Re: [PATCHv3 1/2] config: add '--names-only' option to list only variable names

> 'git config' can only show values or name-value pairs, so if a shell
> script needs the names of set config variables it has to run 'git config
> --list' or '--get-regexp' and parse the output to separate config
> variable names from their values.  However, such a parsing can't cope
> with multi-line values.  Though 'git config' can produce null-terminated
> output for newline-safe parsing, that's of no use in such a case, becase
> shells can't cope with null characters.
> 
> Even our own bash completion script suffers from these issues.
> 
> Help the completion script, and shell scripts in general, by introducing
> the '--names-only' option to modify the output of '--list' and
> '--get-regexp' to list only the names of config variables, so they don't
> have to perform error-prone post processing to separate variable names
> from their values anymore.