Re: [PATCH] send-email: add proper default sender

> On Tue, Nov 13, 2012 at 12:42:02AM +0100, Felipe Contreras wrote:
>
>> > Why not use Git::ident_person() here? It saves some code, and would also
>> > respect environment variables. Or better yet...
>>
>> I assume there was a reason why that code was asking for input;
>> precisely because it would use the environment variables. For some
>> reason the user might have exported GIT_AUTHOR_EMAIL, or maybe EMAIL
>> is not right, or the full name config.
>>
>> OTOH user.name/.email configurations come clearly from the user.
>
> But we use the environment to default the field, so the distinction
> doesn't make much sense to me.  Plus, it has always been the case that
> you can use git without setting user.*, but instead only using the
> environment. I don't see any reason not to follow that principle here,
> too.

> The one distinction that would make sense to me is pausing to ask when
> we use "implicit" methods to look up the ident, like concatenating the
> username with the hostname to get the email.
>
> Git::ident uses "git var" to do its lookup, which will use IDENT_STRICT;
> that stops most junk like empty names and bogus domains. But I think we
> would want to go one step further and actually check
> user_ident_sufficiently_given.  Unfortunately, that is not currently
> available outside of C. You'd probably want something like:
>
> diff --git a/builtin/var.c b/builtin/var.c
> index aedbb53..eaf324e 100644
> --- a/builtin/var.c
> +++ b/builtin/var.c
> @@ -26,6 +26,12 @@ static const char *pager(int flag)
>         return pgm;
>  }
>
> +static const char *explicit_ident(int flag)
> +{
> +       git_committer_info(flag);
> +       return user_ident_sufficiently_given() ? "1" : "0";
> +}
> +
>  struct git_var {
>         const char *name;
>         const char *(*read)(int);
> @@ -35,6 +41,7 @@ static struct git_var git_vars[] = {
>         { "GIT_AUTHOR_IDENT",   git_author_info },
>         { "GIT_EDITOR", editor },
>         { "GIT_PAGER", pager },
> +       { "GIT_EXPLICIT_IDENT", explicit_ident },
>         { "", NULL },
>  };