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<h1 class="page-title">Source: services/php-version.js</h1>
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<pre class="prettyprint source linenums"><code>/**
* Utilities relating to PHP version numbers. This compares version numbers
* using the algorithm followed by Composer (see
* https://getcomposer.org/doc/04-schema.md#version).
*
* @module
*/
import { fetch } from '../core/base-service/got.js'
import { getCachedResource } from '../core/base-service/resource-cache.js'
import { listCompare } from './version.js'
import { omitv } from './text-formatters.js'
/**
* Return a negative value if v1 &lt; v2,
* zero if v1 = v2, a positive value otherwise.
*
* @param {string} v1 - First version for comparison
* @param {string} v2 - Second version for comparison
* @returns {number} Comparison result (-1, 0 or 1)
*/
function asciiVersionCompare(v1, v2) {
if (v1 &lt; v2) {
return -1
} else if (v1 > v2) {
return 1
} else {
return 0
}
}
/**
* Take a version without the starting v.
* eg, '1.0.x-beta'
* Return { numbers: [1,0,something big], modifier: 2, modifierCount: 1 }
*
* @param {string} version - Version number string
* @returns {object} Object containing version details
*/
function numberedVersionData(version) {
// A version has a numbered part and a modifier part
// (eg, 1.0.0-patch, 2.0.x-dev).
const parts = version.split('-')
const numbered = parts[0]
// Aliases that get caught here.
if (numbered === 'dev') {
return {
numbers: parts[1],
modifier: 5,
modifierCount: 1,
}
}
let modifierLevel = 3
let modifierLevelCount = 0
// Normalization based on
// https://github.com/composer/semver/blob/1.5.0/src/VersionParser.php
if (parts.length > 1) {
const modifier = parts[parts.length - 1]
const firstLetter = modifier.charCodeAt(0)
let modifierLevelCountString
// Modifiers: alpha &lt; beta &lt; RC &lt; normal &lt; patch &lt; dev
if (firstLetter === 97 || firstLetter === 65) {
// a / A
modifierLevel = 0
if (/^alpha/i.test(modifier)) {
modifierLevelCountString = +modifier.slice(5)
} else {
modifierLevelCountString = +modifier.slice(1)
}
} else if (firstLetter === 98 || firstLetter === 66) {
// b / B
modifierLevel = 1
if (/^beta/i.test(modifier)) {
modifierLevelCountString = +modifier.slice(4)
} else {
modifierLevelCountString = +modifier.slice(1)
}
} else if (firstLetter === 82 || firstLetter === 114) {
// R / r
modifierLevel = 2
modifierLevelCountString = +modifier.slice(2)
} else if (firstLetter === 112) {
// p
modifierLevel = 4
if (/^patch/.test(modifier)) {
modifierLevelCountString = +modifier.slice(5)
} else {
modifierLevelCountString = +modifier.slice(1)
}
} else if (firstLetter === 100) {
// d
modifierLevel = 5
if (/^dev/.test(modifier)) {
modifierLevelCountString = +modifier.slice(3)
} else {
modifierLevelCountString = +modifier.slice(1)
}
}
// If we got the empty string, it defaults to a modifier count of 1.
if (!modifierLevelCountString) {
modifierLevelCount = 1
} else {
modifierLevelCount = +modifierLevelCountString
}
}
/**
* Try to convert to a list of numbers.
*
* @param {string} s - Version number string
* @returns {number} Version number integer
*/
function toNum(s) {
let n = +s
if (Number.isNaN(n)) {
n = 0xffffffff
}
return n
}
const numberList = numbered.split('.').map(toNum)
return {
numbers: numberList,
modifier: modifierLevel,
modifierCount: modifierLevelCount,
}
}
/**
* Compares two versions and return an integer based on the result.
