82 lines
2.7 KiB
JavaScript
82 lines
2.7 KiB
JavaScript
const url = require('url')
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const lastIndexOfBefore = (str, char, beforeChar) => {
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const startPosition = str.indexOf(beforeChar)
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return str.lastIndexOf(char, startPosition > -1 ? startPosition : Infinity)
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}
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const safeUrl = (u) => {
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try {
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return new url.URL(u)
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} catch {
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// this fn should never throw
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}
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}
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// accepts input like git:github.com:user/repo and inserts the // after the first :
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const correctProtocol = (arg, protocols) => {
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const firstColon = arg.indexOf(':')
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const proto = arg.slice(0, firstColon + 1)
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if (Object.prototype.hasOwnProperty.call(protocols, proto)) {
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return arg
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}
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if (arg.substr(firstColon, 3) === '://') {
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// If arg is given as <foo>://<bar>, then this is already a valid URL.
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return arg
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}
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const firstAt = arg.indexOf('@')
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if (firstAt > -1) {
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if (firstAt > firstColon) {
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// URL has the form of <foo>:<bar>@<baz>. Assume this is a git+ssh URL.
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return `git+ssh://${arg}`
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} else {
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// URL has the form 'git@github.com:npm/hosted-git-info.git'.
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return arg
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}
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}
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// Correct <foo>:<bar> to <foo>://<bar>
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return `${arg.slice(0, firstColon + 1)}//${arg.slice(firstColon + 1)}`
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}
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// attempt to correct an scp style url so that it will parse with `new URL()`
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const correctUrl = (giturl) => {
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// ignore @ that come after the first hash since the denotes the start
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// of a committish which can contain @ characters
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const firstAt = lastIndexOfBefore(giturl, '@', '#')
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// ignore colons that come after the hash since that could include colons such as:
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// git@github.com:user/package-2#semver:^1.0.0
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const lastColonBeforeHash = lastIndexOfBefore(giturl, ':', '#')
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if (lastColonBeforeHash > firstAt) {
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// the last : comes after the first @ (or there is no @)
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// like it would in:
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// proto://hostname.com:user/repo
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// username@hostname.com:user/repo
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// :password@hostname.com:user/repo
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// username:password@hostname.com:user/repo
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// proto://username@hostname.com:user/repo
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// proto://:password@hostname.com:user/repo
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// proto://username:password@hostname.com:user/repo
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// then we replace the last : with a / to create a valid path
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giturl = giturl.slice(0, lastColonBeforeHash) + '/' + giturl.slice(lastColonBeforeHash + 1)
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}
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if (lastIndexOfBefore(giturl, ':', '#') === -1 && giturl.indexOf('//') === -1) {
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// we have no : at all
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// as it would be in:
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// username@hostname.com/user/repo
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// then we prepend a protocol
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giturl = `git+ssh://${giturl}`
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}
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return giturl
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}
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module.exports = (giturl, protocols) => {
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const withProtocol = protocols ? correctProtocol(giturl, protocols) : giturl
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return safeUrl(withProtocol) || safeUrl(correctUrl(withProtocol))
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}
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