Ronnie Sahlberg wrote:

> Add a new flag REFLOG_EMAIL_IS_COMMITTER to _update_reflog to tell it
> that what we pass in as email is already the fully baked committer string
> we can use as-is.

With and without the new flag, the 'email' argument has two different

 * with the new flag, it should be an ident string, like
   'Jonathan Nieder <> 1406251347 -0700'

 * without it, it should be the name-part of an ident string,
   like 'Jonathan Nieder <>

In neither case is it an email address.  This seems unnecessarily

Is the caller responsible for checking the argument for validity?
Do callers do so?  Is this performance-critical or could the
transaction_update_reflog function do a sanity-check?

>  /*
>   * Append a reflog entry for refname. If the REFLOG_TRUNCATE flag is set
>   * this update will first truncate the reflog before writing the entry.
>   * If msg is NULL no update will be written to the log.
>   */
>  int transaction_update_reflog(struct ref_transaction *transaction,
>                                const char *refname,
>                                const unsigned char *new_sha1,
>                                const unsigned char *old_sha1,
>                                const char *email,
>                                unsigned long timestamp, int tz,
>                                const char *msg, int flags,
>                                struct strbuf *err);

This is a lot of parameters, some optional, not all documented.  Would
it make sense to pack some into a struct?

Thanks and hope that helps,
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