symbol('_reading');
const _remain = Symbol('_remain');
const _size = Symbol('_size');
const _write = Symbol('_write');
const _writing = Symbol('_writing');
const _defaultFlag = Symbol('_defaultFlag');
const _errored = Symbol('_errored');
class ReadStream extends minipass_1.Minipass {
[_errored] = false;
[_fd];
[_path];
[_readSize];
[_reading] = false;
[_size];
[_remain];
[_autoClose];
constructor(path, opt) {
opt = opt || {};
super(opt);
this.readable = true;
this.writable = false;
if (typeof path !== 'string') {
throw new TypeError('path must be a string');
}
this[_errored] = false;
this[_fd] = typeof opt.fd === 'number' ? opt.fd : undefined;
this[_path] = path;
this[_readSize] = opt.readSize || 16 * 1024 * 1024;
this[_reading] = false;
this[_size] = typeof opt.size === 'number' ? opt.size : Infinity;
this[_remain] = this[_size];
this[_autoClose] =
typeof opt.autoClose === 'boolean' ? opt.autoClose : true;
if (typeof this[_fd] === 'number') {
this[_read]();
}
else {
this[_open]();
}
}
get fd() {
return this[_fd];
}
get path() {
return this[_path];
}
//@ts-ignore
write() {
throw new TypeError('this is a readable stream');
}
//@ts-ignore
end() {
throw new TypeError('this is a readable stream');
}
[_open]() {
fs_1.default.open(this[_path], 'r', (er, fd) => this[_onopen](er, fd));
}
[_onopen](er, fd) {
if (er) {
this[_onerror](er);
}
else {
this[_fd] = fd;
this.emit('open', fd);
this[_read]();
}
}
[_makeBuf]() {
return Buffer.allocUnsafe(Math.min(this[_readSize], this[_remain]));
}
[_read]() {
if (!this[_reading]) {
this[_reading] = true;
const buf = this[_makeBuf]();
/* c8 ignore start */
if (buf.length === 0) {
return process.nextTick(() => this[_onread](null, 0, buf));
}
/* c8 ignore stop */
fs_1.default.read(this[_fd], buf, 0, buf.length, null, (er, br, b) => this[_onread](er, br, b));
}
}
[_onread](er, br, buf) {
this[_reading] = false;
if (er) {
this[_onerror](er);
}
else if (this[_handleChunk](br, buf)) {
this[_read]();
}
}
[_close]() {
if (this[_autoClose] && typeof this[_fd] === 'number') {
const fd = this[_fd];
this[_fd] = undefined;
fs_1.default.close(fd, er => er ? this.emit('error', er) : this.emit('close'));
}
}
[_onerror](er) {
this[_reading] = true;
this[_close]();
this.emit('error', er);
}
[_handleChunk](br, buf) {
let ret = false;
// no effect if infinite
this[_remain] -= br;
if (br > 0) {
ret = super.write(br < buf.length ? buf.subarray(0, br) : buf);
}
if (br === 0 || this[_remain] <= 0) {
ret = false;
this[_close]();
super.end();
}
return ret;
}
emit(ev, ...args) {
switch (ev) {
case 'prefinish':
case 'finish':
return false;
case 'drain':
if (typeof this[_fd] === 'number') {
this[_read]();
}
return false;
case 'error':
if (this[_errored]) {
return false;
}
this[_errored] = true;
return super.emit(ev, ...args);
default:
return super.emit(ev, ...args);
}
}
}
exports.ReadStream = ReadStream;
class ReadStreamSync extends ReadStream {
[_open]() {
let threw = true;
try {
this[_onopen](null, fs_1.default.openSync(this[_path], 'r'));
threw = false;
}
finally {
if (threw) {
this[_close]();
}
}
}
[_read]() {
let threw = true;
try {
if (!this[_reading]) {
this[_reading] = true;
do {
const buf = this[_makeBuf]();
/* c8 ignore start */
const br = buf.length === 0
? 0
: fs_1.default.readSync(this[_fd], buf, 0, buf.length, null);
/* c8 ignore stop */
if (!this[_handleChunk](br, buf)) {
break;
}
} while (true);
this[_reading] = false;
}
threw = false;
}
finally {
if (threw) {
this[_close]();
}
}
}
[_close]() {
if (this[_autoClose] && typeof this[_fd] === 'number') {
const fd = this[_fd];
