Obey precedence rules in which; Fix #2875 (#2885)

* Obay precedence rules in which; Fix #2875

Before which did not obay the precedence of alias before def commands.
Furthermore, `which -a echo` would only report either an alias or a def command or an
internal command with the provided name. Not all.

With this commit applied its fixed :)

Example:
```shell
/home/leo/repos/nushell(fix/which_reports_wrong_usage)> def echo [] {^echo hi}
/home/leo/repos/nushell(fix/which_reports_wrong_usage)> echo
hi
/home/leo/repos/nushell(fix/which_reports_wrong_usage)> which -a echo
───┬──────┬──────────────────────────┬─────────
 # │ arg  │           path           │ builtin
───┼──────┼──────────────────────────┼─────────
 0 │ echo │ Nushell custom command   │ No
 1 │ echo │ Nushell built-in command │ Yes
 2 │ echo │ /usr/bin/echo            │ No
───┴──────┴──────────────────────────┴─────────
/home/leo/repos/nushell(fix/which_reports_wrong_usage)> alias echo = ^echo hi there
/home/leo/repos/nushell(fix/which_reports_wrong_usage)> echo
hi there
/home/leo/repos/nushell(fix/which_reports_wrong_usage)> which -a echo
───┬──────┬──────────────────────────┬─────────
 # │ arg  │           path           │ builtin
───┼──────┼──────────────────────────┼─────────
 0 │ echo │ Nushell alias            │ No
 1 │ echo │ Nushell custom command   │ No
 2 │ echo │ Nushell built-in command │ Yes
 3 │ echo │ /usr/bin/echo            │ No
───┴──────┴──────────────────────────┴─────────
```

* Fix clippy lint

* Fix vec always Some even if empty
This commit is contained in:
Leonhard Kipp
2021-01-08 18:44:31 +01:00
committed by GitHub
parent 0e13d9fbaa
commit 5356cb9fbd
4 changed files with 250 additions and 39 deletions

View File

@ -56,5 +56,6 @@ mod touch;
mod uniq;
mod update;
mod where_;
mod which;
mod with_env;
mod wrap;