The check that the resolved version actually matches the request used an unanchored substring match on the raw pattern,
so `nvm install 20` could accept `v10.20.0` when a remote list's row was selected by a `v20` in its LTS column and no 20.x rows were present.
Match the `v`-prefixed pattern followed by a non-digit against the version instead,
the same way `nvm_ls_remote_index_tab` normalizes it,
so `20` no longer matches `v10.20.0` or `v200.0.0`,
while regex-style requests like `4.*` and `v[68]`,
and a trailing dot like `8.`, keep working.
This also fixes `iojs-1` and `iojs-3`,
which previously resolved to N/A because `iojs-3` is not a substring of `iojs-v3.3.1`.
Discovered by Anthropic's OSS Scanner, as bug ANT-2026-7GFFYVJP; the scanner correctly classified it as not a vulnerability.
Add `try` and `try_err` helper functions to `test/common.sh` that capture stdout/stderr and exit code from a single invocation, eliminating duplicate command executions in tests.
Convert all existing tests that used the `OUTPUT`/`EXIT_CODE` double-invocation pattern to use the new helpers.
Also fixes a pre-existing bug in the `nvm_die_on_prefix` test where ASCII apostrophes were used instead of U+2019 to match nvm.sh output.
nvm.sh uses `NVM_SCRIPT_SOURCE="$_"` to detect its source location.
Adding `: nvm.sh` before each source line ensures `$_` is set correctly, preventing breakage when the previous command (e.g., `set -ex`) overwrites it.
Previously, `nvm install Argon` would succeed by matching the LTS name
in the version description (e.g., "v4.9.1 (Latest LTS: Argon)"), but
`nvm uninstall Argon` would fail because "Argon" is not a valid alias or not a valid version.
Changes:
- Added pattern matching check in nvm_remote_version (nvm.sh:785-791)
- Skips check for implicit aliases (node, stable, etc.) to preserve
existing functionality
- Added unit tests to verify LTS names are rejected while version
numbers still work
After this fix:
- `nvm install Argon` → fails (use `nvm install lts/argon` instead)
- `nvm install 4` → still works
- `nvm install node` → still works
- `nvm install lts/argon` → still works
This makes install and uninstall behavior consistent.
Fixes#3474.
Jordan Harband
Rahul Beniwal
Peter Dave Hello
Qiangjun Ran