[PATCH/RFC 4/4] commit: reinstate commit behavior before 3f6d56d via a config option

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

There are two groups of users with regards to "git add -N". One uses
i-t-a as a reminder that certain untracked files must be added before
the next commit. Erroring when i-t-a entries are still present
(i.e. real content not added) out gives the user a chance to add real
content.

The other group that sees i-t-a entries as a way to make Git aware of
some untracked paths so that "git diff" and "git status" show them
correctly. If they decide that some content should be staged for the
next commit, they "git add" again for real. If content in these paths is
never added, the paths are simply ignored.

3f6d56d (commit: ignore intent-to-add entries instead of refusing -
2012-02-07) changes the behavior from the former to the latter. This
patch brings bach the former behavior if core.errorCommitIta is true.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 cache-tree.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/cache-tree.c b/cache-tree.c
index ddf0cc9..b87bd3c 100644
--- a/cache-tree.c
+++ b/cache-tree.c
@@ -155,20 +155,28 @@ static int verify_cache(struct cache_entry **cache,
 {
 	int i, funny;
 	int silent = flags & WRITE_TREE_SILENT;
+	int core_error_commit_ita = 0;
+
+	git_config_get_bool("core.errorcommitita", &core_error_commit_ita);
 
 	/* Verify that the tree is merged */
 	funny = 0;
 	for (i = 0; i < entries; i++) {
 		const struct cache_entry *ce = cache[i];
-		if (ce_stage(ce)) {
+		if (ce_stage(ce) ||
+		    (core_error_commit_ita && ce_intent_to_add(ce))) {
 			if (silent)
 				return -1;
 			if (10 < ++funny) {
 				fprintf(stderr, "...\n");
 				break;
 			}
-			fprintf(stderr, "%s: unmerged (%s)\n",
-				ce->name, sha1_to_hex(ce->sha1));
+			if (ce_stage(ce))
+				fprintf(stderr, "%s: unmerged (%s)\n",
+					ce->name, sha1_to_hex(ce->sha1));
+			else
+				fprintf(stderr, "%s: not added yet\n",
+					ce->name);
 		}
 	}
 	if (funny)
-- 
2.8.2.524.g6ff3d78