Re: ``git clean -xdf'' and ``make clean''

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On Tue, Feb 7, 2017 at 7:07 AM, Cornelius Weig
<cornelius.weig@xxxxxxxxxxx> wrote:
> On 02/07/2017 03:17 PM, Hongyi Zhao wrote:
>> Hi all,
>>
>> In order to delete all of the last build stuff, does the following two
>> methods equivalent or not?
>>
>> ``git clean -xdf'' and ``make clean''
>
> No, it is not equivalent.
>
> * `make clean` removes any build-related files (assuming that the
> `clean` target is properly written). To see exactly what it would do,
> run `make clean -n`. Judging from your question, I think this is what
> you want to do.
>
> * `git clean -xdf` would remove any files that git does not track. This
> also includes build-related files, but also any other files that happen
> to be in your working directory. For example, any output from `git
> format-patch` would be removed by this, but not `make clean`.

Make clean can run arbitrary code, and really depends on the
implementation. git clean -xdf will result in all non-tracked files
being removed, which should restore you to a pristine pre-build state.
However, this can have unfortunate side effect of destroying files
which you might not expect.

Properly written, a make clean shouldn't remove anything except what
could be regenerated by make. But that's just a strong convention.

Regards,
Jake



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