this[_fd] = undefined;
fs_1.default.closeSync(fd);
this.emit('close');
}
}
}
exports.ReadStreamSync = ReadStreamSync;
class WriteStream extends events_1.default {
readable = false;
writable = true;
[_errored] = false;
[_writing] = false;
[_ended] = false;
[_queue] = [];
[_needDrain] = false;
[_path];
[_mode];
[_autoClose];
[_fd];
[_defaultFlag];
[_flags];
[_finished] = false;
[_pos];
constructor(path, opt) {
opt = opt || {};
super(opt);
this[_path] = path;
this[_fd] = typeof opt.fd === 'number' ? opt.fd : undefined;
this[_mode] = opt.mode === undefined ? 0o666 : opt.mode;
this[_pos] = typeof opt.start === 'number' ? opt.start : undefined;
this[_autoClose] =
typeof opt.autoClose === 'boolean' ? opt.autoClose : true;
// truncating makes no sense when writing into the middle
const defaultFlag = this[_pos] !== undefined ? 'r+' : 'w';
this[_defaultFlag] = opt.flags === undefined;
this[_flags] = opt.flags === undefined ? defaultFlag : opt.flags;
if (this[_fd] === undefined) {
this[_open]();
}
}
emit(ev, ...args) {
if (ev === 'error') {
if (this[_errored]) {
return false;
}
this[_errored] = true;
}
return super.emit(ev, ...args);
}
get fd() {
return this[_fd];
}
get path() {
return this[_path];
}
[_onerror](er) {
this[_close]();
this[_writing] = true;
this.emit('error', er);
}
[_open]() {
fs_1.default.open(this[_path], this[_flags], this[_mode], (er, fd) => this[_onopen](er, fd));
}
[_onopen](er, fd) {
if (this[_defaultFlag] &&
this[_flags] === 'r+' &&
er &&
er.code === 'ENOENT') {
this[_flags] = 'w';
this[_open]();
}
else if (er) {
this[_onerror](er);
}
else {
this[_fd] = fd;
this.emit('open', fd);
if (!this[_writing]) {
this[_flush]();
}
}
}
end(buf, enc) {
if (buf) {
//@ts-ignore
this.write(buf, enc);
}
this[_ended] = true;
// synthetic after-write logic, where drain/finish live
if (!this[_writing] &&
!this[_queue].length &&
typeof this[_fd] === 'number') {
this[_onwrite](null, 0);
}
return this;
}
write(buf, enc) {
if (typeof buf === 'string') {
buf = Buffer.from(buf, enc);
}
if (this[_ended]) {
this.emit('error', new Error('write() after end()'));
return false;
}
if (this[_fd] === undefined || this[_writing] || this[_queue].length) {
this[_queue].push(buf);
this[_needDrain] = true;
return false;
}
this[_writing] = true;
this[_write](buf);
return true;
}
[_write](buf) {
fs_1.default.write(this[_fd], buf, 0, buf.length, this[_pos], (er, bw) => this[_onwrite](er, bw));
}
[_onwrite](er, bw) {
if (er) {
this[_onerror](er);
}
else {
if (this[_pos] !== undefined && typeof bw === 'number') {
this[_pos] += bw;
}
if (this[_queue].length) {
this[_flush]();
}
else {
this[_writing] = false;
if (this[_ended] && !this[_finished]) {
this[_finished] = true;
this[_close]();
this.emit('finish');
}
else if (this[_needDrain]) {
this[_needDrain] = false;
this.emit('drain');
}
}
}
}
[_flush]() {
if (this[_queue].length === 0) {
if (this[_ended]) {
this[_onwrite](null, 0);
}
}
else if (this[_queue].length === 1) {
this[_write](this[_queue].pop());
}
else {
const iovec = this[_queue];
this[_queue] = [];
writev(this[_fd], iovec, this[_pos], (er, bw) => this[_onwrite](er, bw));
}
}
[_close]() {
if (this[_autoClose] && typeof this[_fd] === 'number') {
const fd = this[_fd];
this[_fd] = undefined;
fs_1.default.close(fd, er => er ? this.emit('error', er) : this.emit('close'));
}
}
}
exports.WriteStream = WriteStream;
class WriteStreamSync extends WriteStream {
[_open]() {
let fd;
// only wrap in a try{} block if we know we'll retry, to avoid
// the rethrow obscuring the error's source frame in most cases.
