> Well, you could, but it may be easier to copy the structure from a
different program, e.g. programs/ping/ping_main.c.

I considered this choice at first, and I read some of the command line parsing patterns from other files. But robocopy has covered almost all kinds of dos-style command line flags:
- flag with no argument, eg: /x
- colon separated argument, eg: /x:10
- space separated argument list, eg: /x arg1 arg2

The three types are all needed by Waves Central or Scoop.

I didn't find a program which has to deal with such complex parsing, and the complexity to write a structure to parse all three kinds of flags seems to be similar to implementing a dos-style `getopt`. Besides, `getopt` is something standard, and I can refer to lots of implementations. If a dos-style `getopt` is done, maybe it could help new programs or improve existing programs.

I think I could do my test of `getopt` somewhere else, and copy tested code to the wine project. `getopt` is not hard/complex, and there are standard implementations which are proved to be right.

Unittest of such a little program may be too cumbersome. ;)

Weiwen

Zebediah Figura (she/her) <zfigura@codeweavers.com> 于2021年6月26日周六 下午11:52写道：
Hello Weiwen,

On 6/26/21 6:38 AM, Weiwen Chen wrote:
> Hi everyone:
> I'm Weiwen Chen from Fudan University and I'm working on adding
> `robocopy.exe` into wine. I stage my work on my github fork
> <https://github.com/ofey404/wine/tree/robocopy>.
>
> This program accepts complex command line arguments, so I'm trying to
> implement my own `getopt` function which accepts dos-style flags(beginning
> with slash, like `/x`).

Well, you could, but it may be easier to copy the structure from a
different program, e.g. programs/ping/ping_main.c.

> The dummy code is under programs/robocopy
> <https://github.com/ofey404/wine/tree/robocopy/programs/robocopy>
> directory. And I want to add some unittest of `getopt_long()`, in
> robocopy/tests/getopt.c
> <https://github.com/ofey404/wine/blob/fe4a71850b023eefadab5ce357ce4671c1fffc72/programs/robocopy/tests/getopt.c#L21>.
> I try to import my source code of `getopt.c` relatively into unit test
> file, but I failed with error message like this:
>
> ../wine-git/programs/robocopy/tests/getopt.c:20: error: #include directive
> with relative path not allowed
>
> How can I include my source file correctly into the test? Maybe I should
> configure something in the `configure` script, but I don't know how to do
> it.
>
> I've read some of the builtin programs, but they seldom have a separate
> `test/` directory, and I don't find examples of unit tests.

We don't really do unit tests of internal functions at all. Maybe
there's an argument for it, but I suspect in this case at least it's not
really necessary.