Re: [PATCH v4 6/9] hook: add 'run' subcommand

> In order to enable hooks to be run as an external process, by a
> standalone Git command, or by tools which wrap Git, provide an external
> means to run all configured hook commands for a given hook event.
> 
> For now, the hook commands will in config order, in series. As alternate
> ordering or parallelism is supported in the future, we should add knobs
> to use those to the command line as well.
> 
> As with the legacy hook implementation, all stdout generated by hook
> commands is redirected to stderr. Piping from stdin is not yet
> supported.
> 
> Legacy hooks (those present in $GITDIR/hooks) are run at the end of the
> execution list. For now, there is no way to disable them.
> 
> Users may wish to provide hook commands like 'git config
> hook.pre-commit.command "~/linter.sh --pre-commit"'. To enable this, the
> contents of the 'hook.*.command' and 'hookcmd.*.command' strings are
> first split by space or quotes into an argv_array, then expanded with
> 'expand_user_path()'.
> 

> diff --git a/t/t1360-config-based-hooks.sh b/t/t1360-config-based-hooks.sh
> index ebf8f38d68..ee8114250d 100755
> --- a/t/t1360-config-based-hooks.sh
> +++ b/t/t1360-config-based-hooks.sh
> @@ -84,4 +84,32 @@ test_expect_success 'git hook list --porcelain prints just the command' '
>   	test_cmp expected actual
>   '
>   
> +test_expect_success 'inline hook definitions execute oneliners' '
> +	test_config hook.pre-commit.command "echo \"Hello World\"" &&
> +
> +	echo "Hello World" >expected &&
> +
> +	# hooks are run with stdout_to_stderr = 1
> +	git hook run pre-commit 2>actual &&
> +	test_cmp expected actual
> +'
> +
> +test_expect_success 'inline hook definitions resolve paths' '
> +	cat >~/sample-hook.sh <<-EOF &&
> +	echo \"Sample Hook\"
> +	EOF

> +	test_when_finished "rm ~/sample-hook.sh" &&
> +
> +	chmod +x ~/sample-hook.sh &&
> +
> +	test_config hook.pre-commit.command "~/sample-hook.sh" &&
> +
> +	echo \"Sample Hook\" >expected &&
> +
> +	# hooks are run with stdout_to_stderr = 1
> +	git hook run pre-commit 2>actual &&
> +	test_cmp expected actual
> +'
> +
>   test_done
>