Initial implementation of gitignore support

Adds support for .gitignore files to git_status_foreach() and
git_status_file().  This includes refactoring the gitattributes
code to share logic where possible.  The GIT_STATUS_IGNORED flag
will now be passed in for files that are ignored (provided they
are not already in the index or the head of repo).

3 files changed, 52 insertions, 1 deletions

diff --git a/tests-clay/core/path.c b/tests-clay/core/path.c
index bdebfb9c5..712ceb4e0 100644
--- a/tests-clay/core/path.c
+++ b/tests-clay/core/path.c
@@ -336,3 +336,39 @@ void test_core_path__10_fromurl(void)
 	check_fromurl(ABS_PATH_MARKER "c:/Temp+folder/note.txt", "file:///c:/Temp+folder/note.txt", 0);
 	check_fromurl(ABS_PATH_MARKER "a", "file:///a", 0);
 }
+
+void test_core_path__11_walkup(void)
+{
+	git_buf p = GIT_BUF_INIT, iter;
+	char *expect[] = {
+		"/a/b/c/d/e/", "/a/b/c/d/", "/a/b/c/", "/a/b/", "/a/", "/", NULL,
+		"/a/b/c/d/e", "/a/b/c/d/", "/a/b/c/", "/a/b/", "/a/", "/", NULL,
+		"/a/b/c/d/e", "/a/b/c/d/", "/a/b/c/", "/a/b/", "/a/", "/", NULL,
+		"/a/b/c/d/e", "/a/b/c/d/", "/a/b/c/", "/a/b/", "/a/", "/", NULL,
+		"/a/b/c/d/e", "/a/b/c/d/", "/a/b/c/", "/a/b/", NULL,
+		"/a/b/c/d/e", "/a/b/c/d/", "/a/b/c/", "/a/b/", NULL,
+		"this is a path", NULL,
+		"///a///b///c///d///e///", "///a///b///c///d///", "///a///b///c///", "///a///b///", "///a///", "///", NULL,
+		NULL
+	};
+	char *root[] = { NULL, NULL, "/", "", "/a/b", "/a/b/", NULL, NULL, NULL };
+	int i, j;
+
+	for (i = 0, j = 0; expect[i] != NULL; i++, j++) {
+		int cb_count = 0;
+
+		git_buf_sets(&p, expect[i]);
+
+		git_path_walk_up(&p, &iter, root[j], {
+				cl_assert(expect[i + cb_count] != NULL);
+				cl_assert_strequal(expect[i + cb_count], iter.ptr);
+				cb_count++; });
+
+		cl_assert_strequal(p.ptr, expect[i]);
+
+		/* skip to next run of expectations */
+		while (expect[i] != NULL) i++;
+	}
+
+	git_buf_free(&p);
+}
diff --git a/tests-clay/status/status_data.h b/tests-clay/status/status_data.h
index ea903c602..1a68648f4 100644
--- a/tests-clay/status/status_data.h
+++ b/tests-clay/status/status_data.h
@@ -10,6 +10,7 @@ struct status_entry_counts {
 
 static const char *entry_paths0[] = {
 	"file_deleted",
+	"ignored_file",
 	"modified_file",
 	"new_file",
 	"staged_changes",
@@ -28,6 +29,7 @@ static const char *entry_paths0[] = {
 
 static const unsigned int entry_statuses0[] = {
 	GIT_STATUS_WT_DELETED,
+	GIT_STATUS_IGNORED,
 	GIT_STATUS_WT_MODIFIED,
 	GIT_STATUS_WT_NEW,
 	GIT_STATUS_INDEX_MODIFIED,
@@ -44,5 +46,5 @@ static const unsigned int entry_statuses0[] = {
 	GIT_STATUS_WT_NEW,
 };
 
-static const size_t entry_count0 = 14;
+static const size_t entry_count0 = 15;
 
diff --git a/tests-clay/status/worktree.c b/tests-clay/status/worktree.c
index 1e8a5ddbc..15cbb2828 100644
--- a/tests-clay/status/worktree.c
+++ b/tests-clay/status/worktree.c
@@ -122,3 +122,16 @@ void test_status_worktree__empty_repository(void)
 	git_status_foreach(_repository, cb_status__count, &count);
 	cl_assert(count == 0);
 }
+
+void test_status_worktree__single_file(void)
+{
+	int i;
+	unsigned int status_flags;
+
+	for (i = 0; i < (int)entry_count0; i++) {
+		cl_git_pass(
+			git_status_file(&status_flags, _repository, entry_paths0[i])
+		);
+		cl_assert(entry_statuses0[i] == status_flags);
+	}
+}