From: Junio C Hamano <junkio@cox.net>
Date: Wed, 17 May 2006 22:54:39 +0000 (-0700)
Subject: Merge branch 'jc/read-tree-safety' into next
X-Git-Url: https://git.verplant.org/?a=commitdiff_plain;h=22b49b7fb960921146ebc7b49fe1f014e828b671;p=git.git

Merge branch 'jc/read-tree-safety' into next

* jc/read-tree-safety:
  read-tree -m -u: do not overwrite or remove untracked working tree files.
---

22b49b7fb960921146ebc7b49fe1f014e828b671
diff --cc read-tree.c
index 675a59f8,82e2a9a4..a3ada55c
--- a/read-tree.c
+++ b/read-tree.c
@@@ -429,12 -426,21 +429,27 @@@ static void verify_uptodate(struct cach
  	die("Entry '%s' not uptodate. Cannot merge.", ce->name);
  }
  
 +static void invalidate_ce_path(struct cache_entry *ce)
 +{
 +	if (ce)
 +		cache_tree_invalidate_path(active_cache_tree, ce->name);
 +}
 +
+ /*
+  * We do not want to remove or overwrite a working tree file that
+  * is not tracked.
+  */
+ static void verify_absent(const char *path, const char *action)
+ {
+ 	struct stat st;
+ 
+ 	if (index_only || reset || !update)
+ 		return;
+ 	if (!lstat(path, &st))
+ 		die("Untracked working tree file '%s' "
+ 		    "would be %s by merge.", path, action);
+ }
+ 
  static int merged_entry(struct cache_entry *merge, struct cache_entry *old)
  {
  	merge->ce_flags |= htons(CE_UPDATE);
@@@ -450,11 -456,11 +465,14 @@@
  			*merge = *old;
  		} else {
  			verify_uptodate(old);
 +			invalidate_ce_path(old);
  		}
  	}
--	else
++	else {
+ 		verify_absent(merge->name, "overwritten");
 +		invalidate_ce_path(merge);
++	}
+ 
  	merge->ce_flags &= ~htons(CE_STAGEMASK);
  	add_cache_entry(merge, ADD_CACHE_OK_TO_ADD);
  	return 1;
@@@ -464,9 -470,10 +482,11 @@@ static int deleted_entry(struct cache_e
  {
  	if (old)
  		verify_uptodate(old);
+ 	else
+ 		verify_absent(ce->name, "removed");
  	ce->ce_mode = 0;
  	add_cache_entry(ce, ADD_CACHE_OK_TO_ADD);
 +	invalidate_ce_path(ce);
  	return 1;
  }
  
@@@ -723,10 -723,8 +758,10 @@@ static int oneway_merge(struct cache_en
  		return error("Cannot do a oneway merge of %d trees",
  			     merge_size);
  
 -	if (!a)
 +	if (!a) {
 +		invalidate_ce_path(old);
- 		return deleted_entry(old, NULL);
+ 		return deleted_entry(old, old);
 +	}
  	if (old && same(old, a)) {
  		if (reset) {
  			struct stat st;