`nvm_get_mirror` accepts `user:password@` in `$NVM_NODEJS_ORG_MIRROR` and `$NVM_IOJS_ORG_MIRROR`,
but `nvm_download_artifact` printed the full tarball URL in its "Downloading",
"download from ... failed",
and "HTTP 404 at URL" messages,
and `nvm debug` printed both mirror variables as-is,
so the credentials showed up in terminal output and build logs.
Add `nvm_sanitize_url`,
which replaces the userinfo part of any URL with `***@`,
and use it in those messages.
The download itself still uses the full URL,
so authenticating to the mirror keeps working.
The README now notes that `$NVM_AUTH_HEADER` is the recommended way to authenticate to a mirror
Discovered by Anthropic's OSS Scanner, as ANT-2026-X03SZ7C6; the scanner reported it as a vulnerability, but it is not one.
4a1f7d2875