Subject: [PATCH] Break down no-lstat() condition checks in verify_uptodate()

From: Nguyễn Thái Ngọc Duy <[email-masked]>
Date: Sat, 30 Jul 2011 10:55:05 +0700

Make it easier to grok under what conditions we can skip lstat().

While at there, shorten ie_match_stat() line for the sake of my eyes.

Signed-off-by: Nguyễn Thái Ngọc Duy <[email-masked]>
---
 unpack-trees.c |   15 +++++++++++++--
 1 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/unpack-trees.c b/unpack-trees.c
index 3a61d82..d8c7eb9 100644
--- a/unpack-trees.c
+++ b/unpack-trees.c
@@ -1168,11 +1168,22 @@ static int verify_uptodate_1(struct cache_entry *ce,
 {
 	struct stat st;
 
-	if (o->index_only || (!((ce->ce_flags & CE_VALID) || ce_skip_worktree(ce)) && (o->reset || ce_uptodate(ce))))
+	if (o->index_only)
+		return 0;
+
+	/*
+	 * CE_VALID and CE_SKIP_WORKTREE cheat, we better check again
+	 * if this entry is truely uptodate because this file may be
+	 * overwritten.
+	 */
+	if ((ce->ce_flags & CE_VALID) || ce_skip_worktree(ce))
+		; /* keep checking */
+	else if (o->reset || ce_uptodate(ce))
 		return 0;
 
 	if (!lstat(ce->name, &st)) {
-		unsigned changed = ie_match_stat(o->src_index, ce, &st, CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE);
+		int flags = CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE;
+		unsigned changed = ie_match_stat(o->src_index, ce, &st, flags);
 		if (!changed)
 			return 0;
 		/*
-- 
1.7.4.74.g639db