* See https://getcomposer.org/doc/04-schema.md#version
* and https://github.com/badges/shields/issues/319#issuecomment-74411045
*
* @param {string} v1 - First version
* @param {string} v2 - Second version
* @returns {number} Negative value if v1 &lt; v2, zero if v1 = v2, else a positive value
*/
function compare(v1, v2) {
// Omit the starting `v`.
const rawv1 = omitv(v1)
const rawv2 = omitv(v2)
let v1data, v2data
try {
v1data = numberedVersionData(rawv1)
v2data = numberedVersionData(rawv2)
} catch (e) {
return asciiVersionCompare(rawv1, rawv2)
}
// Compare the numbered part (eg, 1.0.0 &lt; 2.0.0).
const numbersCompare = listCompare(v1data.numbers, v2data.numbers)
if (numbersCompare !== 0) {
return numbersCompare
}
// Compare the modifiers (eg, alpha &lt; beta).
if (v1data.modifier &lt; v2data.modifier) {
return -1
} else if (v1data.modifier > v2data.modifier) {
return 1
}
// Compare the modifier counts (eg, alpha1 &lt; alpha3).
if (v1data.modifierCount &lt; v2data.modifierCount) {
return -1
} else if (v1data.modifierCount > v2data.modifierCount) {
return 1
}
return 0
}
/**
* Determines the latest version from a list of versions.
*
* @param {string[]} versions - List of versions
* @returns {string} Latest version
*/
function latest(versions) {
let latest = versions[0]
for (let i = 1; i &lt; versions.length; i++) {
if (compare(latest, versions[i]) &lt; 0) {
latest = versions[i]
}
}
return latest
}
/**
* Determines if a version is stable or not.
*
* @param {string} version - Version number
* @returns {boolean} true if version is stable, else false
*/
function isStable(version) {
const rawVersion = omitv(version)
let versionData
try {
versionData = numberedVersionData(rawVersion)
} catch (e) {
return false
}
// normal or patch
return versionData.modifier === 3 || versionData.modifier === 4
}
/**
* Checks if a version is valid and returns the minor version.
*
* @param {string} version - Version number
* @returns {string} Minor version
*/
function minorVersion(version) {
const result = version.match(/^(\d+)(?:\.(\d+))?(?:\.(\d+))?/)
if (result === null) {
return ''
}
return `${result[1]}.${result[2] ? result[2] : '0'}`
}
/**
* Reduces the list of php versions that intersect with release versions to a version range (for eg. '5.4 - 7.1', '>= 5.5').
*
* @param {string[]} versions - List of php versions
* @param {string[]} phpReleases - List of php release versions
* @returns {string[]} Reduced Version Range (for eg. ['5.4 - 7.1'], ['>= 5.5'])
*/
function versionReduction(versions, phpReleases) {
if (!versions.length) {
return []
}
// versions intersect
versions = Array.from(new Set(versions))
.filter(n => phpReleases.includes(n))
.sort()
// nothing to reduction
if (versions.length &lt; 2) {
return versions
}
const first = phpReleases.indexOf(versions[0])
const last = phpReleases.indexOf(versions[versions.length - 1])
// no missed versions
if (first + versions.length - 1 === last) {
if (last === phpReleases.length - 1) {
return [`>= ${versions[0][2] === '0' ? versions[0][0] : versions[0]}`] // 7.0 -> 7
}
return [`${versions[0]} - ${versions[versions.length - 1]}`]
}
return versions
}
/**
* Fetches the PHP release versions from cache if exists, else fetch from the source url and save in cache.
*
* @async
* @param {object} githubApiProvider - Github API provider
* @returns {Promise&lt;*>} Promise that resolves to parsed response
*/
async function getPhpReleases(githubApiProvider) {
return getCachedResource({
url: '/repos/php/php-src/git/refs/tags',
scraper: tags =>
Array.from(
new Set(
tags
// only releases
.filter(
tag => tag.ref.match(/^refs\/tags\/php-\d+\.\d+\.\d+$/) != null,
)
// get minor version of release
.map(tag => tag.ref.match(/^refs\/tags\/php-(\d+\.\d+)\.\d+$/)[1]),
),
),
requestFetcher: githubApiProvider.fetch.bind(githubApiProvider, fetch),
})
}
export {
compare,
latest,
isStable,
minorVersion,
versionReduction,
getPhpReleases,
}
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