Re: [RFC PATCH v2 2/4] gitignore: read from index if .gitignore is assume-unchanged

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Hi,

On Mon, 10 Aug 2009, Nguyễn Thái Ngọc Duy wrote:

> diff --git a/dir.c b/dir.c
> index e05b850..e55344f 100644
> --- a/dir.c
> +++ b/dir.c
> @@ -200,11 +200,36 @@ void add_exclude(const char *string, const char *base,
>  	which->excludes[which->nr++] = x;
>  }
>  
> +static void *read_index_data(const char *path, size_t *size)

How about calling it "read_assume_unchanged_from_index()" instead?  I 
suggest this because it does not read the index from the data if the path 
is not marked assume unchanged...

> @@ -212,27 +237,31 @@ static int add_excludes_from_file_1(const char *fname,
>
> [...]
>  
>  	if (buf_p)
>  		*buf_p = buf;
> -	buf[size++] = '\n';
>  	entry = buf;
> -	for (i = 0; i < size; i++) {
> -		if (buf[i] == '\n') {
> +	for (i = 0; i <= size; i++) {
> +		if (i == size || buf[i] == '\n') {
>  			if (entry != buf + i && entry[0] != '#') {
>  				buf[i - (i && buf[i-1] == '\r')] = 0;
>  				add_exclude(entry, base, baselen, which);

Should this change not rather be a separate one?

> @@ -241,17 +270,12 @@ static int add_excludes_from_file_1(const char *fname,
>  		}
>  	}
>  	return 0;
> -
> - err:
> -	if (0 <= fd)
> -		close(fd);
> -	return -1;
>  }
>  
>  void add_excludes_from_file(struct dir_struct *dir, const char *fname)
>  {
>  	if (add_excludes_from_file_1(fname, "", 0, NULL,
> -				     &dir->exclude_list[EXC_FILE]) < 0)
> +				     &dir->exclude_list[EXC_FILE], 0) < 0)

Could you mention in the commit message why this function does not want to 
check the index (I _guess_ it is because this code path only tries to read 
.git/info/exclude, but it would be better to be sure).

>  		die("cannot use %s as an exclude file", fname);
>  }
>  
> @@ -302,7 +326,7 @@ static void prep_exclude(struct dir_struct *dir, const char *base, int baselen)
>  		strcpy(dir->basebuf + stk->baselen, dir->exclude_per_dir);
>  		add_excludes_from_file_1(dir->basebuf,
>  					 dir->basebuf, stk->baselen,
> -					 &stk->filebuf, el);
> +					 &stk->filebuf, el, 1);
>  		dir->exclude_stack = stk;
>  		current = stk->baselen;
>  	}
> diff --git a/t/t3001-ls-files-others-exclude.sh b/t/t3001-ls-files-others-exclude.sh
> index c65bca8..88b69bc 100755
> --- a/t/t3001-ls-files-others-exclude.sh
> +++ b/t/t3001-ls-files-others-exclude.sh
> @@ -85,6 +85,26 @@ test_expect_success \
>         >output &&
>       test_cmp expect output'
>  
> +test_expect_success 'setup sparse gitignore' '
> +	git add .gitignore one/.gitignore one/two/.gitignore &&
> +	git update-index --assume-unchanged .gitignore one/.gitignore one/two/.gitignore &&
> +	rm .gitignore one/.gitignore one/two/.gitignore
> +'

You're probably less sloppy than me; I'd have defined a variable like 
this:

	ignores=".gitignore one/.gitignore one/two/.gitignore"

and used it for the three calls, just to make sure that I do not fsck 
anything up there due to fat fingers.

Thanks,
Dscho

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