Re: [PATCH v3 05/12] hook: include hooks from the config

> Teach the hook.[hc] library to parse configs to populate the list of
> hooks to run for a given event.
> 
> Multiple commands can be specified for a given hook by providing
> "hook.<friendly-name>.command = <path-to-hook>" and
> "hook.<friendly-name>.event = <hook-event>" lines.
> 
> Hooks will be started in config order of the "hook.<friendly-name>.event"
> lines and will be run sequentially (.jobs == 1) like before.
> Running the hooks in parallel will be enabled in a future patch.
> 
> The "traditional" hook from the hookdir is run last, if present.
> 
> A strmap cache is added to struct repository to avoid re-reading
> the configs on each rook run. This is useful for hooks like the
> ref-transaction which gets executed multiple times per process.
> 
> Examples:
> 
>   $ git config --get-regexp "^hook\."
>   hook.bar.command=~/bar.sh
>   hook.bar.event=pre-commit
> 
>   # Will run ~/bar.sh, then .git/hooks/pre-commit
>   $ git hook run pre-commit
> 
> Signed-off-by: Emily Shaffer <emilyshaffer@google.com>
> Signed-off-by: Adrian Ratiu <adrian.ratiu@collabora.com>
> ---

> diff --git a/t/t1800-hook.sh b/t/t1800-hook.sh
> index d1380a4f0e..3a95cfe16d 100755
> --- a/t/t1800-hook.sh
> +++ b/t/t1800-hook.sh
> @@ -1,10 +1,26 @@
>  #!/bin/sh
>  
> -test_description='git-hook command'
> +test_description='git-hook command and config-managed multihooks'
>  
>  . ./test-lib.sh
>  . "$TEST_DIRECTORY"/lib-terminal.sh
>  
> +setup_hooks () {
> +	test_config hook.ghi.command "/path/ghi"
> +	test_config hook.ghi.event pre-commit --add
> +	test_config hook.ghi.event test-hook --add
> +	test_config_global hook.def.command "/path/def"
> +	test_config_global hook.def.event pre-commit --add
> +}
> +
> +setup_hookdir () {
> +	mkdir .git/hooks
> +	write_script .git/hooks/pre-commit <<-EOF
> +	echo \"Legacy Hook\"
> +	EOF
> +	test_when_finished rm -rf .git/hooks
> +}