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const path = require('path')
// String -> String
// @url examples:
// - https://registry.yarnpkg.com/acorn-es7-plugin/-/acorn-es7-plugin-1.1.7.tgz
// - https://registry.npmjs.org/acorn-es7-plugin/-/acorn-es7-plugin-1.1.7.tgz
// - git+https://github.com/srghma/node-shell-quote.git
// - git+https://1234user:1234pass@git.graphile.com/git/users/1234user/postgraphile-supporter.git
// - https://codeload.github.com/Gargron/emoji-mart/tar.gz/934f314fd8322276765066e8a2a6be5bac61b1cf
function urlToName(url) {
// Yarn generates `codeload.github.com` tarball URLs, where the final
// path component (file name) is the git hash. See #111.
// See also https://github.com/yarnpkg/yarn/blob/989a7406/src/resolvers/exotics/github-resolver.js#L24-L26
let isCodeloadGitTarballUrl =
url.startsWith('https://codeload.github.com/') && url.includes('/tar.gz/')
if (url.startsWith('git+') || isCodeloadGitTarballUrl) {
return path.basename(url)
}
return url
.replace('https://registry.yarnpkg.com/', '') // prevents having long directory names
.replace(/[@/:-]/g, '_') // replace @ and : and - characters with underscore
}
module.exports = urlToName
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