Re: [PATCH v7 3/4] alias: support non-alphanumeric names via subsection syntax

> Git alias names are limited to ASCII alphanumeric characters and
> dashes because aliases are implemented as config variable names.
> This prevents aliases being created in languages using characters
> outside that range.
>
> Add support for arbitrary alias names by using config subsections:
>
>     [alias "förgrena"]
>         command = branch
>
> The subsection name is matched as-is (case-sensitive byte comparison),
> while the existing definition without a subsection (e.g.,
> "[alias] co = checkout") remains case-insensitive for backward
> compatibility. This uses existing config infrastructure since
> subsections already support arbitrary bytes, and avoids introducing
> Unicode normalization.
>
> Also teach the help subsystem about the new syntax so that "git help
> -a" properly lists subsection aliases and the autocorrect feature can
> suggest them. Use utf8_strwidth() instead of strlen() for column
> alignment so that non-ASCII alias names display correctly.
>
> Suggested-by: Jeff King <peff@peff.net>
> Signed-off-by: Jonatan Holmgren <jonatan@jontes.page>
> ---
>  Documentation/config/alias.adoc | 50 ++++++++++++++++++++++-----
>  alias.c                         | 38 ++++++++++++++++----
>  help.c                          | 14 ++++++--
>  t/t0014-alias.sh                | 61 +++++++++++++++++++++++++++++++++
>  4 files changed, 145 insertions(+), 18 deletions(-)
>
> diff --git a/Documentation/config/alias.adoc b/Documentation/config/alias.adoc
> index 80ce17d2de..09a6499249 100644
> --- a/Documentation/config/alias.adoc
> +++ b/Documentation/config/alias.adoc
>[snip]
> +# With subsection (allows any characters, including UTF-8)
> +[alias "hämta"]
> +    command = fetch
> +[alias "rätta till"]
> +    command = commit --amend

> +----
> ++
> +With a Git alias defined, e.g.,
> +
> +    $ git config --global alias.last "cat-file commit HEAD"
> +    # Which is equivalent to
> +    $ git config --global alias.last.command "cat-file commit HEAD"
> +
> +`git last` is equivalent to `git cat-file commit HEAD`. To avoid

> +confusion and troubles with script usage, aliases that
> +hide existing Git commands are ignored except for deprecated
> +commands.  Arguments are split by
> +spaces, the usual shell quoting and escaping are supported.
> +A quote pair or a backslash can be used to quote them.
>[snip]