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Date:   Fri, 2 Jun 2017 10:00:52 +0300
From:   Konstantin Khomoutov <kostix+git@007spb.ru>
To:     Jeffrey Walton <noloader@gmail.com>
Cc:     Git List <git@vger.kernel.org>,
        Davide Fiorentino <davide.fiorentino@gmail.com>
Subject: Re: How to avoid "Please tell me who you are..."?
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On Fri, Jun 02, 2017 at 02:02:22AM -0400, Jeffrey Walton wrote:

> I'm working on a test machine. It mostly needs to be a clone of
> upstream. On occasion it needs to test a particular commit.
> 
> When I attempt to test a commit it produces:
> 
>     $ git cherry-pick eb3b27a6a543
> 
>     *** Please tell me who you are.
[...]
> This is a nameless test account, so there is no information to provide.
> 
> How do I tell Git to ignore these checks?
[...]
> Well, they don't exist so there's nothing to set.
> 
> The machine below its a CubieBoard used for testing. I remote into it
> with test@. As a matter of policy, no check-ins occur on it. Other
> than the password database and authroized_keys file, there is no
> information on it to be lost or stolen.

`git cherry-pick` wants to record a commit.  A commit in Git always
possess the information on "the committer" -- whoever recorded the
commit (it might be distinct from the commit author, as is the case with
cherry-picking).  There's no way to not set the committer.

I envision two ways to get around this situation:

1) Patch the ~/.whatevershellrc of your test account to set this
   information by setting and exporting the GIT_AUTHOR_NAME and
   GIT_AUTHOR_EMAIL env. variables (and may be others -- see the
   "git" manual page; run `git help git`).
   
   May be even add it in /etc/skel to make all accounts create inherit
   it.

2) Set these parameters in the repository you're working with.

   While Git suggests you to pass "--global" to the `git config`
   invocations, it's perfectly OK to use "--local" with them (which is
   IIRC the default, if not supplied) to make these settings be recorded
   in the repository's configuration rather than in ~/.gitconfig.

3) Pass these options explicitly to Git invocations or make a shell
   alias which would do so, like with

   function git() {
     command git \
		-c user.name='Joe Tester' \
		-c user.email=tester@acme.corp \
		"$@"
   }

I'd personally go with (2).