314 lines
8.2 KiB
JavaScript
Executable File
314 lines
8.2 KiB
JavaScript
Executable File
/**
|
|
* Copyright (c) 2015 Joyent Inc. All rights reserved.
|
|
*/
|
|
|
|
var assert = require('assert-plus');
|
|
var util = require('util'),
|
|
format = util.format;
|
|
|
|
var errors = require('./errors'),
|
|
InternalError = errors.InternalError;
|
|
|
|
|
|
// ---- globals
|
|
|
|
var p = console.log;
|
|
|
|
var UUID_RE = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/;
|
|
|
|
|
|
// ---- support stuff
|
|
|
|
function objCopy(obj, target) {
|
|
if (target === undefined) {
|
|
target = {};
|
|
}
|
|
Object.keys(obj).forEach(function (k) {
|
|
target[k] = obj[k];
|
|
});
|
|
return target;
|
|
}
|
|
|
|
|
|
function deepObjCopy(obj) {
|
|
return JSON.parse(JSON.stringify(obj));
|
|
}
|
|
|
|
|
|
function zeroPad(n, width) {
|
|
var s = String(n);
|
|
while (s.length < width) {
|
|
s = '0' + s;
|
|
}
|
|
return s;
|
|
}
|
|
|
|
|
|
/**
|
|
* Convert a boolean or string representation into a boolean, or
|
|
* raise TypeError trying.
|
|
*
|
|
* @param value {Boolean|String} The input value to convert.
|
|
* @param default_ {Boolean} The default value is `value` is undefined.
|
|
* @param errName {String} The context to quote in the possibly
|
|
* raised TypeError.
|
|
*/
|
|
function boolFromString(value, default_, errName) {
|
|
if (value === undefined) {
|
|
return default_;
|
|
} else if (value === 'false' || value === '0') {
|
|
return false;
|
|
} else if (value === 'true' || value === '1') {
|
|
return true;
|
|
} else if (typeof (value) === 'boolean') {
|
|
return value;
|
|
} else {
|
|
var errmsg = format('invalid boolean value: %j', value);
|
|
if (errName) {
|
|
errmsg = format('invalid boolean value for %s: %j', errName, value);
|
|
}
|
|
throw new TypeError(errmsg);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* given an array return a string with each element
|
|
* JSON-stringifed separated by newlines
|
|
*/
|
|
function jsonStream(arr, stream) {
|
|
stream = stream || process.stdout;
|
|
arr.forEach(function (elem) {
|
|
stream.write(JSON.stringify(elem) + '\n');
|
|
});
|
|
}
|
|
|
|
/**
|
|
* given an array of key=value pairs, break them into an object
|
|
*
|
|
* @param {Array} kvs - an array of key=value pairs
|
|
* @param {Array} valid (optional) - an array to validate pairs
|
|
*/
|
|
function kvToObj(kvs, valid) {
|
|
var o = {};
|
|
for (var i = 0; i < kvs.length; i++) {
|
|
var kv = kvs[i];
|
|
var idx = kv.indexOf('=');
|
|
if (idx === -1)
|
|
throw new errors.UsageError(format(
|
|
'invalid filter: "%s" (must be of the form "field=value")',
|
|
kv));
|
|
var k = kv.slice(0, idx);
|
|
var v = kv.slice(idx + 1);
|
|
if (valid.indexOf(k) === -1)
|
|
throw new errors.UsageError(format(
|
|
'invalid filter name: "%s" (must be one of "%s")',
|
|
k, valid.join('", "')));
|
|
o[k] = v;
|
|
}
|
|
return o;
|
|
}
|
|
|
|
/**
|
|
* return how long ago something happened
|
|
*
|
|
* @param {Date} when - a date object in the past
|
|
* @param {Date} now (optional) - a date object to compare to
|
|
* @return {String} - printable string
|
|
*/
|
|
function longAgo(when, now) {
|
|
now = now || new Date();
|
|
var seconds = Math.round((now - when) / 1000);
|
|
var times = [
|
|
seconds / 60 / 60 / 24 / 365, // years
|
|
seconds / 60 / 60 / 24 / 7, // weeks
|
|
seconds / 60 / 60 / 24, // days
|
|
seconds / 60 / 60, // hours
|
|
seconds / 60, // minutes
|
|
seconds // seconds
|
|
];
|
|
var names = ['y', 'w', 'd', 'h', 'm', 's'];
|
|
|
|
for (var i = 0; i < names.length; i++) {
|
|
var time = Math.floor(times[i]);
|
|
if (time > 0)
|
|
return util.format('%d%s', time, names[i]);
|
|
}
|
|
return '0s';
|
|
}
|
|
|
|
/**
|
|
* checks a string and returns a boolean based on if it
|
|
* is a UUID or not
|
|
*/
|
|
function isUUID(s) {
|
|
return /^([a-f\d]{8}(-[a-f\d]{4}){3}-[a-f\d]{12}?)$/i.test(s);
|
|
}
|
|
|
|
|
|
function humanDurationFromMs(ms) {
|
|
assert.number(ms, 'ms');
|
|
var sizes = [
|
|
['ms', 1000, 's'],
|
|
['s', 60, 'm'],
|
|
['m', 60, 'h'],
|
|
['h', 24, 'd'],
|
|
['d', 7, 'w']
|
|
];
|
|
if (ms === 0) {
|
|
return '0ms';
|
|
}
|
|
var bits = [];
|
|
var n = ms;
|
|
for (var i = 0; i < sizes.length; i++) {
|
|
var size = sizes[i];
|
|
var remainder = n % size[1];
|
|
if (remainder === 0) {
|
|
bits.unshift('');
|
|
} else {
|
|
bits.unshift(format('%d%s', remainder, size[0]));
|
|
}
|
|
n = Math.floor(n / size[1]);
|
|
if (n === 0) {
|
|
break;
|
|
} else if (i === sizes.length - 1) {
|
|
bits.unshift(format('%d%s', n, size[2]));
|
|
break;
|
|
}
|
|
}
|
|
if (bits.length > 1 && bits[bits.length - 1].slice(-2) === 'ms') {
|
|
bits.pop();
|
|
}
|
|
return bits.slice(0, 2).join('');
|
|
}
|
|
|
|
/**
|
|
* Adapted from <http://stackoverflow.com/a/18650828>
|
|
*
|
|
* @param {Number} opts.precision The number of decimal places of precision to
|
|
* include. Note: This is just clipping (i.e. floor) instead of rounding.