if (this[_defaultFlag] && this[_flags] === 'r+') {
try {
fd = fs_1.default.openSync(this[_path], this[_flags], this[_mode]);
}
catch (er) {
if (er?.code === 'ENOENT') {
this[_flags] = 'w';
return this[_open]();
}
else {
throw er;
}
}
}
else {
fd = fs_1.default.openSync(this[_path], this[_flags], this[_mode]);
}
this[_onopen](null, fd);
}
[_close]() {
if (this[_autoClose] && typeof this[_fd] === 'number') {
const fd = this[_fd];
this[_fd] = undefined;
fs_1.default.closeSync(fd);
this.emit('close');
}
}
[_write](buf) {
// throw the original, but try to close if it fails
let threw = true;
try {
this[_onwrite](null, fs_1.default.writeSync(this[_fd], buf, 0, buf.length, this[_pos]));
threw = false;
}
finally {
if (threw) {
try {
this[_close]();
}
catch {
// ok error
}
}
}
}
}
exports.WriteStreamSync = WriteStreamSync;
//# sourceMappingURL=index.js.map

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{
"type": "commonjs"
}

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/// <reference types="node" resolution-mode="require"/>
/// <reference types="node" resolution-mode="require"/>
/// <reference types="node" resolution-mode="require"/>
import EE from 'events';
import { Minipass } from 'minipass';
declare const _autoClose: unique symbol;
declare const _close: unique symbol;
declare const _ended: unique symbol;
declare const _fd: unique symbol;
declare const _finished: unique symbol;
declare const _flags: unique symbol;
declare const _flush: unique symbol;
declare const _handleChunk: unique symbol;
declare const _makeBuf: unique symbol;
declare const _mode: unique symbol;
declare const _needDrain: unique symbol;
declare const _onerror: unique symbol;
declare const _onopen: unique symbol;
declare const _onread: unique symbol;
declare const _onwrite: unique symbol;
declare const _open: unique symbol;
declare const _path: unique symbol;
declare const _pos: unique symbol;
declare const _queue: unique symbol;
declare const _read: unique symbol;
declare const _readSize: unique symbol;
declare const _reading: unique symbol;
declare const _remain: unique symbol;
declare const _size: unique symbol;
declare const _write: unique symbol;
declare const _writing: unique symbol;
declare const _defaultFlag: unique symbol;
declare const _errored: unique symbol;
export type ReadStreamOptions = Minipass.Options<Minipass.ContiguousData> & {
fd?: number;
readSize?: number;
size?: number;
autoClose?: boolean;
};
export type ReadStreamEvents = Minipass.Events<Minipass.ContiguousData> & {
open: [fd: number];
};
export declare class ReadStream extends Minipass<Minipass.ContiguousData, Buffer, ReadStreamEvents> {
[_errored]: boolean;
[_fd]?: number;
[_path]: string;
[_readSize]: number;
[_reading]: boolean;
[_size]: number;
[_remain]: number;
[_autoClose]: boolean;
constructor(path: string, opt: ReadStreamOptions);
get fd(): number | undefined;
get path(): string;
write(): void;
end(): void;
[_open](): void;
[_onopen](er?: NodeJS.ErrnoException | null, fd?: number): void;
[_makeBuf](): Buffer;
[_read](): void;
[_onread](er?: NodeJS.ErrnoException | null, br?: number, buf?: Buffer): void;
[_close](): void;
[_onerror](er: NodeJS.ErrnoException): void;
[_handleChunk](br: number, buf: Buffer): boolean;
emit<Event extends keyof ReadStreamEvents>(ev: Event, ...args: ReadStreamEvents[Event]): boolean;
}
export declare class ReadStreamSync extends ReadStream {
[_open](): void;
[_read](): void;
[_close](): void;
}
export type WriteStreamOptions = {
fd?: number;
autoClose?: boolean;
mode?: number;
captureRejections?: boolean;
start?: number;
flags?: string;
};
export declare class WriteStream extends EE {
readable: false;
writable: boolean;
[_errored]: boolean;
[_writing]: boolean;
