Subject: Re: [PATCH 07/12] fsmonitor: refactor untracked-cache invalidation

From: Patrick Steinhardt <[email-masked]>
Date: Thu, 15 Feb 2024 10:32:35 +0100

On Tue, Feb 13, 2024 at 08:52:16PM +0000, Jeff Hostetler via GitGitGadget wrote:
> From: Jeff Hostetler <[email-masked]>
> 
> Signed-off-by: Jeff Hostetler <[email-masked]>

Junio already mentioned that this change does more than a mere
refactoring, which leaves the reader puzzled a bit.

> ---
>  fsmonitor.c | 38 ++++++++++++++++++++++++++------------
>  1 file changed, 26 insertions(+), 12 deletions(-)
> 
> diff --git a/fsmonitor.c b/fsmonitor.c
> index 754fe20cfd0..14585b6c516 100644
> --- a/fsmonitor.c
> +++ b/fsmonitor.c
> @@ -183,11 +183,35 @@ static int query_fsmonitor_hook(struct repository *r,
>  	return result;
>  }
>  
> +/*
> + * Invalidate the untracked cache for the given pathname.  Copy the
> + * buffer to a proper null-terminated string (since the untracked
> + * cache code does not use (buf, len) style argument).  Also strip any
> + * trailing slash.
> + */
> +static void my_invalidate_untracked_cache(
> +	struct index_state *istate, const char *name, int len)
> +{
> +	struct strbuf work_path = STRBUF_INIT;
> +
> +	if (!len)
> +		return;
> +
> +	if (name[len-1] == '/')
> +		len--;
> +
> +	strbuf_add(&work_path, name, len);
> +	untracked_cache_invalidate_path(istate, work_path.buf, 0);
> +	strbuf_release(&work_path);
> +}
> +
>  static void fsmonitor_refresh_callback_unqualified(
>  	struct index_state *istate, const char *name, int len, int pos)
>  {
>  	int i;
>  
> +	my_invalidate_untracked_cache(istate, name, len);
> +
>  	if (pos >= 0) {
>  		/*
>  		 * We have an exact match for this path and can just
> @@ -253,6 +277,8 @@ static int fsmonitor_refresh_callback_slash(
>  	int i;
>  	int nr_in_cone = 0;
>  
> +	my_invalidate_untracked_cache(istate, name, len);
> +
>  	if (pos < 0)
>  		pos = -pos - 1;
>  
> @@ -278,21 +304,9 @@ static void fsmonitor_refresh_callback(struct index_state *istate, char *name)
>  
>  	if (name[len - 1] == '/') {
>  		fsmonitor_refresh_callback_slash(istate, name, len, pos);
> -
> -		/*
> -		 * We need to remove the traling "/" from the path
> -		 * for the untracked cache.
> -		 */
> -		name[len - 1] = '\0';
>  	} else {
>  		fsmonitor_refresh_callback_unqualified(istate, name, len, pos);
>  	}

We can drop the braces here as both branches are now single-line
statements.

Patrick

> -
> -	/*
> -	 * Mark the untracked cache dirty even if it wasn't found in the index
> -	 * as it could be a new untracked file.
> -	 */
> -	untracked_cache_invalidate_path(istate, name, 0);
>  }
>  
>  /*
> -- 
> gitgitgadget
> 
>