Improve building ignore file lists

The routines to push and pop ignore files while traversing a
directory had some issues. In particular, setting up the initial
list would sometimes push an ignore file before it ought to be
applied if the starting path was a directory containing an ignore
file. Also, the pop function was not always matching the right
part of the path and would fail to pop ignores from the list in
some cases.

This adds some tests that exercise a particular problematic case
and then fixes the problems that I could find related to this.

At some point, I'd like to isolate this ignore rule management
code and rewrite it, but that's a larger project and right now,
I'll opt to just try to fix the broken behaviors.

1 files changed, 3 insertions, 2 deletions

diff --git a/src/ignore.h b/src/ignore.h
index cc114b001..851c824bf 100644
--- a/src/ignore.h
+++ b/src/ignore.h
@@ -24,14 +24,15 @@
  */
 typedef struct {
 	git_repository *repo;
-	git_buf dir;
+	git_buf dir; /* current directory reflected in ign_path */
 	git_attr_file *ign_internal;
 	git_vector ign_path;
 	git_vector ign_global;
 	int ignore_case;
 } git_ignores;
 
-extern int git_ignore__for_path(git_repository *repo, const char *path, git_ignores *ign);
+extern int git_ignore__for_path(
+	git_repository *repo, const char *path, git_ignores *ign);
 
 extern int git_ignore__push_dir(git_ignores *ign, const char *dir);