[_ended]: boolean;
[_queue]: Buffer[];
[_needDrain]: boolean;
[_path]: string;
[_mode]: number;
[_autoClose]: boolean;
[_fd]?: number;
[_defaultFlag]: boolean;
[_flags]: string;
[_finished]: boolean;
[_pos]?: number;
constructor(path: string, opt: WriteStreamOptions);
emit(ev: string, ...args: any[]): boolean;
get fd(): number | undefined;
get path(): string;
[_onerror](er: NodeJS.ErrnoException): void;
[_open](): void;
[_onopen](er?: null | NodeJS.ErrnoException, fd?: number): void;
end(buf: string, enc?: BufferEncoding): this;
end(buf?: Buffer, enc?: undefined): this;
write(buf: string, enc?: BufferEncoding): boolean;
write(buf: Buffer, enc?: undefined): boolean;
[_write](buf: Buffer): void;
[_onwrite](er?: null | NodeJS.ErrnoException, bw?: number): void;
[_flush](): void;
[_close](): void;
}
export declare class WriteStreamSync extends WriteStream {
[_open](): void;
[_close](): void;
[_write](buf: Buffer): void;
}
export {};
//# sourceMappingURL=index.d.ts.map

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import EE from 'events';
import fs from 'fs';
import { Minipass } from 'minipass';
const writev = fs.writev;
const _autoClose = Symbol('_autoClose');
const _close = Symbol('_close');
const _ended = Symbol('_ended');
const _fd = Symbol('_fd');
const _finished = Symbol('_finished');
const _flags = Symbol('_flags');
const _flush = Symbol('_flush');
const _handleChunk = Symbol('_handleChunk');
const _makeBuf = Symbol('_makeBuf');
const _mode = Symbol('_mode');
const _needDrain = Symbol('_needDrain');
const _onerror = Symbol('_onerror');
const _onopen = Symbol('_onopen');
const _onread = Symbol('_onread');
const _onwrite = Symbol('_onwrite');
const _open = Symbol('_open');
const _path = Symbol('_path');
const _pos = Symbol('_pos');
const _queue = Symbol('_queue');
const _read = Symbol('_read');
const _readSize = Symbol('_readSize');
const _reading = Symbol('_reading');
const _remain = Symbol('_remain');
const _size = Symbol('_size');
const _write = Symbol('_write');
const _writing = Symbol('_writing');
const _defaultFlag = Symbol('_defaultFlag');
const _errored = Symbol('_errored');
export class ReadStream extends Minipass {
[_errored] = false;
[_fd];
[_path];
[_readSize];
[_reading] = false;
[_size];
[_remain];
[_autoClose];
constructor(path, opt) {
opt = opt || {};
super(opt);
this.readable = true;
this.writable = false;
if (typeof path !== 'string') {
throw new TypeError('path must be a string');
}
this[_errored] = false;
this[_fd] = typeof opt.fd === 'number' ? opt.fd : undefined;
this[_path] = path;
this[_readSize] = opt.readSize || 16 * 1024 * 1024;
this[_reading] = false;
this[_size] = typeof opt.size === 'number' ? opt.size : Infinity;
this[_remain] = this[_size];
this[_autoClose] =
typeof opt.autoClose === 'boolean' ? opt.autoClose : true;
if (typeof this[_fd] === 'number') {
this[_read]();
}
else {
this[_open]();
}
}
get fd() {
return this[_fd];
}
get path() {
return this[_path];
}
//@ts-ignore
write() {
throw new TypeError('this is a readable stream');
}
//@ts-ignore
end() {
throw new TypeError('this is a readable stream');
}
[_open]() {
fs.open(this[_path], 'r', (er, fd) => this[_onopen](er, fd));
}
[_onopen](er, fd) {
if (er) {
this[_onerror](er);
}
else {
this[_fd] = fd;
this.emit('open', fd);
this[_read]();
}
}
[_makeBuf]() {
return Buffer.allocUnsafe(Math.min(this[_readSize], this[_remain]));
}
[_read]() {
if (!this[_reading]) {
this[_reading] = true;
const buf = this[_makeBuf]();
/* c8 ignore start */
if (buf.length === 0) {
return process.nextTick(() => this[_onread](null, 0, buf));
}
/* c8 ignore stop */
fs.read(this[_fd], buf, 0, buf.length, null, (er, br, b) => this[_onread](er, br, b));
}
}
