749 lines
20 KiB
JavaScript
749 lines
20 KiB
JavaScript
/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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/*
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* Copyright 2015 Joyent, Inc.
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*/
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var assert = require('assert-plus');
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var child_process = require('child_process');
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var fs = require('fs');
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var os = require('os');
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var path = require('path');
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var read = require('read');
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var tty = require('tty');
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var util = require('util'),
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format = util.format;
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var wordwrap = require('wordwrap');
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var errors = require('./errors'),
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InternalError = errors.InternalError;
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// ---- support stuff
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function objCopy(obj, target) {
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assert.object(obj, 'obj');
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assert.optionalObject(obj, 'target');
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if (target === undefined) {
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target = {};
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}
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Object.keys(obj).forEach(function (k) {
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target[k] = obj[k];
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});
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return target;
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}
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function deepObjCopy(obj) {
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return JSON.parse(JSON.stringify(obj));
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}
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function zeroPad(n, width) {
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var s = String(n);
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assert.number(width, 'width');
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assert.string(s, 'string');
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while (s.length < width) {
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s = '0' + s;
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}
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return s;
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}
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/**
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* Convert a boolean or string representation into a boolean, or
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* raise TypeError trying.
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*
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* @param value {Boolean|String} The input value to convert.
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* @param default_ {Boolean} The default value is `value` is undefined.
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* @param errName {String} The context to quote in the possibly
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* raised TypeError.
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*/
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function boolFromString(value, default_, errName) {
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if (value === undefined) {
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return default_;
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} else if (value === 'false' || value === '0') {
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return false;
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} else if (value === 'true' || value === '1') {
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return true;
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} else if (typeof (value) === 'boolean') {
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return value;
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} else {
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var errmsg = format('invalid boolean value: %j', value);
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if (errName) {
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errmsg = format('invalid boolean value for %s: %j', errName, value);
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}
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throw new TypeError(errmsg);
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}
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}
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/**
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* given an array return a string with each element
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* JSON-stringifed separated by newlines
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*/
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function jsonStream(arr, stream) {
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stream = stream || process.stdout;
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arr.forEach(function (elem) {
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stream.write(JSON.stringify(elem) + '\n');
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});
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}
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/**
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* given an array of key=value pairs, break them into an object
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*
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* @param {Array} kvs - an array of key=value pairs
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* @param {Array} valid (optional) - an array to validate pairs
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*/
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function kvToObj(kvs, valid) {
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assert.arrayOfString(kvs, 'kvs');
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assert.optionalArrayOfString(valid, 'valid');
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var o = {};
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for (var i = 0; i < kvs.length; i++) {
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var kv = kvs[i];
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var idx = kv.indexOf('=');
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if (idx === -1)
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throw new errors.UsageError(format(
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'invalid filter: "%s" (must be of the form "field=value")',
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kv));
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var k = kv.slice(0, idx);
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var v = kv.slice(idx + 1);
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if (valid && valid.indexOf(k) === -1)
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throw new errors.UsageError(format(
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'invalid filter name: "%s" (must be one of "%s")',
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k, valid.join('", "')));
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o[k] = v;
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}
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return o;
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}
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/**
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* return how long ago something happened
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*
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* @param {Date} when - a date object in the past
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* @param {Date} now (optional) - a date object to compare to
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* @return {String} - printable string
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*/
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function longAgo(when, now) {
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now = now || new Date();
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assert.date(now, 'now');
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var seconds = Math.round((now - when) / 1000);
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var times = [
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seconds / 60 / 60 / 24 / 365, // years
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seconds / 60 / 60 / 24 / 7, // weeks
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seconds / 60 / 60 / 24, // days
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seconds / 60 / 60, // hours
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seconds / 60, // minutes
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seconds // seconds
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];
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var names = ['y', 'w', 'd', 'h', 'm', 's'];
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for (var i = 0; i < names.length; i++) {
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var time = Math.floor(times[i]);
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if (time > 0)
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return util.format('%d%s', time, names[i]);
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}
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return '0s';
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}
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/**
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* checks a string and returns a boolean based on if it
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* is a UUID or not
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*/
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function isUUID(s) {
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assert.string(s, 's');
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return /^([a-f\d]{8}(-[a-f\d]{4}){3}-[a-f\d]{12}?)$/i.test(s);
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}
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function humanDurationFromMs(ms) {
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assert.number(ms, 'ms');
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var sizes = [
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['ms', 1000, 's'],
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['s', 60, 'm'],
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['m', 60, 'h'],
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['h', 24, 'd'],
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['d', 7, 'w']
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];
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if (ms === 0) {
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return '0ms';
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}
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var bits = [];
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var n = ms;
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for (var i = 0; i < sizes.length; i++) {
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var size = sizes[i];
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var remainder = n % size[1];
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if (remainder === 0) {
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bits.unshift('');
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} else {
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bits.unshift(format('%d%s', remainder, size[0]));
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}
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n = Math.floor(n / size[1]);
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if (n === 0) {
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break;
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} else if (i === sizes.length - 1) {
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bits.unshift(format('%d%s', n, size[2]));
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break;
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}
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}
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if (bits.length > 1 && bits[bits.length - 1].slice(-2) === 'ms') {
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bits.pop();
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}
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return bits.slice(0, 2).join('');
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}
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/**
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* Adapted from <http://stackoverflow.com/a/18650828>
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*
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* @param {Number} opts.precision The number of decimal places of precision to
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* include. Note: This is just clipping (i.e. floor) instead of rounding.
