On 2014-01-31 21.22, Martin Erik Werner wrote:
> In order to extract the part of an absolute path which lies inside the
> repo, it is not possible to directly use real_path, since that would
> dereference symlinks both outside and inside the work tree.
> Add an 'abspath_part_inside_repo' function which incrementally checks
> each path level by temporarily NUL-terminating at each '/' and comparing
> against the work tree path. When a match is found, it copies the
> remainder (which will be the in-repo part) to a destination
> buffer.
> The path being the filesystem root or exactly equal to the work tree are
> special cases handled separately, since then there is no directory
> separator between the work tree and in-repo part.
> Signed-off-by: Martin Erik Werner <martinerikwer...@gmail.com>
> ---
>  cache.h |  1 +
>  setup.c | 63 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 64 insertions(+)
> diff --git a/cache.h b/cache.h
> index ce377e1..242f27d 100644
> --- a/cache.h
> +++ b/cache.h
> @@ -426,6 +426,7 @@ extern void verify_filename(const char *prefix,
>                           int diagnose_misspelt_rev);
>  extern void verify_non_filename(const char *prefix, const char *name);
>  extern int path_inside_repo(const char *prefix, const char *path);
> +extern int abspath_part_inside_repo(char *dst, const char *path);
abspath_part_inside_repo() is only used in setup.c, isn't it?
In this case we don't need it in cache.h, it can be declared inside setup.c as

static int abspath_part_inside_repo(char *dst, const char *path);
(or "static inline" )

(And not in this patch: see the final setup.c:)

        if (g) {
            return NULL;

If this is the only caller of abspath_part_inside_repo(),
then  do we need npath 2 times as a parameter ?
Or can we re-write it to look like this:

static inline int abspath_part_inside_repo(char *path)

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