[_onread](er, br, buf) {
this[_reading] = false;
if (er) {
this[_onerror](er);
}
else if (this[_handleChunk](br, buf)) {
this[_read]();
}
}
[_close]() {
if (this[_autoClose] && typeof this[_fd] === 'number') {
const fd = this[_fd];
this[_fd] = undefined;
fs.close(fd, er => er ? this.emit('error', er) : this.emit('close'));
}
}
[_onerror](er) {
this[_reading] = true;
this[_close]();
this.emit('error', er);
}
[_handleChunk](br, buf) {
let ret = false;
// no effect if infinite
this[_remain] -= br;
if (br > 0) {
ret = super.write(br < buf.length ? buf.subarray(0, br) : buf);
}
if (br === 0 || this[_remain] <= 0) {
ret = false;
this[_close]();
super.end();
}
return ret;
}
emit(ev, ...args) {
switch (ev) {
case 'prefinish':
case 'finish':
return false;
case 'drain':
if (typeof this[_fd] === 'number') {
this[_read]();
}
return false;
case 'error':
if (this[_errored]) {
return false;
}
this[_errored] = true;
return super.emit(ev, ...args);
default:
return super.emit(ev, ...args);
}
}
}
export class ReadStreamSync extends ReadStream {
[_open]() {
let threw = true;
try {
this[_onopen](null, fs.openSync(this[_path], 'r'));
threw = false;
}
finally {
if (threw) {
this[_close]();
}
}
}
[_read]() {
let threw = true;
try {
if (!this[_reading]) {
this[_reading] = true;
do {
const buf = this[_makeBuf]();
/* c8 ignore start */
const br = buf.length === 0
? 0
: fs.readSync(this[_fd], buf, 0, buf.length, null);
/* c8 ignore stop */
if (!this[_handleChunk](br, buf)) {
break;
}
} while (true);
this[_reading] = false;
}
threw = false;
}
finally {
if (threw) {
this[_close]();
}
}
}
[_close]() {
if (this[_autoClose] && typeof this[_fd] === 'number') {
const fd = this[_fd];
this[_fd] = undefined;
fs.closeSync(fd);
this.emit('close');
}
}
}
export class WriteStream extends EE {
readable = false;
writable = true;
[_errored] = false;
[_writing] = false;
[_ended] = false;
[_queue] = [];
[_needDrain] = false;
[_path];
[_mode];
[_autoClose];
[_fd];
[_defaultFlag];
[_flags];
[_finished] = false;
[_pos];
constructor(path, opt) {
opt = opt || {};
super(opt);
this[_path] = path;
this[_fd] = typeof opt.fd === 'number' ? opt.fd : undefined;
this[_mode] = opt.mode === undefined ? 0o666 : opt.mode;
this[_pos] = typeof opt.start === 'number' ? opt.start : undefined;
this[_autoClose] =
typeof opt.autoClose === 'boolean' ? opt.autoClose : true;
// truncating makes no sense when writing into the middle
const defaultFlag = this[_pos] !== undefined ? 'r+' : 'w';
this[_defaultFlag] = opt.flags === undefined;
this[_flags] = opt.flags === undefined ? defaultFlag : opt.flags;
if (this[_fd] === undefined) {
this[_open]();
}
}
emit(ev, ...args) {
if (ev === 'error') {
if (this[_errored]) {
return false;
}
this[_errored] = true;
}
return super.emit(ev, ...args);
}
get fd() {
return this[_fd];
}
get path() {
return this[_path];
}
[_onerror](er) {
this[_close]();
this[_writing] = true;
this.emit('error', er);
}
[_open]() {
fs.open(this[_path], this[_flags], this[_mode], (er, fd) => this[_onopen](er, fd));
}
[_onopen](er, fd) {
if (this[_defaultFlag] &&
this[_flags] === 'r+' &&
er &&
er.code === 'ENOENT') {
this[_flags] = 'w';
this[_open]();
}
else if (er) {
this[_onerror](er);
}
else {
this[_fd] = fd;
this.emit('open', fd);
if (!this[_writing]) {
this[_flush]();
}
}
}
end(buf, enc) {
if (buf) {
//@ts-ignore
this.write(buf, enc);
}
this[_ended] = true;
// synthetic after-write logic, where drain/finish live
if (!this[_writing] &&
!this[_queue].length &&
typeof this[_fd] === 'number') {
this[_onwrite](null, 0);
}
return this;
}
write(buf, enc) {
if (typeof buf === 'string') {
buf = Buffer.from(buf, enc);
}
if (this[_ended]) {
this.emit('error', new Error('write() after end()'));
return false;
}