|
|
* TODO: round
|
|
* @param {Boolean} opts.narrow Make it as narrow as possible: short units,
|
|
* no space between value and unit, drop precision if it is all zeros.
|
|
*/
|
|
function humanSizeFromBytes(opts, bytes) {
|
|
if (bytes === undefined) {
|
|
opts = {};
|
|
bytes = opts;
|
|
}
|
|
assert.number(bytes, 'bytes');
|
|
// The number of decimal places, default 1.
|
|
assert.optionalNumber(opts.precision, 'opts.precision');
|
|
var precision = opts.precision === undefined ? 1 : opts.precision;
|
|
assert.ok(precision >= 0);
|
|
assert.optionalBool(opts.narrow, 'opts.narrow');
|
|
|
|
var sizes = ['B', 'KiB', 'MiB', 'GiB', 'TiB', 'PiB'];
|
|
if (opts.narrow) {
|
|
sizes = ['B', 'K', 'M', 'G', 'T', 'P'];
|
|
}
|
|
var template = opts.narrow ? '%s%s' : '%s %s';
|
|
|
|
if (bytes === 0) {
|
|
return '0 B';
|
|
}
|
|
|
|
var i = Number(Math.floor(Math.log(bytes) / Math.log(1024)));
|
|
var s = String(bytes / Math.pow(1024, i));
|
|
var hasDecimal = s.indexOf('.') !== -1;
|
|
if (precision === 0) {
|
|
if (hasDecimal) {
|
|
s = s.slice(0, s.indexOf('.'));
|
|
}
|
|
} else if (opts.narrow && !hasDecimal) {
|
|
/* skip all-zero precision */
|
|
} else {
|
|
if (!hasDecimal) {
|
|
s += '.';
|
|
}
|
|
var places = s.length - s.indexOf('.') - 1;
|
|
while (places < precision) {
|
|
s += '0';
|
|
places++;
|
|
}
|
|
if (places > precision) {
|
|
s = s.slice(0, s.length - places + precision);
|
|
}
|
|
}
|
|
//var precision1 = (s.indexOf('.') === -1
|
|
// ? s + '.0' : s.slice(0, s.indexOf('.') + 2));
|
|
|
|
return format(template, s, sizes[i]);
|
|
}
|
|
|
|
function capitalize(s) {
|
|
return s[0].toUpperCase() + s.substr(1);
|
|
}
|
|
|
|
/*
|
|
* Normalize a short ID. Returns undefined if the given string isn't a valid
|
|
* short id.
|
|
*
|
|
* Short IDs:
|
|
* - UUID prefix
|
|
* - allow '-' to be elided (to support using containers IDs from
|
|
* docker)
|
|
* - support docker ID *longer* than a UUID? The curr implementation does.
|
|
*/
|
|
function normShortId(s) {
|
|
var shortIdCharsRe = /^[a-f0-9]+$/;
|
|
var shortId;
|
|
if (s.indexOf('-') === -1) {
|
|
if (!shortIdCharsRe.test(s)) {
|
|
return;
|
|
}
|
|
shortId = s.substr(0, 8) + '-'
|
|
+ s.substr(8, 4) + '-'
|
|
+ s.substr(12, 4) + '-'
|
|
+ s.substr(16, 4) + '-'
|
|
+ s.substr(20, 12);
|
|
shortId = shortId.replace(/-+$/, '');
|
|
} else {
|
|
// UUID prefix.
|
|
var shortId = '';
|
|
var chunk;
|
|
var remaining = s;
|
|
var spans = [8, 4, 4, 4, 12];
|
|
for (var i = 0; i < spans.length; i++) {
|
|
var span = spans[i];
|
|
head = remaining.slice(0, span);
|
|
remaining = remaining.slice(span + 1);
|
|
if (!shortIdCharsRe.test(head)) {
|
|
return;
|
|
}
|
|
shortId += head;
|
|
if (remaining) {
|
|
shortId += '-';
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return shortId;
|
|
}
|
|
|
|
|
|
|
|
//---- exports
|
|
|
|
module.exports = {
|
|
UUID_RE: UUID_RE,
|
|
objCopy: objCopy,
|
|
deepObjCopy: deepObjCopy,
|
|
zeroPad: zeroPad,
|
|
boolFromString: boolFromString,
|
|
jsonStream: jsonStream,
|
|
kvToObj: kvToObj,
|
|
longAgo: longAgo,
|
|
isUUID: isUUID,
|
|
humanDurationFromMs: humanDurationFromMs,
|
|
humanSizeFromBytes: humanSizeFromBytes,
|
|
capitalize: capitalize,
|
|
normShortId: normShortId
|
|
};
|
|
// vim: set softtabstop=4 shiftwidth=4:
|