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* TODO: round
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* @param {Boolean} opts.narrow Make it as narrow as possible: short units,
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* no space between value and unit, drop precision if it is all zeros.
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*/
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function humanSizeFromBytes(opts, bytes) {
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if (bytes === undefined) {
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bytes = opts;
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opts = {};
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}
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assert.number(bytes, 'bytes');
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// The number of decimal places, default 1.
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assert.optionalNumber(opts.precision, 'opts.precision');
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var precision = opts.precision === undefined ? 1 : opts.precision;
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assert.ok(precision >= 0);
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assert.optionalBool(opts.narrow, 'opts.narrow');
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var sizes = ['B', 'KiB', 'MiB', 'GiB', 'TiB', 'PiB'];
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if (opts.narrow) {
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sizes = ['B', 'K', 'M', 'G', 'T', 'P'];
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}
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var template = opts.narrow ? '%s%s%s' : '%s%s %s';
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if (bytes === 0) {
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return '0 B';
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}
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var sign = bytes < 0 ? '-' : '';
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bytes = Math.abs(bytes);
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var i = Number(Math.floor(Math.log(bytes) / Math.log(1024)));
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var s = String(bytes / Math.pow(1024, i));
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var hasDecimal = s.indexOf('.') !== -1;
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if (precision === 0) {
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if (hasDecimal) {
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s = s.slice(0, s.indexOf('.'));
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}
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} else if (opts.narrow && !hasDecimal) {
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/* skip all-zero precision */
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/* jsl:pass */
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} else {
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if (!hasDecimal) {
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s += '.';
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}
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var places = s.length - s.indexOf('.') - 1;
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while (places < precision) {
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s += '0';
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places++;
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}
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if (places > precision) {
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s = s.slice(0, s.length - places + precision);
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}
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}
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//var precision1 = (s.indexOf('.') === -1
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// ? s + '.0' : s.slice(0, s.indexOf('.') + 2));
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return format(template, sign, s, sizes[i]);
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}
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/*
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* capitalize the first character of a string and return the new string
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*/
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function capitalize(s) {
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assert.string(s, 's');
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return s[0].toUpperCase() + s.substr(1);
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}
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/*
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* Convert a UUID to a short ID
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*/
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function uuidToShortId(s) {
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assert.uuid(s, 's');
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return s.split('-', 1)[0];
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}
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/*
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* Normalize a short ID. Returns undefined if the given string isn't a valid
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* short id.
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*
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* Short IDs:
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* - UUID prefix
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* - allow '-' to be elided (to support using containers IDs from
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* docker)
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* - support docker ID *longer* than a UUID? The curr implementation does.
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*/
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function normShortId(s) {
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assert.string(s, 's');
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var shortIdCharsRe = /^[a-f0-9]+$/;
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var shortId;
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if (s.indexOf('-') === -1) {
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if (!shortIdCharsRe.test(s)) {
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return;
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}
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shortId = s.substr(0, 8) + '-'
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+ s.substr(8, 4) + '-'
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+ s.substr(12, 4) + '-'
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+ s.substr(16, 4) + '-'
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+ s.substr(20, 12);
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shortId = shortId.replace(/-+$/, '');
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} else {
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// UUID prefix.