if (this[_fd] === undefined || this[_writing] || this[_queue].length) {
this[_queue].push(buf);
this[_needDrain] = true;
return false;
}
this[_writing] = true;
this[_write](buf);
return true;
}
[_write](buf) {
fs.write(this[_fd], buf, 0, buf.length, this[_pos], (er, bw) => this[_onwrite](er, bw));
}
[_onwrite](er, bw) {
if (er) {
this[_onerror](er);
}
else {
if (this[_pos] !== undefined && typeof bw === 'number') {
this[_pos] += bw;
}
if (this[_queue].length) {
this[_flush]();
}
else {
this[_writing] = false;
if (this[_ended] && !this[_finished]) {
this[_finished] = true;
this[_close]();
this.emit('finish');
}
else if (this[_needDrain]) {
this[_needDrain] = false;
this.emit('drain');
}
}
}
}
[_flush]() {
if (this[_queue].length === 0) {
if (this[_ended]) {
this[_onwrite](null, 0);
}
}
else if (this[_queue].length === 1) {
this[_write](this[_queue].pop());
}
else {
const iovec = this[_queue];
this[_queue] = [];
writev(this[_fd], iovec, this[_pos], (er, bw) => this[_onwrite](er, bw));
}
}
[_close]() {
if (this[_autoClose] && typeof this[_fd] === 'number') {
const fd = this[_fd];
this[_fd] = undefined;
fs.close(fd, er => er ? this.emit('error', er) : this.emit('close'));
}
}
}
export class WriteStreamSync extends WriteStream {
[_open]() {
let fd;
// only wrap in a try{} block if we know we'll retry, to avoid
// the rethrow obscuring the error's source frame in most cases.
if (this[_defaultFlag] && this[_flags] === 'r+') {
try {
fd = fs.openSync(this[_path], this[_flags], this[_mode]);
}
catch (er) {
if (er?.code === 'ENOENT') {
this[_flags] = 'w';
return this[_open]();
}
else {
throw er;
}
}
}
else {
fd = fs.openSync(this[_path], this[_flags], this[_mode]);
}
this[_onopen](null, fd);
}
[_close]() {
if (this[_autoClose] && typeof this[_fd] === 'number') {
const fd = this[_fd];
this[_fd] = undefined;
fs.closeSync(fd);
this.emit('close');
}
}
[_write](buf) {
// throw the original, but try to close if it fails
let threw = true;
try {
this[_onwrite](null, fs.writeSync(this[_fd], buf, 0, buf.length, this[_pos]));
threw = false;
}
finally {
if (threw) {
try {
this[_close]();
}
catch {
// ok error
}
}
}
}
}
//# sourceMappingURL=index.js.map

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{
"type": "module"
}

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{
"name": "@isaacs/fs-minipass",
"version": "4.0.1",
"main": "./dist/commonjs/index.js",
"scripts": {
"prepare": "tshy",
"pretest": "npm run prepare",
"test": "tap",
"preversion": "npm test",
"postversion": "npm publish",
"prepublishOnly": "git push origin --follow-tags",
"format": "prettier --write . --loglevel warn",
"typedoc": "typedoc --tsconfig .tshy/esm.json ./src/*.ts"
},
"keywords": [],
"author": "Isaac Z. Schlueter",
"license": "ISC",
"repository": {
"type": "git",
"url": "https://github.com/npm/fs-minipass.git"
},
"description": "fs read and write streams based on minipass",
"dependencies": {
"minipass": "^7.0.4"
},
"devDependencies": {
"@types/node": "^20.11.30",
"mutate-fs": "^2.1.1",
"prettier": "^3.2.5",
"tap": "^18.7.1",
"tshy": "^1.12.0",
"typedoc": "^0.25.12"
},
"files": [
"dist"
],
"engines": {
"node": ">=18.0.0"
},
"tshy": {
"exports": {
"./package.json": "./package.json",
".": "./src/index.ts"
}
},
"exports": {
"./package.json": "./package.json",
".": {
"import": {
"types": "./dist/esm/index.d.ts",
"default": "./dist/esm/index.js"
},
"require": {
"types": "./dist/commonjs/index.d.ts",
"default": "./dist/commonjs/index.js"
}
}
},
"types": "./dist/commonjs/index.d.ts",
"type": "module",
"prettier": {
"semi": false,
"printWidth": 75,
"tabWidth": 2,
"useTabs": false,
"singleQuote": true,
"jsxSingleQuote": false,
"bracketSameLine": true,
"arrowParens": "avoid",
"endOfLine": "lf"
}
}