Re: [PATCH 3/4] branch: add --dry-run option to branch

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Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx> writes:

> On Mon, Nov 22 2021, Glen Choo wrote:
>
>> Add a --dry-run option to branch creation that can check whether or not
>> a branch name and start point would be valid for a repository without
>> creating a branch. Refactor cmd_branch() to make the chosen action more
>> obvious.
>> [...]
>> -'git branch' [--track | --no-track] [-f] <branchname> [<start-point>]
>> +'git branch' [--track | --no-track] [-f] [--dry-run | -n] <branchname> [<start-point>]
>>  'git branch' (--set-upstream-to=<upstream> | -u <upstream>) [<branchname>]
>>  'git branch' --unset-upstream [<branchname>]
>>  'git branch' (-m | -M) [<oldbranch>] <newbranch>
>> @@ -205,6 +205,12 @@ This option is only applicable in non-verbose mode.
>>  --no-abbrev::
>>  	Display the full sha1s in the output listing rather than abbreviating them.
>>  
>> +-n::
>> +--dry-run::
>> +	Can only be used when creating a branch. If the branch creation
>> +	would fail, show the relevant error message. If the branch
>> +	creation would succeed, show nothing.
>> +
>
> The usage & test show that we've got --dry-run for branch creation, but
> not the "creation" we do on --copy or --move.

Perhaps this is more of a wording issue i.e. 'creating a branch' is too
unspecific. Maybe 

	Can only be used when creating a new branch (without copying or moving
	an existing branch). If the branch creation would fail, show the
	relevant error message. If the branch creation would succeed, show
	nothing.

> In any case, any reason to leave those out?

No long term reason. I left those out because "create brand new branch
with --dry-run" was needed right now, but the others are not. For
consistency, we'd want --dry-run for all other actions, including copy,
move, delete, etc.




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