Subject: [PATCH 2/5] pathspec: add PATHSPEC_FROMROOT flag

From: Brandon Williams <[email-masked]>
Date: Fri, 24 Feb 2017 15:50:57 -0800

Add the `PATHSPEC_FROMROOT` flag to allow callers to instruct
'parse_pathspec()' that all provided pathspecs are relative to the root
of the repository.  This allows a caller to prevent a path that may be
outside of the repository from erroring out during the pathspec struct
construction.

Signed-off-by: Brandon Williams <[email-masked]>
---
 pathspec.c | 2 +-
 pathspec.h | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/pathspec.c b/pathspec.c
index 7ababb315..ff622ba18 100644
--- a/pathspec.c
+++ b/pathspec.c
@@ -353,7 +353,7 @@ static void init_pathspec_item(struct pathspec_item *item, unsigned flags,
 	if (pathspec_prefix >= 0) {
 		match = xstrdup(copyfrom);
 		prefixlen = pathspec_prefix;
-	} else if (magic & PATHSPEC_FROMTOP) {
+	} else if ((magic & PATHSPEC_FROMTOP) || (flags & PATHSPEC_FROMROOT)) {
 		match = xstrdup(copyfrom);
 		prefixlen = 0;
 	} else {
diff --git a/pathspec.h b/pathspec.h
index 49fd823dd..cad197436 100644
--- a/pathspec.h
+++ b/pathspec.h
@@ -66,6 +66,8 @@ struct pathspec {
  * allowed, then it will automatically set for every pathspec.
  */
 #define PATHSPEC_LITERAL_PATH (1<<8)
+/* For callers that know all paths are relative to the root of the repository */
+#define PATHSPEC_FROMROOT (1<<9)
 
 extern void parse_pathspec(struct pathspec *pathspec,
 			   unsigned magic_mask,
-- 
2.11.0.483.g087da7b7c-goog