Re: [PATCH v3 1/1] abspath_part_inside_repo: respect core.fileMode

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"Johannes Schindelin via GitGitGadget" <gitgitgadget@xxxxxxxxx>
writes:

> diff --git a/setup.c b/setup.c
> index 1be5037f12..291bfb2128 100644
> --- a/setup.c
> +++ b/setup.c
> @@ -39,7 +39,7 @@ static int abspath_part_inside_repo(char *path)
>  	off = offset_1st_component(path);
>  
>  	/* check if work tree is already the prefix */
> -	if (wtlen <= len && !strncmp(path, work_tree, wtlen)) {
> +	if (wtlen <= len && !fspathncmp(path, work_tree, wtlen)) {
>  		if (path[wtlen] == '/') {
>  			memmove(path, path + wtlen + 1, len - wtlen);
>  			return 0;
> @@ -59,7 +59,7 @@ static int abspath_part_inside_repo(char *path)
>  		path++;
>  		if (*path == '/') {
>  			*path = '\0';
> -			if (strcmp(real_path(path0), work_tree) == 0) {
> +			if (fspathcmp(real_path(path0), work_tree) == 0) {
>  				memmove(path0, path + 1, len - (path - path0));
>  				return 0;
>  			}
> @@ -68,7 +68,7 @@ static int abspath_part_inside_repo(char *path)
>  	}
>  
>  	/* check whole path */
> -	if (strcmp(real_path(path0), work_tree) == 0) {
> +	if (fspathcmp(real_path(path0), work_tree) == 0) {
>  		*path0 = '\0';
>  		return 0;
>  	}

So the idea is that the path to the top level of the working tree
must be compared with fspath[n]cmp() to what was given.  After
stripping that prefix, the caller uses the result just like it uses
a non-absolute path, which is why the necessary changes are isolated
to this function.

Makes sense.

> diff --git a/t/t3700-add.sh b/t/t3700-add.sh
> index 37729ba258..be582a513b 100755
> --- a/t/t3700-add.sh
> +++ b/t/t3700-add.sh
> @@ -402,4 +402,11 @@ test_expect_success 'all statuses changed in folder if . is given' '
>  	test $(git ls-files --stage | grep ^100755 | wc -l) -eq 0
>  '
>  
> +test_expect_success CASE_INSENSITIVE_FS 'path is case-insensitive' '
> +	path="$(pwd)/BLUB" &&
> +	touch "$path" &&
> +	downcased="$(echo "$path" | tr A-Z a-z)" &&
> +	git add "$downcased"
> +'

One problem with the above test is that it leaves it unspecified if
the resulting index entry is "blub" or "BLUB".  Shouldn't we verify
that "git add" adds an expected path to the index, instead of
blindly trusting that it says "Yeah, I did as I was told" with its
exit status?  Would we be adding 'blub' as that is what we told
'git' to add, or would it be 'BLUB' as that is what exists on the
filesystem that is case insensitive but case preserving?

On a project whose participants all are on case insensitive
filesystems, the above does not matter by definition, but once a
project wants to work with their case sensitive friends, it starts
to matter.

Other than that, looks good to me.

Thanks.


> +
>  test_done



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