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module.exports = getUrl
function getUrl (r, forBrowser) {
if (!r) return null
// Regex taken from https://github.com/npm/npm-package-arg/commit/01dce583c64afae07b66a2a8a6033aeba871c3cd
// Note: This does not fully test the git ref format.
// See https://www.kernel.org/pub/software/scm/git/docs/git-check-ref-format.html
//
// The only way to do this properly would be to shell out to
// git-check-ref-format, and as this is a fast sync function,
// we don't want to do that. Just let git fail if it turns
// out that the commit-ish is invalid.
// GH usernames cannot start with . or -
if (/^[^@%\/\s\.-][^:@%\/\s]*\/[^@\s\/%]+(?:#.*)?$/.test(r)) {
if (forBrowser)
r = r.replace("#", "/tree/")
return "https://github.com/" + r
}
return null
}