Re: [PATCH v3 4/4] config: add '--show-scope' to print the scope of a config value

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"Matthew Rogers via GitGitGadget" <gitgitgadget@xxxxxxxxx> writes:

> +--show-scope::
> +	Similar to `--show-origin` in that it augments the output of
> +	all queried config options with the scope of that value 
> +	(local, global, system, command).
> +
>  --get-colorbool name [stdout-is-tty]::
>  
>  	Find the color setting for `name` (e.g. `color.diff`) and output
> diff --git a/builtin/config.c b/builtin/config.c
> index 52a904cfb1..d5931061e8 100644
> --- a/builtin/config.c
> +++ b/builtin/config.c
> @@ -33,6 +33,7 @@ static int end_nul;
>  static int respect_includes_opt = -1;
>  static struct config_options config_options;
>  static int show_origin;
> +static int show_scope;
>  
>  #define ACTION_GET (1<<0)
>  #define ACTION_GET_ALL (1<<1)
> @@ -155,6 +156,7 @@ static struct option builtin_config_options[] = {
>  	OPT_BOOL(0, "name-only", &omit_values, N_("show variable names only")),
>  	OPT_BOOL(0, "includes", &respect_includes_opt, N_("respect include directives on lookup")),
>  	OPT_BOOL(0, "show-origin", &show_origin, N_("show origin of config (file, standard input, blob, command line)")),
> +	OPT_BOOL(0, "show-scope", &show_scope, N_("show scope of config (worktree, local, global, system, command)")),
>  	OPT_STRING(0, "default", &default_value, N_("value"), N_("with --get, use default value when missing entry")),
>  	OPT_END(),
>  };
> @@ -189,11 +191,43 @@ static void show_config_origin(struct strbuf *buf)
>  	strbuf_addch(buf, term);
>  }
>  
> +static const char *scope_to_string(enum config_scope scope)
> +{
> +	switch (scope) {
> +	case CONFIG_SCOPE_LOCAL:
> +		return "local";
> +	case CONFIG_SCOPE_GLOBAL:
> +		return "global";
> +	case CONFIG_SCOPE_SYSTEM:
> +		return "system";
> +	case CONFIG_SCOPE_WORKTREE:
> +		return "worktree";
> +	case CONFIG_SCOPE_COMMAND:
> +		return "command";
> +	case CONFIG_SCOPE_SUBMODULE:
> +		return "submodule";
> +	default:
> +		return "unknown";
> +	}
> +}

It is a shame that with this defined in the main part of the system
test-tool still needs to carry its own private copy.

I wonder if it results in a better system if we rename this to

	const char *config_scope_name(enum config_scope scope)

made it externally visible, and use it in t/helper/test-config.c
and get rid of the private copy scope_name() there?

> diff --git a/config.h b/config.h
> index f383a71404..91f851e925 100644
> --- a/config.h
> +++ b/config.h
> @@ -35,10 +35,21 @@ struct object_id;
>  
>  #define CONFIG_REGEX_NONE ((void *)1)
>  
> +enum config_scope {
> +	CONFIG_SCOPE_UNKNOWN = 0,
> +	CONFIG_SCOPE_SYSTEM,
> +	CONFIG_SCOPE_GLOBAL,
> +	CONFIG_SCOPE_LOCAL,
> +	CONFIG_SCOPE_WORKTREE,
> +	CONFIG_SCOPE_COMMAND,
> +	CONFIG_SCOPE_SUBMODULE,
> +};
> +

And this is the logical place to make an external definition, if we
were to go that route.

> diff --git a/t/t1300-config.sh b/t/t1300-config.sh
> index 983a0a1583..b654a6d2f9 100755
> --- a/t/t1300-config.sh
> +++ b/t/t1300-config.sh
> @@ -1766,6 +1766,64 @@ test_expect_success !MINGW '--show-origin blob ref' '
>  	test_cmp expect output
>  '
>  
> +test_expect_success '--show-scope with --list' '
> +	cat >expect <<-EOF &&
> +		global	user.global=true
> +		global	user.override=global
> +		global	include.path=$INCLUDE_DIR/absolute.include
> +		global	user.absolute=include
> +		local	user.local=true
> +		local	user.override=local
> +		local	include.path=../include/relative.include
> +		local	user.relative=include
> +		command	user.cmdline=true
> +	EOF

The HERE-DOC is over-indented.  All the body lines should align with
cat and EOF.  The same comment applies to many "<<-" added by this
patch---mimick the "<<-" that appear in earlier part of the same
file.

> +test_expect_success !MINGW '--show-scope with --blob' '
> +	blob=$(git hash-object -w "$CUSTOM_CONFIG_FILE") &&
> +	cat >expect <<-EOF &&
> +		command	user.custom=true
> +	EOF
> +	git config --blob=$blob --show-scope --list >output &&
> +	test_cmp expect output
> +'

Missing blank line between two tests.

I wonder if we want to revamp the tests for --show-origin that wants
to make sure a funny filename is quoted properly.  For that purpose,
CUSTOM_CONFIG_FILE is given a funny pathname, and it would have been
OK to use that only for a single "do we quote properly?" test, but
instead we use that same funnily-named file as the source in many
places where we do not *care* how --show-origin quotes the pathname
at all, and end up having to skip with !MINGW.

It's a bad tradition that started at 45bf3297 ("t1300: fix the new
--show-origin tests on Windows", 2016-03-23), I guess, and is not a
new problem introduced by this patch, but it should stop so that we
can have a better test coverage everywhere.

Other than that, I think that the new feature added by this series
is a sensible one.  Thanks for working on it.




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