[PATCH 1/3] cmd: test: allow using [ as alias for test

[Quentin Schulz]

Hi Rasmus,

On 3/11/26 1:09 PM, Rasmus Villemoes wrote:
> I often find myself writing something like
> 
>    if [ "$somevar" = 123 ] ; then ...
> 
> only to realize that that syntax doesn't work in U-Boot shell, and
> must be spelled
> 
>    if test "$somevar" = 123 ; then
> 
> It only takes a few lines of code to support this POSIX-standardized
> alias for test, and helps developers focus on their actual problems
> instead of dealing with such unexpected quirks of the shell.
> 
> Signed-off-by: Rasmus Villemoes <ravi at prevas.dk>
> ---
>   cmd/test.c | 19 +++++++++++++++++++

Please don't forget to update the docs. It still states "Unlike in 
ordinary shells, it cannot be spelled [.", c.f. 
https://docs.u-boot.org/en/latest/usage/cmd/test.html#description. The 
synopsis should also have a few examples using the new syntax.

Another question is if you have thought about/tested multi-expressions?

e.g.

[ aaa = aaa -a bbb = bbb ]

and possibly also

[ ! aaa = aaa ]

which I'm assuming should be equivalent to [ aaa != aaa ] (of course 
this test doesn't make much sense, but there seems to be support for the 
-e operator for checking file existence). I think adding tests for those 
would be nice too?

Cheers,
Quentin