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shortId = '';
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var remaining = s;
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var spans = [8, 4, 4, 4, 12];
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for (var i = 0; i < spans.length; i++) {
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var span = spans[i];
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var head = remaining.slice(0, span);
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remaining = remaining.slice(span + 1);
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if (!shortIdCharsRe.test(head)) {
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return;
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}
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shortId += head;
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if (remaining && i + 1 < spans.length) {
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shortId += '-';
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} else {
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break;
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}
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}
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}
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return shortId;
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}
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/*
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* take a "profile" object and return a slug based on the account name
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* and DC URL. This is currently used to create a filesystem-safe name
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* to use for caching
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*/
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function profileSlug(o) {
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assert.object(o, 'o');
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assert.string(o.account, 'o.account');
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assert.string(o.url, 'o.url');
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var acct = o.account.replace(/[@]/g, '_');
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var url = o.url.replace(/^https?:\/\//, '');
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var s = format('%s@%s', acct, url).replace(/[!#$%\^&\*:'"\?\/\\\.]/g, '_');
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return s;
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}
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/*
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* Return a filename-safe slug for the given string.
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*/
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function filenameSlug(str) {
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return str
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.toLowerCase()
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.replace(/ +/g, '-')
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.replace(/[^-\w]/g, '');
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}
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/*
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* take some basic information and return node-cmdln options suitable for
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* tabula
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*
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* @param {String} (optional) opts.columnDefault Default value for `-o`
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* @param {String} (optional) opts.sortDefault Default value for `-s`
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* @param {String} (optional) opts.includeLong Include `-l` option
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* @return {Array} Array of cmdln options objects
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*/
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function getCliTableOptions(opts) {
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opts = opts || {};
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assert.object(opts, 'opts');
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assert.optionalString(opts.columnsDefault, 'opts.columnsDefault');
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assert.optionalString(opts.sortDefault, 'opts.sortDefault');
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assert.optionalBool(opts.includeLong, 'opts.includeLong');
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var o;
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// construct the options object
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var tOpts = [];
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// header
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tOpts.push({
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group: 'Output options'
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});
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// -H
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tOpts.push({
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names: ['H'],
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type: 'bool',
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help: 'Omit table header row.'
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});
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// -o field1,field2,...
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o = {
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names: ['o'],
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type: 'string',
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help: 'Specify fields (columns) to output.',
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helpArg: 'field1,...'
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};
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if (opts.columnsDefault)
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o.default = opts.columnsDefault;
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tOpts.push(o);
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// -l, --long
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if (opts.includeLong) {
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tOpts.push({
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names: ['long', 'l'],
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type: 'bool',
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help: 'Long/wider output. Ignored if "-o ..." is used.'
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});
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}
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// -s field1,field2,...
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o = {
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names: ['s'],
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type: 'string',
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help: 'Sort on the given fields.',
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helpArg: 'field1,...'
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};
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if (opts.sortDefault) {
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o.default = opts.sortDefault;
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o.help = format('%s Default is "%s".', o.help, opts.sortDefault);
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}
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tOpts.push(o);
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// -j, --json
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tOpts.push({
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names: ['json', 'j'],
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type: 'bool',
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help: 'JSON output.'
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});
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return tOpts;
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}
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/**
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* Prompt a user for a y/n answer.
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*
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* cb('y') user entered in the affirmative
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* cb('n') user entered in the negative
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* cb(false) user ^C'd
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*
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* Dev Note: Borrowed from imgadm's common.js. If this starts showing issues,
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* we should consider using the npm 'read' module.
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*/
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function promptYesNo(opts_, cb) {
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assert.object(opts_, 'opts');
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assert.string(opts_.msg, 'opts.msg');
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assert.optionalString(opts_.default, 'opts.default');
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var opts = objCopy(opts_);
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// Setup stdout and stdin to talk to the controlling terminal if
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// process.stdout or process.stdin is not a TTY.
