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dir.c: refactor is_excluded()

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In a similar way to the previous commit, this extracts a new helper
function last_exclude_matching() which returns the last exclude_list
element which matched, or NULL if no match was found.  is_excluded()
becomes a wrapper around this, and just returns 0 or 1 depending on
whether any matching exclude_list element was found.

This allows callers to find out _why_ a given path was excluded,
rather than just whether it was or not, paving the way for a new git
sub-command which allows users to test their exclude lists from the
command line.

Signed-off-by: Adam Spiers <git@adamspiers.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Adam Spiers 2012-12-27 02:32:27 +00:00 committed by Junio C Hamano
parent 578cd7c3ea
commit f4cd69a674
1 changed files with 29 additions and 9 deletions
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38
dir.c
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@ -664,24 +664,44 @@ int is_excluded_from_list(const char *pathname,
return -1; /* undecided */
}
static int is_excluded(struct dir_struct *dir, const char *pathname, int *dtype_p)
/*
* Loads the exclude lists for the directory containing pathname, then
* scans all exclude lists to determine whether pathname is excluded.
* Returns the exclude_list element which matched, or NULL for
* undecided.
*/
static struct exclude *last_exclude_matching(struct dir_struct *dir,
const char *pathname,
int *dtype_p)
{
int pathlen = strlen(pathname);
int st;
struct exclude *exclude;
const char *basename = strrchr(pathname, '/');
basename = (basename) ? basename+1 : pathname;
prep_exclude(dir, pathname, basename-pathname);
for (st = EXC_CMDL; st <= EXC_FILE; st++) {
switch (is_excluded_from_list(pathname, pathlen,
basename, dtype_p,
&dir->exclude_list[st])) {
case 0:
return 0;
case 1:
return 1;
}
exclude = last_exclude_matching_from_list(
pathname, pathlen, basename, dtype_p,
&dir->exclude_list[st]);
if (exclude)
return exclude;
}
return NULL;
}
/*
* Loads the exclude lists for the directory containing pathname, then
* scans all exclude lists to determine whether pathname is excluded.
* Returns 1 if true, otherwise 0.
*/
static int is_excluded(struct dir_struct *dir, const char *pathname, int *dtype_p)
{
struct exclude *exclude =
last_exclude_matching(dir, pathname, dtype_p);
if (exclude)
return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1;
return 0;
}