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var stdout;
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if (opts.stdout) {
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stdout = opts.stdout;
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} else if (process.stdout.isTTY) {
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stdout = process.stdout;
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} else {
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opts.stdout_fd = fs.openSync('/dev/tty', 'r+');
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stdout = opts.stdout = new tty.WriteStream(opts.stdout_fd);
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}
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var stdin;
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if (opts.stdin) {
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stdin = opts.stdin;
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} else if (process.stdin.isTTY) {
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stdin = process.stdin;
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} else {
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opts.stdin_fd = fs.openSync('/dev/tty', 'r+');
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stdin = opts.stdin = new tty.ReadStream(opts.stdin_fd);
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}
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stdout.write(opts.msg);
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stdin.setEncoding('utf8');
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stdin.setRawMode(true);
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stdin.resume();
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var input = '';
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stdin.on('data', onData);
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function postInput() {
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stdin.setRawMode(false);
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stdin.pause();
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stdin.write('\n');
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stdin.removeListener('data', onData);
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}
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function finish(rv) {
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if (opts.stdout_fd !== undefined) {
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stdout.end();
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delete opts.stdout_fd;
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}
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if (opts.stdin_fd !== undefined) {
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stdin.end();
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delete opts.stdin_fd;
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}
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cb(rv);
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}
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|
function onData(ch) {
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ch = ch + '';
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|
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switch (ch) {
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case '\n':
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|
case '\r':
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|
case '\u0004':
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// They've finished typing their answer
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postInput();
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var answer = input.toLowerCase();
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if (answer === '' && opts.default) {
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finish(opts.default);
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} else if (answer === 'yes' || answer === 'y') {
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finish('y');
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} else if (answer === 'no' || answer === 'n') {
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finish('n');
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} else {
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stdout.write('Please enter "y", "yes", "n" or "no".\n');
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promptYesNo(opts, cb);
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return;
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}
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break;
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case '\u0003':
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// Ctrl C
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postInput();
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finish(false);
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break;
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default:
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// More plaintext characters
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stdout.write(ch);
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input += ch;
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break;
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}
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}
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|
}
|
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|
|
|
|
/*
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|
* Prompt and wait for <Enter> or Ctrl+C. Usage:
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|
*
|
|
* common.promptEnter('Press <Enter> to re-edit, Ctrl+C to abort.',
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|
* function (err) {
|
|
* if (err) {
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* // User hit Ctrl+C
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* } else {
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* // User hit Enter
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|
* }
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|
* }
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* );
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*/
|
|
function promptEnter(prompt, cb) {
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read({
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prompt: prompt
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|
}, function (err, result, isDefault) {
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cb(err);
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});
|
|
}
|
|
|
|
|
|
/*
|
|
* Prompt the user for a value.
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|
*
|
|
* @params field {Object}
|
|
* - field.desc {String} Optional. A description of the field to print
|
|
* before prompting.
|
|
* - field.key {String} The field name. Used as the prompt.
|
|
* - field.default Optional default value.
|
|
* - field.validate {Function} Optional. A validation/manipulation
|
|
* function of the form:
|
|
* function (value, cb)
|
|
* which should callback with
|
|
* cb([<error or null>, [<manipulated value>]])
|
|
* examples:
|
|
* cb(new Error('value is not a number'));
|
|
* cb(); // value is fine as is
|
|
* cb(null, Math.floor(Number(value))); // manip to a floored int
|
|
* - field.required {Boolean} Optional. If `field.validate` is not
|
|
* given, `required=true` will provide a validate func that requires
|
|
* a value.
|
|
* @params cb {Function} `function (err, value)`
|
|
* If the user aborted, the `err` will be whatever the [read
|
|
* package](https://www.npmjs.com/package/read) returns, i.e. a
|
|
* string "cancelled".
|
|
*/
|
|
function promptField(field, cb) {
|
|
var wrap = wordwrap(Math.min(process.stdout.columns, 78));
|
|
|
|
var validate = field.validate;
|
|
if (!validate && field.required) {
|
|
validate = function (value, validateCb) {
|
|
if (!value) {
|
|
validateCb(new Error(format('A value for "%s" is required.',
|
|
field.key)));
|
|
} else {
|
|
validateCb();
|
|
}
|
|
};
|
|
}
|
|
|
|
function attempt(next) {
|
|
read({
|
|
// read/readline prompting messes up width with ANSI codes here.
|
|
prompt: field.key + ':',
|
|
default: field.default,
|
|
silent: field.password,
|
|
edit: true
|
|
}, function (err, result, isDefault) {
|
|
if (err) {
|
|
return cb(err);
|
|
}
|
|
var value = result.trim();
|
|
if (!validate) {
|
|
return cb(null, value);
|
|
}
|
|
|
|
validate(value, function (validationErr, newValue) {
|
|
if (validationErr) {
|
|
console.log(ansiStylize(
|
|
wrap(validationErr.message), 'red'));
|
|
attempt();
|
|
} else {
|
|
if (newValue !== undefined) {
|
|
value = newValue;
|
|
}
|
|
cb(null, value);
|
|
}
|
|
});
|
|
});
|
|
}
|
|
|
|
if (field.desc) {
|
|
console.log(ansiStylize(wrap(field.desc), 'bold'));
|
|
}
|
|
attempt();
|
|
}
|
|
|
|
|
|
/**
|
|
* Edit the given text in $EDITOR (defaulting to `vi`) and return the edited
|
|
* text.
|
|
*
|
|
* This callback with `cb(err, updatedText, changed)` where `changed`
|
|
* is a boolean true if the text was changed.
|
|
*/
|
|
function editInEditor(opts, cb) {
|
|
assert.string(opts.text, 'opts.text');
|
|
assert.optionalString(opts.filename, 'opts.filename');
|
|
assert.func(cb, 'cb');
|
|
|
|
var tmpPath = path.resolve(os.tmpDir(),
|
|
format('triton-%s-edit-%s', process.pid, opts.filename || 'text'));
|
|
fs.writeFileSync(tmpPath, opts.text, 'utf8');
|
|
|
|
// TODO: want '-f' opt for vi? What about others?
|
|
var editor = process.env.EDITOR || '/usr/bin/vi';
|
|
var kid = child_process.spawn(editor, [tmpPath], {stdio: 'inherit'});
|
|
kid.on('exit', function (code) {
|
|
if (code) {
|
|
return (cb(code));
|
|
}
|
|
var afterText = fs.readFileSync(tmpPath, 'utf8');
|
|
fs.unlinkSync(tmpPath);
|
|
cb(null, afterText, (afterText !== opts.text));
|
|
});
|
|
}
|
|
|
|
|
|
// http://en.wikipedia.org/wiki/ANSI_escape_code#graphics
|
|
// Suggested colors (some are unreadable in common cases):
|
|
// - Good: cyan, yellow (limited use), bold, green, magenta, red
|
|
// - Bad: blue (not visible on cmd.exe), grey (same color as background on
|
|
// Solarized Dark theme from <https://github.com/altercation/solarized>, see
|
|
// issue #160)
|
|
var colors = {
|
|
'bold' : [1, 22],
|
|
'italic' : [3, 23],
|
|
'underline' : [4, 24],
|
|
'inverse' : [7, 27],
|
|
'white' : [37, 39],
|
|
'grey' : [90, 39],
|
|
'black' : [30, 39],
|
|
'blue' : [34, 39],
|
|
'cyan' : [36, 39],
|
|
'green' : [32, 39],
|
|
'magenta' : [35, 39],
|
|
'red' : [31, 39],
|
|
'yellow' : [33, 39]
|
|
};
|
|
|
|
function ansiStylize(str, color) {
|
|
if (!str)
|
|
return '';
|
|
var codes = colors[color];
|
|
if (codes) {
|
|
return '\033[' + codes[0] + 'm' + str +
|
|
'\033[' + codes[1] + 'm';
|
|
} else {
|
|
return str;
|
|
}
|
|
}
|
|
|
|
|
|
function indent(s, indentation) {
|
|
if (!indentation) {
|
|
indentation = ' ';
|
|
}
|
|
var lines = s.split(/\r?\n/g);
|
|
return indentation + lines.join('\n' + indentation);
|
|
}
|
|
|
|
|
|
// http://perldoc.perl.org/functions/chomp.html
|
|
function chomp(s) {
|
|
if (s.length) {
|
|
while (s.slice(-1) === '\n') {
|
|
s = s.slice(0, -1);
|
|
}
|
|
}
|
|
return s;
|
|
}
|
|
|
|
|
|
|
|
//---- exports
|
|
|
|
module.exports = {
|
|
objCopy: objCopy,
|
|
deepObjCopy: deepObjCopy,
|
|
zeroPad: zeroPad,
|
|
boolFromString: boolFromString,
|
|
jsonStream: jsonStream,
|
|
kvToObj: kvToObj,
|
|
longAgo: longAgo,
|
|
isUUID: isUUID,
|
|
humanDurationFromMs: humanDurationFromMs,
|
|
humanSizeFromBytes: humanSizeFromBytes,
|
|
capitalize: capitalize,
|
|
normShortId: normShortId,
|
|
uuidToShortId: uuidToShortId,
|
|
profileSlug: profileSlug,
|
|
filenameSlug: filenameSlug,
|
|
getCliTableOptions: getCliTableOptions,
|
|
promptYesNo: promptYesNo,
|
|
promptEnter: promptEnter,
|
|
promptField: promptField,
|
|
editInEditor: editInEditor,
|
|
ansiStylize: ansiStylize,
|
|
indent: indent,
|
|
chomp: chomp
|
|
};
|
|
// vim: set softtabstop=4 shiftwidth=4:
|